You're storing the .Text
properties of the textboxes directly into the database, this doesn't work. The .Text
properties are String
s (i.e. simple text) and not typed as DateTime
instances. Do the conversion first, then it will work.
Do this for each date parameter:
Dim bookIssueDate As DateTime = DateTime.ParseExact( txtBookDateIssue.Text, "dd/MM/yyyy", CultureInfo.InvariantCulture ) cmd.Parameters.Add( New OleDbParameter("@Date_Issue", bookIssueDate ) )
Note that this code will crash/fail if a user enters an invalid date, e.g. "64/48/9999", I suggest using DateTime.TryParse
or DateTime.TryParseExact
, but implementing that is an exercise for the reader.
The problem is you haven't declared your interface state replace any with your suitable variable type of the 'value'
interface AppProps {
//code related to your props goes here
}
interface AppState {
value: any
}
class App extends React.Component<AppProps, AppState> {
// ...
}
To resolve this problem HttpClient
is Angular's mechanism for communicating with a remote server over HTTP.
To make HttpClient
available everywhere in the app,
open the root AppModule
,
import the HttpClientModule
from @angular/common/http
,
import { HttpClientModule } from '@angular/common/http';
add it to the @NgModule.imports
array.
imports:[HttpClientModule, ]
You are having a controlled component where input
value is determined by this.state.city
. So once you submit you have to clear your state which will clear your input automatically.
onHandleSubmit(e) {
e.preventDefault();
const city = this.state.city;
this.props.onSearchTermChange(city);
this.setState({
city: ''
});
}
This has worked for me:
let webApiUrl = 'example.com/getStuff';
let tokenStr = 'xxyyzz';
axios.get(webApiUrl, { headers: {"Authorization" : `Bearer ${tokenStr}`} });
To anyone else reading this who didn't have much luck with the above solutions or just wants a simple drop-in solution, this package worked for me: https://www.npmjs.com/package/react-anchor-link-smooth-scroll. Happy Hacking!
type this in your command line, should work for all ubuntu between 16.04, 18.04 and 20.04.
$ sudo update-alternatives --config php
and this is what you will get
There are 4 choices for the alternative php (providing /usr/bin/php).
Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/bin/php7.2 72 auto mode
1 /usr/bin/php5.6 56 manual mode
2 /usr/bin/php7.0 70 manual mode
3 /usr/bin/php7.1 71 manual mode
4 /usr/bin/php7.2 72 manual mode
Press <enter> to keep the current choice[*], or type selection number:
Choose the appropriate version
This is rather verbose and don't like it but it's the only thing that worked for me:
if (inputFile && inputFile.current) {
((inputFile.current as never) as HTMLInputElement).click()
}
only
if (inputFile && inputFile.current) {
inputFile.current.click() // also with ! or ? didn't work
}
didn't work for me. Typesript version: 3.9.7 with eslint and recommended rules.
There are many ways in which you can create unique keys
, the simplest method is to use the index when iterating arrays.
Example
var lists = this.state.lists.map(function(list, index) {
return(
<div key={index}>
<div key={list.name} id={list.name}>
<h2 key={"header"+list.name}>{list.name}</h2>
<ListForm update={lst.updateSaved} name={list.name}/>
</div>
</div>
)
});
Wherever you're lopping over data, here this.state.lists.map
, you can pass second parameter function(list, index)
to the callback as well and that will be its index
value and it will be unique for all the items in the array.
And then you can use it like
<div key={index}>
You can do the same here as well
var savedLists = this.state.savedLists.map(function(list, index) {
var list_data = list.data;
list_data.map(function(data, index) {
return (
<li key={index}>{data}</li>
)
});
return(
<div key={index}>
<h2>{list.name}</h2>
<ul>
{list_data}
</ul>
</div>
)
});
So whats the solution then?
Many
new Date().getTime();
and prefix it with something from the item you're iterating to guarantee its uniquenessExample:
const generateKey = (pre) => {
return `${ pre }_${ new Date().getTime() }`;
}
const savedLists = this.state.savedLists.map( list => {
const list_data = list.data.map( data => <li key={ generateKey(data) }>{ data }</li> );
return(
<div key={ generateKey(list.name) }>
<h2>{ list.name }</h2>
<ul>
{ list_data }
</ul>
</div>
)
});
It appears Microsoft now stores them in a SQLite database file called plum.sqlite located here:
C:\Users\%username%\AppData\Local\Packages\Microsoft.MicrosoftStickyNotes_8wekyb3d8bbwe\LocalState\plum.sqlite
$insertation = "INSERT INTO contactinfo (name, email, subject, date, comments)
VALUES ('$name', '$email', '$subject', CURRENT_TIMESTAMP(), '$comments')";
You can use this Query. CURRENT_TIMESTAMP
Remember to use the parenthesis CURRENT_TIMESTAMP()
I had the same error message following a tutorial. Our issue seems to be 'url: this.props.url' in the ajax call. In React.DOM when you are creating your element, mine looks like this.
ReactDOM.render(
<CommentBox data="/api/comments" pollInterval={2000}/>,
document.getElementById('content')
);
Well, this CommentBox does not have a url in its props, just data. When I switched url: this.props.url
-> url: this.props.data
, it made the right call to the server and I got back the expected data.
I hope it helps.
Here is the simplest way to resolve this error:
1) Go to your pom.xml file path
2) And edit the pom.xml like:
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.12</version>
</plugin>
</plugins>
3) Save the file That's it.
You can find some technical comparison on npmcompare
Comparing browserify vs. grunt vs. gulp vs. webpack
As you can see webpack is very well maintained with a new version coming out every 4 days on average. But Gulp seems to have the biggest community of them all (with over 20K stars on Github) Grunt seems a bit neglected (compared to the others)
So if need to choose one over the other i would go with Gulp
This is the code to create dropdown in Angular 7, 8, 9
.html
file code
<div>
<label>Summary: </label>
<select (change)="SelectItem($event.target.value)" class="select">
<option value="0">--All--</option>
<option *ngFor="let item of items" value="{{item.Id.Value}}">
{{item.Name}}
</option>
</select>
</div>
.ts
file code
SelectItem(filterVal: any)
{
var id=filterVal;
//code
}
items
is an array which should be initialized in .ts
file.
When you want to test a state of application and in case of a problem return HTTP error I would suggest a filter. The filter below handles all HTTP requests. The shortest solution in Spring Boot with a javax filter.
In the implementation can be various conditions. In my case the applicationManager testing if the application is ready.
import ...ApplicationManager;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import javax.servlet.*;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@Component
public class SystemIsReadyFilter implements Filter {
@Autowired
private ApplicationManager applicationManager;
@Override
public void init(FilterConfig filterConfig) throws ServletException {}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
if (!applicationManager.isApplicationReady()) {
((HttpServletResponse) response).sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE, "The service is booting.");
} else {
chain.doFilter(request, response);
}
}
@Override
public void destroy() {}
}
it's a pure PHP setting. The alternative is to increase the execution time limit only for specific php scripts, by inserting on top of that php file, the following:
ini_set('max_execution_time', 180); //3 minutes
1. You just have to use an arrow function in the Onclick event like this:
<th value={column} onClick={() => that.handleSort(theValue)} >{column}</th>
2.Then bind this in the constructor method:
this.handleSort = this.handleSort.bind(this);
3.And finally get the value in the function:
handleSort(theValue){
console.log(theValue);
}
I'm adding this because it's not mentioned in any of the other answers. You can give a container a specific hostname at runtime with the -h directive.
docker run -h=my.docker.container.example.com ubuntu:latest
You can use backticks (or whatever equivalent your shell uses) to get the output of hosthame into the -h argument.
docker run -h=`hostname` ubuntu:latest
There is a caveat, the value of hostname will be taken from the host you run the command from, so if you want the hostname of a virtual machine that's running your docker container then using hostname as an argument may not be correct if you are using the host machine to execute docker commands on the virtual machine.
WORKED FOR ME :)
i upgraded the java to the latest version 8 previously it was 7 and then go to OPEN MODULE SETTING right clicking on project and changed the jdk path to /usr/lib/jvm/java-8-oracle the new java 8 installed. And restart the studio
check in /usr/lib/jvm for java 8 folder name
By default Spring Boot gives json with error details.
curl -v localhost:8080/greet | json_pp
[...]
< HTTP/1.1 400 Bad Request
[...]
{
"timestamp" : 1413313361387,
"exception" : "org.springframework.web.bind.MissingServletRequestParameterException",
"status" : 400,
"error" : "Bad Request",
"path" : "/greet",
"message" : "Required String parameter 'name' is not present"
}
It also works for all kind of request mapping errors. Check this article http://www.jayway.com/2014/10/19/spring-boot-error-responses/
If you want to create log it to NoSQL. You can create @ControllerAdvice where you would log it and then re-throw the exception. There is example in documentation https://spring.io/blog/2013/11/01/exception-handling-in-spring-mvc
You can also do like this:
var mocha = require('mocha')
var describe = mocha.describe
var it = mocha.it
var assert = require('chai').assert
describe('#indexOf()', function() {
it('should return -1 when not present', function() {
assert.equal([1,2,3].indexOf(4), -1)
})
})
Reference: http://mochajs.org/#require
Some last version of Ubuntu installs Python 3.4 by default and the CMake version from Ubuntu (2.8) only searches up to Python 3.3.
Try to add set(Python_ADDITIONAL_VERSIONS 3.4)
before the find_package
statement.
Remember to clean CMakeCache.txt
too.
No, not all browsers support the sizes
attribute:
Note that some platforms define specific sizes:
manifest.json
if it is present. Plus, Chrome uses the Apple Touch icon for bookmarks.Copied from the stacktrace:
BeanInstantiationException: Could not instantiate bean class [com.gestEtu.project.model.dao.CompteDAOHib]: No default constructor found; nested exception is java.lang.NoSuchMethodException: com.gestEtu.project.model.dao.CompteDAOHib.<init>()
By default, Spring will try to instantiate beans by calling a default (no-arg) constructor. The problem in your case is that the implementation of the CompteDAOHib
has a constructor with a SessionFactory
argument. By adding the @Autowired
annotation to a constructor, Spring will attempt to find a bean of matching type, SessionFactory
in your case, and provide it as a constructor argument, e.g.
@Autowired
public CompteDAOHib(SessionFactory sessionFactory) {
// ...
}
Converting my comment into an answer to complement @Kiran Chala's answer as it seems helpful for the audiences-
When we mark a parameter as optional in the action uri using ?
character then we must provide default values to the parameters in the method signature as shown below:
MyMethod(string name = "someDefaultValue", int? Id = null)
Make sure you can run powershell scripts (it is disabled by default). Likely you have already done this. http://technet.microsoft.com/en-us/library/ee176949.aspx
Set-ExecutionPolicy RemoteSigned
Run this python script on your powershell script helloworld.py
:
# -*- coding: iso-8859-1 -*-
import subprocess, sys
p = subprocess.Popen(["powershell.exe",
"C:\\Users\\USER\\Desktop\\helloworld.ps1"],
stdout=sys.stdout)
p.communicate()
This code is based on python3.4 (or any 3.x series interpreter), though it should work on python2.x series as well.
C:\Users\MacEwin\Desktop>python helloworld.py
Hello World
I am a pragmatist, so I will try to look at this in terms of costs and benefits.
Note that for any disadvantage I give, I recognize that they are solvable. That's why I don't look at anything as black and white, but rather, costs and benefits.
Advantages
Disadvantages
Again, I recognize that every one of these problems is solvable, at some cost. But there comes a point where you are spending all your time solving problems which you could have just avoided in the first place. It comes back to the benefits and how important they are to you.
In Place of using this
MsgBox(json.SelectToken("Venue").SelectToken("ID"))
You can also use
MsgBox(json.SelectToken("Venue.ID"))
Related to Eugen's answer, you can solve this particular case by creating a wrapper POJO object that contains a Collection<COrder>
as its member variable. This will properly guide Jackson to place the actual Collection
data inside the POJO's member variable and produce the JSON you are looking for in the API request.
Example:
public class ApiRequest {
@JsonProperty("collection")
private Collection<COrder> collection;
// getters
}
Then set the parameter type of COrderRestService.postOrder()
to be your new ApiRequest
wrapper POJO instead of Collection<COrder>
.
Private Sub Button3_Click(sender As System.Object, e As System.EventArgs) _
Handles Button3.Click
Dim box = New AboutBox1()
box.Show()
End Sub
Here is how to do it by either option value or index. This example is a bit crude, but it shows how to do what you want:
html:
<mat-form-field id="your-id">
<mat-select>
<mat-option [value]="1">1</mat-option>
<mat-option [value]="2">2</mat-option>
</mat-select>
</mat-form-field>
ts:
function selectOptionByOptionValue(selectFormFieldElementId, valueToFind) {
const formField = element(by.id(selectFormFieldElementId));
formField.click().then(() => {
formField.element(by.tagName('mat-select'))
.getAttribute('aria-owns').then((optionIdsString: string) => {
const optionIds = optionIdsString.split(' ');
for (let optionId of optionIds) {
const option = element(by.id(optionId));
option.getText().then((text) => {
if (text === valueToFind) {
option.click();
}
});
}
});
});
}
function selectOptionByOptionIndex(selectFormFieldElementId, index) {
const formField = element(by.id(selectFormFieldElementId));
formField.click().then(() => {
formField.element(by.tagName('mat-select'))
.getAttribute('aria-owns').then((optionIdsString: string) => {
const optionIds = optionIdsString.split(' ');
const optionId = optionIds[index];
const option = element(by.id(optionId));
option.click();
});
});
}
selectOptionByOptionValue('your-id', '1'); //selects first option
selectOptionByOptionIndex('your-id', 1); //selects second option
A very simple way to read an external script into an sqlite database in python is using executescript()
:
import sqlite3
conn = sqlite3.connect('csc455_HW3.db')
with open('ZooDatabase.sql', 'r') as sql_file:
conn.executescript(sql_file.read())
conn.close()
I had the same error and it turned out to be a circular dependency between a module or class loaded by the settings and the settings module itself. In my case it was a middleware class which was named in the settings which itself tried to load the settings.
A simple plot for sine and cosine curves with a legend.
Used matplotlib.pyplot
import math
import matplotlib.pyplot as plt
x=[]
for i in range(-314,314):
x.append(i/100)
ysin=[math.sin(i) for i in x]
ycos=[math.cos(i) for i in x]
plt.plot(x,ysin,label='sin(x)') #specify label for the corresponding curve
plt.plot(x,ycos,label='cos(x)')
plt.xticks([-3.14,-1.57,0,1.57,3.14],['-$\pi$','-$\pi$/2',0,'$\pi$/2','$\pi$'])
plt.legend()
plt.show()
This is a very simple to create file in git bash at first write touch then file name with extension
for example
touch filename.extension
FragmentStatePagerAdapter:
with FragmentStatePagerAdapter
,your unneeded fragment is
destroyed.A transaction is committed to completely remove the
fragment from your activity's FragmentManager
.
The state in FragmentStatePagerAdapter
comes from the fact that it
will save out your fragment's Bundle
from savedInstanceState
when
it is destroyed.When the user navigates back,the new fragment will be
restored using the fragment's state.
FragmentPagerAdapter:
By comparision FragmentPagerAdapter
does nothing of the kind.When
the fragment is no longer needed.FragmentPagerAdapter
calls
detach(Fragment)
on the transaction instead of remove(Fragment)
.
This destroy's the fragment's view but leaves the fragment's instance
alive in the FragmentManager
.so the fragments created in the
FragmentPagerAdapter
are never destroyed.
"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" " --allow-running-insecure-content"
This was the best solution I found after more time than I care to admit. Basically, add target="_self" to each link that you need to insure a page reload.
http://blog.panjiesw.com/posts/2013/09/angularjs-normal-links-with-html5mode/
On Windows the subprocesses will import (i.e. execute) the main module at start. You need to insert an if __name__ == '__main__':
guard in the main module to avoid creating subprocesses recursively.
Modified testMain.py
:
import parallelTestModule
if __name__ == '__main__':
extractor = parallelTestModule.ParallelExtractor()
extractor.runInParallel(numProcesses=2, numThreads=4)
This reloads the datagridview:
Me.ABCListTableAdapter.Fill(Me.ABCLISTDATASET.ABCList)
Hope this helps
There is another issue you have to take care of it when you try mapping column which is string length,
for example TK_NO nvarchar(50)
you will have to map to
the same length as the destination field.
Based on some (minimal) benchmarks using the timeit
module it seems that the following has similar if not better performance than the accepted answer
new_lst = [a, *lst]
As with [a] + list
this will create a new list and not mutate lst
.
If your intention is to mutate the list then use lst.insert(0, a)
.
I also had this issue and my solution was different, so adding here for any who have similar problem.
My controller had:
@RequestMapping(value = "/setPassword", method = RequestMethod.POST)
public String setPassword(Model model, @RequestParameter SetPassword setPassword) {
...
}
The issue was that this should be @ModelAttribute
for the object, not @RequestParameter
. The error message for this is the same as you describe in your question.
@RequestMapping(value = "/setPassword", method = RequestMethod.POST)
public String setPassword(Model model, @ModelAttribute SetPassword setPassword) {
...
}
Try using the Format
function:
Private Sub btncalc_Click(ByVal sender As System.Object,
ByVal e As System.EventArgs) Handles btncalc.Click
txtA.Text = Format(Val(txtD.Text) / Val(txtC.Text) *
Val(txtF.Text) / Val(txtE.Text), "0.00")
txtB.Text = Format(Val(txtA.Text) * 1000 / Val(txtG.Text), "0.00")
End Sub
To get the cell value, you need to read it directly from DataGridView1
using e.RowIndex
and e.ColumnIndex
properties.
Eg:
Private Sub DataGridView1_CellContentClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellContentClick
Dim value As Object = DataGridView1.Rows(e.RowIndex).Cells(e.ColumnIndex).Value
If IsDBNull(value) Then
TextBox1.Text = "" ' blank if dbnull values
Else
TextBox1.Text = CType(value, String)
End If
End Sub
According to nginx documentation
there is no syntax for NOT matching a regular expression. Instead, match the target regular expression and assign an empty block, then use location / to match anything else
So you could define something like
location ~ (dir1|file2\.php) {
# empty
}
location / {
rewrite ^/(.*) http://example.com/$1 permanent;
}
I had the same problem (openssl) and this worked for me on Ubuntu 14.04.1 LTS. The solution is the same up to Ubuntu 18.04 (tested).
sudo apt-get install libssl-dev
In my case, this error was caused by the fact that I was defining the ActionChains element outside of the
def parse(self, response):
method when using a combination of Selenium and Scrapy, e.g.:
Doesn't work:
class MySpider(scrapy.Spider):
action_chains = ActionChains(self.driver)
Moving action_chains = ActionChains(self.driver)
inside the def parse(self, response):
solved the problem, e.g.:
Works:
def parse(self, response):
self.driver.get(response.url)
action_chains = ActionChains(self.driver)
In the last statement you are converting the duration to time which also considers the timezone. I assume that your timezone is +530, so 5 hours and 30 minutes gets added to 30 minutes. You can do as given below.
var eventTime= 1366549200; // Timestamp - Sun, 21 Apr 2013 13:00:00 GMT
var currentTime = 1366547400; // Timestamp - Sun, 21 Apr 2013 12:30:00 GMT
var diffTime = eventTime - currentTime;
var duration = moment.duration(diffTime*1000, 'milliseconds');
var interval = 1000;
setInterval(function(){
duration = moment.duration(duration - interval, 'milliseconds');
$('.countdown').text(duration.hours() + ":" + duration.minutes() + ":" + duration.seconds())
}, interval);
You could set your channel to nil in addition to closing it. That way you can check if it is nil.
example in the playground: https://play.golang.org/p/v0f3d4DisCz
edit: This is actually a bad solution as demonstrated in the next example, because setting the channel to nil in a function would break it: https://play.golang.org/p/YVE2-LV9TOp
I had the same problem and finally figured out, that it was the Logitech SetPoint Software.
Deinstalled it - and the error is gone.
Read this https://docs.djangoproject.com/en/dev/howto/static-files/:
For local development, if you are using runserver or adding staticfiles_urlpatterns to your URLconf, you’re done with the setup – your static files will automatically be served at the default (for newly created projects) STATIC_URL of /static/.
And try:
~/tmp$ django-admin.py startproject myprj
~/tmp$ cd myprj/
~/tmp/myprj$ chmod a+x manage.py
~/tmp/myprj$ ./manage.py startapp myapp
Then add 'myapp'
to INSTALLED_APPS
(myprj/settings.py
).
~/tmp/myprj$ cd myapp/
~/tmp/myprj/myapp$ mkdir static
~/tmp/myprj/myapp$ echo 'alert("hello!");' > static/hello.js
~/tmp/myprj/myapp$ mkdir templates
~/tmp/myprj/myapp$ echo '<script src="{{ STATIC_URL }}hello.js"></script>' > templates/hello.html
Edit myprj/urls.py
:
from django.conf.urls import patterns, include, url
from django.views.generic import TemplateView
class HelloView(TemplateView):
template_name = "hello.html"
urlpatterns = patterns('',
url(r'^$', HelloView.as_view(), name='hello'),
)
And run it:
~/tmp/myprj/myapp$ cd ..
~/tmp/myprj$ ./manage.py runserver
It works!
Django 1.5 introduced the allowed hosts setting that is required for security reasons. A settings file created with Django 1.5 has this new section which you need to add:
# Hosts/domain names that are valid for this site; required if DEBUG is False
# See https://docs.djangoproject.com/en/1.9/ref/settings/#allowed-hosts
ALLOWED_HOSTS = []
Add your host here like ['www.beta800.net']
or ['*']
for a quick test, but don't use ['*']
for production.
No, unlike in a lot of other languages, XSLT variables cannot change their values after they are created. You can however, avoid extraneous code with a technique like this:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes" omit-xml-declaration="yes"/>
<xsl:variable name="mapping">
<item key="1" v1="A" v2="B" />
<item key="2" v1="X" v2="Y" />
</xsl:variable>
<xsl:variable name="mappingNode"
select="document('')//xsl:variable[@name = 'mapping']" />
<xsl:template match="....">
<xsl:variable name="testVariable" select="'1'" />
<xsl:variable name="values" select="$mappingNode/item[@key = $testVariable]" />
<xsl:variable name="variable1" select="$values/@v1" />
<xsl:variable name="variable2" select="$values/@v2" />
</xsl:template>
</xsl:stylesheet>
In fact, once you've got the values
variable, you may not even need separate variable1
and variable2
variables. You could just use $values/@v1
and $values/@v2
instead.
The androidmanifest.xml and policies.xml files on the sample page are invisible in my browser due to it trying to format the XML files as HTML. I'm only posting this for reference for the convenience of others, this is sourced from the sample page.
Thanks all for this helpful question!
AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.kns"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="8" />
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".LockScreenActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".MyAdmin"
android:permission="android.permission.BIND_DEVICE_ADMIN">
<meta-data android:name="android.app.device_admin"
android:resource="@xml/policies" />
<intent-filter>
<action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
</intent-filter>
</receiver>
</application>
</manifest>
policies.xml
<?xml version="1.0" encoding="utf-8"?>
<device-admin xmlns:android="http://schemas.android.com/apk/res/android">
<uses-policies>
<limit-password />
<watch-login />
<reset-password />
<force-lock />
<wipe-data />
</uses-policies>
</device-admin>
I'd recommend starting by carefully reading this post by Peter Norvig. (I had to something similar and I found it extremely useful.)
The following function, in particular has the ideas that you now need to make your spell checker more sophisticated: splitting, deleting, transposing, and inserting the irregular words to 'correct' them.
def edits1(word):
splits = [(word[:i], word[i:]) for i in range(len(word) + 1)]
deletes = [a + b[1:] for a, b in splits if b]
transposes = [a + b[1] + b[0] + b[2:] for a, b in splits if len(b)>1]
replaces = [a + c + b[1:] for a, b in splits for c in alphabet if b]
inserts = [a + c + b for a, b in splits for c in alphabet]
return set(deletes + transposes + replaces + inserts)
Note: The above is one snippet from Norvig's spelling corrector
And the good news is that you can incrementally add to and keep improving your spell-checker.
Hope that helps.
For me the problem was my file encoding...I used powershell to write the xml file and this was not UTF-8 ... It seems that spring requires UTF8 because as soon as I changed the encoding (using notepad++) it works again without any errors
Now i Use in my powershellscript the following line to output the xml file in UTF-8: [IO.File]::WriteAllLines($fname_dataloader_xml_config_file, $dataloader_configfile)
instead of using the redirection operator > to create my file
Note: I didn't put any xml parameters in my beans tag and it works
Annotation-driven indicates to Spring that it should scan for annotated beans, and to not just rely on XML bean configuration. Component-scan indicates where to look for those beans.
Here's some doc: http://static.springsource.org/spring/docs/current/spring-framework-reference/html/mvc.html#mvc-config-enable
This might be helpful
I converted this from C# ('From: http://www.dotnetpools.com/Article/ArticleDetiail/?articleId=74)
Private Sub dgv_EmployeeTraining_RowPostPaint(sender As Object, e As System.Windows.Forms.DataGridViewRowPostPaintEventArgs)
Handles dgv_EmployeeTraining.RowPostPaint
If e.RowIndex < Me.dgv_EmployeeTraining.RowCount - 1 Then
Dim dgvRow As DataGridViewRow = Me.dgv_EmployeeTraining.Rows(e.RowIndex)
'<== This is the header Name
'If CInt(dgvRow.Cells("EmployeeStatus_Training_e26").Value) <> 2 Then
'<== But this is the name assigned to it in the properties of the control
If CInt(dgvRow.Cells("DataGridViewTextBoxColumn15").Value.ToString) <> 2 Then
dgvRow.DefaultCellStyle.BackColor = Color.FromArgb(236, 236, 255)
Else
dgvRow.DefaultCellStyle.BackColor = Color.LightPink
End If
End If
End Sub
Try the following:
color.gradient <- function(x, colors=c("red","yellow","green"), colsteps=100) {
return( colorRampPalette(colors) (colsteps) [ findInterval(x, seq(min(x),max(x), length.out=colsteps)) ] )
}
x <- c((1:100)^2, (100:1)^2)
plot(x,col=color.gradient(x), pch=19,cex=2)
change your jquery loading setting to onload in jsfiddle . . .it works . . .
Function ExtSql(ByVal sql As String) As Boolean
Dim cnn As SqlConnection
Dim cmd As SqlCommand
cnn = New SqlConnection(My.Settings.mySqlConnectionString)
Try
cnn.Open()
cmd = New SqlCommand
cmd.Connection = cnn
cmd.CommandType = CommandType.Text
cmd.CommandText = sql
cmd.ExecuteNonQuery()
cnn.Close()
cmd.Dispose()
Catch ex As Exception
cnn.Close()
Return False
End Try
Return True
End Function
There is no direct method to draw a triangle.
You can use drawPolygon() method for this.
It takes three parameters in the following form:
drawPolygon(int x[],int y[], int number_of_points);
To draw a triangle:
(Specify the x coordinates in array x and y coordinates in array y and number of points which will be equal to the elements of both the arrays.Like in triangle you will have 3 x coordinates and 3 y coordinates which means you have 3 points in total.)
Suppose you want to draw the triangle using the following points:(100,50),(70,100),(130,100)
Do the following inside public void paint(Graphics g)
:
int x[]={100,70,130};
int y[]={50,100,100};
g.drawPolygon(x,y,3);
Similarly you can draw any shape using as many points as you want.
You're using span6
and span2
. Both of these classes are "float:left
" meaning, if possible they will always try to sit next to each other.
Twitter bootstrap is based on a 12 grid system. So you should generally always get the span**#**
to add up to 12.
E.g.: span4
+ span4
+ span4
OR span6
+ span6
OR span4
+ span3
+ span5
.
To force a span down though, without listening to the previous float you can use twitter bootstraps clearfix
class. To do this, your code should look like this:
<ul class="nav nav-tabs span2">
<li><a href="./index.html"><i class="icon-black icon-music"></i></a></li>
<li><a href="./about.html"><i class="icon-black icon-eye-open"></i></a></li>
<li><a href="./team.html"><i class="icon-black icon-user"></i></a></li>
<li><a href="./contact.html"><i class="icon-black icon-envelope"></i></a></li>
</ul>
<!-- Notice this following line -->
<div class="clearfix"></div>
<div class="well span6">
<h3>I wish this appeared on the next line without having to gratuitously use BR!</h3>
</div>
A parent class should not have knowledge of child classes. You can implement a method calculate()
and override it in every subclass:
class Person {
String name;
void getName(){...}
void calculate();
}
and then
class Student extends Person{
String class;
void getClass(){...}
@Override
void calculate() {
// do something with a Student
}
}
and
class Teacher extends Person{
String experience;
void getExperience(){...}
@Override
void calculate() {
// do something with a Student
}
}
By the way. Your statement about abstract classes is confusing. You can call methods defined in an abstract class, but of course only of instances of subclasses.
In your example you can make Person
abstract and the use getName()
on instanced of Student
and Teacher
.
Two example works for me, for your reference.
Bitmap bitmap = Utils.decodeBase64(base64);
try {
File file = new File(filePath);
FileOutputStream fOut = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.PNG, 85, fOut);
fOut.flush();
fOut.close();
}
catch (Exception e) {
e.printStackTrace();
LOG.i(null, "Save file error!");
return false;
}
and this one
Bitmap savePic = Utils.decodeBase64(base64);
File file = new File(filePath);
File path = new File(file.getParent());
if (savePic != null) {
try {
// build directory
if (file.getParent() != null && !path.isDirectory()) {
path.mkdirs();
}
// output image to file
FileOutputStream fos = new FileOutputStream(filePath);
savePic.compress(Bitmap.CompressFormat.PNG, 90, fos);
fos.close();
ret = true;
} catch (Exception e) {
e.printStackTrace();
}
} else {
LOG.i(TAG, "savePicture image parsing error");
}
Regarding the original code - it appears you want to share data between scopes. To share either Data or State between $scope the docs suggest using a service:
When I used Electron + Angular such order helped me to solve problem
<script src="./assets/js/jquery-3.3.1.min.js"></script>
<script src="./assets/js/jquery-3.3.1.slim.min.js"></script>
<script src="./assets/js/popper.min.js"></script>
<script src="./assets/js/bootstrap.min.js"></script>
import android.content.Intent;
import android.net.Uri;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
public class MainActivity extends AppCompatActivity {
ImageView img;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
img = (ImageView)findViewById(R.id.imageView);
}
public void btn_gallery(View view) {
Intent intent =new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.INTERNAL_CONTENT_URI);
startActivityForResult(intent,100);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode==100 && resultCode==RESULT_OK)
{
Uri uri = data.getData();
img.setImageURI(uri);
}
}
}
It looks like your Spring component scan Base is missing UserServiceImpl
<context:component-scan base-package="org.assessme.com.controller." />
I'm going to put this in here more for completeness than direct relevance to the OP. I spent nearly a day debugging an HttpClient
request, wondering why I was never getting back a response.
Finally found that I had forgotten to await
the async
call further down the call stack.
Feels about as good as missing a semicolon.
I think this is what you want, I already tested this code and works
The tools used are: (all these tools can be downloaded as Nuget packages)
http://fluentassertions.codeplex.com/
http://autofixture.codeplex.com/
https://nuget.org/packages/AutoFixture.AutoMoq
var fixture = new Fixture().Customize(new AutoMoqCustomization());
var myInterface = fixture.Freeze<Mock<IFileConnection>>();
var sut = fixture.CreateAnonymous<Transfer>();
myInterface.Setup(x => x.Get(It.IsAny<string>(), It.IsAny<string>()))
.Throws<System.IO.IOException>();
sut.Invoking(x =>
x.TransferFiles(
myInterface.Object,
It.IsAny<string>(),
It.IsAny<string>()
))
.ShouldThrow<System.IO.IOException>();
Edited:
Let me explain:
When you write a test, you must know exactly what you want to test, this is called: "subject under test (SUT)", if my understanding is correctly, in this case your SUT is: Transfer
So with this in mind, you should not mock your SUT, if you substitute your SUT, then you wouldn't be actually testing the real code
When your SUT has external dependencies (very common) then you need to substitute them in order to test in isolation your SUT. When I say substitute I'm referring to use a mock, dummy, mock, etc depending on your needs
In this case your external dependency is IFileConnection
so you need to create mock for this dependency and configure it to throw the exception, then just call your SUT real method and assert your method handles the exception as expected
var fixture = new Fixture().Customize(new AutoMoqCustomization());
: This linie initializes a new Fixture object (Autofixture library), this object is used to create SUT's without having to explicitly have to worry about the constructor parameters, since they are created automatically or mocked, in this case using Moq
var myInterface = fixture.Freeze<Mock<IFileConnection>>();
: This freezes the IFileConnection
dependency. Freeze means that Autofixture will use always this dependency when asked, like a singleton for simplicity. But the interesting part is that we are creating a Mock of this dependency, you can use all the Moq methods, since this is a simple Moq object
var sut = fixture.CreateAnonymous<Transfer>();
: Here AutoFixture is creating the SUT for us
myInterface.Setup(x => x.Get(It.IsAny<string>(), It.IsAny<string>())).Throws<System.IO.IOException>();
Here you are configuring the dependency to throw an exception whenever the Get
method is called, the rest of the methods from this interface are not being configured, therefore if you try to access them you will get an unexpected exception
sut.Invoking(x => x.TransferFiles(myInterface.Object, It.IsAny<string>(), It.IsAny<string>())).ShouldThrow<System.IO.IOException>();
: And finally, the time to test your SUT, this line uses the FluenAssertions library, and it just calls the TransferFiles
real method from the SUT and as parameters it receives the mocked IFileConnection
so whenever you call the IFileConnection.Get
in the normal flow of your SUT TransferFiles
method, the mocked object will be invoking throwing the configured exception and this is the time to assert that your SUT is handling correctly the exception, in this case, I am just assuring that the exception was thrown by using the ShouldThrow<System.IO.IOException>()
(from the FluentAssertions library)
References recommended:
http://martinfowler.com/articles/mocksArentStubs.html
http://misko.hevery.com/code-reviewers-guide/
http://misko.hevery.com/presentations/
http://www.youtube.com/watch?v=wEhu57pih5w&feature=player_embedded
http://www.youtube.com/watch?v=RlfLCWKxHJ0&feature=player_embedded
You need to tell the run to wait until the process is finished. Something like:
const DontWaitUntilFinished = false, ShowWindow = 1, DontShowWindow = 0, WaitUntilFinished = true
set oShell = WScript.CreateObject("WScript.Shell")
command = "cmd /c C:\windows\system32\wscript.exe <path>\myScript.vbs " & args
oShell.Run command, DontShowWindow, WaitUntilFinished
In the script itself, start Excel like so. While debugging start visible:
File = "c:\test\myfile.xls"
oShell.run """C:\Program Files\Microsoft Office\Office14\EXCEL.EXE"" " & File, 1, true
Are you sure you are adding the correct user? Have you checked to see which user is set for your applications app pool?
This error will also happen if it cannot read the file for some reason; such as the file is locked or used by another application. Since this is an ASP.NET web application you will want to make sure you are not performing any actions that would require the file to be locked; unless you can guarantee you will only have one user on your page at a time.
Can you post an example of how you access the file? What type of file is it? Code snippets will help you get a more exact answer.
for(var i = 0; i < BoardMessages.length;i++){
(function(j){
console.log("Loading message %d".green, j);
htmlMessageboardString += MessageToHTMLString(BoardMessages[j]);
})(i);
}
That should work; however, you should never create a function in a loop. Therefore,
for(var i = 0; i < BoardMessages.length;i++){
composeMessage(BoardMessages[i]);
}
function composeMessage(message){
console.log("Loading message %d".green, message);
htmlMessageboardString += MessageToHTMLString(message);
}
Way late to this post, but I've got something slightly different to say...
>> "Are email addresses case sensitive?"
Well, "It Depends..." (TM)
Some organizations actually think that's a good idea and their email servers enforce case sensitivity.
So, for those crazy places, "Yes, Emails are case sensitive."
Note: Just because a specification says you can do something does not mean it is a good idea to do so.
The principle of KISS suggests that our systems use case insensitive emails.
Whereas the Robustness principle suggests that we accept case sensitive emails.
Solution:
This would mean that if this email already exists: [email protected]
... and another user comes along and wants to use this email: [email protected]
... that our case insensitive searching logic would return a "That email already exists" error message.
Now, you have a decision to make: Is that solution adequate in your case?
If not, you could charge a convenience fee to those clients that demand support for their case sensitive emails and implement custom logic that allows the [email protected] into your system, even if [email protected] already exists.
In which case your email search/validation logic might look like something this pseudocode:
if (user.paidEmailFee) {
// case sensitive email
query = "select * from users where email LIKE ' + user.email + '"
} else {
// case insensitive email
query = "select * from users where email ILIKE ' + user.email + '"
}
This way, you are mostly enforcing case insensitivity but allowing customers to pay for this support if they are using email systems that support such nonsense.
p.s. ILIKE is a PostgreSQL keyword: http://www.postgresql.org/docs/9.2/static/functions-matching.html
your str_carSql should be exactly like this:
str_carSql = "insert into members_car (car_id, member_id, model, color, chassis_id, plate_number, code) values (@id,@m_id,@model,@color,@ch_id,@pt_num,@code)"
Good Luck
// Require body-parser (to receive post data from clients)
var bodyParser = require('body-parser');
app.use(bodyParser.urlencoded({ extended: false }))
// parse application/json
app.use(bodyParser.json())
Not sure if that's exactly what are you looking for, but I did single/double taps without gesture recognizers. I'm using it in a UITableView, so I used that code in the didSelectRowAtIndexPath method
tapCount++;
switch (tapCount)
{
case 1: //single tap
[self performSelector:@selector(singleTap:) withObject: indexPath afterDelay: 0.2];
break;
case 2: //double tap
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(singleTap:) object:indexPath];
[self performSelector:@selector(doubleTap:) withObject: indexPath];
break;
default:
break;
}
if (tapCount>2) tapCount=0;
Methods singleTap and doubleTap are just void with NSIndexPath as a parameter:
- (void)singleTap:(NSIndexPath *)indexPath {
//do your stuff for a single tap
}
- (void)doubleTap:(NSIndexPath *)indexPath {
//do your stuff for a double tap
}
Hope it helps
Here is a good solution for checking connectivity using Swift, without using Reachability. I found it on this blog.
Create a new Swift file in your project called Network.swift
(for example). Paste this code inside that file:
import Foundation
public class Network {
class func isConnectedToNetwork()->Bool{
var Status:Bool = false
let url = NSURL(string: "http://google.com/")
let request = NSMutableURLRequest(URL: url!)
request.HTTPMethod = "HEAD"
request.cachePolicy = NSURLRequestCachePolicy.ReloadIgnoringLocalAndRemoteCacheData
request.timeoutInterval = 10.0
var response: NSURLResponse?
var data = NSURLConnection.sendSynchronousRequest(request, returningResponse: &response, error: nil) as NSData?
if let httpResponse = response as? NSHTTPURLResponse {
if httpResponse.statusCode == 200 {
Status = true
}
}
return Status
}
}
You can then check for connectivity anywhere in your project by using:
if Network.isConnectedToNetwork() == true {
println("Internet connection OK")
} else {
println("Internet connection FAILED")
}
Is Java smart enough to skip checking bool2 and bool2 if bool1 was evaluated to false?
Its not a matter of being smart, its a requirement specified in the language. Otherwise you couldn't write expressions like.
if(s != null && s.length() > 0)
or
if(s == null || s.length() == 0)
BTW if you use &
and |
it will always evaluate both sides of the expression.
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (requestCode == CAMERE_REQUEST && resultCode == RESULT_OK && data != null)
{
Bitmap photo = (Bitmap) data.getExtras().get("data");
imageView.setImageBitmap(photo);
}
}
You can check if the resultCode equals RESULT_OK this will only be the case if a picture is taken and selected and everything worked. This if clause here should check every condition.
??!
is a trigraph that translates to |
. So it says:
!ErrorHasOccured() || HandleError();
which, due to short circuiting, is equivalent to:
if (ErrorHasOccured())
HandleError();
Guru of the Week (deals with C++ but relevant here), where I picked this up.
Possible origin of trigraphs or as @DwB points out in the comments it's more likely due to EBCDIC being difficult (again). This discussion on the IBM developerworks board seems to support that theory.
From ISO/IEC 9899:1999 §5.2.1.1, footnote 12 (h/t @Random832):
The trigraph sequences enable the input of characters that are not defined in the Invariant Code Set as described in ISO/IEC 646, which is a subset of the seven-bit US ASCII code set.
I solved this problem by using the the data-cache="false" attribute in the page div on the pages I wanted refreshed.
<div data-role="page" data-cache="false">
/*content goes here*/
</div>
In my case it was my shopping cart. If a customer added an item to their cart and then continued shopping and then added another item to their cart the cart page would not show the new item. Unless they refreshed the page. Setting data-cache to false instructs JQM not to cache that page as far as I understand.
Hope this helps others in the future.
I use the solution proposed by Basarat but I also need to overwrite the port because I used to have 2 different ports for HTTP and HTTPS protocols.
res.writeHead(301, { "Location": "https://" + req.headers['host'].replace(http_port,https_port) + req.url });
I prefer also to use not standard port so to start nodejs without root privileges. I like 8080 and 8443 because I came from lots of years of programming on tomcat.
My complete file become
var fs = require('fs');
var http = require('http');
var http_port = process.env.PORT || 8080;
var app = require('express')();
// HTTPS definitions
var https = require('https');
var https_port = process.env.PORT_HTTPS || 8443;
var options = {
key : fs.readFileSync('server.key'),
cert : fs.readFileSync('server.crt')
};
app.get('/', function (req, res) {
res.send('Hello World!');
});
https.createServer(options, app).listen(https_port, function () {
console.log('Magic happens on port ' + https_port);
});
// Redirect from http port to https
http.createServer(function (req, res) {
res.writeHead(301, { "Location": "https://" + req.headers['host'].replace(http_port,https_port) + req.url });
console.log("http request, will go to >> ");
console.log("https://" + req.headers['host'].replace(http_port,https_port) + req.url );
res.end();
}).listen(http_port);
Then I use iptable for forwording 80 and 443 traffic on my HTTP and HTTPS ports.
sudo iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8080
sudo iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 443 -j REDIRECT --to-port 8443
In Java you can't. Interface has to do with methods and signature, it does not have to do with the internal state of an object -- that is an implementation question. And this makes sense too -- I mean, simply because certain attributes exist, it does not mean that they have to be used by the implementing class. getHeight could actually point to the width variable (assuming that the implementer is a sadist).
(As a note -- this is not true of all languages, ActionScript allows for declaration of pseudo attributes, and I believe C# does too)
There's no way to guarantee that two functions will execute in sync with each other which seems to be what you want to do.
The best you can do is to split up the function into several steps, then wait for both to finish at critical synchronization points using Process.join
like @aix's answer mentions.
This is better than time.sleep(10)
because you can't guarantee exact timings. With explicitly waiting, you're saying that the functions must be done executing that step before moving to the next, instead of assuming it will be done within 10ms which isn't guaranteed based on what else is going on on the machine.
Add this below lines in style of the full screen dialog.
<item name="android:windowNoTitle">true</item>
<item name="android:windowFullscreen">true</item>
<item name="android:windowIsFloating">false</item>
Jason,
This is how it works.
Localnamespace - java:comp/env is a local name space used by the application. The name that you use in it jdbc/db is just an alias. It does not refer to a physical resource.
During deployment this alias should be mapped to a physical resource (in your case a data source) that is defined on the WAS/WPS run time.
This is actually stored in ejb-bnd.xmi files. In the latest versions the XMIs are replaced with XML files. These files are referred to as the Binding files.
HTH Manglu
Use:
navigateUpTo(new Intent(this, MainActivity.class));
It works starting from API level 16 (4.1), I believe.
The root of your problem is located here:
unregisterReceiver(batteryNotifyReceiver);
If the receiver was already unregistered (probably in the code that you didn't include in this post) or was not registered, then call to unregisterReceiver
throws IllegalArgumentException
. In your case you need to just put special try/catch for this exception and ignore it (assuming you can't or don't want to control number of times you call unregisterReceiver
on the same recevier).
If you insist on having this trivial function in pure batch I suggest this:
@echo off
set x=somestring
set n=0
set m=255
:loop
if "!x:~%m%,1!" == "" (
set /a "m>>=1"
goto loop
) else (
set /a n+=%m%+1
set x=!x:~%m%!
set x=!x:~1!
if not "!x!" == "" goto loop
)
echo %n%
PS. You must have delayed variable expansion enabled to run this.
EDIT. Now I have made an improved version:
@echo off
set x=somestring
set n=0
for %%m in (4095 2047 1023 511 255 127 63 31 15 7 3 1 0) do (
if not "!x:~%%m,1!" == "" (
set /a n+=%%m+1
set x=!x:~%%m!
set x=!x:~1!
if "!x!" == "" goto done
)
)
:done
echo %n%
EDIT2. If you have a C compiler or something on your system you can create the programs you need and miss on the fly if they don't exist. This method is very general. Take string length as an example:
@echo off
set x=somestring
if exist strlen.exe goto comp
echo #include "string.h" > strlen.c
echo int main(int argc, char* argv[]) { return strlen(argv[1]); } >> strlen.c
CL strlen.c
:comp
strlen "%x%"
set n=%errorlevel%
echo %n%
You have to set up PATH, INCLUDE and LIB appropriately. This too can be done on the fly from the batch script. Even if you don't know whether you've got a compiler or don't know where it is you can search for it in your script.
You should remove the references to it by assigning null or leaving the block where it was declared. After that, it will be automatically deleted by the garbage collector (not immediately, but eventually).
Example 1:
Object a = new Object();
a = null; // after this, if there is no reference to the object,
// it will be deleted by the garbage collector
Example 2:
if (something) {
Object o = new Object();
} // as you leave the block, the reference is deleted.
// Later on, the garbage collector will delete the object itself.
Not something that you are currently looking for, but FYI: you can invoke the garbage collector with the call System.gc()
This is an old answer with deprecated and hacky way of overcoming some specific content resolver pain points. Take it with some huge grains of salt and use the proper openInputStream API if at all possible.
You can use the Content Resolver to get a file://
path from the content://
URI:
String filePath = null;
Uri _uri = data.getData();
Log.d("","URI = "+ _uri);
if (_uri != null && "content".equals(_uri.getScheme())) {
Cursor cursor = this.getContentResolver().query(_uri, new String[] { android.provider.MediaStore.Images.ImageColumns.DATA }, null, null, null);
cursor.moveToFirst();
filePath = cursor.getString(0);
cursor.close();
} else {
filePath = _uri.getPath();
}
Log.d("","Chosen path = "+ filePath);
Unless you're trying to upload the file using ajax, just submit the form to /upload/image
.
<form enctype="multipart/form-data" action="/upload/image" method="post">
<input id="image-file" type="file" />
</form>
If you do want to upload the image in the background (e.g. without submitting the whole form), you can use ajax:
I ran into this problem today and wanted to share my solution. In my case, the solution was to delete the Child items before getting the Parent from the database.
Previously I was doing it like in the code below. I will then get the same error listed in this question.
var Parent = GetParent(parentId);
var children = Parent.Children;
foreach (var c in children )
{
Context.Children.Remove(c);
}
Context.SaveChanges();
What worked for me, is to get the children items first, using the parentId (foreign key) and then delete those items. Then I can get the Parent from the database and at that point, it should not have any children items anymore and I can add new children items.
var children = GetChildren(parentId);
foreach (var c in children )
{
Context.Children.Remove(c);
}
Context.SaveChanges();
var Parent = GetParent(parentId);
Parent.Children = //assign new entities/items here
Here is an updated answer for iOS7+. It uses NSURLSession, the new hotness. Disclaimer, this is untested and was written in a text field:
- (void)post {
NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:nil];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"https://example.com/dontposthere"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
// Uncomment the following two lines if you're using JSON like I imagine many people are (the person who is asking specified plain text)
// [request addValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
// [request addValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setHTTPMethod:@"POST"];
NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
}];
[postDataTask resume];
}
-(void)URLSession:(NSURLSession *)session didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)( NSURLSessionAuthChallengeDisposition disposition, NSURLCredential *credential))completionHandler {
completionHandler(NSURLSessionAuthChallengeUseCredential, [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust]);
}
Or better yet, use AFNetworking 2.0+. Usually I would subclass AFHTTPSessionManager, but I'm putting this all in one method to have a concise example.
- (void)post {
AFHTTPSessionManager *manager = [[AFHTTPSessionManager alloc] initWithBaseURL:[NSURL URLWithString:@"https://example.com"]];
// Many people will probably want [AFJSONRequestSerializer serializer];
manager.requestSerializer = [AFHTTPRequestSerializer serializer];
// Many people will probably want [AFJSONResponseSerializer serializer];
manager.responseSerializer = [AFHTTPRequestSerializer serializer];
manager.securityPolicy.allowInvalidCertificates = NO; // Some servers require this to be YES, but default is NO.
[manager.requestSerializer setAuthorizationHeaderFieldWithUsername:@"username" password:@"password"];
[[manager POST:@"dontposthere" parameters:nil success:^(NSURLSessionDataTask *task, id responseObject) {
NSString *responseString = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
} failure:^(NSURLSessionDataTask *task, NSError *error) {
NSLog(@"darn it");
}] resume];
}
If you are using the JSON response serializer, the responseObject will be object from the JSON response (often NSDictionary or NSArray).
Today this also happened to me. The function name maybe conflicts with keywords. My case is scrape()
. I change the function name, everything works fine.
If the main problem is the loss of precision when converting from a float to a string, one possible way to go is to convert the floats to the decimal
S: http://docs.python.org/library/decimal.html.
In python 2.7 and higher you can directly convert a float to a decimal
object.
In Kotlin simply put your code in runOnUiThread activity method
runOnUiThread{
// write your code here, for example
val task = Runnable {
Handler().postDelayed({
var smzHtcList = mDb?.smzHtcReferralDao()?.getAll()
tv_showSmzHtcList.text = smzHtcList.toString()
}, 10)
}
mDbWorkerThread.postTask(task)
}
Please check if you have already close the database connection or not. In my case i was getting the error because the connection was close in upper line.
You can run nodejs using pm2 if you want to manage each microservice means and run it. Node will be running in a port right just configure that port in nginx(/etc/nginx/sites-enabled/domain.com)
server{
listen 80;
server_name domain.com www.domain.com;
location / {
return 403;
}
location /url {
proxy_pass http://localhost:51967/info;
}
}
Check whether localhost is running or not by using ping.
And
Create one single Node.js server which handles all Node.js requests. This reads the requested files and evals their contents. So the files are interpreted on each request, but the server logic is much simpler.
This is best and as you said easier too
This is a way to invoke one or more JavaScript methods from the code behind. By using Script Manager we can call the methods in sequence. Consider the below code for example.
ScriptManager.RegisterStartupScript(this, typeof(Page), "UpdateMsg",
"$(document).ready(function(){EnableControls();
alert('Overrides successfully Updated.');
DisableControls();});",
true);
In this first method EnableControls() is invoked. Next the alert will be displayed. Next the DisableControls() method will be invoked.
example:
XML
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="country.xsl"?>
<country xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="country.xsd">
<countryName>Australia</countryName>
<capital>Canberra</capital>
<nationalLanguage>English</nationalLanguage>
<population>21000000</population>
<currency>Australian Dollar</currency>
<nationalIdentities>
<nationalAnthem>Advance Australia Fair</nationalAnthem>
<nationalDay>Australia Day (26 January)</nationalDay>
<nationalColour>Green and Gold</nationalColour>
<nationalGemstone>Opal</nationalGemstone>
<nationalFlower>Wattle (Acacia pycnantha)</nationalFlower>
</nationalIdentities>
<publicHolidays>
<newYearDay>1 January</newYearDay>
<australiaDay>26 January</australiaDay>
<anzacDay>25 April</anzacDay>
<christmasDay>25 December</christmasDay>
<boxingDay>26 December</boxingDay>
<laborDay>Variable Date</laborDay>
<easter>Variable Date</easter>
<queenBirthDay>21 April (Variable Date)</queenBirthDay>
</publicHolidays>
<states>
<stateName><Name>NSW - New South Wales</Name></stateName>
<stateName><Name>VIC - Victoria</Name></stateName>
<stateName><Name>QLD - Queensland</Name></stateName>
<stateName><Name>SA - South Australia</Name></stateName>
<stateName><Name>WA - Western Australia</Name></stateName>
<stateName><Name>TAS - Tasmania</Name></stateName>
</states>
<territories>
<territoryName>ACT - Australian Capital Territory</territoryName>
<territoryName>NT - Northern Territory</territoryName>
</territories>
</country>
XSD:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="country">
<xs:complexType>
<xs:sequence>
<xs:element name="countryName" type="xs:string"/>
<xs:element name="capital" type="xs:string"/>
<xs:element name="nationalLanguage" type="xs:string"/>
<xs:element name="population" type="xs:double"/>
<xs:element name="currency" type="xs:string"/>
<xs:element name="nationalIdentities">
<xs:complexType>
<xs:sequence>
<xs:element name="nationalAnthem" type="xs:string"/>
<xs:element name="nationalDay" type="xs:string"/>
<xs:element name="nationalColour" type="xs:string"/>
<xs:element name="nationalGemstone" type="xs:string"/>
<xs:element name="nationalFlower" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="publicHolidays">
<xs:complexType>
<xs:sequence>
<xs:element name="newYearDay" maxOccurs="1" type="xs:string"/>
<xs:element name="australiaDay" maxOccurs="1" type="xs:string"/>
<xs:element name="anzacDay" maxOccurs="1" type="xs:string"/>
<xs:element name="christmasDay" maxOccurs="1" type="xs:string"/>
<xs:element name="boxingDay" maxOccurs="1" type="xs:string"/>
<xs:element name="laborDay" maxOccurs="1" type="xs:string"/>
<xs:element name="easter" maxOccurs="1" type="xs:string"/>
<xs:element name="queenBirthDay" maxOccurs="1" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="states">
<xs:complexType>
<xs:sequence>
<xs:element name="stateName" minOccurs="1" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence>
<xs:element name="Name" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="territories">
<xs:complexType>
<xs:sequence>
<xs:element name="territoryName" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
XSL:
<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:output method="html" indent="yes" version="4.0"/>
<xsl:template match="/">
<html>
<body>
<xsl:for-each select="country">
<xsl:value-of select="countryName"/><br/>
<xsl:value-of select="capital"/><br/>
<xsl:value-of select="nationalLanguage"/><br/>
<xsl:value-of select="population"/><br/>
<xsl:value-of select="currency"/><br/>
<xsl:for-each select="nationalIdentities">
<xsl:value-of select="nationalAnthem"/><br/>
<xsl:value-of select="nationalDay"/><br/>
<xsl:value-of select="nationalColour"/><br/>
<xsl:value-of select="nationalGemstone"/><br/>
<xsl:value-of select="nationalFlower"/><br/>
</xsl:for-each>
<xsl:for-each select="publicHolidays">
<xsl:value-of select="newYearDay"/><br/>
<xsl:value-of select="australiaDay"/><br/>
<xsl:value-of select="anzacDay"/><br/>
<xsl:value-of select="christmasDay"/><br/>
<xsl:value-of select="boxingDay"/><br/>
<xsl:value-of select="laborDay"/><br/>
<xsl:value-of select="easter"/><br/>
<xsl:value-of select="queenBirthDay"/><br/>
</xsl:for-each>
<xsl:for-each select="states/stateName">
<xsl:value-of select="Name"/><br/>
</xsl:for-each>
</xsl:for-each>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
Result:
Australia
Canberra
English
21000000
Australian Dollar
Advance Australia Fair
Australia Day (26 January)
Green and Gold
Opal
Wattle (Acacia pycnantha)
1 January
26 January
25 April
25 December
26 December
Variable Date
Variable Date
21 April (Variable Date)
NSW - New South Wales
VIC - Victoria
QLD - Queensland
SA - South Australia
WA - Western Australia
TAS - Tasmania
It's definitely not a problem with propeties file not being found, since in that case another exception is thrown.
Make sure that you actually have a value with key idm.url
in your idm.properties
.
Well, longs can't hold anything but integers.
One option is to use a float: float('234.89')
The other option is to truncate or round. Converting from a float to a long will truncate for you: long(float('234.89'))
>>> long(float('1.1'))
1L
>>> long(float('1.9'))
1L
>>> long(round(float('1.1')))
1L
>>> long(round(float('1.9')))
2L
compiler could optimize memcpy, for example:
int x;
memcpy(&x, some_pointer, sizeof(int));
This memcpy may be optimized as: x = *(int*)some_pointer;
Here is a more effective way of doing this:
Just call the following function with your 'weights' array (assuming the indices as the corresponding items) and the no. of samples needed. This function can be easily modified to handle ordered pair.
Returns indexes (or items) sampled/picked (with replacement) using their respective probabilities:
def resample(weights, n):
beta = 0
# Caveat: Assign max weight to max*2 for best results
max_w = max(weights)*2
# Pick an item uniformly at random, to start with
current_item = random.randint(0,n-1)
result = []
for i in range(n):
beta += random.uniform(0,max_w)
while weights[current_item] < beta:
beta -= weights[current_item]
current_item = (current_item + 1) % n # cyclic
else:
result.append(current_item)
return result
A short note on the concept used in the while loop. We reduce the current item's weight from cumulative beta, which is a cumulative value constructed uniformly at random, and increment current index in order to find the item, the weight of which matches the value of beta.
This error can also happen if the server only sends its leaf certificate and does not send all the chain certificates needed to build the trust chain to the root CA. Unfortunately this is a common misconfiguration of servers.
Most browsers work around this problem if they already know the missing chain certificate from earlier visits or maybe download the missing certificate if the leaf certificate contains a URL for CA issuers in Authority Information Access (AIA). But this behavior is usually restricted to desktop browsers and other tools simply fail because they cannot build the trust chain.
You can make the JRE to automatically download the intermediate certificate by setting com.sun.security.enableAIAcaIssuers
to true
To verify if the server is sending all the chain certificates you can enter the host in the following SSL certificate validation tool https://www.digicert.com/help/
define MOD(a, b) ((((a)%(b))+(b))%(b))
The only way to be 100% sure the same form never gets submitted twice is to embed a unique identifier in each one you issue and track which ones have been submitted at the server. The pitfall there is that if the user backs up to the page where the form was and enters new data, the same form won't work.
Hmm... what's different this time? http://jsfiddle.net/fdsaP/2/
Renders in Chrome fine. Do you need it cross-browser? It really helps being specific.
EDIT: Youtube renders the object
and embed
with no explicit wmode set, meaning it defaults to "window" which means it overlays everything. You need to either:
a) Host the page that contains the object/embed code yourself and add wmode="transparent" param element to object and attribute to embed if you choose to serve both elements
b) Find a way for youtube to specify those.
It is hard to give a sensible solution since you are keen to avoid all sane approaches. Refactoring one line of code is the senible solution.
Note: Using -Xss sets the stack size of every thread and is a very bad idea.
Another approach is byte code manipulation to change the code as follows;
public static long fact(int n) {
return n < 2 ? n : n > 127 ? 0 : n * fact(n - 1);
}
given every answer for n > 127 is 0. This avoid changing the source code.
If you're in the context of an MVC Controller or View you can use the UrlHelper which should be accessible via just Url
Url.Content("~/content/images/myimage.jpg")
Which will be fully expanded to /virtual_directoryname/content/images/myimage.jpg
This can be used in a controller or .cshtml file
Yes it is a little odd that it's called Content
but it's meant to be used to get an absolute path to a resource so it makes sense
"Knowing about sites which handles such massive traffic gives lots of pointers for architects etc. to keep in mind certain stuff while designing new sites"
I think you can probably learn a lot from the design of Facebook, just as you can from the design of any successful large software system. However, it seems to me that you should not keep the current design of Facebook in mind when designing new systems.
Why do you want to be able to handle the traffic that Facebook has to handle? Odds are that you will never have to, no matter how talented a programmer you may be. Facebook itself was not designed from the start for such massive scalability, which is perhaps the most important lesson to learn from it.
If you want to learn about a non-trivial software system I can recommend the book "Dissecting a C# Application" about the development of the SharpDevelop IDE. It is out of print, but it is available for free online. The book gives you a glimpse into a real application and provides insights about IDEs which are useful for a programmer.
Python's csv module handles data row-wise, which is the usual way of looking at such data. You seem to want a column-wise approach. Here's one way of doing it.
Assuming your file is named myclone.csv
and contains
workers,constant,age
w0,7.334,-1.406
w1,5.235,-4.936
w2,3.2225,-1.478
w3,0,0
this code should give you an idea or two:
>>> import csv
>>> f = open('myclone.csv', 'rb')
>>> reader = csv.reader(f)
>>> headers = next(reader, None)
>>> headers
['workers', 'constant', 'age']
>>> column = {}
>>> for h in headers:
... column[h] = []
...
>>> column
{'workers': [], 'constant': [], 'age': []}
>>> for row in reader:
... for h, v in zip(headers, row):
... column[h].append(v)
...
>>> column
{'workers': ['w0', 'w1', 'w2', 'w3'], 'constant': ['7.334', '5.235', '3.2225', '0'], 'age': ['-1.406', '-4.936', '-1.478', '0']}
>>> column['workers']
['w0', 'w1', 'w2', 'w3']
>>> column['constant']
['7.334', '5.235', '3.2225', '0']
>>> column['age']
['-1.406', '-4.936', '-1.478', '0']
>>>
To get your numeric values into floats, add this
converters = [str.strip] + [float] * (len(headers) - 1)
up front, and do this
for h, v, conv in zip(headers, row, converters):
column[h].append(conv(v))
for each row instead of the similar two lines above.
Advantages of a PreparedStatement
:
Precompilation and DB-side caching of the SQL statement leads to overall faster execution and the ability to reuse the same SQL statement in batches.
Automatic prevention of SQL injection attacks by builtin escaping of quotes and other special characters. Note that this requires that you use any of the PreparedStatement
setXxx()
methods to set the values
preparedStatement = connection.prepareStatement("INSERT INTO Person (name, email, birthdate, photo) VALUES (?, ?, ?, ?)");
preparedStatement.setString(1, person.getName());
preparedStatement.setString(2, person.getEmail());
preparedStatement.setTimestamp(3, new Timestamp(person.getBirthdate().getTime()));
preparedStatement.setBinaryStream(4, person.getPhoto());
preparedStatement.executeUpdate();
and thus don't inline the values in the SQL string by string-concatenating.
preparedStatement = connection.prepareStatement("INSERT INTO Person (name, email) VALUES ('" + person.getName() + "', '" + person.getEmail() + "'");
preparedStatement.executeUpdate();
Eases setting of non-standard Java objects in a SQL string, e.g. Date
, Time
, Timestamp
, BigDecimal
, InputStream
(Blob
) and Reader
(Clob
). On most of those types you can't "just" do a toString()
as you would do in a simple Statement
. You could even refactor it all to using PreparedStatement#setObject()
inside a loop as demonstrated in the utility method below:
public static void setValues(PreparedStatement preparedStatement, Object... values) throws SQLException {
for (int i = 0; i < values.length; i++) {
preparedStatement.setObject(i + 1, values[i]);
}
}
Which can be used as below:
preparedStatement = connection.prepareStatement("INSERT INTO Person (name, email, birthdate, photo) VALUES (?, ?, ?, ?)");
setValues(preparedStatement, person.getName(), person.getEmail(), new Timestamp(person.getBirthdate().getTime()), person.getPhoto());
preparedStatement.executeUpdate();
I think you are confusing objects and classes. A class inside a class looks like this:
class Foo(object):
class Bar(object):
pass
>>> foo = Foo()
>>> bar = Foo.Bar()
But it doesn't look to me like that's what you want. Perhaps you are after a simple containment hierarchy:
class Player(object):
def __init__(self, ... airplanes ...) # airplanes is a list of Airplane objects
...
self.airplanes = airplanes
...
class Airplane(object):
def __init__(self, ... flights ...) # flights is a list of Flight objects
...
self.flights = flights
...
class Flight(object):
def __init__(self, ... duration ...)
...
self.duration = duration
...
Then you can build and use the objects thus:
player = Player(...[
Airplane(... [
Flight(...duration=10...),
Flight(...duration=15...),
] ... ),
Airplane(...[
Flight(...duration=20...),
Flight(...duration=11...),
Flight(...duration=25...),
]...),
])
player.airplanes[5].flights[6].duration = 5
You can try using jquery.pep.js:
jquery.pep.js is a lightweight jQuery plugin which turns any DOM element into a draggable object. It works across mostly all browsers, from old to new, from touch to click. I built it to serve a need in which jQuery UI’s draggable was not fulfilling, since it didn’t work on touch devices (without some hackery).
Use KeyDown Event instead of KeyPress
If e.KeyCode = Keys.Enter Then
MsgBox ("You pressed enter")
End if
Note: Make sure you don't have ACCEPT BUTTON set on your form. AcceptButton set it to 'none'
Here's another way to do it, which seems to work well.
Set the meta tag to restrict the viewport to scale=1, which prevents zooming:
< meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1">
With javascript, change the meta tag 1/2 second later to allow zooming:
setTimeout(function(){ document.querySelector("meta[name=viewport]").setAttribute('content','width=device-width, initial-scale=1');}, 500);
Again with javascript, on orientation change, reload the page:
window.onorientationchange = function(){window.location.reload();};
Every time you reorient the device, the page reloads, initially without zoom. But 1/2 second later, ability to zoom is restored.
Just use look-arounds to solve this:
(?<=^|,)garp(?=$|,)
The difference with look-arounds and just regular groups are that with regular groups the comma would be part of the match, and with look-arounds it wouldn't. In this case it doesn't make a difference though.
Another answer to the OP's exact question is to set the consumes
content type to "text/plain"
and then declare a @RequestBody String
input parameter. This will pass the text of the POST data in as the declared String
variable (postPayload
in the following example).
Of course, this presumes your POST payload is text data (as the OP stated was the case).
Example:
@RequestMapping(value = "/your/url/here", method = RequestMethod.POST, consumes = "text/plain")
public ModelAndView someMethod(@RequestBody String postPayload) {
// ...
}
You can also use synchronized
keyword for addFinisher
method like this
//Implement the one method in the RaceListener interface
public synchronized void addFinisher(RaceCar finisher) {
finishingOrder.add(finisher);
}
So you can use ArrayList add method thread-safe with this way.
great work on this class. Simple and easy to use. I modified the class to include a title in the first row of the export; figured I would share:
use:
CsvExport myExport = new CsvExport();
myExport.addTitle = String.Format("Name: {0},{1}", lastName, firstName));
class:
public class CsvExport
{
List<string> fields = new List<string>();
public string addTitle { get; set; } // string for the first row of the export
List<Dictionary<string, object>> rows = new List<Dictionary<string, object>>();
Dictionary<string, object> currentRow
{
get
{
return rows[rows.Count - 1];
}
}
public object this[string field]
{
set
{
if (!fields.Contains(field)) fields.Add(field);
currentRow[field] = value;
}
}
public void AddRow()
{
rows.Add(new Dictionary<string, object>());
}
string MakeValueCsvFriendly(object value)
{
if (value == null) return "";
if (value is Nullable && ((INullable)value).IsNull) return "";
if (value is DateTime)
{
if (((DateTime)value).TimeOfDay.TotalSeconds == 0)
return ((DateTime)value).ToString("yyyy-MM-dd");
return ((DateTime)value).ToString("yyyy-MM-dd HH:mm:ss");
}
string output = value.ToString();
if (output.Contains(",") || output.Contains("\""))
output = '"' + output.Replace("\"", "\"\"") + '"';
return output;
}
public string Export()
{
StringBuilder sb = new StringBuilder();
// if there is a title
if (!string.IsNullOrEmpty(addTitle))
{
// escape chars that would otherwise break the row / export
char[] csvTokens = new[] { '\"', ',', '\n', '\r' };
if (addTitle.IndexOfAny(csvTokens) >= 0)
{
addTitle = "\"" + addTitle.Replace("\"", "\"\"") + "\"";
}
sb.Append(addTitle).Append(",");
sb.AppendLine();
}
// The header
foreach (string field in fields)
sb.Append(field).Append(",");
sb.AppendLine();
// The rows
foreach (Dictionary<string, object> row in rows)
{
foreach (string field in fields)
sb.Append(MakeValueCsvFriendly(row[field])).Append(",");
sb.AppendLine();
}
return sb.ToString();
}
public void ExportToFile(string path)
{
File.WriteAllText(path, Export());
}
public byte[] ExportToBytes()
{
return Encoding.UTF8.GetBytes(Export());
}
}
Zero is false, nonzero is true.
In php you can test more explicitly using the ===
operator.
if (0==false)
echo "works"; // will echo works
if (0===false)
echo "works"; // will not echo anything
I suppose you want form based authentication using deployment descriptors and j_security_check
.
You can also do this in JSF by just using the same predefinied field names j_username
and j_password
as demonstrated in the tutorial.
E.g.
<form action="j_security_check" method="post">
<h:outputLabel for="j_username" value="Username" />
<h:inputText id="j_username" />
<br />
<h:outputLabel for="j_password" value="Password" />
<h:inputSecret id="j_password" />
<br />
<h:commandButton value="Login" />
</form>
You could do lazy loading in the User
getter to check if the User
is already logged in and if not, then check if the Principal
is present in the request and if so, then get the User
associated with j_username
.
package com.stackoverflow.q2206911;
import java.io.IOException;
import java.security.Principal;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.faces.context.FacesContext;
@ManagedBean
@SessionScoped
public class Auth {
private User user; // The JPA entity.
@EJB
private UserService userService;
public User getUser() {
if (user == null) {
Principal principal = FacesContext.getCurrentInstance().getExternalContext().getUserPrincipal();
if (principal != null) {
user = userService.find(principal.getName()); // Find User by j_username.
}
}
return user;
}
}
The User
is obviously accessible in JSF EL by #{auth.user}
.
To logout do a HttpServletRequest#logout()
(and set User
to null!). You can get a handle of the HttpServletRequest
in JSF by ExternalContext#getRequest()
. You can also just invalidate the session altogether.
public String logout() {
FacesContext.getCurrentInstance().getExternalContext().invalidateSession();
return "login?faces-redirect=true";
}
For the remnant (defining users, roles and constraints in deployment descriptor and realm), just follow the Java EE 6 tutorial and the servletcontainer documentation the usual way.
Update: you can also use the new Servlet 3.0 HttpServletRequest#login()
to do a programmatic login instead of using j_security_check
which may not per-se be reachable by a dispatcher in some servletcontainers. In this case you can use a fullworthy JSF form and a bean with username
and password
properties and a login
method which look like this:
<h:form>
<h:outputLabel for="username" value="Username" />
<h:inputText id="username" value="#{auth.username}" required="true" />
<h:message for="username" />
<br />
<h:outputLabel for="password" value="Password" />
<h:inputSecret id="password" value="#{auth.password}" required="true" />
<h:message for="password" />
<br />
<h:commandButton value="Login" action="#{auth.login}" />
<h:messages globalOnly="true" />
</h:form>
And this view scoped managed bean which also remembers the initially requested page:
@ManagedBean
@ViewScoped
public class Auth {
private String username;
private String password;
private String originalURL;
@PostConstruct
public void init() {
ExternalContext externalContext = FacesContext.getCurrentInstance().getExternalContext();
originalURL = (String) externalContext.getRequestMap().get(RequestDispatcher.FORWARD_REQUEST_URI);
if (originalURL == null) {
originalURL = externalContext.getRequestContextPath() + "/home.xhtml";
} else {
String originalQuery = (String) externalContext.getRequestMap().get(RequestDispatcher.FORWARD_QUERY_STRING);
if (originalQuery != null) {
originalURL += "?" + originalQuery;
}
}
}
@EJB
private UserService userService;
public void login() throws IOException {
FacesContext context = FacesContext.getCurrentInstance();
ExternalContext externalContext = context.getExternalContext();
HttpServletRequest request = (HttpServletRequest) externalContext.getRequest();
try {
request.login(username, password);
User user = userService.find(username, password);
externalContext.getSessionMap().put("user", user);
externalContext.redirect(originalURL);
} catch (ServletException e) {
// Handle unknown username/password in request.login().
context.addMessage(null, new FacesMessage("Unknown login"));
}
}
public void logout() throws IOException {
ExternalContext externalContext = FacesContext.getCurrentInstance().getExternalContext();
externalContext.invalidateSession();
externalContext.redirect(externalContext.getRequestContextPath() + "/login.xhtml");
}
// Getters/setters for username and password.
}
This way the User
is accessible in JSF EL by #{user}
.
import operator
sortedlist = sorted(reader, key=operator.itemgetter(3), reverse=True)
or use lambda
sortedlist = sorted(reader, key=lambda row: row[3], reverse=True)
Answer: (Romain Guy): The user doesn't, the system handles this automatically. That's what the activity lifecycle (especially onPause/onStop/onDestroy) is for. No matter what you do, do not put a "quit" or "exit" application button. It is useless with Android's application model. This is also contrary to how core applications work.
1: Totally exiting an application may be generally unmandatory, but it is not useless. What if windows had no exit option? System would be doggy slow as memory was full and the OS had to guess at which programs you were done with. I don't care what Romain Guy or even Larry Page and Sergey Brin say - these are unquestionable facts: Systems run slower when they have to kill tasks to get their memory before a new app can be launched. You just can't tell me that it doesn't take time to kill an app! Even the light from distant stars take time... There is some use in allowing the user to fully close apps.
2: Contrary to how core applications work? What's that supposed to mean? When I'm done running an app for now, it is no longer doing any work...It's just waiting to be killed by the OS when its memory is needed.
In summary, there is a distinct difference between minimizing and exiting, and neither pinch hits well for the other. Do we leave a screwdriver in every screw? Or a key in every door? Do we leave all of our appliances on high until the breaker blows and we need to turn on another appliance? Do we leave the dish washer full of dishes, and only take out enough each time to make room for some new dirty ones? Do we leave all the cars running in the driveway until -- oh never mind.
If the user wants to minimize an app, then the best thing is to minimize it. If a user wants to exit an app, then by all means it is best to exit.
Is it frowned on? That's Android's view - they frown on it. And many many independent rookie Android developers frown on it.
But when it comes right down to it, there is good coding and bad coding. There is good program flow models and there are bad program flow models.
Leaving programs in memory when the user knows they are done with them simply is not good program flow. It serves absolutely no purpose whatsoever, and it slows things down when launching new apps or when running apps allocate more memory.
It is sort of like your car: There are times when you leave it running, like stopping at a stop light, or perhaps the fast food drive through, or stopping at the ATM. But there are other situations where you do want to shut it off - like when you get to work, or the grocery store or even home.
Similarly, if you're playing a game and the phone rings, yes. Pause the game and keep it running. But if the user is done with the game for a while, then by all means let them exit.
The exit button on some applications should be more out in front than others. Games, for example, or programs where the user is likely to want to fully exit, should have an obvious exit. Other programs, like, perhaps, email programs, where exiting is an unlikely desire (so that it can keep checking for email) -- these programs should not waste prime control input screen space with an exit option, but for good program flow, it should have an exit option. What if someone decides they don't want their mail program trying to check email when they are in poor coverage area, or maybe in a Skype call or whatever? Let them exit the email program if they want!
Suspending and exiting are two vital tasks and neither fulfills the role of the other.
If you have Python version >= 2.7, you can use subprocess.check_output which basically does exactly what you want (it returns standard output as string).
Simple example (linux version, see note):
import subprocess
print subprocess.check_output(["ping", "-c", "1", "8.8.8.8"])
Note that the ping command is using linux notation (-c
for count). If you try this on Windows remember to change it to -n
for same result.
As commented below you can find a more detailed explanation in this other answer.
shutil.copy
and shutil.copy2
are copying files.
shutil.copytree
copies a folder with all the files and all subfolders. shutil.copytree
is using shutil.copy2
to copy the files.
So the analog to cp -r
you are saying is the shutil.copytree
because cp -r
targets and copies a folder and its files/subfolders like shutil.copytree
. Without the -r
cp
copies files like shutil.copy
and shutil.copy2
do.
You mention the user switching between Activities pretty quickly. Could it be that you're calling unbindService
before the service connection has been established? This may have the effect of failing to unbind, then leaking the binding.
Not entirely sure how you could handle this... Perhaps when onServiceConnected
is called you could call unbindService
if onDestroy
has already been called. Not sure if that'll work though.
If you haven't already, you could add an onUnbind method to your service. That way you can see exactly when your classes unbind from it, and it might help with debugging.
@Override
public boolean onUnbind(Intent intent) {
Log.d(this.getClass().getName(), "UNBIND");
return true;
}
V8 is an implementation of JavaScript. It lets you run standalone JavaScript applications (among other things).
Node.js is simply a library written for V8 which does evented I/O. This concept is a bit trickier to explain, and I'm sure someone will answer with a better explanation than I... The gist is that rather than doing some input or output and waiting for it to happen, you just don't wait for it to finish. So for example, ask for the last edited time of a file:
// Pseudo code
stat( 'somefile' )
That might take a couple of milliseconds, or it might take seconds. With evented I/O you simply fire off the request and instead of waiting around you attach a callback that gets run when the request finishes:
// Pseudo code
stat( 'somefile', function( result ) {
// Use the result here
} );
// ...more code here
This makes it a lot like JavaScript code in the browser (for example, with Ajax style functionality).
For more information, you should check out the article Node.js is genuinely exciting which was my introduction to the library/platform... I found it quite good.
I believe the critical thing here is to be consistent within the sphere of your code's visibility, i.e. as long as everyone who needs to look at/work on your code understands your naming convention then that should be fine, even if you decide to call them 'CompanyThingamabob' and 'UserDoohickey'. The first stop, if you work for a company, is to see if there is a company convention for naming. If there isn't or you don't work for a company then create your own using terms that make sense to you, pass it around a few trusted colleagues/friends who at least code casually, and incorporate any feedback that makes sense.
Applying someone else's convention, even when it's widely accepted, if it doesn't leap off the page at you is a bit of a mistake in my book. First and foremost I need to understand my code without reference to other documentation but at the same time it needs to be generic enough that it's no incomprehensible to someone else in the same field in the same industry.
There is no need to use the classpath: protocol in your schemaLocation URL if the namespace is configured correctly and the XSD file is on your classpath.
Spring doc "Registering the handler and the schema" shows how it should be done.
In your case, the problem was probably that the spring-context jar on your classpath was not 2.1. That was why changing the protocol to classpath: and putting the specific 2.1 XSD in your classpath fixed the problem.
From what I've seen, there are 2 schemas defined for the main XSD contained in a spring-* jar. Once to resolve the schema URL with the version and once without it.
As an example see this part of the spring.schemas contents in spring-context-3.0.5.RELEASE.jar:
http\://www.springframework.org/schema/context/spring-context-2.5.xsd=org/springframework/context/config/spring-context-2.5.xsd
http\://www.springframework.org/schema/context/spring-context-3.0.xsd=org/springframework/context/config/spring-context-3.0.xsd
http\://www.springframework.org/schema/context/spring-context.xsd=org/springframework/context/config/spring-context-3.0.xsd
This means that (in xsi:schemaLocation)
http://www.springframework.org/schema/context/spring-context-2.5.xsd
will be validated against
org/springframework/context/config/spring-context-2.5.xsd
in the classpath.
http://www.springframework.org/schema/context/spring-context-3.0.xsd
or
http://www.springframework.org/schema/context/spring-context.xsd
will be validated against
org/springframework/context/config/spring-context-3.0.xsd
in the classpath.
http://www.springframework.org/schema/context/spring-context-2.1.xsd
is not defined so Spring will look for it using the literal URL defined in schemaLocation.
Pretty much what Matt Davis said, with the following additional points:
For me the main differentiator with BackgroundWorker
is the automatic marshalling of the completed event via the SynchronizationContext
. In a UI context this means the completed event fires on the UI thread, and so can be used to update UI. This is a major differentiator if you are using the BackgroundWorker
in a UI context.
Tasks executed via the ThreadPool
cannot be easily cancelled (this includes ThreadPool
. QueueUserWorkItem
and delegates execute asyncronously). So whilst it avoids the overhead of thread spinup, if you need cancellation either use a BackgroundWorker
or (more likely outside of the UI) spin up a thread and keep a reference to it so you can call Abort()
.
The money-back guaranteed, reinforced-concrete-solid way to force a view to draw synchronously (before returning to the calling code) is to configure the CALayer
's interactions with your UIView
subclass.
In your UIView subclass, create a displayNow()
method that tells the layer to “set course for display” then to “make it so”:
Swift
/// Redraws the view's contents immediately.
/// Serves the same purpose as the display method in GLKView.
public func displayNow()
{
let layer = self.layer
layer.setNeedsDisplay()
layer.displayIfNeeded()
}
Objective-C
/// Redraws the view's contents immediately.
/// Serves the same purpose as the display method in GLKView.
- (void)displayNow
{
CALayer *layer = self.layer;
[layer setNeedsDisplay];
[layer displayIfNeeded];
}
Also implement a draw(_: CALayer, in: CGContext)
method that'll call your private/internal drawing method (which works since every UIView
is a CALayerDelegate
):
Swift
/// Called by our CALayer when it wants us to draw
/// (in compliance with the CALayerDelegate protocol).
override func draw(_ layer: CALayer, in context: CGContext)
{
UIGraphicsPushContext(context)
internalDraw(self.bounds)
UIGraphicsPopContext()
}
Objective-C
/// Called by our CALayer when it wants us to draw
/// (in compliance with the CALayerDelegate protocol).
- (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)context
{
UIGraphicsPushContext(context);
[self internalDrawWithRect:self.bounds];
UIGraphicsPopContext();
}
And create your custom internalDraw(_: CGRect)
method, along with fail-safe draw(_: CGRect)
:
Swift
/// Internal drawing method; naming's up to you.
func internalDraw(_ rect: CGRect)
{
// @FILLIN: Custom drawing code goes here.
// (Use `UIGraphicsGetCurrentContext()` where necessary.)
}
/// For compatibility, if something besides our display method asks for draw.
override func draw(_ rect: CGRect) {
internalDraw(rect)
}
Objective-C
/// Internal drawing method; naming's up to you.
- (void)internalDrawWithRect:(CGRect)rect
{
// @FILLIN: Custom drawing code goes here.
// (Use `UIGraphicsGetCurrentContext()` where necessary.)
}
/// For compatibility, if something besides our display method asks for draw.
- (void)drawRect:(CGRect)rect {
[self internalDrawWithRect:rect];
}
And now just call myView.displayNow()
whenever you really-really need it to draw (such as from a CADisplayLink
callback). Our displayNow()
method will tell the CALayer
to displayIfNeeded()
, which will synchronously call back into our draw(_:,in:)
and do the drawing in internalDraw(_:)
, updating the visual with what's drawn into the context before moving on.
This approach is similar to @RobNapier's above, but has the advantage of calling displayIfNeeded()
in addition to setNeedsDisplay()
, which makes it synchronous.
This is possible because CALayer
s expose more drawing functionality than UIView
s do— layers are lower-level than views and designed explicitly for the purpose of highly-configurable drawing within the layout, and (like many things in Cocoa) are designed to be used flexibly (as a parent class, or as a delegator, or as a bridge to other drawing systems, or just on their own). Proper usage of the CALayerDelegate
protocol makes all this possible.
More information about the configurability of CALayer
s can be found in the Setting Up Layer Objects section of the Core Animation Programming Guide.
There is a simpler way to achieve it,
HTML
<a href="https://getbootstrap.com/" id="fooLinkID" target="_blank">Bootstrap is life !</a>
JavaScript
// Simulating click after 3 seconds
setTimeout(function(){
document.getElementById('fooLinkID').click();
}, 3 * 1000);
Using plain javascript to simulate a click along with addressing the target property.
You can check working example here on jsFiddle.
You Don't need to close the wrapped reader/writer.
If you've taken a look at the docs (Reader.close()
,Writer.close()
), You'll see that in Reader.close()
it says:
Closes the stream and releases any system resources associated with it.
Which just says that it "releases any system resources associated with it". Even though it doesn't confirm.. it gives you a nudge to start looking deeper. and if you go to Writer.close()
it only states that it closes itself.
In such cases, we refer to OpenJDK to take a look at the source code.
At BufferedWriter Line 265 you'll see out.close()
. So it's not closing itself.. It's something else. If you search the class for occurences of "out
" you'll notice that in the constructor at Line 87 that out
is the writer the class wraps where it calls another constructor and then assigning out
parameter to it's own out
variable..
So.. What about others? You can see similar code at BufferedReader Line 514, BufferedInputStream Line 468 and InputStreamReader Line 199. Others i don't know but this should be enough to assume that they do.
This will work fine with Linq to Objects. However, some LINQ providers have difficulty running CLR methods as part of the query. This is expecially true of some database providers.
The problem is that the DB providers try to move and compile the LINQ query as a database query, to prevent pulling all of the objects across the wire. This is a good thing, but does occasionally restrict the flexibility in your predicates.
Unfortunately, without checking the provider documentation, it's difficult to always know exactly what will or will not be supported directly in the provider. It looks like your provider allows comparisons, but not the string check. I'd guess that, in your case, this is probably about as good of an approach as you can get. (It's really not that different from the IsNullOrEmpty check, other than creating the "string.Empty" instance for comparison, but that's minor.)
For an easy fix, you could
echo 1 > /proc/sys/vm/overcommit_memory
if your're sure that your system has enough memory. See Linux over commit heuristic.
take a global variable for current selection of spinner:
int currentItem = 0;
spinner_counter = (Spinner)findViewById(R.id.spinner_counter);
String[] value={"20","40","60","80","100","All"};
aa=new ArrayAdapter<String>(this,R.layout.spinner_item_profile,value);
aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner_counter.setAdapter(aa);
spinner_counter.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
if(currentItem == position){
return; //do nothing
}
else
{
TextView spinner_item_text = (TextView) view;
//write your code here
}
currentItem = position;
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
//R.layout.spinner_item_profile
<?xml version="1.0" encoding="utf-8"?>
<TextView android:id="@+id/spinner_item_text"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/border_close_profile"
android:gravity="start"
android:textColor="@color/black"
android:paddingLeft="5dip"
android:paddingStart="5dip"
android:paddingTop="12dip"
android:paddingBottom="12dip"
/>
//drawable/border_close_profile
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="rectangle">
<solid android:color="#e2e3d7" />
</shape>
</item>
<item android:left="1dp"
android:right="1dp"
android:top="1dp"
android:bottom="1dp">
<shape android:shape="rectangle">
<solid android:color="@color/white_text" />
</shape>
</item>
</layer-list>
I've tried a few times to get the ajax form submit working nicely, but always met with either complete failure or too many compromises. Here's an example of page that uses the jQuery Form plug-in inside of a MVC page to update a list of projects (using a partially rendered control) as the user types in an input box:
<div class="searchBar">
<form action="<%= Url.Action ("SearchByName") %>" method="get" class="searchSubmitForm">
<label for="projectName">Search:</label>
<%= Html.TextBox ("projectName") %>
<input class="submit" type="submit" value="Search" />
</form>
</div>
<div id="projectList">
<% Html.RenderPartial ("ProjectList", Model); %>
</div>
<script type="text/javascript">
jQuery(document).ready(function() {
jQuery("#projectName").keyup(function() {
jQuery(".searchSubmitForm").submit();
});
jQuery(".searchSubmitForm").submit(function() {
var options = {
target : '#projectList'
}
jQuery(this).ajaxSubmit(options);
return false;
});
// We remove the submit button here - good Javascript depreciation technique
jQuery(".submit").remove();
});
</script>
And on the controller side:
public ActionResult SearchByName (string projectName)
{
var service = Factory.GetService<IProjectService> ();
var result = service.GetProjects (projectName);
if (Request.IsAjaxRequest ())
return PartialView ("ProjectList", result);
else
{
TempData["Result"] = result;
TempData["SearchCriteria"] = projectName;
return RedirectToAction ("Index");
}
}
public ActionResult Index ()
{
IQueryable<Project> projects;
if (TempData["Result"] != null)
projects = (IQueryable<Project>)TempData["Result"];
else
{
var service = Factory.GetService<IProjectService> ();
projects = service.GetProjects ();
}
ViewData["projectName"] = TempData["SearchCriteria"];
return View (projects);
}
To all:
Note that the accepted answer has a bug in it relating to nullable types and the DataTable. The fix is available at the linked site (http://www.chinhdo.com/20090402/convert-list-to-datatable/) or in my modified code below:
///###############################################################
/// <summary>
/// Convert a List to a DataTable.
/// </summary>
/// <remarks>
/// Based on MIT-licensed code presented at http://www.chinhdo.com/20090402/convert-list-to-datatable/ as "ToDataTable"
/// <para/>Code modifications made by Nick Campbell.
/// <para/>Source code provided on this web site (chinhdo.com) is under the MIT license.
/// <para/>Copyright © 2010 Chinh Do
/// <para/>Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
/// <para/>The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
/// <para/>THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
/// <para/>(As per http://www.chinhdo.com/20080825/transactional-file-manager/)
/// </remarks>
/// <typeparam name="T">Type representing the type to convert.</typeparam>
/// <param name="l_oItems">List of requested type representing the values to convert.</param>
/// <returns></returns>
///###############################################################
/// <LastUpdated>February 15, 2010</LastUpdated>
public static DataTable ToDataTable<T>(List<T> l_oItems) {
DataTable oReturn = new DataTable(typeof(T).Name);
object[] a_oValues;
int i;
//#### Collect the a_oProperties for the passed T
PropertyInfo[] a_oProperties = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);
//#### Traverse each oProperty, .Add'ing each .Name/.BaseType into our oReturn value
//#### NOTE: The call to .BaseType is required as DataTables/DataSets do not support nullable types, so it's non-nullable counterpart Type is required in the .Column definition
foreach(PropertyInfo oProperty in a_oProperties) {
oReturn.Columns.Add(oProperty.Name, BaseType(oProperty.PropertyType));
}
//#### Traverse the l_oItems
foreach (T oItem in l_oItems) {
//#### Collect the a_oValues for this loop
a_oValues = new object[a_oProperties.Length];
//#### Traverse the a_oProperties, populating each a_oValues as we go
for (i = 0; i < a_oProperties.Length; i++) {
a_oValues[i] = a_oProperties[i].GetValue(oItem, null);
}
//#### .Add the .Row that represents the current a_oValues into our oReturn value
oReturn.Rows.Add(a_oValues);
}
//#### Return the above determined oReturn value to the caller
return oReturn;
}
///###############################################################
/// <summary>
/// Returns the underlying/base type of nullable types.
/// </summary>
/// <remarks>
/// Based on MIT-licensed code presented at http://www.chinhdo.com/20090402/convert-list-to-datatable/ as "GetCoreType"
/// <para/>Code modifications made by Nick Campbell.
/// <para/>Source code provided on this web site (chinhdo.com) is under the MIT license.
/// <para/>Copyright © 2010 Chinh Do
/// <para/>Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
/// <para/>The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
/// <para/>THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
/// <para/>(As per http://www.chinhdo.com/20080825/transactional-file-manager/)
/// </remarks>
/// <param name="oType">Type representing the type to query.</param>
/// <returns>Type representing the underlying/base type.</returns>
///###############################################################
/// <LastUpdated>February 15, 2010</LastUpdated>
public static Type BaseType(Type oType) {
//#### If the passed oType is valid, .IsValueType and is logicially nullable, .Get(its)UnderlyingType
if (oType != null && oType.IsValueType &&
oType.IsGenericType && oType.GetGenericTypeDefinition() == typeof(Nullable<>)
) {
return Nullable.GetUnderlyingType(oType);
}
//#### Else the passed oType was null or was not logicially nullable, so simply return the passed oType
else {
return oType;
}
}
Note that both of these example are NOT extension methods like the example above.
Lastly... apologies for my extensive/excessive comments (I had a anal/mean prof that beat it into me! ;)
Why not just reload the page when the user rotates the screen with javascript
function doOnOrientationChange()
{
location.reload();
}
window.addEventListener('orientationchange', doOnOrientationChange);
Another limitation to consider is that SQL Server Express editions go into an idle mode after a period of disuse.
Understanding SQL Express behavior: Idle time resource usage, AUTO_CLOSE and User Instances:
When SQL Express is idle it aggressively trims back the working memory set by writing the cached data back to disk and releasing the memory.
But this is easily worked around: Is there a way to stop SQL Express 2008 from Idling?
Here is another appraoch with System.Collections.BitArray
which has such a constructor.
bool[] result = new BitArray(1000000, true).Cast<bool>().ToArray();
or
bool[] result = new bool[1000000];
new BitArray(1000000, true).CopyTo(result, 0);
I had a .live("focus") event set to select() (highlight) the contents of a text input so that the user wouldn't have to select it before typing a new value.
$(formObj).select();
Because of quirks between different browsers, the select would sometimes be superseded by the click that caused it, and it would deselect the contents right after in favor of placing the cursor within the text field (worked mostly ok in FF but failed in IE)
I thought I could solve this by putting a slight delay on the select...
setTimeout(function(){$(formObj).select();},200);
This worked fine and the select would persist, but a funny problem arose.. If you tabbed from one field to the next, the focus would switch to the next field before the select took place. Since select steals focus, the focus would then go back and trigger a new "focus" event. This ended up in a cascade of input selects dancing all over the screen.
A workable solution would be to check that the field still has focus before executing the select(), but as mentioned, there's no simple way to check... I ended up just dispensing with the whole auto highlight, rather than turning what should be a single jQuery select() call into a huge function laden with subroutines...
I translated the Levenshtein distance algorithm into JavaScript:
String.prototype.LevenshteinDistance = function (s2) {
var array = new Array(this.length + 1);
for (var i = 0; i < this.length + 1; i++)
array[i] = new Array(s2.length + 1);
for (var i = 0; i < this.length + 1; i++)
array[i][0] = i;
for (var j = 0; j < s2.length + 1; j++)
array[0][j] = j;
for (var i = 1; i < this.length + 1; i++) {
for (var j = 1; j < s2.length + 1; j++) {
if (this[i - 1] == s2[j - 1]) array[i][j] = array[i - 1][j - 1];
else {
array[i][j] = Math.min(array[i][j - 1] + 1, array[i - 1][j] + 1);
array[i][j] = Math.min(array[i][j], array[i - 1][j - 1] + 1);
}
}
}
return array[this.length][s2.length];
};
You can also do this
<input type="hidden" name="text" value="{% url 'dashboard' %}" />
You have to use MySQLi, below code works well
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "SELECT CURRENT_USER();";
$query .= "SELECT Name FROM City ORDER BY ID LIMIT 20, 5";
/* execute multi query */
if ($mysqli->multi_query($query)) {
do {
/* store first result set */
if ($result = $mysqli->store_result()) {
while ($row = $result->fetch_row()) {
printf("%s\n", $row[0]);
}
$result->free();
}
/* print divider */
if ($mysqli->more_results()) {
printf("-----------------\n");
}
} while ($mysqli->next_result());
}
/* close connection */
$mysqli->close();
?>
If the program you're using to execute your script needs parameters, you can put them at the end of the #! line:
#!/usr/bin/R --random --switches --f
Not knowing R, I can't test properly, but this seems to work:
axa@artemis:~$ cat r.test
#!/usr/bin/R -q -f
error
axa@artemis:~$ ./r.test
> #!/usr/bin/R -q -f
> error
Error: object "error" not found
Execution halted
axa@artemis:~$
You can project 3D point in 2D using: Commons Math: The Apache Commons Mathematics Library with just two classes.
Example for Java Swing.
import org.apache.commons.math3.geometry.euclidean.threed.Plane;
import org.apache.commons.math3.geometry.euclidean.threed.Vector3D;
Plane planeX = new Plane(new Vector3D(1, 0, 0));
Plane planeY = new Plane(new Vector3D(0, 1, 0)); // Must be orthogonal plane of planeX
void drawPoint(Graphics2D g2, Vector3D v) {
g2.drawLine(0, 0,
(int) (world.unit * planeX.getOffset(v)),
(int) (world.unit * planeY.getOffset(v)));
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
drawPoint(g2, new Vector3D(2, 1, 0));
drawPoint(g2, new Vector3D(0, 2, 0));
drawPoint(g2, new Vector3D(0, 0, 2));
drawPoint(g2, new Vector3D(1, 1, 1));
}
Now you only needs update the planeX
and planeY
to change the perspective-projection, to get things like this:
DataGridView.SelectedCells
is a collection of cells, so it's not as simple as calling ToString()
on it. You have to loop through each cell in the collection and get each cell's value instead.
The following will create a comma-delimited list of all selected cells' values.
C#
TextBox1.Text = "";
bool FirstValue = true;
foreach(DataGridViewCell cell in DataGridView1.SelectedCells)
{
if(!FirstValue)
{
TextBox1.Text += ", ";
}
TextBox1.Text += cell.Value.ToString();
FirstValue = false;
}
VB.NET (Translated from the code above)
TextBox1.Text = ""
Dim FirstValue As Boolean = True
Dim cell As DataGridViewCell
For Each cell In DataGridView1.SelectedCells
If Not FirstValue Then
TextBox1.Text += ", "
End If
TextBox1.Text += cell.Value.ToString()
FirstValue = False
Next
Exception
Items collection must be empty before using ItemsSource.
This exception occurs when you add items to the ItemsSource
through different sources. So
Make sure you haven't accidentally missed a tag, misplaced a tag, added extra tags, or miswrote a tag.
<!--Right-->
<ItemsControl ItemsSource="{Binding MyItems}">
<ItemsControl.ItemsPanel.../>
<ItemsControl.MyAttachedProperty.../>
<FrameworkElement.ActualWidth.../>
</ItemsControl>
<!--WRONG-->
<ItemsControl ItemsSource="{Binding MyItems}">
<Grid.../>
<Button.../>
<DataTemplate.../>
<Heigth.../>
</ItemsControl>
While ItemsControl.ItemsSource
is already set through Binding
, other items (Grid, Button, ...) can't be added to the source.
However while ItemsSource
is not in-use the following code is allowed:
<!--Right-->
<ItemsControl>
<Button.../>
<TextBlock.../>
<sys:String.../>
</ItemsControl>
notice the missing ItemsSource="{Binding MyItems}"
part.
Very elegant:
String.prototype.format = function (){
var args = arguments;
return this.replace(/\{\{|\}\}|\{(\d+)\}/g, function (curlyBrack, index) {
return ((curlyBrack == "{{") ? "{" : ((curlyBrack == "}}") ? "}" : args[index]));
});
};
// Usage:
"{0}{1}".format("{1}", "{0}")
Credit goes to (broken link) https://gist.github.com/0i0/1519811
freopen("/my/newstdin", "r", stdin);
freopen("/my/newstdout", "w", stdout);
freopen("/my/newstderr", "w", stderr);
... do your stuff
freopen("/dev/stdin", "r", stdin);
...
...
This peaks the needle on my round-peg-square-hole-o-meter, what are you trying to accomplish?
Edit:
Remember that stdin, stdout and stderr are file descriptors 0, 1 and 2 for every newly created process. freopen() should keep the same fd's, just assign new streams to them.
So, a good way to ensure that this is actually doing what you want it to do would be:
printf("Stdout is descriptor %d\n", fileno(stdout));
freopen("/tmp/newstdout", "w", stdout);
printf("Stdout is now /tmp/newstdout and hopefully still fd %d\n",
fileno(stdout));
freopen("/dev/stdout", "w", stdout);
printf("Now we put it back, hopefully its still fd %d\n",
fileno(stdout));
I believe this is the expected behavior of freopen(), as you can see, you're still only using three file descriptors (and associated streams).
This would override any shell redirection, as there would be nothing for the shell to redirect. However, its probably going to break pipes. You might want to be sure to set up a handler for SIGPIPE, in case your program finds itself on the blocking end of a pipe (not FIFO, pipe).
So, ./your_program --stdout /tmp/stdout.txt --stderr /tmp/stderr.txt should be easily accomplished with freopen() and keeping the same actual file descriptors. What I don't understand is why you'd need to put them back once changing them? Surely, if someone passed either option, they would want it to persist until the program terminated?
You could also write a reusable class for QueryParam-annotated variables
public class DateParam {
private SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
private Calendar date;
public DateParam(String in) throws WebApplicationException {
try {
date = Calendar.getInstance();
date.setTime(format.parse(in));
}
catch (ParseException exception) {
throw new WebApplicationException(400);
}
}
public Calendar getDate() {
return date;
}
public String format() {
return format.format(value.getTime());
}
}
then use it like this:
private @QueryParam("from") DateParam startDateParam;
private @QueryParam("to") DateParam endDateParam;
// ...
startDateParam.getDate();
Although the error handling is trivial in this case (throwing a 400 response), using this class allows you to factor-out parameter handling in general which might include logging etc.
The ContextSwitchDeadlock
doesn't necessarily mean your code has an issue, just that there is a potential. If you go to Debug > Exceptions
in the menu and expand the Managed Debugging Assistants
, you will find ContextSwitchDeadlock
is enabled. If you disable this, VS will no longer warn you when items are taking a long time to process. In some cases you may validly have a long-running operation. It's also helpful if you are debugging and have stopped on a line while this is processing - you don't want it to complain before you've had a chance to dig into an issue.
Try giving the full path to apache2ctl.
Proxy timeouts are well, for proxies, not for FastCGI...
The directives that affect FastCGI timeouts are client_header_timeout
, client_body_timeout
and send_timeout
.
Edit: Considering what's found on nginx wiki, the send_timeout directive is responsible for setting general timeout of response (which was bit misleading). For FastCGI there's fastcgi_read_timeout
which is affecting the fastcgi process response timeout.
HTH.
Scenarios I make use of IDisposable: clean up unmanaged resources, unsubscribe for events, close connections
The idiom I use for implementing IDisposable (not threadsafe):
class MyClass : IDisposable {
// ...
#region IDisposable Members and Helpers
private bool disposed = false;
public void Dispose() {
Dispose(true);
GC.SuppressFinalize(this);
}
private void Dispose(bool disposing) {
if (!this.disposed) {
if (disposing) {
// cleanup code goes here
}
disposed = true;
}
}
~MyClass() {
Dispose(false);
}
#endregion
}
If you want to use a the my_helper_method
inside a model, you can write:
ApplicationController.helpers.my_helper_method
Yet another answer (in January 2018) to the old question (in January 2009).
The specification of Java properties file is described in the JavaDoc of java.util.Properties.load(java.io.Reader)
. One problem is that the specification is a bit complicated than the first impression we may have. Another problem is that some answers here arbitrarily added extra specifications - for example, ;
and '
are regarded as starters of comment lines but they should not be. Double/single quotations around property values are removed but they should not be.
The following are points to be considered.
\n
, \r
, \r\n
or the end of the stream.\
.
, \u0020
), tab (\t
, \u0009
) and form feed (\f
, \u000C
).=
is used as the separator between a key and a value.:
is used as the separator between a key and a value, too.#
or !
as its first non-white space characters, meaning leading white spaces before #
or !
are allowed.\
.=
, :
and white spaces can be embedded in a key if they are escaped by backslashes.\r
and \n
escape sequences.\uxxxx
is used to represent a Unicode character.So, for example, if test.properties
has the following content:
# A comment line that starts with '#'.
# This is a comment line having leading white spaces.
! A comment line that starts with '!'.
key1=value1
key2 : value2
key3 value3
key\
4=value\
4
\u006B\u0065\u00795=\u0076\u0061\u006c\u0075\u00655
\k\e\y\6=\v\a\lu\e\6
\:\ \= = \\colon\\space\\equal
it should be interpreted as the following key-value pairs.
+------+--------------------+
| KEY | VALUE |
+------+--------------------+
| key1 | value1 |
| key2 | value2 |
| key3 | value3 |
| key4 | value4 |
| key5 | value5 |
| key6 | value6 |
| : = | \colon\space\equal |
+------+--------------------+
PropertiesLoader
class in Authlete.Authlete NuGet package can interpret the format of the specification. The example code below:
using System;
using System.IO;
using System.Collections.Generic;
using Authlete.Util;
namespace MyApp
{
class Program
{
public static void Main(string[] args)
{
string file = "test.properties";
IDictionary<string, string> properties;
using (TextReader reader = new StreamReader(file))
{
properties = PropertiesLoader.Load(reader);
}
foreach (var entry in properties)
{
Console.WriteLine($"{entry.Key} = {entry.Value}");
}
}
}
}
will generate this output:
key1 = value1
key2 = value2
key3 = value3
key4 = value4
key5 = value5
key6 = value6
: = = \colon\space\equal
An equivalent example in Java is as follows:
import java.util.*;
import java.io.*;
public class Program
{
public static void main(String[] args) throws IOException
{
String file = "test.properties";
Properties properties = new Properties();
try (Reader reader = new FileReader(file))
{
properties.load(reader);
}
for (Map.Entry<Object, Object> entry : properties.entrySet())
{
System.out.format("%s = %s\n", entry.getKey(), entry.getValue());
}
}
}
The source code, PropertiesLoader.cs
, can be found in authlete-csharp. xUnit tests for PropertiesLoader
are written in PropertiesLoaderTest.cs
.
No, the down arrow is a browser element. It's built in [and different] in every browser. You can, however, replace the select box with a custom drop down box using javascript.
Jan Hancic mentioned a jQuery plugin to do just that.
Except for some internal logging, Close == Dispose.
Dispose calls tcpClient.Client.Shutdown( SocketShutdown.Both ), but its eats any errors. Maybe if you call it directly, you can get some useful exception information.
Try using
unset($v)
It seems the only time a variable is not set is when it is specifically unset($v). It sounds like your meaning of 'existence' is different than PHP's definition. NULL is certainly existing, it is NULL.
You can try this force-download script. Even if you don't use it, it'll probably point you in the right direction:
<?php
$filename = $_GET['file'];
// required for IE, otherwise Content-disposition is ignored
if(ini_get('zlib.output_compression'))
ini_set('zlib.output_compression', 'Off');
// addition by Jorg Weske
$file_extension = strtolower(substr(strrchr($filename,"."),1));
if( $filename == "" )
{
echo "<html><title>eLouai's Download Script</title><body>ERROR: download file NOT SPECIFIED. USE force-download.php?file=filepath</body></html>";
exit;
} elseif ( ! file_exists( $filename ) )
{
echo "<html><title>eLouai's Download Script</title><body>ERROR: File not found. USE force-download.php?file=filepath</body></html>";
exit;
};
switch( $file_extension )
{
case "pdf": $ctype="application/pdf"; break;
case "exe": $ctype="application/octet-stream"; break;
case "zip": $ctype="application/zip"; break;
case "doc": $ctype="application/msword"; break;
case "xls": $ctype="application/vnd.ms-excel"; break;
case "ppt": $ctype="application/vnd.ms-powerpoint"; break;
case "gif": $ctype="image/gif"; break;
case "png": $ctype="image/png"; break;
case "jpeg":
case "jpg": $ctype="image/jpg"; break;
default: $ctype="application/octet-stream";
}
header("Pragma: public"); // required
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: private",false); // required for certain browsers
header("Content-Type: $ctype");
// change, added quotes to allow spaces in filenames, by Rajkumar Singh
header("Content-Disposition: attachment; filename=\"".basename($filename)."\";" );
header("Content-Transfer-Encoding: binary");
header("Content-Length: ".filesize($filename));
readfile("$filename");
exit();
Found myself facing just the same problem today. I wrote a very simple HTML parser to strip incoming content of all markups, returning the remaining text with only a minimum of formatting.
from HTMLParser import HTMLParser
from re import sub
from sys import stderr
from traceback import print_exc
class _DeHTMLParser(HTMLParser):
def __init__(self):
HTMLParser.__init__(self)
self.__text = []
def handle_data(self, data):
text = data.strip()
if len(text) > 0:
text = sub('[ \t\r\n]+', ' ', text)
self.__text.append(text + ' ')
def handle_starttag(self, tag, attrs):
if tag == 'p':
self.__text.append('\n\n')
elif tag == 'br':
self.__text.append('\n')
def handle_startendtag(self, tag, attrs):
if tag == 'br':
self.__text.append('\n\n')
def text(self):
return ''.join(self.__text).strip()
def dehtml(text):
try:
parser = _DeHTMLParser()
parser.feed(text)
parser.close()
return parser.text()
except:
print_exc(file=stderr)
return text
def main():
text = r'''
<html>
<body>
<b>Project:</b> DeHTML<br>
<b>Description</b>:<br>
This small script is intended to allow conversion from HTML markup to
plain text.
</body>
</html>
'''
print(dehtml(text))
if __name__ == '__main__':
main()
Not yet, but the New NIO (JSR 203) will have support for these common operations.
In the meantime, there are a few things to keep in mind.
File.renameTo generally works only on the same file system volume. I think of this as the equivalent to a "mv" command. Use it if you can, but for general copy and move support, you'll need to have a fallback.
When a rename doesn't work you will need to actually copy the file (deleting the original with File.delete if it's a "move" operation). To do this with the greatest efficiency, use the FileChannel.transferTo or FileChannel.transferFrom methods. The implementation is platform specific, but in general, when copying from one file to another, implementations avoid transporting data back and forth between kernel and user space, yielding a big boost in efficiency.
Merging using an EqualityComparer
that maps items for comparison to a different value/type. Here we will map from KeyValuePair
(item type when enumerating a dictionary) to Key
.
public class MappedEqualityComparer<T,U> : EqualityComparer<T>
{
Func<T,U> _map;
public MappedEqualityComparer(Func<T,U> map)
{
_map = map;
}
public override bool Equals(T x, T y)
{
return EqualityComparer<U>.Default.Equals(_map(x), _map(y));
}
public override int GetHashCode(T obj)
{
return _map(obj).GetHashCode();
}
}
Usage:
// if dictA and dictB are of type Dictionary<int,string>
var dict = dictA.Concat(dictB)
.Distinct(new MappedEqualityComparer<KeyValuePair<int,string>,int>(item => item.Key))
.ToDictionary(item => item.Key, item=> item.Value);
There are pre-release (beta) versions of NCover available for free. They work fine for most cases, especially when combined with NCoverExplorer.
These have the same end result, but I would simply add that using the literal syntax can help one become accustomed to the syntax of JSON (a string-ified subset of JavaScript literal object syntax), so it might be a good practice to get into.
One other thing: you might have subtle errors if you forget to use the new
operator. So, using literals will help you avoid that problem.
Ultimately, it will depend on the situation as well as preference.
There's a beautiful solution if you're using Python 3.4 or better. Use the input
argument instead of the stdin
argument, which accepts a bytes argument:
output = subprocess.check_output(
["sed", "s/foo/bar/"],
input=b"foo",
)
This works for check_output
and run
, but not call
or check_call
for some reason.
Personally I would always run some form of sanitation on the data first as you can never trust user input, however when using placeholders / parameter binding the inputted data is sent to the server separately to the sql statement and then binded together. The key here is that this binds the provided data to a specific type and a specific use and eliminates any opportunity to change the logic of the SQL statement.
Simple fix: Attach a random query string to the image:
<img src="foo.cgi?random=323527528432525.24234" alt="">
What the HTTP RFC says:
Cache-Control: no-cache
But that doesn't work that well :)
DDD is the GNU frontend for gdb: http://www.gnu.org/software/ddd/
Something like this:
STARTUPINFO info={sizeof(info)};
PROCESS_INFORMATION processInfo;
if (CreateProcess(path, cmd, NULL, NULL, TRUE, 0, NULL, NULL, &info, &processInfo))
{
WaitForSingleObject(processInfo.hProcess, INFINITE);
CloseHandle(processInfo.hProcess);
CloseHandle(processInfo.hThread);
}
import unittest
def generator(test_class, a, b):
def test(self):
self.assertEqual(a, b)
return test
def add_test_methods(test_class):
# The first element of list is variable "a", then variable "b", then name of test case that will be used as suffix.
test_list = [[2,3, 'one'], [5,5, 'two'], [0,0, 'three']]
for case in test_list:
test = generator(test_class, case[0], case[1])
setattr(test_class, "test_%s" % case[2], test)
class TestAuto(unittest.TestCase):
def setUp(self):
print 'Setup'
pass
def tearDown(self):
print 'TearDown'
pass
_add_test_methods(TestAuto) # It's better to start with underscore so it is not detected as a test itself
if __name__ == '__main__':
unittest.main(verbosity=1)
RESULT:
>>>
Setup
FTearDown
Setup
TearDown
.Setup
TearDown
.
======================================================================
FAIL: test_one (__main__.TestAuto)
----------------------------------------------------------------------
Traceback (most recent call last):
File "D:/inchowar/Desktop/PyTrash/test_auto_3.py", line 5, in test
self.assertEqual(a, b)
AssertionError: 2 != 3
----------------------------------------------------------------------
Ran 3 tests in 0.019s
FAILED (failures=1)
Here's a little Tcl script that will do what you want. The Wish interpreter should be installed by default on Ubuntu.
#!/usr/bin/wish
pack [label .msg -text [lindex $argv 0]]
pack [entry .ent]
bind .ent <KeyPress-Return> { puts [.ent get]; destroy . }
focus .ent
Call it like this:
myanswer=`gui-prompt "type your answer and press enter"`
You can call dispose()
on the current window and setVisible(true)
on the one you want to display.
I think of return
as a trick. As a general rule, the value of the last expression evaluated in a function becomes the function's value -- and this general pattern is found in many places. All of the following evaluate to 3:
local({
1
2
3
})
eval(expression({
1
2
3
}))
(function() {
1
2
3
})()
What return
does is not really returning a value (this is done with or without it) but "breaking out" of the function in an irregular way. In that sense, it is the closest equivalent of GOTO statement in R (there are also break and next). I use return
very rarely and never at the end of a function.
if(a) {
return(a)
} else {
return(b)
}
... this can be rewritten as if(a) a else b
which is much better readable and less curly-bracketish. No need for return
at all here. My prototypical case of use of "return" would be something like ...
ugly <- function(species, x, y){
if(length(species)>1) stop("First argument is too long.")
if(species=="Mickey Mouse") return("You're kidding!")
### do some calculations
if(grepl("mouse", species)) {
## do some more calculations
if(species=="Dormouse") return(paste0("You're sleeping until", x+y))
## do some more calculations
return(paste0("You're a mouse and will be eating for ", x^y, " more minutes."))
}
## some more ugly conditions
# ...
### finally
return("The end")
}
Generally, the need for many return's suggests that the problem is either ugly or badly structured.
[EDIT]
return
doesn't really need a function to work: you can use it to break out of a set of expressions to be evaluated.
getout <- TRUE
# if getout==TRUE then the value of EXP, LOC, and FUN will be "OUTTA HERE"
# .... if getout==FALSE then it will be `3` for all these variables
EXP <- eval(expression({
1
2
if(getout) return("OUTTA HERE")
3
}))
LOC <- local({
1
2
if(getout) return("OUTTA HERE")
3
})
FUN <- (function(){
1
2
if(getout) return("OUTTA HERE")
3
})()
identical(EXP,LOC)
identical(EXP,FUN)
You need to use a global regular expression for this. Try it this way:
str.replace(/"/g, '\\"');
Check out regex syntax and options for the replace function in Using Regular Expressions with JavaScript.
echo do_shortcode('[CONTACT-US-FORM]');
Use this in your template.
Look here for more: Do Shortcode
I had to specify different generateDirectory
(without this, the plugin was considering that files were up to date and wasn't generating anything during the second execution). And I recommend to follow the target/generated-sources/<tool>
convention for generated sources so that they will be imported in your favorite IDE automatically. I also recommend to declare several execution
instead of declaring the plugin twice (and to move the configuration
inside each execution
element):
<plugin>
<groupId>org.jvnet.jaxb2.maven2</groupId>
<artifactId>maven-jaxb2-plugin</artifactId>
<version>0.7.1</version>
<executions>
<execution>
<id>schema1-generate</id>
<goals>
<goal>generate</goal>
</goals>
<configuration>
<schemaDirectory>src/main/resources/dir1</schemaDirectory>
<schemaIncludes>
<include>shiporder.xsd</include>
</schemaIncludes>
<generatePackage>com.stackoverflow.package1</generatePackage>
<generateDirectory>${project.build.directory}/generated-sources/xjc1</generateDirectory>
</configuration>
</execution>
<execution>
<id>schema2-generate</id>
<goals>
<goal>generate</goal>
</goals>
<configuration>
<schemaDirectory>src/main/resources/dir2</schemaDirectory>
<schemaIncludes>
<include>books.xsd</include>
</schemaIncludes>
<generatePackage>com.stackoverflow.package2</generatePackage>
<generateDirectory>${project.build.directory}/generated-sources/xjc2</generateDirectory>
</configuration>
</execution>
</executions>
</plugin>
With this setup, I get the following result after a mvn clean compile
$ tree target/ target/ +-- classes ¦ +-- com ¦ ¦ +-- stackoverflow ¦ ¦ +-- App.class ¦ ¦ +-- package1 ¦ ¦ ¦ +-- ObjectFactory.class ¦ ¦ ¦ +-- Shiporder.class ¦ ¦ ¦ +-- Shiporder$Item.class ¦ ¦ ¦ +-- Shiporder$Shipto.class ¦ ¦ +-- package2 ¦ ¦ +-- BookForm.class ¦ ¦ +-- BooksForm.class ¦ ¦ +-- ObjectFactory.class ¦ ¦ +-- package-info.class ¦ +-- dir1 ¦ ¦ +-- shiporder.xsd ¦ +-- dir2 ¦ +-- books.xsd +-- generated-sources +-- xjc ¦ +-- META-INF ¦ +-- sun-jaxb.episode +-- xjc1 ¦ +-- com ¦ +-- stackoverflow ¦ +-- package1 ¦ +-- ObjectFactory.java ¦ +-- Shiporder.java +-- xjc2 +-- com +-- stackoverflow +-- package2 +-- BookForm.java +-- BooksForm.java +-- ObjectFactory.java +-- package-info.java
Which seems to be the expected result.
NSString *message = @"Some message...";
UIAlertView *toast = [[UIAlertView alloc] initWithTitle:nil
message:message
delegate:nil
cancelButtonTitle:nil
otherButtonTitles:nil, nil];
[toast show];
int duration = 1; // duration in seconds
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, duration * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
[toast dismissWithClickedButtonIndex:0 animated:YES];
});
Using UIAlertViewController for iOS 9 or later
NSString *message = @"Some message...";
UIAlertController *alert = [UIAlertController alertControllerWithTitle:nil
message:message
preferredStyle:UIAlertControllerStyleAlert];
[self presentViewController:alert animated:YES completion:nil];
int duration = 1; // duration in seconds
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, duration * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
[alert dismissViewControllerAnimated:YES completion:nil];
});
Swift 3.2
let message = "Some message..."
let alert = UIAlertController(title: nil, message: message, preferredStyle: .alert)
self.present(alert, animated: true)
// duration in seconds
let duration: Double = 5
DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + duration) {
alert.dismiss(animated: true)
}
If you're going to opt for
if(foo == true)
why not go all the way and do
if(foo == true == true == true == true == true == true == true == true == true)
Which is the same thing.
I disagree that if its clearly named (ie: IsSomething
) then its ok to not compare to true, but otherwise you should. If its in an if statement obviously it can be compared to true.
if(monday)
Is just as descriptive as
if(monday == true)
I also prefer the same standard for not:
if(!monday)
as opposed to
if(monday == false)
None of the answers are working for me on Windows 10, so here's what I use:
@echo off
set DNS1=8.8.8.8
set DNS2=8.8.4.4
set INTERFACE=Ethernet
netsh int ipv4 set dns name="%INTERFACE%" static %DNS1% primary validate=no
netsh int ipv4 add dns name="%INTERFACE%" %DNS2% index=2
ipconfig /flushdns
pause
This uses Google DNS. You can get interface name with the command netsh int show interface
May I present my guess, since this is not a open technology.
Google says it's about combing information from before, during, after to distinguish human from robot. But I am more interested about that final click on the check box.
Say, the POST data (solved CAPTCHA) has a field called fingerprint, a string calculated from user behavior. I think there may be a field about that check box location. I guess this check box is in a coordinate system randomly generated by Google back-end and encrypted by the public key of my site. So, a robot may "guess/calculate" a location about this box, but when site owner makes the GET query with private key to verify user identity, Google will decrypt the coordinate system and say if the user click on the right place. So, only one possible right click(with some offsets, it's a square box) location in this random coordinate system owned by only Google and site owners.
I don't know if this was "the" official use case, but the following produces a warning in Java (that can further produce compile errors if mixed with return
statements, leading to unreachable code):
while (1 == 2) { // Note that "if" is treated differently
System.out.println("Unreachable code");
}
However this is legal:
while (isUserAGoat()) {
System.out.println("Unreachable but determined at runtime, not at compile time");
}
So I often find myself writing a silly utility method for the quickest way to dummy out a code block, then in completing debugging find all calls to it, so provided the implementation doesn't change this can be used for that.
JLS points out if (false)
does not trigger "unreachable code" for the specific reason that this would break support for debug flags, i.e., basically this use case (h/t @auselen). (static final boolean DEBUG = false;
for instance).
I replaced while
for if
, producing a more obscure use case. I believe you can trip up your IDE, like Eclipse, with this behavior, but this edit is 4 years into the future, and I don't have an Eclipse environment to play with.
You could try to force the browser to open a "Save As..." dialog by doing something like:
header('Content-type: text/csv');
header('Content-disposition: attachment;filename=MyVerySpecial.csv');
echo "cell 1, cell 2";
Which should work across most major browsers.
Here's how to force the target inside a click handler:
$('a#link_id').click(function() {
$(this).attr('target', '_blank');
});
header('Location: http://linkhere.com/' . $your_variable);
Epsilon is your "fuzz factor," since doubles may not be exactly equal. Epsilon lets you describe how close they have to be.
If you were expecting 3.14159 but would take anywhere from 3.14059 to 3.14259 (that is, within 0.001), then you should write something like
double myPi = 22.0d / 7.0d; //Don't use this in real life!
assertEquals(3.14159, myPi, 0.001);
(By the way, 22/7 comes out to 3.1428+, and would fail the assertion. This is a good thing.)
There are two flavors of table valued functions. One that is just a select statement and one that can have more rows than just a select statement.
This can not have a variable:
create function Func() returns table
as
return
select 10 as ColName
You have to do like this instead:
create function Func()
returns @T table(ColName int)
as
begin
declare @Var int
set @Var = 10
insert into @T(ColName) values (@Var)
return
end
No, there's no Python-specific limit on the memory usage of a Python application. I regularly work with Python applications that may use several gigabytes of memory. Most likely, your script actually uses more memory than available on the machine you're running on.
In that case, the solution is to rewrite the script to be more memory efficient, or to add more physical memory if the script is already optimized to minimize memory usage.
Edit:
Your script reads the entire contents of your files into memory at once (line = u.readlines()
). Since you're processing files up to 20 GB in size, you're going to get memory errors with that approach unless you have huge amounts of memory in your machine.
A better approach would be to read the files one line at a time:
for u in files:
for line in u: # This will iterate over each line in the file
# Read values from the line, do necessary calculations
This is a very old threat but, for me just worked to move the html code of the modal I want in the front at first place in file.
For an iBeacon with ProximityUUID E2C56DB5-DFFB-48D2-B060-D0F5A71096E0
, major 0
, minor 0
, and calibrated Tx Power of -59
RSSI, the transmitted BLE advertisement packet looks like this:
d6 be 89 8e 40 24 05 a2 17 6e 3d 71 02 01 1a 1a ff 4c 00 02 15 e2 c5 6d b5 df fb 48 d2 b0 60 d0 f5 a7 10 96 e0 00 00 00 00 c5 52 ab 8d 38 a5
This packet can be broken down as follows:
d6 be 89 8e # Access address for advertising data (this is always the same fixed value)
40 # Advertising Channel PDU Header byte 0. Contains: (type = 0), (tx add = 1), (rx add = 0)
24 # Advertising Channel PDU Header byte 1. Contains: (length = total bytes of the advertising payload + 6 bytes for the BLE mac address.)
05 a2 17 6e 3d 71 # Bluetooth Mac address (note this is a spoofed address)
02 01 1a 1a ff 4c 00 02 15 e2 c5 6d b5 df fb 48 d2 b0 60 d0 f5 a7 10 96 e0 00 00 00 00 c5 # Bluetooth advertisement
52 ab 8d 38 a5 # checksum
The key part of that packet is the Bluetooth Advertisement, which can be broken down like this:
02 # Number of bytes that follow in first AD structure
01 # Flags AD type
1A # Flags value 0x1A = 000011010
bit 0 (OFF) LE Limited Discoverable Mode
bit 1 (ON) LE General Discoverable Mode
bit 2 (OFF) BR/EDR Not Supported
bit 3 (ON) Simultaneous LE and BR/EDR to Same Device Capable (controller)
bit 4 (ON) Simultaneous LE and BR/EDR to Same Device Capable (Host)
1A # Number of bytes that follow in second (and last) AD structure
FF # Manufacturer specific data AD type
4C 00 # Company identifier code (0x004C == Apple)
02 # Byte 0 of iBeacon advertisement indicator
15 # Byte 1 of iBeacon advertisement indicator
e2 c5 6d b5 df fb 48 d2 b0 60 d0 f5 a7 10 96 e0 # iBeacon proximity uuid
00 00 # major
00 00 # minor
c5 # The 2's complement of the calibrated Tx Power
Any Bluetooth LE device that can be configured to send a specific advertisement can generate the above packet. I have configured a Linux computer using Bluez to send this advertisement, and iOS7 devices running Apple's AirLocate test code pick it up as an iBeacon with the fields specified above. See: Use BlueZ Stack As A Peripheral (Advertiser)
This blog has full details about the reverse engineering process.
You could also use plac (a wrapper around argparse
).
As a bonus it generates neat help instructions - see below.
#!/usr/bin/env python3
def main(
arg: ('Argument with two possible values', 'positional', None, None, ['A', 'B'])
):
"""General help for application"""
if arg == 'A':
print("Argument has value A")
elif arg == 'B':
print("Argument has value B")
if __name__ == '__main__':
import plac
plac.call(main)
No arguments supplied - example.py
:
usage: example.py [-h] {A,B}
example.py: error: the following arguments are required: arg
Unexpected argument supplied - example.py C
:
usage: example.py [-h] {A,B}
example.py: error: argument arg: invalid choice: 'C' (choose from 'A', 'B')
Correct argument supplied - example.py A
:
Argument has value A
Full help menu (generated automatically) - example.py -h
:
usage: example.py [-h] {A,B}
General help for application
positional arguments:
{A,B} Argument with two possible values
optional arguments:
-h, --help show this help message and exit
The name of the argument usually equals the parameter name (arg
).
The tuple annotation after arg
parameter has the following meaning:
Argument with two possible values
)positional
)None
)None
)['A', 'B']
)To learn more about using plac check out its great documentation:
C language leaves compiler some freedom about the location of the structural elements in the memory:
The C language provides some assurance to the programmer of the elements layout in the structure:
Problems related to the elements alignment:
How alignment works:
p.s More detailed info are available here: "Samuel P.Harbison, Guy L.Steele C A Reference, (5.6.2 - 5.6.7)"
def start():
Offset = 5
def getMode():
while True:
print('Do you wish to encrypt or decrypt a message?')
mode = input().lower()
if mode in 'encrypt e decrypt d'.split():
return mode
else:
print('Please be sensible try just the lower case')
def getMessage():
print('Enter your message wanted to :')
return input()
def getKey():
key = 0
while True:
print('Enter the key number (1-%s)' % (Offset))
key = int(input())
if (key >= 1 and key <= Offset):
return key
def getTranslatedMessage(mode, message, key):
if mode[0] == 'd':
key = -key
translated = ''
for symbol in message:
if symbol.isalpha():
num = ord(symbol)
num += key
if symbol.isupper():
if num > ord('Z'):
num -= 26
elif num < ord('A'):
num += 26
elif symbol.islower():
if num > ord('z'):
num -= 26
elif num < ord('a'):
num += 26
translated += chr(num)
else:
translated += symbol
return translated
mode = getMode()
message = getMessage()
key = getKey()
print('Your translated text is:')
print(getTranslatedMessage(mode, message, key))
if op.lower() in {'q', 'quit', 'e', 'exit'}:
print("Goodbye!")
return
If it cannot be avoided the suggested pattern extracted from the React docs would be:
import React, { Component } from 'react';
const Child = ({ setRef }) => <input type="text" ref={setRef} />;
class Parent extends Component {
constructor(props) {
super(props);
this.setRef = this.setRef.bind(this);
}
componentDidMount() {
// Calling a function on the Child DOM element
this.childRef.focus();
}
setRef(input) {
this.childRef = input;
}
render() {
return <Child setRef={this.setRef} />
}
}
The Parent forwards a function as prop bound to Parent's this
. When React calls the Child's ref
prop setRef
it will assign the Child's ref
to the Parent's childRef
property.
Ref forwarding is an opt-in feature that lets some components take a ref they receive, and pass it further down (in other words, “forward” it) to a child.
We create Components that forward their ref
with React.forwardRef
.
The returned Component ref prop must be of the same type as the return type of React.createRef
. Whenever React mounts the DOM node then property current
of the ref
created with React.createRef
will point to the underlying DOM node.
import React from "react";
const LibraryButton = React.forwardRef((props, ref) => (
<button ref={ref} {...props}>
FancyButton
</button>
));
class AutoFocus extends React.Component {
constructor(props) {
super(props);
this.childRef = React.createRef();
this.onClick = this.onClick.bind(this);
}
componentDidMount() {
this.childRef.current.focus();
}
onClick() {
console.log("fancy!");
}
render() {
return <LibraryButton onClick={this.onClick} ref={this.childRef} />;
}
}
Created Components are forwarding their ref
to a child node.
function logProps(Component) {
class LogProps extends React.Component {
componentDidUpdate(prevProps) {
console.log('old props:', prevProps);
console.log('new props:', this.props);
}
render() {
const {forwardedRef, ...rest} = this.props;
// Assign the custom prop "forwardedRef" as a ref
return <Component ref={forwardedRef} {...rest} />;
}
}
// Note the second param "ref" provided by React.forwardRef.
// We can pass it along to LogProps as a regular prop, e.g. "forwardedRef"
// And it can then be attached to the Component.
return React.forwardRef((props, ref) => {
return <LogProps {...props} forwardedRef={ref} />;
});
}
See Forwarding Refs in React docs.
Either char(13)
or char(10)
would work. But it is recommended to use char(13) + char(10)
char(10)
= \n
- new linechar(13)
= \r
- go to the beginning of the lineThere are many options to change the font size in the Visual studio code(version:1.36.1), Editor
Go To: File > Preferences > Settings > select User tab > Text Editor > Font > Font Size
Font Size: Change font size in pixels as per your requirement
Press Ctrl + P
Search: settings.json, Open file and add this line in settings.json file:
{
"editor.fontSize": 20
}
Note: Save file after changes
Press Ctrl + Shift + P
Search: Editor Font Zoom In
Search: Editor Font Zoom Out
And here's my final version.
public static class MyWpfExtensions
{
public static System.Windows.Forms.IWin32Window GetIWin32Window(this System.Windows.Media.Visual visual)
{
var source = System.Windows.PresentationSource.FromVisual(visual) as System.Windows.Interop.HwndSource;
System.Windows.Forms.IWin32Window win = new OldWindow(source.Handle);
return win;
}
private class OldWindow : System.Windows.Forms.IWin32Window
{
private readonly System.IntPtr _handle;
public OldWindow(System.IntPtr handle)
{
_handle = handle;
}
#region IWin32Window Members
System.IntPtr System.Windows.Forms.IWin32Window.Handle
{
get { return _handle; }
}
#endregion
}
}
And to actually use it:
var dlg = new FolderBrowserDialog();
System.Windows.Forms.DialogResult result = dlg.ShowDialog(this.GetIWin32Window());
Select element (or group of elements) having class "abc", not having class "xyz":
$('.abc:not(".xyz")')
When selecting regular CSS you can use .abc:not(.xyz)
.
From docs
import operator
list(map(operator.add, first,second))
Use the LIMIT clause:
/* rows x- y numbers */
SELECT * FROM tbl LIMIT x,y;
try the following snippet
const renObjData = this.props.data.map(function(data, idx) {
return <ul key={idx}>{$.map(data,(val,ind) => {
return (<li>{val}</li>);
}
}</ul>;
});
You basically put the files you want to commit on the command line
svn ci file1 file2 dir1/file3
Also be aware that when converting from numeric string ie '56.72'
to INT you may come up against a SQL error.
Conversion failed when converting the varchar value '56.72' to data type int.
To get around this just do two converts as follows:
STRING -> NUMERIC -> INT
or
SELECT CAST(CAST (MyVarcharCol AS NUMERIC(19,4)) AS INT)
When copying data from TableA to TableB, the conversion is implicit, so you dont need the second convert (if you are happy rounding down to nearest INT):
INSERT INTO TableB (MyIntCol)
SELECT CAST(MyVarcharCol AS NUMERIC(19,4)) as [MyIntCol]
FROM TableA
Key input is a predefined event. You can catch events by attaching event_sequence
(s) to event_handle
(s) by using one or multiple of the existing binding methods(bind
, bind_class
, tag_bind
, bind_all
). In order to do that:
event_handle
methodevent_sequence
) that fits your case from an events listWhen an event happens, all of those binding methods implicitly calls the event_handle
method while passing an Event
object, which includes information about specifics of the event that happened, as the argument.
In order to detect the key input, one could first catch all the '<KeyPress>'
or '<KeyRelease>'
events and then find out the particular key used by making use of event.keysym
attribute.
Below is an example using bind
to catch both '<KeyPress>'
and '<KeyRelease>'
events on a particular widget(root
):
try: # In order to be able to import tkinter for
import tkinter as tk # either in python 2 or in python 3
except ImportError:
import Tkinter as tk
def event_handle(event):
# Replace the window's title with event.type: input key
root.title("{}: {}".format(str(event.type), event.keysym))
if __name__ == '__main__':
root = tk.Tk()
event_sequence = '<KeyPress>'
root.bind(event_sequence, event_handle)
root.bind('<KeyRelease>', event_handle)
root.mainloop()
It requires a bit of rearranging, but when
does a good job to replace conditionals above. Here's the example from above written using the declarative syntax. Note that test3
stage is now two different stages. One that runs on the master branch and one that runs on anything else.
stage ('Test 3: Master') {
when { branch 'master' }
steps {
echo 'I only execute on the master branch.'
}
}
stage ('Test 3: Dev') {
when { not { branch 'master' } }
steps {
echo 'I execute on non-master branches.'
}
}
To get the last modification date/time of a file in a locale-independent manner you could use the wmic
command with the DataFile
alias:
wmic DataFile where "Name='D:\\Path\\To\\myfile.txt'" get LastModified /VALUE
Regard that the full path to the file must be provided and that all path separators (backslashes \
) must be doubled herein.
This returns a standardised date/time value like this (meaning 12th of August 2019, 13:00:00, UTC + 120'):
LastModified=20190812130000.000000+120
To capture the date/time value use for /F
, then you can assign it to a variable using set
:
for /F "delims=" %%I in ('
wmic DataFile where "Name='D:\\Path\\To\\myfile.txt'" get LastModified /VALUE
') do for /F "tokens=1* delims==" %%J in ("%%I") do set "DateTime=%%K"
The second for /F
loop avoids artefacts (like orphaned carriage-return characters) from conversion of the Unicode output of wmic
to ASCII/ANSI text by the first for /F
loop (see also this answer).
You can then use sub-string expansion to extract the pure date or the time from this:
set "DateOnly=%DateTime:~0,8%"
set "TimeOnly=%DateTime:~8,6%"
To get the creation date/time or the last access date/time, just replace the property LastModified
by CreationDate
or LastAccessed
, respectively. To get information about a directory rather than a file, use the alias FSDir
instead of DataFile
.
For specifying file (or directory) paths/names containing both ,
and )
, which are usually not accepted by wmic
, take a look at this question.
Check out also this post as well as this one about how to get file and directory date/time stamps.
(Sorry I can't comment just yet, otherwise I would)
To add to Christian's answer you might consider using json_encode
and json_decode
instead of serialize
and unserialize
to keep you safe. See a warning from the PHP man page:
Warning
Do not pass untrusted user input to unserialize(). Unserialization can result in code being loaded and executed due to object instantiation and autoloading, and a malicious user may be able to exploit this. Use a safe, standard data interchange format such as JSON (via json_decode() and json_encode()) if you need to pass serialized data to the user.
So your final solution might have the following:
$file = '/tmp/file';
$content = json_encode($my_variable);
file_put_contents($file, $content);
$content = json_decode(file_get_contents($file), TRUE);
Use this :
public View getViewByPosition(int pos, ListView listView) {
final int firstListItemPosition = listView.getFirstVisiblePosition();
final int lastListItemPosition = firstListItemPosition + listView.getChildCount() - 1;
if (pos < firstListItemPosition || pos > lastListItemPosition ) {
return listView.getAdapter().getView(pos, null, listView);
} else {
final int childIndex = pos - firstListItemPosition;
return listView.getChildAt(childIndex);
}
}
If you want to grant to both tables and views try:
SELECT DISTINCT
|| OWNER
|| '.'
|| TABLE_NAME
|| ' to db_user;'
FROM
ALL_TAB_COLS
WHERE
TABLE_NAME LIKE 'TABLE_NAME_%';
For just views try:
SELECT
'grant select on '
|| OWNER
|| '.'
|| VIEW_NAME
|| ' to REPORT_DW;'
FROM
ALL_VIEWS
WHERE
VIEW_NAME LIKE 'VIEW_NAME_%';
Copy results and execute.
One of the way to browse your database is to use questoid sqlite manager.
# 1. Download questoid manager from this link .
# 2. Drop this file into your eclipse --> dropins.
# 3. Restart your eclipse.
# 4. Now go to your file explorer and click your database. you can find a blue database icon enabled in the top right corner.
# 5. Double click the icon and you can see ur inserted fields/tables/ in the database
These do the same thing:
window.location.assign(url);
window.location = url;
window.location.href = url;
They simply navigate to the new URL. The replace
method on the other hand navigates to the URL without adding a new record to the history.
So, what you have read in those many forums is not correct. The assign
method does add a new record to the history.
Reference: https://developer.mozilla.org/en-US/docs/Web/API/Window/location
You have not provided enough code to help You likely submit the form and reload the page OR you have an object on the page like an embedded PDF that steals the focus.
Here is the canonical plain javascript method of validating a form It can be improved with onubtrusive JS which will remove the inline script, but this is the starting point DEMO
function validate(formObj) {
document.getElementById("errorMsg").innerHTML = "";
var quantity = formObj.quantity;
if (isNaN(quantity)) {
quantity.value="";
quantity.focus();
document.getElementById("errorMsg").innerHTML = "Only numeric value is allowed";
return false;
}
return true; // allow submit
}
Here is the HTML
<form onsubmit="return validate(this)">
<input type="text" name="quantity" value="" />
<input type="submit" />
</form>
<span id="errorMsg"></span>
You want the NPGSQL library. Your only other alternative is ODBC.
Or, alternatively, you can take a list comprehension
approach:
>>> mylis = ['this is test', 'another test']
>>> [item.upper() for item in mylis]
['THIS IS TEST', 'ANOTHER TEST']
Be careful with the 'while(!feof ... fgets()' stuff, fgets can get an error (returnfing false) and loop forever without reaching the end of file. codaddict was closest to being correct but when your 'while fgets' loop ends, check feof; if not true, then you had an error.
Private Sub CommandButton1_Click()
Dim Data As Object, Employee As Object
Application.ScreenUpdating = False
Set Data = ThisWorkbook.Sheets("Data")
Set Employee = ThisWorkbook.Sheets("Employee Names")
Data.Range("AK1").Value = "Lookup"
Data.Range("AK2:AK" & Data.Range("A1").End(xlDown).Row).Formula = "=VLOOKUP(E2,'Employee Names'!$A:$A,1,0)"
Data.Range("AK2:AK" & Data.Range("A1").End(xlDown).Row).Value = Data.Range("AK2:AK" & Data.Range("A1").End(xlDown).Row).Value
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).AutoFilter Field:=5, Criteria1:="<>"
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).AutoFilter Field:=37, Criteria1:="#N/A"
Application.DisplayAlerts = False
Data.AutoFilter.Range.Offset(1, 0).Rows.SpecialCells(xlCellTypeVisible).Delete (xlShiftUp)
Data.Range("AK:AK").Delete
Data.AutoFilterMode = False
'Selection.AutoFilter
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).AutoFilter Field:=7, Criteria1:="="
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).AutoFilter Field:=12, Criteria1:="<>"
Worksheets("Data").Range("A1:AK" & Data.Range("A1").End(xlDown).Row).Copy
Sheets.Add(After:=Sheets(Sheets.Count)).Name = "DrfeeRequested"
Set Dr = ThisWorkbook.Worksheets("DrfeeRequested")
Dr.Range("A1").PasteSpecial Paste:=xlPasteValues
Application.CutCopyMode = False
Data.AutoFilterMode = False
'DrfeeRequested.AutoFilterMode = False
Selection.AutoFilter
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).AutoFilter Field:=13, Criteria1:="<>"
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).Copy
Sheets.Add(After:=Sheets(Sheets.Count)).Name = "RateLockfollowup"
Set Ratefolup = ThisWorkbook.Worksheets("RateLockfollowup")
Ratefolup.Range("A1").PasteSpecial Paste:=xlPasteValues
Application.CutCopyMode = False
Data.AutoFilterMode = False
Selection.AutoFilter
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).AutoFilter Field:=19, Criteria1:="="
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).AutoFilter Field:=13, Criteria1:="<>"
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).Copy
Sheets.Add(After:=Sheets(Sheets.Count)).Name = "Lockedlefollowup"
Set Lockfolup = ThisWorkbook.Worksheets("Lockedlefollowup")
Lockfolup.Range("A1").PasteSpecial Paste:=xlPasteValues
Application.CutCopyMode = False
Data.AutoFilterMode = False
Selection.AutoFilter
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).AutoFilter Field:=19, Criteria1:="="
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).Copy
Sheets.Add(After:=Sheets(Sheets.Count)).Name = "Hoifollowup"
Set Hoifolup = ThisWorkbook.Worksheets("Hoifollowup")
Hoifolup.Range("A1").PasteSpecial Paste:=xlPasteValues
Application.CutCopyMode = False
Data.AutoFilterMode = False
Selection.AutoFilter
TodayDT = Format(Now())
Weekdy = Weekday(Now())
If Weekdy = 2 Then
LastTwoDays = Now() - Weekday(Now(), 3)
ElseIf Weekdy = 3 Then
LastTwoDays = Now() - Weekday(Now(), 3)
ElseIf Weekdy = 4 Then
LastTwoDays = Now() - Weekday(Now(), 3)
ElseIf Weekdy = 5 Then
LastTwoDays = Now() - Weekday(Now(), 3)
ElseIf Weekdy = 6 Then
LastTwoDays = Now() - Weekday(Now(), 3)
Else
MsgBox "Today Satuarday OR Sunday Data is not Available"
End If
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).AutoFilter Field:=12, Criteria1:="="
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).AutoFilter Field:=11, Criteria1:="<>"
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).AutoFilter Field:=11, Criteria1:=" TodayDT", Operator:=xlAnd, Criteria2:="LastTwoDays"
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).Copy
Sheets.Add(After:=Sheets(Sheets.Count)).Name = "DRfeefollowup"
Set Drfreefolup = ThisWorkbook.Worksheets("DRfeefollowup")
Drfreefolup.Range("A1").PasteSpecial Paste:=xlPasteValues
Application.CutCopyMode = False
Data.AutoFilterMode = False
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).AutoFilter Field:=15, Criteria1:="yes"
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).AutoFilter Field:=19, Criteria1:="x"
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).AutoFilter Field:=12, Criteria1:="<>"
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).AutoFilter Field:=13, Criteria1:="<>"
'Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).AutoFilter Field:=14, criterial:="<>"
Data.Range("A1:AK" & Data.Range("A1").End(xlDown).Row).Copy
Sheets.Add(After:=Sheets(Sheets.Count)).Name = "Drworkblefiles"
Set Drworkblefiles = ThisWorkbook.Worksheets("Drworkblefiles")
Drworkblefiles.Range("A1").PasteSpecial Paste:=xlPasteValues
Application.CutCopyMode = False
Data.Range("A1").AutoFilter
End Sub
Private Sub CommandButton2_Click()
Sheets("Data").Range("A1:AJ" & Sheets("Data").Range("A1").End(xlDown).Row).Clear
MsgBox "Please paste new data in data sheet"
End Sub
The snippet you're showing doesn't seem to be directly responsible for the error.
This is how you can CAUSE the error:
namespace MyNameSpace
{
int i; <-- THIS NEEDS TO BE INSIDE THE CLASS
class MyClass
{
...
}
}
If you don't immediately see what is "outside" the class, this may be due to misplaced or extra closing bracket(s) }
.
The HTTP status code you return should depend on the type of error that has occurred. If an ID doesn't exist in the database, return a 404; if a user doesn't have enough privileges to make that Ajax call, return a 403; if the database times out before being able to find the record, return a 500 (server error).
jQuery automatically detects such error codes, and runs the callback function that you define in your Ajax call. Documentation: http://api.jquery.com/jQuery.ajax/
Short example of a $.ajax
error callback:
$.ajax({
type: 'POST',
url: '/some/resource',
success: function(data, textStatus) {
// Handle success
},
error: function(xhr, textStatus, errorThrown) {
// Handle error
}
});
CultureInfo.CurrentCulture.DateTimeFormat.GetMonthName(1);
See Here for more details.
Or
DateTime dt = DateTime.Now;
Console.WriteLine( dt.ToString( "MMMM" ) );
Or if you want to get the culture-specific abbreviated name.
GetAbbreviatedMonthName(1);
You can use strlen. Size is determined by the terminating null-character, so passed string should be valid.
If you want to get size of memory buffer, that contains your string, and you have pointer to it:
sizeof
to get its size.If you are confused about difference between dynamic and static arrays, check this.
I have two points for the implicit join (The second example):
While the other posters addressed why is True
does what it does, I wanted to respond to this part of your post:
I thought Python treats anything with value as True. Why is this happening?
Coming from Java, I got tripped up by this, too. Python does not treat anything with a value as True
. Witness:
if 0:
print("Won't get here")
This will print nothing because 0 is treated as False
. In fact, zero of any numeric type evaluates to False
. They also made decimal
work the way you'd expect:
from decimal import *
from fractions import *
if 0 or 0.0 or 0j or Decimal(0) or Fraction(0, 1):
print("Won't get here")
Here are the other value which evaluate to False
:
if None or False or '' or () or [] or {} or set() or range(0):
print("Won't get here")
Sources:
You would detect the requesting browsers user agent string, and then decide based on what it is if it's coming from a mobile browser or not. This device is not perfect, and never will be due to the fact that user agents aren't standardized for mobile devices (at least not to my knowledge).
This site will help you create the code: http://www.hand-interactive.com/resources/detect-mobile-javascript.htm
Example:
You could get the user agent in javascript by doing this:
var uagent = navigator.userAgent.toLowerCase();
And then do the check's in the same format as this (just using iPhone as a quick example, but others would need to be a little bit different)
function DetectIphone()
{
if (uagent.search("iphone") > -1)
alert('true');
else
alert('false');
}
Edit
You'd create a simple HTML page like so:
<html>
<head>
<title>Mobile Detection</title>
</head>
<body>
<input type="button" OnClick="DetectIphone()" value="Am I an Iphone?" />
</body>
</html>
<script>
function DetectIphone()
{
var uagent = navigator.userAgent.toLowerCase();
if (uagent.search("iphone") > -1)
alert('true');
else
alert('false');
}
</script>
You can try this code .
private enum DownloadType {
AUDIO , VIDEO , AUDIO_AND_VIDEO ;
}
You can use this enumeration as like this : DownloadType.AUDIO.ordinal()
. Hope this code snippet will help you .
Use the below method to allow css styles in innerhtml
.
import { DomSanitizer, SafeHtml } from '@angular/platform-browser';
.
.
.
.
html: SafeHtml;
constructor(protected _sanitizer: DomSanitizer) {
this.html = this._sanitizer.bypassSecurityTrustHtml(`
<html>
<head></head>
<body>
<div style="display:flex; color: blue;">
<div>
<h1>Hello World..!!!!!</h1>
</div>
</div>
</body>
</html>`);
}
Example code stackblitz
Or use the below method to write directly in html. https://gist.github.com/klihelp/4dcac910124409fa7bd20f230818c8d1
For a similar project, to get a new key, I make a wrapper function around a random string generator that calls the generator until I get a string that hasn't already been used in my hashtable. This method will slow down once your name space starts to get full, but as you have said, even with only 6 characters, you have plenty of namespace to work with.
This was enough for me:
sudo apt-get install build-essential
If its in a landscape then you will be needing more width and less height! That's just what all websites have.
Lets go with a basic first then the rest!
The basic CSS:
By CSS you can do this,
#body {
width: 100%;
height: 100%;
}
Here you are using a div with id
body, as:
<body>
<div id="body>
all the text would go here!
</div>
</body>
Then you can have a web page with 100%
height and width.
What if he tries to resize the window?
The issues pops up, what if he tries to resize the window? Then all the elements inside #body
would try to mess up the UI. For that you can write this:
#body {
height: 100%;
width: 100%;
}
And just add min-height
max-height
min-width
and max-width
.
This way, the page element would stay at the place they were at the page load.
Using JavaScript:
Using JavaScript, you can control the UI, use jQuery as:
$('#body').css('min-height', '100%');
And all other remaining CSS properties, and JS will take care of the User Interface when the user is trying to resize the window.
How to not add scroll to the web page:
If you are not trying to add a scroll, then you can use this JS
$('#body').css('min-height', screen.height); // or anyother like window.height
This way, the document will get a new height whenever the user would load the page.
Second option is better, because when users would have different screen resolutions they would want a CSS or Style sheet created for their own screen. Not for others!
Tip: So try using JS to find current Screen size and edit the page! :)
Before assigning a new column, if you have indexed data, you need to sort the index. At least in my case I had to:
data.set_index(['index_column'], inplace=True)
"if index is unsorted, assignment of a new column will fail"
data.sort_index(inplace = True)
data.loc['index_value1', 'column_y'] = np.random.randn(data.loc['index_value1', 'column_x'].shape[0])
Based on my highly scientific and accurate experiment, it tops out on my machine well before 1,000,000,000 characters. (I'm still running the code below to get a better pinpoint).
UPDATE:
After a few hours, I've given up. Final results: Can go a lot bigger than 100,000,000 characters, instantly given System.OutOfMemoryException
at 1,000,000,000 characters.
using System;
using System.Collections.Generic;
public class MyClass
{
public static void Main()
{
int i = 100000000;
try
{
for (i = i; i <= int.MaxValue; i += 5000)
{
string value = new string('x', i);
//WL(i);
}
}
catch (Exception exc)
{
WL(i);
WL(exc);
}
WL(i);
RL();
}
#region Helper methods
private static void WL(object text, params object[] args)
{
Console.WriteLine(text.ToString(), args);
}
private static void RL()
{
Console.ReadLine();
}
private static void Break()
{
System.Diagnostics.Debugger.Break();
}
#endregion
}
To get all the counts for all the columns in a dataframe, it's just df.count()
set -x
Prints a trace of simple commands, for commands, case commands, select commands, and arithmetic for commands and their arguments or associated word lists after they are expanded and before they are executed. The value of the PS4 variable is expanded and the resultant value is printed before the command and its expanded arguments.
[source]
set -x
echo `expr 10 + 20 `
+ expr 10 + 20
+ echo 30
30
set +x
echo `expr 10 + 20 `
30
Above example illustrates the usage of set -x
. When it is used, above arithmetic expression has been expanded. We could see how a singe line has been evaluated step by step.
expr
has been evaluated.echo
has been evaluated.To know more about set ? visit this link
when it comes to your shell script,
[ "$DEBUG" == 'true' ] && set -x
Your script might have been printing some additional lines of information when the execution mode selected as DEBUG
. Traditionally people used to enable debug mode when a script called with optional argument such as -d
Your format specifier is incorrect. From the printf()
man page on my machine:
0
A zero '0
' character indicating that zero-padding should be used rather than blank-padding. A '-
' overrides a '0
' if both are used;Field Width: An optional digit string specifying a field width; if the output string has fewer characters than the field width it will be blank-padded on the left (or right, if the left-adjustment indicator has been given) to make up the field width (note that a leading zero is a flag, but an embedded zero is part of a field width);
Precision: An optional period, '
.
', followed by an optional digit string giving a precision which specifies the number of digits to appear after the decimal point, for e and f formats, or the maximum number of characters to be printed from a string; if the digit string is missing, the precision is treated as zero;
For your case, your format would be %09.3f
:
#include <stdio.h>
int main(int argc, char **argv)
{
printf("%09.3f\n", 4917.24);
return 0;
}
Output:
$ make testapp
cc testapp.c -o testapp
$ ./testapp
04917.240
Note that this answer is conditional on your embedded system having a printf()
implementation that is standard-compliant for these details - many embedded environments do not have such an implementation.
Your formula looks fine. Maybe the value you are looking for is not in the first column of the second table?
If the second sheet is in another workbook, you need to add a Workbook reference to your formula:
=VLOOKUP(M3,[Book1]Sheet1!$A$2:$Q$47,13,FALSE)
Case C) is the fastest. Having this as an extension:
Public Module MyExtensions
<Extension()> _
Public Sub Add(Of T)(ByRef arr As T(), item As T)
Array.Resize(arr, arr.Length + 1)
arr(arr.Length - 1) = item
End Sub
End Module
Usage:
Dim arr As Integer() = {1, 2, 3}
Dim newItem As Integer = 4
arr.Add(newItem)
' --> duration for adding 100.000 items: 1 msec
' --> duration for adding 100.000.000 items: 1168 msec
I can carry out some cleanups before exiting. What is the best way of doing this Thats is the real goal: trap exit, to make your own stuff. And neigther answers above not makeing it right. Because, Ctrl+C is just one of many ways to exiting app.
What in dotnet c# is needed for it - so called cancellation token passed to Host.RunAsync(ct)
and then, in exit signals traps, for Windows it would be
private static readonly CancellationTokenSource cts = new CancellationTokenSource();
public static int Main(string[] args)
{
// For gracefull shutdown, trap unload event
AppDomain.CurrentDomain.ProcessExit += (sender, e) =>
{
cts.Cancel();
exitEvent.Wait();
};
Console.CancelKeyPress += (sender, e) =>
{
cts.Cancel();
exitEvent.Wait();
};
host.RunAsync(cts);
Console.WriteLine("Shutting down");
exitEvent.Set();
return 0;
}
...
Be careful with that.
But you can use the rebase command
git rebase -i HEAD~2
A vi
will open and all you have to do is delete the line with the commit. Also can read instructions that were shown in proper edition @ vi
. A couple of things can be performed on this mode.
Try this , if you are using PHP 5.3+,
$a_date = "2009-11-23";
$date = new DateTime($a_date);
$date->modify('last day of this month');
echo $date->format('Y-m-d');
For finding next month last date, modify as follows,
$date->modify('last day of 1 month');
echo $date->format('Y-m-d');
and so on..
I figured out myself.
cmp
calls ComputeBetasAndNuHat
which returns a list which has objective
as minusloglik
So I can change the function cmp
to get this value.
I know this is a bit late, but if this helps anybody, I think you could add a column to your data that calculates if the probability is ">='PivotSheet'$D$2"
(reference a cell on the pivot table
sheet).
Then, add that column to your pivot table and use the new column as a true/false
filter.
You can then change the value stored in the referenced cell to update your probability threshold.
If I understood your question right, this may get you what you wanted. The filter value would be displayed on the sheet with the pivot and can be changed to suit any quick changes to your probability threshold. The T/F Filter can be labeled "Above/At Probability Threshold" or something like that.
I've used this to do something similar. It was handy to have the cell reference on the Pivot table sheet so I could update the value and refresh the pivot to quickly modify the results. The people I did that for couldn't make up their minds on what that threshold should be.
As noted before git-rebase(1) is your friend. Assuming the commits are in your master
branch, you would do:
git rebase --onto master~3 master~2 master
Before:
1---2---3---4---5 master
After:
1---2---4'---5' master
From git-rebase(1):
A range of commits could also be removed with rebase. If we have the following situation:
E---F---G---H---I---J topicA
then the command
git rebase --onto topicA~5 topicA~3 topicA
would result in the removal of commits F and G:
E---H'---I'---J' topicA
This is useful if F and G were flawed in some way, or should not be part of topicA. Note that the argument to --onto and the parameter can be any valid commit-ish.
Am I getting it because the act of calling it via e.extractAll("th") also passes in self as an argument?
Yes, that's precisely it. If you like, the first parameter is the object name, e
that you are calling it with.
And if so, by removing the self in the call, would I be making it some kind of class method that can be called like Extractor.extractAll("th")?
Not quite. A classmethod needs the @classmethod
decorator, and that accepts the class as the first paramater (usually referenced as cls
). The only sort of method that is given no automatic parameter at all is known as a staticmethod, and that again needs a decorator (unsurprisingly, it's @staticmethod
). A classmethod is used when it's an operation that needs to refer to the class itself: perhaps instantiating objects of the class; a staticmethod is used when the code belongs in the class logically, but requires no access to class or instance.
But yes, both staticmethods and classmethods can be called by referencing the classname as you describe: Extractor.extractAll("th")
.
public boolean empty() {
boolean isEmpty = true;
int i = 0;
for (int j = 0; j < array.length; j++) {
if (array[j] != 0) {
i++;
}
}
if (i != 0) {
isEmpty = false;
}
return isEmpty;
}
This is as close as I got to checking if an int array is empty. Although this will not work when the ints in the array are actually zero. It'll work for {1,2,3}, and it'll still return false if {2,0} but {0} will return true
I don't think it is very important to find the location of Svcutil.exe. You can use Visual Studio Command prompt to execute directly without its absolute path,
Syntax:
svcutil.exe /language:[vb|cs] /out:[YourClassName].[cs|vb] /config:[YourAppConfigFile.config] [YourServiceAddress]
example:
svcutil.exe /language:cs /out:MyClientClass.cs /config:app.config http://localhost:8370/MyService/
Sadly, straight from google, which is where you will want to download if your company firewall blocks other sources, Release 1.6 r1 September 2009 is the latest SDK they have.
If you use "Developer Command Prompt" you can just type WcfTestClient
to start it or type where wcftestclient
to find the location.
For JavaScript arrays, you use push()
.
var a = [];
a.push(12);
a.push(32);
For jQuery objects, there's add()
.
$('div.test').add('p.blue');
Note that while push()
modifies the original array in-place, add()
returns a new jQuery object, it does not modify the original one.
The background color property is ignored on a UINavigationBar
, so if you want to adjust the look and feel you either have to use the tintColor
or call some of the other methods listed under "Customizing the Bar Appearance" of the UINavigationBar class reference (like setBackgroundImage:forBarMetrics:
).
Be aware that the tintColor
property works differently in iOS 7, so if you want a consistent look between iOS 7 and prior version using a background image might be your best bet. It's also worth mentioning that you can't configure the background image in the Storyboard, you'll have to create an IBOutlet
to your UINavigationBar
and change it in viewDidLoad
or some other appropriate place.
In case of Request to a REST Service:
You need to allow the CORS (cross origin sharing of resources) on the endpoint of your REST Service with Spring annotation:
@CrossOrigin(origins = "http://localhost:8080")
Very good tutorial: https://spring.io/guides/gs/rest-service-cors/
If you want to copy from searchContent to content, then code should be as follows
BeanUtils.copyProperties(content, searchContent);
You need to reverse the parameters as above in your code.
From API,
public static void copyProperties(Object dest, Object orig)
throws IllegalAccessException,
InvocationTargetException)
Parameters:
dest - Destination bean whose properties are modified
orig - Origin bean whose properties are retrieved
<?php echo substr($string, 0, strlen($string) - 3); ?>
you can write .WorkbookConnection.Delete after .Refresh BackgroundQuery:=False this will delete text file external connection.
To specify more than one namespace to provide prefixes, use something like:
@javax.xml.bind.annotation.XmlSchema(
namespace = "urn:oecd:ties:cbc:v1",
elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED,
xmlns ={@XmlNs(prefix="cbc", namespaceURI="urn:oecd:ties:cbc:v1"),
@XmlNs(prefix="iso", namespaceURI="urn:oecd:ties:isocbctypes:v1"),
@XmlNs(prefix="stf", namespaceURI="urn:oecd:ties:stf:v4")})
... in package-info.java
Set-ExecutionPolicy Unrestricted -Scope CurrentUser
This will set the execution policy for the current user (stored in HKEY_CURRENT_USER) rather than the local machine (HKEY_LOCAL_MACHINE). This is useful if you don't have administrative control over the computer.
Since most of us like oneliners:
Convert.ToBase64String(File.ReadAllBytes(imageFilepath));
If you need it as Base64 byte array:
Encoding.ASCII.GetBytes(Convert.ToBase64String(File.ReadAllBytes(imageFilepath)));
document.getElementById('header').style.width = '50%';
If you are using Firebug or the Chrome/Safari Developer tools, execute the above in the console, and you'll see the Stack Overflow header shrink by 50%.
Just putting this here in case it helps someone, my case was different and a bit of an odd mix. I was getting this on a request that was accessed via superagent - the problem had nothing to do with certificates (which were setup properly) and all to do with the fact that I was then passing the superagent result through the async module's waterfall callback. To fix: Instead of passing the entire result, just pass result.body
through the waterfall's callback.
var elem = document.querySelector(".a.b");
While the EGit plugin for Eclipse is a good option, an even better one would be to learn to use git bash -- i.e., git from the command line. It isn't terribly difficult to learn the very basics of git, and it is often very beneficial to understand some basic operations before relying on a GUI to do it for you. But to answer your question:
First things first, download git from http://git-scm.com/. Then go to http://github.com/ and create an account and repository.
On your machine, first you will need to navigate to the project folder using git bash. When you get there you do:
git init
which initiates a new git repository in that directory.
When you've done that, you need to register that new repo with a remote (where you'll upload -- push -- your files to), which in this case will be github. This assumes you have already created a github repository. You'll get the correct URL from your repo in GitHub.
git remote add origin https://github.com/[username]/[reponame].git
You need to add you existing files to your local commit:
git add . # this adds all the files
Then you need to make an initial commit, so you do:
git commit -a -m "Initial commit" # this stages your files locally for commit.
# they haven't actually been pushed yet
Now you've created a commit in your local repo, but not in the remote one. To put it on the remote, you do the second line you posted:
git push -u origin --all
I was unable to find name of an error for given code when developing in Swift. For that reason I paste minus codes for NSURLErrorDomain
taken from NSURLError.h
/*!
@enum NSURL-related Error Codes
@abstract Constants used by NSError to indicate errors in the NSURL domain
*/
NS_ENUM(NSInteger)
{
NSURLErrorUnknown = -1,
NSURLErrorCancelled = -999,
NSURLErrorBadURL = -1000,
NSURLErrorTimedOut = -1001,
NSURLErrorUnsupportedURL = -1002,
NSURLErrorCannotFindHost = -1003,
NSURLErrorCannotConnectToHost = -1004,
NSURLErrorNetworkConnectionLost = -1005,
NSURLErrorDNSLookupFailed = -1006,
NSURLErrorHTTPTooManyRedirects = -1007,
NSURLErrorResourceUnavailable = -1008,
NSURLErrorNotConnectedToInternet = -1009,
NSURLErrorRedirectToNonExistentLocation = -1010,
NSURLErrorBadServerResponse = -1011,
NSURLErrorUserCancelledAuthentication = -1012,
NSURLErrorUserAuthenticationRequired = -1013,
NSURLErrorZeroByteResource = -1014,
NSURLErrorCannotDecodeRawData = -1015,
NSURLErrorCannotDecodeContentData = -1016,
NSURLErrorCannotParseResponse = -1017,
NSURLErrorAppTransportSecurityRequiresSecureConnection NS_ENUM_AVAILABLE(10_11, 9_0) = -1022,
NSURLErrorFileDoesNotExist = -1100,
NSURLErrorFileIsDirectory = -1101,
NSURLErrorNoPermissionsToReadFile = -1102,
NSURLErrorDataLengthExceedsMaximum NS_ENUM_AVAILABLE(10_5, 2_0) = -1103,
// SSL errors
NSURLErrorSecureConnectionFailed = -1200,
NSURLErrorServerCertificateHasBadDate = -1201,
NSURLErrorServerCertificateUntrusted = -1202,
NSURLErrorServerCertificateHasUnknownRoot = -1203,
NSURLErrorServerCertificateNotYetValid = -1204,
NSURLErrorClientCertificateRejected = -1205,
NSURLErrorClientCertificateRequired = -1206,
NSURLErrorCannotLoadFromNetwork = -2000,
// Download and file I/O errors
NSURLErrorCannotCreateFile = -3000,
NSURLErrorCannotOpenFile = -3001,
NSURLErrorCannotCloseFile = -3002,
NSURLErrorCannotWriteToFile = -3003,
NSURLErrorCannotRemoveFile = -3004,
NSURLErrorCannotMoveFile = -3005,
NSURLErrorDownloadDecodingFailedMidStream = -3006,
NSURLErrorDownloadDecodingFailedToComplete =-3007,
NSURLErrorInternationalRoamingOff NS_ENUM_AVAILABLE(10_7, 3_0) = -1018,
NSURLErrorCallIsActive NS_ENUM_AVAILABLE(10_7, 3_0) = -1019,
NSURLErrorDataNotAllowed NS_ENUM_AVAILABLE(10_7, 3_0) = -1020,
NSURLErrorRequestBodyStreamExhausted NS_ENUM_AVAILABLE(10_7, 3_0) = -1021,
NSURLErrorBackgroundSessionRequiresSharedContainer NS_ENUM_AVAILABLE(10_10, 8_0) = -995,
NSURLErrorBackgroundSessionInUseByAnotherProcess NS_ENUM_AVAILABLE(10_10, 8_0) = -996,
NSURLErrorBackgroundSessionWasDisconnected NS_ENUM_AVAILABLE(10_10, 8_0)= -997,
};
I had a similar issue, and following previous answers (thanks!), I was able to search and find how to handle correctly the ThreadPoolExecutor terminaison.
In my case, that just fix my progressive increase of similar blocked threads:
ExecutorService::awaitTermination(x, TimeUnit)
and ExecutorService::shutdownNow()
(if necessary) in my finally clause.For information, I've used the following commands to detect thread count & list locked threads:
ps -u javaAppuser -L|wc -l
jcmd `ps -C java -o pid=` Thread.print >> threadPrintDayA.log
jcmd `ps -C java -o pid=` Thread.print >> threadPrintDayAPlusOne.log
cat threadPrint*.log |grep "pool-"|wc -l
Run it in parallel with
cat text_file.txt | parallel --gnu "wget {}"
Warning
Do not use this as some kind of security measurement.
The encryption mechanism in this post is a One-time pad, which means that the secret key can be easily recovered by an attacker using 2 encrypted messages. XOR 2 encrypted messages and you get the key. That simple!
Pointed out by Moussa
I am using Sun's Base64Encoder/Decoder which is to be found in Sun's JRE, to avoid yet another JAR in lib. That's dangerous from point of using OpenJDK or some other's JRE. Besides that, is there another reason I should consider using Apache commons lib with Encoder/Decoder?
public class EncryptUtils {
public static final String DEFAULT_ENCODING = "UTF-8";
static BASE64Encoder enc = new BASE64Encoder();
static BASE64Decoder dec = new BASE64Decoder();
public static String base64encode(String text) {
try {
return enc.encode(text.getBytes(DEFAULT_ENCODING));
} catch (UnsupportedEncodingException e) {
return null;
}
}//base64encode
public static String base64decode(String text) {
try {
return new String(dec.decodeBuffer(text), DEFAULT_ENCODING);
} catch (IOException e) {
return null;
}
}//base64decode
public static void main(String[] args) {
String txt = "some text to be encrypted";
String key = "key phrase used for XOR-ing";
System.out.println(txt + " XOR-ed to: " + (txt = xorMessage(txt, key)));
String encoded = base64encode(txt);
System.out.println(" is encoded to: " + encoded + " and that is decoding to: " + (txt = base64decode(encoded)));
System.out.print("XOR-ing back to original: " + xorMessage(txt, key));
}
public static String xorMessage(String message, String key) {
try {
if (message == null || key == null) return null;
char[] keys = key.toCharArray();
char[] mesg = message.toCharArray();
int ml = mesg.length;
int kl = keys.length;
char[] newmsg = new char[ml];
for (int i = 0; i < ml; i++) {
newmsg[i] = (char)(mesg[i] ^ keys[i % kl]);
}//for i
return new String(newmsg);
} catch (Exception e) {
return null;
}
}//xorMessage
}//class
If you want to do it in java code just use this line to disable it:
editText.setEnabled(false);
And this to enable it:
editText.setEnabled(true);
Looks like the path you gave doesn't have any bootstrap files in them.
href="~/lib/bootstrap/dist/css/bootstrap.min.css"
Make sure the files exist over there , else point the files to the correct path, which should be in your case
href="~/node_modules/bootstrap/dist/css/bootstrap.min.css"
You need to use the new android.animation
framework (object animators) with FragmentTransaction.setCustomAnimations
as well as FragmentTransaction.setTransition
.
Here's an example on using setCustomAnimations
from ApiDemos' FragmentHideShow.java:
ft.setCustomAnimations(android.R.animator.fade_in, android.R.animator.fade_out);
and here's the relevant animator XML from res/animator/fade_in.xml:
<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:interpolator/accelerate_quad"
android:valueFrom="0"
android:valueTo="1"
android:propertyName="alpha"
android:duration="@android:integer/config_mediumAnimTime" />
Note that you can combine multiple animators using <set>
, just as you could with the older animation framework.
EDIT: Since folks are asking about slide-in/slide-out, I'll comment on that here.
You can of course animate the translationX
, translationY
, x
, and y
properties, but generally slides involve animating content to and from off-screen. As far as I know there aren't any transition properties that use relative values. However, this doesn't prevent you from writing them yourself. Remember that property animations simply require getter and setter methods on the objects you're animating (in this case views), so you can just create your own getXFraction
and setXFraction
methods on your view subclass, like this:
public class MyFrameLayout extends FrameLayout {
...
public float getXFraction() {
return getX() / getWidth(); // TODO: guard divide-by-zero
}
public void setXFraction(float xFraction) {
// TODO: cache width
final int width = getWidth();
setX((width > 0) ? (xFraction * width) : -9999);
}
...
}
Now you can animate the 'xFraction' property, like this:
res/animator/slide_in.xml:
<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/linear_interpolator"
android:valueFrom="-1.0"
android:valueTo="0"
android:propertyName="xFraction"
android:duration="@android:integer/config_mediumAnimTime" />
Note that if the object you're animating in isn't the same width as its parent, things won't look quite right, so you may need to tweak your property implementation to suit your use case.
use the function norm in scipy.linalg (or numpy.linalg)
>>> from scipy import linalg as LA
>>> a = 10*NP.random.randn(6)
>>> a
array([ 9.62141594, 1.29279592, 4.80091404, -2.93714318,
17.06608678, -11.34617065])
>>> LA.norm(a)
23.36461979210312
>>> # compare with OP's function:
>>> import math
>>> mag = lambda x : math.sqrt(sum(i**2 for i in x))
>>> mag(a)
23.36461979210312
Try to set
this.MinimumSize = new Size(140, 480);
this.MaximumSize = new Size(140, 480);
u = urllib2.urlopen('http://myserver/inout-tracker', data)
h.request('POST', '/inout-tracker/index.php', data, headers)
Using the path /inout-tracker
without a trailing /
doesn't fetch index.php
. Instead the server will issue a 302
redirect to the version with the trailing /
.
Doing a 302 will typically cause clients to convert a POST to a GET request.
My biggest concern with not checking folder node_modules into Git is that 10 years down the road, when your production application is still in use, npm may not be around. Or npm might become corrupted; or the maintainers might decide to remove the library that you rely on from their repository; or the version you use might be trimmed out.
This can be mitigated with repository managers like Maven, because you can always use your own local Nexus (Sonatype) or Artifactory to maintain a mirror with the packages that you use. As far as I understand, such a system doesn't exist for npm. The same goes for client-side library managers like Bower and Jam.js.
If you've committed the files to your own Git repository, then you can update them when you like, and you have the comfort of repeatable builds and the knowledge that your application won't break because of some third-party action.
Check https://softwareengineering.stackexchange.com/a/253723
if(value) {
}
will evaluate to true if value is not:
null
undefined
NaN
empty string ("")
0
false
For linuxes I've figured out that ECU could be measured by sysbench:
sysbench --num-threads=128 --test=cpu --cpu-max-prime=50000 --max-requests=50000 run
Total time (t) should be calculated by formula:
ECU=1925/t
And my example test results:
| instance type | time | ECU |
|-------------------|----------|---------|
| m1.small | 1735,62 | 1 |
| m3.xlarge | 147,62 | 13 |
| m3.2xlarge | 74,61 | 26 |
| r3.large | 295,84 | 7 |
| r3.xlarge | 148,18 | 13 |
| m4.xlarge | 146,71 | 13 |
| m4.2xlarge | 73,69 | 26 |
| c4.xlarge | 123,59 | 16 |
| c4.2xlarge | 61,91 | 31 |
| c4.4xlarge | 31,14 | 62 |
Try it with the browser in incognito mode first. If incognito works it's probably an extension or settings issue with the browser(s) and not a server issue. Hopefully this saves someone the headache I just went through.
BSD's find
implementation on macOS is different from GNU find - this is compatible with both BSD and GNU find. Start with a globbing implementation, using -name
and the -o
for or - Put this function in your .bashrc
file:
pyclean () {
find . -type f -name '*.py[co]' -delete -o -type d -name __pycache__ -delete
}
Then cd
to the directory you want to recursively clean, and type pyclean
.
This is a GNU find, only (i.e. Linux) solution, but I feel it's a little nicer with the regex:
pyclean () {
find . -regex '^.*\(__pycache__\|\.py[co]\)$' -delete
}
On Windows, you probably don't even have find
. You do, however, probably have Python 3, which starting in 3.4 has the convenient pathlib
module:
python3 -Bc "import pathlib; [p.unlink() for p in pathlib.Path('.').rglob('*.py[co]')]"
python3 -Bc "import pathlib; [p.rmdir() for p in pathlib.Path('.').rglob('__pycache__')]"
The -B
flag tells Python not to write .pyc
files. (See also the PYTHONDONTWRITEBYTECODE
environment variable.)
The above abuses list comprehensions for looping, but when using python -c
, style is rather a secondary concern. Alternatively we could abuse (for example) __import__
:
python3 -Bc "for p in __import__('pathlib').Path('.').rglob('*.py[co]'): p.unlink()"
python3 -Bc "for p in __import__('pathlib').Path('.').rglob('__pycache__'): p.rmdir()"
The top answer used to say:
find . | grep -E "(__pycache__|\.pyc|\.pyo$)" | xargs rm -rf
This would seem to be less efficient because it uses three processes. find
takes a regular expression, so we don't need a separate invocation of grep
. Similarly, it has -delete
, so we don't need a separate invocation of rm
—and contrary to a comment here, it will delete non-empty directories so long as they get emptied by virtue of the regular expression match.
From the xargs
man page:
find /tmp -depth -name core -type f -delete
Find files named core in or below the directory /tmp and delete them, but more efficiently than in the previous example (because we avoid the need to use fork(2) and exec(2) to launch rm and we don't need the extra xargs process).
@ewomack has a great answer for C#, unless you don't need extra object values. In my case, I ended up using something similar to:
@Html.ActionLink("Delete", "DeleteList", "List", new object { },
new { @class = "delete"})
You could also use the argwhere
function in Numpy. For example:
i) Find the first "l" in "helloworld":
import numpy as np
l = list("helloworld") # Create list
i = np.argwhere(np.array(l)=="l") # i = array([[2],[3],[8]])
index_of_first = i.min()
ii) Find first random number > 0.1
import numpy as np
r = np.random.rand(50) # Create random numbers
i = np.argwhere(r>0.1)
index_of_first = i.min()
iii) Find the last random number > 0.1
import numpy as np
r = np.random.rand(50) # Create random numbers
i = np.argwhere(r>0.1)
index_of_last = i.max()
In order of activity, demos/examples available, and simplicity:
Related:
why not simply
new Date (timestamp);
A date is a date, the formatting of it is a different matter.
None of the solution above worked for me. But following did :
To get the version of JVM currently running the program
System.out.println(Runtime.class.getPackage().getImplementationVersion());
One of the simplest explanation given on Brilliant's wiki:
Abstract data types, commonly abbreviated ADTs, are a way of classifying data structures based on how they are used and the behaviors they provide. They do not specify how the data structure must be implemented or laid out in memory, but simply provide a minimal expected interface and set of behaviors. For example, a stack is an abstract data type that specifies a linear data structure with LIFO (last in, first out) behavior. Stacks are commonly implemented using arrays or linked lists, but a needlessly complicated implementation using a binary search tree is still a valid implementation. To be clear, it is incorrect to say that stacks are arrays or vice versa. An array can be used as a stack. Likewise, a stack can be implemented using an array.
Since abstract data types don't specify an implementation, this means it's also incorrect to talk about the time complexity of a given abstract data type. An associative array may or may not have O(1) average search times. An associative array that is implemented by a hash table does have O(1) average search times.
Example for ADT: List - can be implemented using Array and LinkedList, Queue, Deque, Stack, Associative array, Set.
Its simple, just make sure the data type in your columns are the same. For e.g. I faced the same error, that and an another error:
Error in
contrasts<-
(*tmp*
, value = contr.funs[1 + isOF[nn]]) : contrasts can be applied only to factors with 2 or more levels
So, I went back to my excel file or csv file, set a filter on the variable throwing me an error and checked if the distinct datatypes are the same. And... Oh! it had numbers and strings, so I converted numbers to string and it worked just fine for me.
The object name is not very important. what you should be focusing at is the variable that stores the lineedit object (le) and your pushbutton object(pb)
QObject(self.pb, SIGNAL("clicked()"), self.button_clicked) def button_clicked(self): self.le.setText("shost")
I think this is what you want. I hope i got your question correctly :)
you can search this file : resetroot.bat
just double click it so that your root accout will be reset and all the privileges are turned into YES
In IntelliJ IDEA:
In File Menu
? Project Structure
? Project
, change Project Language Level
to 8.0 - Lambdas, type annotations etc.
For Android 3.0+ Go File
? Project Structure
? Module
? app
and In Properties Tab set Source Compatibility
and Target Compatibility
to 1.8 (Java 8)
Screenshot:
in JAXB that is part of JDK1.6
marshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);
If you are reaching the mac connection limit
go to /etc/my.cnf
and under the [mysqld]
section add
max_connections = 500
and restart MySQL.
Under Linux there is an easier way to set the default environment by modifying ~/.bashrc
or ~/.bash_profile
At the end you'll find something like
# added by Anaconda 2.1.0 installer
export PATH="~/anaconda/bin:$PATH"
Replace it with
# set python3 as default
export PATH="~/anaconda/envs/python3/bin:$PATH"
and thats all there is to it.
See my answer to this question: Detect support for background-attachment: fixed?
Use this code between two words:
& vbCrLf &
Using this, the next word displays on the next line.
What you really want to do is bind the event handler for the capture phase of the event. However, that isn't supported in IE as far as I know, so that might not be all that useful.
http://www.quirksmode.org/js/events_order.html
Related questions:
Use the below link for wrap into two lines check the link
Insert ellipsis (...) into HTML tag if content too wide
That needs the below jquery
If you want to set this option for all of your repos, use the --global
option.
git config --global core.filemode false
If this does not work you are probably using a newer version of git so try the --add
option.
git config --add --global core.filemode false
If you run it without the --global option and your working directory is not a repo, you'll get
error: could not lock config file .git/config: No such file or directory
While creating the user like 'myuser'@'localhost', the user gets limited to be connected only from localhost. Create a user only for remote access and use your remote client IP address from where you will be connecting to the MySQL server. If you can bear the risk of allowing connections from all remote hosts (usually when using dynamic IP address), you can use 'myuser'@'%'. I did this, and also removed bind_address from /etc/mysql/mysql.cnf (Ubuntu) and now it connects flawlessly.
mysql> select host,user from mysql.user;
+-----------+-----------+
| host | user |
+-----------+-----------+
| % | myuser |
| localhost | mysql.sys |
| localhost | root |
+-----------+-----------+
3 rows in set (0.00 sec)
Swift 5.1 Custom Object/Type
// MARK: - NotificationName
// Extending notification name to avoid string errors.
extension Notification.Name {
static let yourNotificationName = Notification.Name("yourNotificationName")
}
// MARK: - CustomObject
class YourCustomObject {
// Any stuffs you would like to set in your custom object as always.
init() {}
}
// MARK: - Notification Sender Class
class NotificatioSenderClass {
// Just grab the content of this function and put it to your function responsible for triggering a notification.
func postNotification(){
// Note: - This is the important part pass your object instance as object parameter.
let yourObjectInstance = YourCustomObject()
NotificationCenter.default.post(name: .yourNotificationName, object: yourObjectInstance)
}
}
// MARK: -Notification Receiver class
class NotificationReceiverClass: UIViewController {
// MARK: - ViewController Lifecycle
override func viewDidLoad() {
super.viewDidLoad()
// Register your notification listener
NotificationCenter.default.addObserver(self, selector: #selector(didReceiveNotificationWithCustomObject), name: .yourNotificationName, object: nil)
}
// MARK: - Helpers
@objc private func didReceiveNotificationWithCustomObject(notification: Notification){
// Important: - Grab your custom object here by casting the notification object.
guard let yourPassedObject = notification.object as? YourCustomObject else {return}
// That's it now you can use your custom object
//
//
}
// MARK: - Deinit
deinit {
// Save your memory by releasing notification listener
NotificationCenter.default.removeObserver(self, name: .yourNotificationName, object: nil)
}
}
Try to use this solution:
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome
Run regedit, Delete the key, then restart Chrome.
Using the angular.module API with an array at the end will tell angular to create a new module:
myApp.js
// It is like saying "create a new module"
angular.module('myApp.controllers', []); // Notice the empty array at the end here
Using it without the array is actually a getter function. So to seperate your controllers, you can do:
Ctrl1.js
// It is just like saying "get this module and create a controller"
angular.module('myApp.controllers').controller('Ctrlr1', ['$scope', '$http', function($scope, $http) {}]);
Ctrl2.js
angular.module('myApp.controllers').controller('Ctrlr2', ['$scope', '$http', function($scope, $http) {}]);
During your javascript imports, just make sure myApp.js is after AngularJS but before any controllers / services / etc...otherwise angular won't be able to initialize your controllers.
This will do want you want:
int num1, num2;
num1 = num2 = 5;
'num2 = 5' assignment will return the assigned value.
This allows you to do crazy things like num1 = (num2 = 5) +3;
which will assign 8 to num1, although I would not recommended doing it as not be very readable.
The correct way to change directories is actually with process.chdir(directory)
. Here's an example from the documentation:
console.log('Starting directory: ' + process.cwd());
try {
process.chdir('/tmp');
console.log('New directory: ' + process.cwd());
}
catch (err) {
console.log('chdir: ' + err);
}
This is also testable in the Node.js REPL:
[monitor@s2 ~]$ node
> process.cwd()
'/home/monitor'
> process.chdir('../');
undefined
> process.cwd();
'/home'
This solution provides a strict FixedLengthArray (ak.a. SealedArray) type signature based in Tuples.
Syntax example :
// Array containing 3 strings
let foo : FixedLengthArray<[string, string, string]>
This is the safest approach, considering it prevents accessing indexes out of the boundaries.
Implementation :
type ArrayLengthMutationKeys = 'splice' | 'push' | 'pop' | 'shift' | 'unshift' | number
type ArrayItems<T extends Array<any>> = T extends Array<infer TItems> ? TItems : never
type FixedLengthArray<T extends any[]> =
Pick<T, Exclude<keyof T, ArrayLengthMutationKeys>>
& { [Symbol.iterator]: () => IterableIterator< ArrayItems<T> > }
Tests :
var myFixedLengthArray: FixedLengthArray< [string, string, string]>
// Array declaration tests
myFixedLengthArray = [ 'a', 'b', 'c' ] // ? OK
myFixedLengthArray = [ 'a', 'b', 123 ] // ? TYPE ERROR
myFixedLengthArray = [ 'a' ] // ? LENGTH ERROR
myFixedLengthArray = [ 'a', 'b' ] // ? LENGTH ERROR
// Index assignment tests
myFixedLengthArray[1] = 'foo' // ? OK
myFixedLengthArray[1000] = 'foo' // ? INVALID INDEX ERROR
// Methods that mutate array length
myFixedLengthArray.push('foo') // ? MISSING METHOD ERROR
myFixedLengthArray.pop() // ? MISSING METHOD ERROR
// Direct length manipulation
myFixedLengthArray.length = 123 // ? READ-ONLY ERROR
// Destructuring
var [ a ] = myFixedLengthArray // ? OK
var [ a, b ] = myFixedLengthArray // ? OK
var [ a, b, c ] = myFixedLengthArray // ? OK
var [ a, b, c, d ] = myFixedLengthArray // ? INVALID INDEX ERROR
(*) This solution requires the noImplicitAny
typescript configuration directive to be enabled in order to work (commonly recommended practice)
This solution behaves as an augmentation of the Array
type, accepting an additional second parameter(Array length). Is not as strict and safe as the Tuple based solution.
Syntax example :
let foo: FixedLengthArray<string, 3>
Keep in mind that this approach will not prevent you from accessing an index out of the declared boundaries and set a value on it.
Implementation :
type ArrayLengthMutationKeys = 'splice' | 'push' | 'pop' | 'shift' | 'unshift'
type FixedLengthArray<T, L extends number, TObj = [T, ...Array<T>]> =
Pick<TObj, Exclude<keyof TObj, ArrayLengthMutationKeys>>
& {
readonly length: L
[ I : number ] : T
[Symbol.iterator]: () => IterableIterator<T>
}
Tests :
var myFixedLengthArray: FixedLengthArray<string,3>
// Array declaration tests
myFixedLengthArray = [ 'a', 'b', 'c' ] // ? OK
myFixedLengthArray = [ 'a', 'b', 123 ] // ? TYPE ERROR
myFixedLengthArray = [ 'a' ] // ? LENGTH ERROR
myFixedLengthArray = [ 'a', 'b' ] // ? LENGTH ERROR
// Index assignment tests
myFixedLengthArray[1] = 'foo' // ? OK
myFixedLengthArray[1000] = 'foo' // ? SHOULD FAIL
// Methods that mutate array length
myFixedLengthArray.push('foo') // ? MISSING METHOD ERROR
myFixedLengthArray.pop() // ? MISSING METHOD ERROR
// Direct length manipulation
myFixedLengthArray.length = 123 // ? READ-ONLY ERROR
// Destructuring
var [ a ] = myFixedLengthArray // ? OK
var [ a, b ] = myFixedLengthArray // ? OK
var [ a, b, c ] = myFixedLengthArray // ? OK
var [ a, b, c, d ] = myFixedLengthArray // ? SHOULD FAIL
This might be somewhat of a hack, but it got the job done in our case:
(0 || myfield)::integer
Explanation (Tested on Postgres 8.4):
The above mentioned expression yields NULL
for NULL-values in myfield
and 0
for empty strings (This exact behaviour may or may not fit your use case).
SELECT id, (0 || values)::integer from test_table ORDER BY id
Test data:
CREATE TABLE test_table
(
id integer NOT NULL,
description character varying,
"values" character varying,
CONSTRAINT id PRIMARY KEY (id)
)
-- Insert Test Data
INSERT INTO test_table VALUES (1, 'null', NULL);
INSERT INTO test_table VALUES (2, 'empty string', '');
INSERT INTO test_table VALUES (3, 'one', '1');
The query will yield the following result:
---------------------
|1|null |NULL|
|2|empty string|0 |
|3|one |1 |
---------------------
Whereas select only values::integer
will result in an error message.
Hope this helps.
Make that "three single comment-markers"
In C# it's ///
which as default spits out:
/// <summary>
///
/// </summary>
/// <returns></returns>
Make Executable your jar and after that double click on it on Mac OS then it works successfully.
sudo chmod +x filename.jar
Try this, I hope this works.
Use Mail::factory in the Mail PEAR package. Example.
You do not need to keep the system images unless you want to use the emulator on your desktop. Along with it you can remove other unwanted stuff to clear disk space.
Adding as an answer to my own question as I've had to narrate this to people in my team more than a few times. Hence this answer as a reference to share with other curious ones.
In the last few weeks there were several colleagues who asked me how to safely get rid of the unwanted stuff to release disk space (most of them were beginners). I redirected them to this question but they came back to me for steps. So for android beginners here is a step by step guide to safely remove unwanted stuff.
Note
First, be sure you are not going to use emulators and will always do you development on a physical device. In case you are going to need emulators, note down the API Levels and type of emulators you'll need. Do not remove those. For the rest follow the below steps:
Steps to safely clear up unwanted stuff from Android SDK folder on the disk
- Open the Stand Alone Android SDK Manager. To open do one of the following:
.
- Uncheck all items ending with "System Image". Each API Level will have more than a few. In case you need some and have figured the list already leave them checked to avoid losing them and having to re-download.
.
- Optional (may help save a marginally more amount of disk space): To free up some more space, you can also entirely uncheck unrequired API levels. Be careful again to avoid re-downloading something you are actually using in other projects.
.
- In the end make sure you have at least the following (check image below) for the remaining API levels to be able to seamlessly work with your physical device.
In the end the clean android sdk installed components should look something like this in the SDK manager.
You could write a little, very simple routine that does it, without using a regular expression:
pos
so that is points to just before the opening bracket after your for
or while
. openBr
to 0
.pos
, reading the characters at the respective positions, and increment openBr
when you see an opening bracket, and decrement it when you see a closing bracket. That will increment it once at the beginning, for the first opening bracket in "for (
", increment and decrement some more for some brackets in between, and set it back to 0
when your for
bracket closes. openBr
is 0
again.The stopping positon is your closing bracket of for(...)
. Now you can check if there is a semicolon following or not.
Make sure you use the root folder of the JDK. Don't add "\lib" to the end of the path, where tools.jar is physically located. It took me an hour to figure that one out. Also, this post will help show you where Ant is looking for tools.jar:
Why does ANT tell me that JAVA_HOME is wrong when it is not?
I'd suggest getting into one of the JS libraries out there. They ensure compatibility so you can get up and running really fast. jQuery and DOJO are both really great. To do what you're trying to do in jQuery, for example, it would go something like this:
<script type="text/javascript" language="JavaScript">
$.ajax({
url: "x.html",
context: document.body,
success: function(response) {
$("#yourDiv").html(response);
}
});
</script>
Usually I do this:
<div>
<p>
<img src='1.jpg' align='left' />
Text Here
<p>
</div>
You could also do:
for option in options:
if option == options[selected_index]:
#print
else:
#print
Although you'd run into issues if there are duplicate options.
Something like this should do it :
UPDATE table1
SET table1.Price = table2.price
FROM table1 INNER JOIN table2 ON table1.id = table2.id
You can also try this:
UPDATE table1
SET price=(SELECT price FROM table2 WHERE table1.id=table2.id);
The lack of a good way to convert between a primitive array and a collection of its corresponding wrapper type is solved by some third party libraries. Guava, a very common one, has a convenience method to do the conversion:
List<Character> characterList = Chars.asList("abc".toCharArray());
Set<Character> characterSet = new HashSet<Character>(characterList);
In httpd.conf
on /Applications/MAMP/conf/apache
, find:
<Directory />
Options Indexes FollowSymLinks
AllowOverride None
</Directory>
Replace None
with All
.
Restart MAMP servers.
This working on SQL_Server_2008 R2
Select *
from Product_sales
where From_date
between '2013-01-03' and '2013-01-09'
You can use it to raise errors as part of error-checking:
if (a < b):
raise ValueError()
Or handle some errors, and then pass them on as part of error-handling:
try:
f = open('file.txt', 'r')
except IOError:
# do some processing here
# and then pass the error on
raise
java.util.MissingResourceException: Can't find bundle for base name org.jfree.chart.LocalizationBundle, locale en_US
To the point, the exception message tells in detail that you need to have either of the following files in the classpath:
/org/jfree/chart/LocalizationBundle.properties
or
/org/jfree/chart/LocalizationBundle_en.properties
or
/org/jfree/chart/LocalizationBundle_en_US.properties
Also see the official Java tutorial about resourcebundles for more information.
But as this is actually a 3rd party managed properties file, you shouldn't create one yourself. It should be already available in the JFreeChart JAR file. So ensure that you have it available in the classpath during runtime. Also ensure that you're using the right version, the location of the propertiesfile inside the package tree might have changed per JFreeChart version.
When executing a JAR file, you can use the -cp
argument to specify the classpath. E.g.:
java -jar -cp c:/path/to/jfreechart.jar yourfile.jar
Alternatively you can specify the classpath as class-path
entry in the JAR's manifest file. You can use in there relative paths which are relative to the JAR file itself. Do not use the %CLASSPATH%
environment variable, it's ignored by JAR's and everything else which aren't executed with java.exe
without -cp
, -classpath
and -jar
arguments.
In my case, the bootstrap minified CSS was causing the issue. To make bootstrap 3.0.2 responsive in IE8 (emulated using the F12 Developer Tools) I had to:
1 - Set the X-UA-Compatible flag.
<meta http-equiv="X-UA-Compatible" content="IE=edge">
2 - Use the non-minified bootstrap.css, instead of bootstrap.min.css
<link href="/css/bootstrap.css" rel="stylesheet" />
3 - Add the respond.js (and html5shiv.js)
<!--[if lt IE 9]>
<script src="/js/html5shiv.min.js"></script>
<script src="/js/respond.min.js"></script>
<![endif]-->
If you know the text in the combo box that you want to select, just use the setCurrentText() method to select that item.
ui->comboBox->setCurrentText("choice 2");
From the Qt 5.7 documentation
The setter setCurrentText() simply calls setEditText() if the combo box is editable. Otherwise, if there is a matching text in the list, currentIndex is set to the corresponding index.
So as long as the combo box is not editable, the text specified in the function call will be selected in the combo box.
Reference: http://doc.qt.io/qt-5/qcombobox.html#currentText-prop
The calculation is simple
if you want to add 1 hour in the date .
every day have 24 hour , you can add .
select sysdate + 1/24 from dual;
if you want 1 day to add
select sysdate + 24/24 from dual;
or
select sysdate + 1 from dual;
same as for 2, 3 , 4 day
For static date you have the answer below.
Look at the length of the string after replacing the sequence
declare @s varchar(10) = 'aabaacaa'
select len(@s) - len(replace(@s, 'a', ''))
>>6
$(document).ready(); is the same as any other function. it fires once the document is ready - ie loaded. the question is about what happens when multiple $(document).ready()'s are fired not when you fire the same function within multiple $(document).ready()'s
//this
<div id="target"></div>
$(document).ready(function(){
jQuery('#target').append('target edit 1<br>');
});
$(document).ready(function(){
jQuery('#target').append('target edit 2<br>');
});
$(document).ready(function(){
jQuery('#target').append('target edit 3<br>');
});
//is the same as
<div id="target"></div>
$(document).ready(function(){
jQuery('#target').append('target edit 1<br>');
jQuery('#target').append('target edit 2<br>');
jQuery('#target').append('target edit 3<br>');
});
both will behave exactly the same. the only difference is that although the former will achieve the same results. the latter will run a fraction of a second faster and requires less typing. :)
in conclusion where ever possible only use 1 $(document).ready();
//old answer
They will both get called in order. Best practice would be to combine them. but dont worry if its not possible. the page will not explode.
For those who are using "High Contrast" windows themes but still want a regular Visual Studio theme you might notice that the theme selector drop down is disabled. You can still change it by doing the following...
This permanently sets the theme to the one you've chosen.
I just had this problem too. I closed and opened VS2015 and it "fixed" the issue...
Think like this:
class Animal { /* Some virtual members */ };
class Dog: public Animal {};
class Cat: public Animal {};
Dog dog;
Cat cat;
Animal& AnimalRef1 = dog; // Notice no cast required. (Dogs and cats are animals).
Animal& AnimalRef2 = cat;
Animal* AnimalPtr1 = &dog;
Animal* AnimlaPtr2 = &cat;
Cat& catRef1 = dynamic_cast<Cat&>(AnimalRef1); // Throws an exception AnimalRef1 is a dog
Cat* catPtr1 = dynamic_cast<Cat*>(AnimalPtr1); // Returns NULL AnimalPtr1 is a dog
Cat& catRef2 = dynamic_cast<Cat&>(AnimalRef2); // Works
Cat* catPtr2 = dynamic_cast<Cat*>(AnimalPtr2); // Works
// This on the other hand makes no sense
// An animal object is not a cat. Therefore it can not be treated like a Cat.
Animal a;
Cat& catRef1 = dynamic_cast<Cat&>(a); // Throws an exception Its not a CAT
Cat* catPtr1 = dynamic_cast<Cat*>(&a); // Returns NULL Its not a CAT.
Now looking back at your first statement:
Animal animal = cat; // This works. But it slices the cat part out and just
// assigns the animal part of the object.
Cat bigCat = animal; // Makes no sense.
// An animal is not a cat!!!!!
Dog bigDog = bigCat; // A cat is not a dog !!!!
You should very rarely ever need to use dynamic cast.
This is why we have virtual methods:
void makeNoise(Animal& animal)
{
animal.DoNoiseMake();
}
Dog dog;
Cat cat;
Duck duck;
Chicken chicken;
makeNoise(dog);
makeNoise(cat);
makeNoise(duck);
makeNoise(chicken);
The only reason I can think of is if you stored your object in a base class container:
std::vector<Animal*> barnYard;
barnYard.push_back(&dog);
barnYard.push_back(&cat);
barnYard.push_back(&duck);
barnYard.push_back(&chicken);
Dog* dog = dynamic_cast<Dog*>(barnYard[1]); // Note: NULL as this was the cat.
But if you need to cast particular objects back to Dogs then there is a fundamental problem in your design. You should be accessing properties via the virtual methods.
barnYard[1]->DoNoiseMake();
Try with setPreferredSize
instead of setSize
.
UPDATE: GridLayout
take up all space in its container, and BoxLayout
seams to take up all the width in its container, so I added some glue-panels that are invisible and just take up space when the user stretches the window. I have just done this horizontally, and not vertically, but you could implement that in the same way if you want it.
Since GridLayout
make all cells in the same size, it doesn't matter if they have a specified size. You have to specify a size for its container instead, as I have done.
import javax.swing.*;
import java.awt.*;
public class PanelModel {
public static void main(String[] args) {
JFrame frame = new JFrame("Colored Trails");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel mainPanel = new JPanel();
mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS));
JPanel firstPanel = new JPanel(new GridLayout(4, 4));
firstPanel.setPreferredSize(new Dimension(4*100, 4*100));
for (int i=1; i<=4; i++) {
for (int j=1; j<=4; j++) {
firstPanel.add(new JButton());
}
}
JPanel firstGluePanel = new JPanel(new BorderLayout());
firstGluePanel.add(firstPanel, BorderLayout.WEST);
firstGluePanel.add(Box.createHorizontalGlue(), BorderLayout.CENTER);
firstGluePanel.add(Box.createVerticalGlue(), BorderLayout.SOUTH);
JPanel secondPanel = new JPanel(new GridLayout(13, 5));
secondPanel.setPreferredSize(new Dimension(5*40, 13*40));
for (int i=1; i<=5; i++) {
for (int j=1; j<=13; j++) {
secondPanel.add(new JButton());
}
}
JPanel secondGluePanel = new JPanel(new BorderLayout());
secondGluePanel.add(secondPanel, BorderLayout.WEST);
secondGluePanel.add(Box.createHorizontalGlue(), BorderLayout.CENTER);
secondGluePanel.add(Box.createVerticalGlue(), BorderLayout.SOUTH);
mainPanel.add(firstGluePanel);
mainPanel.add(secondGluePanel);
frame.getContentPane().add(mainPanel);
//frame.setSize(400,600);
frame.pack();
frame.setVisible(true);
}
}
A free windows app that does that
http://www.addictivetips.com/windows-tips/csv-splitter-for-windows/
In summary:
The ApplicationContext includes all functionality of the BeanFactory. It is generally recommended to use the former.
There are some limited situations such as in a Mobile application, where memory consumption might be critical.
In that scenarios, It can be justifiable to use the more lightweight BeanFactory. However, in the most enterprise applications, the ApplicationContext is what you will want to use.
For more, see my blog post:
The following should suffice:
[^ ]
If you want to expand that to anything but white-space (line breaks, tabs, spaces, hard spaces):
[^\s]
or
\S # Note this is a CAPITAL 'S'!
When user click on the logout button then write the following code:
Intent intent = new Intent(this, LoginActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
And also when after login if you call new activity do not use finish();
You can do an http DELETE via a URL like /users/1/roles/2. That would be the most RESTful way to do it.
Otherwise I guess you can just pass the user id as part of the query params? Something like
$http.delete('/roles/' + roleid, {params: {userId: userID}}).then...
no gQuery
document.getElementById('your_box').onclick();
I used certain class on my checkboxes.
var x = document.getElementsByClassName("box_class");
var i;
for (i = 0; i < x.length; i++) {
if(x[i].checked) x[i].checked = false;
else x[i].checked = true;
x[i].onclick();
}
Know this is kind of old, but see many questions like this...
We use Chrome a lot in the classroom and it is a must to working with local files.
What we have been using is "Web Server for Chrome". You start it up, choose the folder wishing to work with and go to URL (like 127.0.0.1:port you chose)
It is a simple server and cannot use PHP but for simple work, might be your solution:
https://chrome.google.com/webstore/detail/web-server-for-chrome/ofhbbkphhbklhfoeikjpcbhemlocgigb
The problem was solved by reinstalling Visual Studio 2015.
You can make use of the defaultSelected
property of an option element:
Contains the initial value of the
selected
HTML attribute, indicating whether the option is selected by default or not.
So, the DOM interface already keeps track which option was selected initially.
$("#reset").on("click", function () {
$('#my_select option').prop('selected', function() {
return this.defaultSelected;
});
});
This would even work for multi-select elements.
If you don't want to iterate over all options, but "break" after you found the originally selected one, you can use .each
instead:
$('#my_select option').each(function () {
if (this.defaultSelected) {
this.selected = true;
return false;
}
});
Without jQuery:
var options = document.querySelectorAll('#my_select option');
for (var i = 0, l = options.length; i < l; i++) {
options[i].selected = options[i].defaultSelected;
}
For the record, this is documented in How do I add resources to my JAR? (illustrated for unit tests but the same applies for a "regular" resource):
To add resources to the classpath for your unit tests, you follow the same pattern as you do for adding resources to the JAR except the directory you place resources in is
${basedir}/src/test/resources
. At this point you would have a project directory structure that would look like the following:my-app |-- pom.xml `-- src |-- main | |-- java | | `-- com | | `-- mycompany | | `-- app | | `-- App.java | `-- resources | `-- META-INF | |-- application.properties `-- test |-- java | `-- com | `-- mycompany | `-- app | `-- AppTest.java `-- resources `-- test.properties
In a unit test you could use a simple snippet of code like the following to access the resource required for testing:
... // Retrieve resource InputStream is = getClass().getResourceAsStream("/test.properties" ); // Do something with the resource ...
You have multiple options:
background-size: 100% 100%;
- image gets stretched (aspect ratio may be preserved, depending on browser)background-size: contain;
- image is stretched without cutting it while preserving aspect ratiobackground-size: cover;
- image is completely covering the element while preserving aspect ratio (image can be cut off)/edit: And now, there is even more: https://alligator.io/css/cropping-images-object-fit
Here are screenshots for some browsers to show their differences.
background-size: 100% 100%;
produces the least predictable result.You can create a StreamReader
around the stream, then call StreamReader.ReadToEnd()
.
StreamReader responseReader = new StreamReader(request.GetResponse().GetResponseStream());
var responseData = responseReader.ReadToEnd();
You can use math.ceil()
to round up, and then multiply by 10
import math
def roundup(x):
return int(math.ceil(x / 10.0)) * 10
To use just do
>>roundup(45)
50
To create a virtual environment for your project, open a new command prompt, navigate to the folder where you want to create your project and then enter the following:
py -m venv project-name This will create a folder called ‘project-name’ if it does not already exist and setup the virtual environment. To activate the environment, run: project-name\Scripts\activate.bat**
The virtual environment will be activated and you’ll see “(project-name)” next to the command prompt to designate that. Each time you start a new command prompt, you’ll need to activate the environment again.
Install Django
Django can be installed easily using pip within your virtual environment.
In the command prompt, ensure your virtual environment is active, and execute the following command:
py -m pip install Django
window.isset = function(v_var) {
if(typeof(v_var) == 'number'){ if(isNaN(v_var)){ return false; }}
if(typeof(v_var) == 'undefined' || v_var === null){ return false; } else { return true; }
};
plus Tests:
https://gist.github.com/daylik/24acc318b6abdcdd63b46607513ae073
Use http://localhost/sqlbuddy --> users
interface.
You can find it at the localhost main page at Your Aliases
section.
I just finished a project that uses AD and Java. We used Spring ldapTemplate.
AD is LDAP compliant (almost), I don't think you will have any issues with the task you have. I mean the fact that it is AD or any other LDAP server it doesn't matter if you want just to connect.
I would take a look at: Spring LDAP
They have examples too.
As for encryption, we used SSL connection (so it was LDAPS). AD had to be configured on a SSL port/protocol.
But first of all, make sure you can properly connect to your AD via an LDAP IDE. I use Apache Directory Studio, it is really cool, and it is written in Java. That is all I needed. For testing purposes you could also install Apache Directory Server
There's not a way as of 11/2012, HOWEVER
Highlight Text (In visual Studio.net)
ctrl + k + c, ctrl + k + u
Will comment / uncomment, respectively
You have a class on your CSS that is overwriting your width and height, the class reads as such:
.postItem img {
height: auto;
width: 450px;
}
Remove that and your width/height properties on the img
tag should work.
From SQL database get enum like:
SqlDataReader dr = selectCmd.ExecuteReader();
while (dr.Read()) {
EnumType et = (EnumType)Enum.Parse(typeof(EnumType), dr.GetString(0));
....
}
In objectMapper we have writeValueAsString() which accepts object as parameter. We can pass object list as parameter get the string back.
List<Apartment> aptList = new ArrayList<Apartment>();
Apartment aptmt = null;
for(int i=0;i<5;i++){
aptmt= new Apartment();
aptmt.setAptName("Apartment Name : ArrowHead Ranch");
aptmt.setAptNum("3153"+i);
aptmt.setPhase((i+1));
aptmt.setFloorLevel(i+2);
aptList.add(aptmt);
}
mapper.writeValueAsString(aptList)
Run cmd
and then run node server.js
. In your example, you are trying to use the REPL to run your command, which is not going to work. The ellipsis is node.js expecting more tokens before closing the current scope (you can type code in and run it on the fly here)
Just a little addition to the answer of @dAm2k :
In addition to sudo apt-get remove --purge mysql\*
I've done a sudo apt-get remove --purge mariadb\*
.
I seems that in the new release of debian (stretch), when you install mysql it install mariadb package with it.
Hope it helps.
Only static functions are called with class name.
classname::Staicfunction();
Non static functions have to be called using objects.
classname obj;
obj.Somefunction();
This is exactly what your error means. Since your function is non static you have to use a object reference to invoke it.
This one also works
Remove the "php.executablePath" line from the VS code settings.
Then add the xampp php path to the System variables
After that restart the Visual Studio Code
NOTE: this topic is about installation issues with MS project templates.
I came here via a search in Google, I was looking for a missing Template option in Visual Studio 2017 File menu: in VS-2015, it was Export to Template and I used it to add my own standard Project Items.
Meanwhile, I found an answer.. my issue was not related to default templates and it does not need install things. The option Export to Template has been moved to the VS-2017 Project menu !
To me the best way is -
Hope this will help .
Now You can access the InputField's state which is the child of FormEditor .
Basically whenever there is a change in the state of the input field(child) we are getting the value from the event object and then passing this value to the Parent where in the state in the Parent is set.
On button click we are just printing the state of the Input fields.
The key point here is that we are using the props to get the Input Field's id/value and also to call the functions which are set as attributes on the Input Field while we generate the reusable child Input fields.
class InputField extends React.Component{
handleChange = (event)=> {
const val = event.target.value;
this.props.onChange(this.props.id , val);
}
render() {
return(
<div>
<input type="text" onChange={this.handleChange} value={this.props.value}/>
<br/><br/>
</div>
);
}
}
class FormEditorParent extends React.Component {
state = {};
handleFieldChange = (inputFieldId , inputFieldValue) => {
this.setState({[inputFieldId]:inputFieldValue});
}
//on Button click simply get the state of the input field
handleClick = ()=>{
console.log(JSON.stringify(this.state));
}
render() {
const fields = this.props.fields.map(field => (
<InputField
key={field}
id={field}
onChange={this.handleFieldChange}
value={this.state[field]}
/>
));
return (
<div>
<div>
<button onClick={this.handleClick}>Click Me</button>
</div>
<div>
{fields}
</div>
</div>
);
}
}
const App = () => {
const fields = ["field1", "field2", "anotherField"];
return <FormEditorParent fields={fields} />;
};
ReactDOM.render(<App/>, mountNode);
This library helped me, I had a dict list of nested keys with the same name but with different values, every other solution kept overriding those nested keys.
https://pypi.org/project/deepmerge/
from deepmerge import always_merger
def process_parms(args):
temp_list = []
for x in args:
with open(x, 'r') as stream:
temp_list.append(yaml.safe_load(stream))
return always_merger.merge(*temp_list)
If you want a uniformly distributed pseudorandom long in the range of [0,m
), try using the modulo operator and the absolute value method combined with the nextLong()
method as seen below:
Math.abs(rand.nextLong()) % m;
Where rand
is your Random object.
The modulo operator divides two numbers and outputs the remainder of those numbers. For example, 3 % 2
is 1
because the remainder of 3 and 2 is 1.
Since nextLong()
generates a uniformly distributed pseudorandom long in the range of [-(2^48),2^48) (or somewhere in that range), you will need to take the absolute value of it. If you don't, the modulo of the nextLong()
method has a 50% chance of returning a negative value, which is out of the range [0,m
).
What you initially requested was a uniformly distributed pseudorandom long in the range of [0,100). The following code does so:
Math.abs(rand.nextLong()) % 100;
ok, so if you are using bootstrap-rtl.css, what you can do is go to the following class .modal-backdrop and remove the z-index attribute. after that all should be fine
You must use the equals operator not the assignment like
if(document.form1.radio1[0].checked == true) {
alert("You have selected Option 1");
}
IsEmpty returns True if the variable is uninitialized, or is explicitly set to Empty; otherwise, it returns False. False is always returned if expression contains more than one variable. IsEmpty only returns meaningful information for variants. (https://msdn.microsoft.com/en-us/library/office/gg264227.aspx) . So you must check every cell in range separately:
Dim thisColumn as Byte, thisRow as Byte
For thisColumn = 1 To 5
For ThisRow = 1 To 6
If IsEmpty(Cells(thisRow, thisColumn)) = False Then
GoTo RangeIsNotEmpty
End If
Next thisRow
Next thisColumn
...........
RangeIsNotEmpty:
Of course here are more code than in solution with CountA function which count not empty cells, but GoTo can interupt loops if at least one not empty cell is found and do your code faster especially if range is large and you need to detect this case. Also this code for me is easier to understand what it is doing, than with Excel CountA function which is not VBA function.
Check out my post on this subject.
So, if you have a model with an imagefield with an upload_to attribute set, such as:
class Avatar(models.Model):
image_file = models.ImageField(upload_to=user_directory_path_avatar)
then it is reasonably easy to change the image, at least in django 3.15.
In the view, when you process the image, you can obtain the image from:
self.request.FILES['avatar']
which is an instance of type InMemoryUploadedFile, as long as your html form has the enctype set and a field for avatar...
<form method="post" class="avatarform" id="avatarform" action="{% url avatar_update_view' %}" enctype="multipart/form-data">
{% csrf_token %}
<input id="avatarUpload" class="d-none" type="file" name="avatar">
</form>
Then, setting the new image in the view is as easy as the following (where profile is the profile model for the self.request.user)
profile.avatar.image_file.save(self.request.FILES['avatar'].name, self.request.FILES['avatar'])
There is no need to save the profile.avatar, the image_field already saves, and into the correct location because of the 'upload_to' callback function.
Given:
uint n = 3;
int i = checked((int)n); //throws OverflowException if n > Int32.MaxValue
int i = unchecked((int)n); //converts the bits only
//i will be negative if n > Int32.MaxValue
int i = (int)n; //same behavior as unchecked
or
int i = Convert.ToInt32(n); //same behavior as checked
--EDIT
Included info as mentioned by Kenan E. K.
Minimal runnable example
main.cpp
#include <cassert>
class C {
public:
int i;
C(int i) : i(i) {}
int m(int j) { return this->i + j; }
};
int main() {
// Get a method pointer.
int (C::*p)(int) = &C::m;
// Create a test object.
C c(1);
C *cp = &c;
// Operator .*
assert((c.*p)(2) == 3);
// Operator ->*
assert((cp->*p)(2) == 3);
}
Compile and run:
g++ -ggdb3 -O0 -std=c++11 -Wall -Wextra -pedantic -o main.out main.cpp
./main.out
Tested in Ubuntu 18.04.
You cannot change the order of the parenthesis or omit them. The following do not work:
c.*p(2)
c.*(p)(2)
GCC 9.2 would fail with:
main.cpp: In function ‘int main()’:
main.cpp:19:18: error: must use ‘.*’ or ‘->*’ to call pointer-to-member function in ‘p (...)’, e.g. ‘(... ->* p) (...)’
19 | assert(c.*p(2) == 3);
|
C++11 standard
.*
and ->*
are a single operators introduced in C++ for this purpose, and not present in C.
.*
and ->*
.You should check that what you are passing to foreach
is an array by using the is_array function
If you are not sure it's going to be an array you can always check using the following PHP example code:
if (is_array($variable)) {
foreach ($variable as $item) {
//do something
}
}
This trick was mentioned under a few other questions, but not here yet.
All major compilers support __PRETTY_FUNC__
(GCC & Clang) /__FUNCSIG__
(MSVC) as an extension.
When used in a template like this:
template <typename T> const char *foo()
{
#ifdef _MSC_VER
return __FUNCSIG__;
#else
return __PRETTY_FUNCTION__;
#endif
}
It produces strings in a compiler-dependent format, that contain, among other things, the name of T
.
E.g. foo<float>()
returns:
"const char* foo() [with T = float]"
on GCC"const char *foo() [T = float]"
on Clang"const char *__cdecl foo<float>(void)"
on MSVCYou can easily parse the type names out of those strings. You just need to figure out how many 'junk' characters your compiler inserts before and after the type.
You can even do that completely at compile-time.
The resulting names can slightly vary between different compilers. E.g. GCC omits default template arguments, and MSVC prefixes classes with the word class
.
Here's an implementation that I've been using. Everything is done at compile-time.
Example usage:
std::cout << TypeName<float>() << '\n';
std::cout << TypeName(1.2f); << '\n';
Implementation:
#include <array>
#include <cstddef>
namespace impl
{
template <typename T>
constexpr const auto &RawTypeName()
{
#ifdef _MSC_VER
return __FUNCSIG__;
#else
return __PRETTY_FUNCTION__;
#endif
}
struct RawTypeNameFormat
{
std::size_t leading_junk = 0, trailing_junk = 0;
};
// Returns `false` on failure.
inline constexpr bool GetRawTypeNameFormat(RawTypeNameFormat *format)
{
const auto &str = RawTypeName<int>();
for (std::size_t i = 0;; i++)
{
if (str[i] == 'i' && str[i+1] == 'n' && str[i+2] == 't')
{
if (format)
{
format->leading_junk = i;
format->trailing_junk = sizeof(str)-i-3-1; // `3` is the length of "int", `1` is the space for the null terminator.
}
return true;
}
}
return false;
}
inline static constexpr RawTypeNameFormat format =
[]{
static_assert(GetRawTypeNameFormat(nullptr), "Unable to figure out how to generate type names on this compiler.");
RawTypeNameFormat format;
GetRawTypeNameFormat(&format);
return format;
}();
}
// Returns the type name in a `std::array<char, N>` (null-terminated).
template <typename T>
[[nodiscard]] constexpr auto CexprTypeName()
{
constexpr std::size_t len = sizeof(impl::RawTypeName<T>()) - impl::format.leading_junk - impl::format.trailing_junk;
std::array<char, len> name{};
for (std::size_t i = 0; i < len-1; i++)
name[i] = impl::RawTypeName<T>()[i + impl::format.leading_junk];
return name;
}
template <typename T>
[[nodiscard]] const char *TypeName()
{
static constexpr auto name = CexprTypeName<T>();
return name.data();
}
template <typename T>
[[nodiscard]] const char *TypeName(const T &)
{
return TypeName<T>();
}
In above code, you don't pass the kml data to your mapView anywhere in your code, as far as I can see. To display the route, you should parse the kml data i.e. via SAX parser, then display the route markers on the map.
See the code below for an example, but it's not complete though - just for you as a reference and get some idea.
This is a simple bean I use to hold the route information I will be parsing.
package com.myapp.android.model.navigation;
import java.util.ArrayList;
import java.util.Iterator;
public class NavigationDataSet {
private ArrayList<Placemark> placemarks = new ArrayList<Placemark>();
private Placemark currentPlacemark;
private Placemark routePlacemark;
public String toString() {
String s= "";
for (Iterator<Placemark> iter=placemarks.iterator();iter.hasNext();) {
Placemark p = (Placemark)iter.next();
s += p.getTitle() + "\n" + p.getDescription() + "\n\n";
}
return s;
}
public void addCurrentPlacemark() {
placemarks.add(currentPlacemark);
}
public ArrayList<Placemark> getPlacemarks() {
return placemarks;
}
public void setPlacemarks(ArrayList<Placemark> placemarks) {
this.placemarks = placemarks;
}
public Placemark getCurrentPlacemark() {
return currentPlacemark;
}
public void setCurrentPlacemark(Placemark currentPlacemark) {
this.currentPlacemark = currentPlacemark;
}
public Placemark getRoutePlacemark() {
return routePlacemark;
}
public void setRoutePlacemark(Placemark routePlacemark) {
this.routePlacemark = routePlacemark;
}
}
And the SAX Handler to parse the kml:
package com.myapp.android.model.navigation;
import android.util.Log;
import com.myapp.android.myapp;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
import com.myapp.android.model.navigation.NavigationDataSet;
import com.myapp.android.model.navigation.Placemark;
public class NavigationSaxHandler extends DefaultHandler{
// ===========================================================
// Fields
// ===========================================================
private boolean in_kmltag = false;
private boolean in_placemarktag = false;
private boolean in_nametag = false;
private boolean in_descriptiontag = false;
private boolean in_geometrycollectiontag = false;
private boolean in_linestringtag = false;
private boolean in_pointtag = false;
private boolean in_coordinatestag = false;
private StringBuffer buffer;
private NavigationDataSet navigationDataSet = new NavigationDataSet();
// ===========================================================
// Getter & Setter
// ===========================================================
public NavigationDataSet getParsedData() {
navigationDataSet.getCurrentPlacemark().setCoordinates(buffer.toString().trim());
return this.navigationDataSet;
}
// ===========================================================
// Methods
// ===========================================================
@Override
public void startDocument() throws SAXException {
this.navigationDataSet = new NavigationDataSet();
}
@Override
public void endDocument() throws SAXException {
// Nothing to do
}
/** Gets be called on opening tags like:
* <tag>
* Can provide attribute(s), when xml was like:
* <tag attribute="attributeValue">*/
@Override
public void startElement(String namespaceURI, String localName,
String qName, Attributes atts) throws SAXException {
if (localName.equals("kml")) {
this.in_kmltag = true;
} else if (localName.equals("Placemark")) {
this.in_placemarktag = true;
navigationDataSet.setCurrentPlacemark(new Placemark());
} else if (localName.equals("name")) {
this.in_nametag = true;
} else if (localName.equals("description")) {
this.in_descriptiontag = true;
} else if (localName.equals("GeometryCollection")) {
this.in_geometrycollectiontag = true;
} else if (localName.equals("LineString")) {
this.in_linestringtag = true;
} else if (localName.equals("point")) {
this.in_pointtag = true;
} else if (localName.equals("coordinates")) {
buffer = new StringBuffer();
this.in_coordinatestag = true;
}
}
/** Gets be called on closing tags like:
* </tag> */
@Override
public void endElement(String namespaceURI, String localName, String qName)
throws SAXException {
if (localName.equals("kml")) {
this.in_kmltag = false;
} else if (localName.equals("Placemark")) {
this.in_placemarktag = false;
if ("Route".equals(navigationDataSet.getCurrentPlacemark().getTitle()))
navigationDataSet.setRoutePlacemark(navigationDataSet.getCurrentPlacemark());
else navigationDataSet.addCurrentPlacemark();
} else if (localName.equals("name")) {
this.in_nametag = false;
} else if (localName.equals("description")) {
this.in_descriptiontag = false;
} else if (localName.equals("GeometryCollection")) {
this.in_geometrycollectiontag = false;
} else if (localName.equals("LineString")) {
this.in_linestringtag = false;
} else if (localName.equals("point")) {
this.in_pointtag = false;
} else if (localName.equals("coordinates")) {
this.in_coordinatestag = false;
}
}
/** Gets be called on the following structure:
* <tag>characters</tag> */
@Override
public void characters(char ch[], int start, int length) {
if(this.in_nametag){
if (navigationDataSet.getCurrentPlacemark()==null) navigationDataSet.setCurrentPlacemark(new Placemark());
navigationDataSet.getCurrentPlacemark().setTitle(new String(ch, start, length));
} else
if(this.in_descriptiontag){
if (navigationDataSet.getCurrentPlacemark()==null) navigationDataSet.setCurrentPlacemark(new Placemark());
navigationDataSet.getCurrentPlacemark().setDescription(new String(ch, start, length));
} else
if(this.in_coordinatestag){
if (navigationDataSet.getCurrentPlacemark()==null) navigationDataSet.setCurrentPlacemark(new Placemark());
//navigationDataSet.getCurrentPlacemark().setCoordinates(new String(ch, start, length));
buffer.append(ch, start, length);
}
}
}
and a simple placeMark bean:
package com.myapp.android.model.navigation;
public class Placemark {
String title;
String description;
String coordinates;
String address;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getCoordinates() {
return coordinates;
}
public void setCoordinates(String coordinates) {
this.coordinates = coordinates;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
Finally the service class in my model that calls the calculation:
package com.myapp.android.model.navigation;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import com.myapp.android.myapp;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
import android.util.Log;
public class MapService {
public static final int MODE_ANY = 0;
public static final int MODE_CAR = 1;
public static final int MODE_WALKING = 2;
public static String inputStreamToString (InputStream in) throws IOException {
StringBuffer out = new StringBuffer();
byte[] b = new byte[4096];
for (int n; (n = in.read(b)) != -1;) {
out.append(new String(b, 0, n));
}
return out.toString();
}
public static NavigationDataSet calculateRoute(Double startLat, Double startLng, Double targetLat, Double targetLng, int mode) {
return calculateRoute(startLat + "," + startLng, targetLat + "," + targetLng, mode);
}
public static NavigationDataSet calculateRoute(String startCoords, String targetCoords, int mode) {
String urlPedestrianMode = "http://maps.google.com/maps?" + "saddr=" + startCoords + "&daddr="
+ targetCoords + "&sll=" + startCoords + "&dirflg=w&hl=en&ie=UTF8&z=14&output=kml";
Log.d(myapp.APP, "urlPedestrianMode: "+urlPedestrianMode);
String urlCarMode = "http://maps.google.com/maps?" + "saddr=" + startCoords + "&daddr="
+ targetCoords + "&sll=" + startCoords + "&hl=en&ie=UTF8&z=14&output=kml";
Log.d(myapp.APP, "urlCarMode: "+urlCarMode);
NavigationDataSet navSet = null;
// for mode_any: try pedestrian route calculation first, if it fails, fall back to car route
if (mode==MODE_ANY||mode==MODE_WALKING) navSet = MapService.getNavigationDataSet(urlPedestrianMode);
if (mode==MODE_ANY&&navSet==null||mode==MODE_CAR) navSet = MapService.getNavigationDataSet(urlCarMode);
return navSet;
}
/**
* Retrieve navigation data set from either remote URL or String
* @param url
* @return navigation set
*/
public static NavigationDataSet getNavigationDataSet(String url) {
// urlString = "http://192.168.1.100:80/test.kml";
Log.d(myapp.APP,"urlString -->> " + url);
NavigationDataSet navigationDataSet = null;
try
{
final URL aUrl = new URL(url);
final URLConnection conn = aUrl.openConnection();
conn.setReadTimeout(15 * 1000); // timeout for reading the google maps data: 15 secs
conn.connect();
/* Get a SAXParser from the SAXPArserFactory. */
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.newSAXParser();
/* Get the XMLReader of the SAXParser we created. */
XMLReader xr = sp.getXMLReader();
/* Create a new ContentHandler and apply it to the XML-Reader*/
NavigationSaxHandler navSax2Handler = new NavigationSaxHandler();
xr.setContentHandler(navSax2Handler);
/* Parse the xml-data from our URL. */
xr.parse(new InputSource(aUrl.openStream()));
/* Our NavigationSaxHandler now provides the parsed data to us. */
navigationDataSet = navSax2Handler.getParsedData();
/* Set the result to be displayed in our GUI. */
Log.d(myapp.APP,"navigationDataSet: "+navigationDataSet.toString());
} catch (Exception e) {
// Log.e(myapp.APP, "error with kml xml", e);
navigationDataSet = null;
}
return navigationDataSet;
}
}
Drawing:
/**
* Does the actual drawing of the route, based on the geo points provided in the nav set
*
* @param navSet Navigation set bean that holds the route information, incl. geo pos
* @param color Color in which to draw the lines
* @param mMapView01 Map view to draw onto
*/
public void drawPath(NavigationDataSet navSet, int color, MapView mMapView01) {
Log.d(myapp.APP, "map color before: " + color);
// color correction for dining, make it darker
if (color == Color.parseColor("#add331")) color = Color.parseColor("#6C8715");
Log.d(myapp.APP, "map color after: " + color);
Collection overlaysToAddAgain = new ArrayList();
for (Iterator iter = mMapView01.getOverlays().iterator(); iter.hasNext();) {
Object o = iter.next();
Log.d(myapp.APP, "overlay type: " + o.getClass().getName());
if (!RouteOverlay.class.getName().equals(o.getClass().getName())) {
// mMapView01.getOverlays().remove(o);
overlaysToAddAgain.add(o);
}
}
mMapView01.getOverlays().clear();
mMapView01.getOverlays().addAll(overlaysToAddAgain);
String path = navSet.getRoutePlacemark().getCoordinates();
Log.d(myapp.APP, "path=" + path);
if (path != null && path.trim().length() > 0) {
String[] pairs = path.trim().split(" ");
Log.d(myapp.APP, "pairs.length=" + pairs.length);
String[] lngLat = pairs[0].split(","); // lngLat[0]=longitude lngLat[1]=latitude lngLat[2]=height
Log.d(myapp.APP, "lnglat =" + lngLat + ", length: " + lngLat.length);
if (lngLat.length<3) lngLat = pairs[1].split(","); // if first pair is not transferred completely, take seconds pair //TODO
try {
GeoPoint startGP = new GeoPoint((int) (Double.parseDouble(lngLat[1]) * 1E6), (int) (Double.parseDouble(lngLat[0]) * 1E6));
mMapView01.getOverlays().add(new RouteOverlay(startGP, startGP, 1));
GeoPoint gp1;
GeoPoint gp2 = startGP;
for (int i = 1; i < pairs.length; i++) // the last one would be crash
{
lngLat = pairs[i].split(",");
gp1 = gp2;
if (lngLat.length >= 2 && gp1.getLatitudeE6() > 0 && gp1.getLongitudeE6() > 0
&& gp2.getLatitudeE6() > 0 && gp2.getLongitudeE6() > 0) {
// for GeoPoint, first:latitude, second:longitude
gp2 = new GeoPoint((int) (Double.parseDouble(lngLat[1]) * 1E6), (int) (Double.parseDouble(lngLat[0]) * 1E6));
if (gp2.getLatitudeE6() != 22200000) {
mMapView01.getOverlays().add(new RouteOverlay(gp1, gp2, 2, color));
Log.d(myapp.APP, "draw:" + gp1.getLatitudeE6() + "/" + gp1.getLongitudeE6() + " TO " + gp2.getLatitudeE6() + "/" + gp2.getLongitudeE6());
}
}
// Log.d(myapp.APP,"pair:" + pairs[i]);
}
//routeOverlays.add(new RouteOverlay(gp2,gp2, 3));
mMapView01.getOverlays().add(new RouteOverlay(gp2, gp2, 3));
} catch (NumberFormatException e) {
Log.e(myapp.APP, "Cannot draw route.", e);
}
}
// mMapView01.getOverlays().addAll(routeOverlays); // use the default color
mMapView01.setEnabled(true);
}
This is the RouteOverlay class:
package com.myapp.android.activity.map.nav;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.RectF;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import com.google.android.maps.Projection;
public class RouteOverlay extends Overlay {
private GeoPoint gp1;
private GeoPoint gp2;
private int mRadius=6;
private int mode=0;
private int defaultColor;
private String text="";
private Bitmap img = null;
public RouteOverlay(GeoPoint gp1,GeoPoint gp2,int mode) { // GeoPoint is a int. (6E)
this.gp1 = gp1;
this.gp2 = gp2;
this.mode = mode;
defaultColor = 999; // no defaultColor
}
public RouteOverlay(GeoPoint gp1,GeoPoint gp2,int mode, int defaultColor) {
this.gp1 = gp1;
this.gp2 = gp2;
this.mode = mode;
this.defaultColor = defaultColor;
}
public void setText(String t) {
this.text = t;
}
public void setBitmap(Bitmap bitmap) {
this.img = bitmap;
}
public int getMode() {
return mode;
}
@Override
public boolean draw (Canvas canvas, MapView mapView, boolean shadow, long when) {
Projection projection = mapView.getProjection();
if (shadow == false) {
Paint paint = new Paint();
paint.setAntiAlias(true);
Point point = new Point();
projection.toPixels(gp1, point);
// mode=1:start
if(mode==1) {
if(defaultColor==999)
paint.setColor(Color.BLACK); // Color.BLUE
else
paint.setColor(defaultColor);
RectF oval=new RectF(point.x - mRadius, point.y - mRadius,
point.x + mRadius, point.y + mRadius);
// start point
canvas.drawOval(oval, paint);
}
// mode=2:path
else if(mode==2) {
if(defaultColor==999)
paint.setColor(Color.RED);
else
paint.setColor(defaultColor);
Point point2 = new Point();
projection.toPixels(gp2, point2);
paint.setStrokeWidth(5);
paint.setAlpha(defaultColor==Color.parseColor("#6C8715")?220:120);
canvas.drawLine(point.x, point.y, point2.x,point2.y, paint);
}
/* mode=3:end */
else if(mode==3) {
/* the last path */
if(defaultColor==999)
paint.setColor(Color.BLACK); // Color.GREEN
else
paint.setColor(defaultColor);
Point point2 = new Point();
projection.toPixels(gp2, point2);
paint.setStrokeWidth(5);
paint.setAlpha(defaultColor==Color.parseColor("#6C8715")?220:120);
canvas.drawLine(point.x, point.y, point2.x,point2.y, paint);
RectF oval=new RectF(point2.x - mRadius,point2.y - mRadius,
point2.x + mRadius,point2.y + mRadius);
/* end point */
paint.setAlpha(255);
canvas.drawOval(oval, paint);
}
}
return super.draw(canvas, mapView, shadow, when);
}
}
I like owlstead's original answer, and if you don't like the idea of creating a ByteBuffer
on every method call then you can reuse the ByteBuffer
by calling it's .clear()
and .flip()
methods:
ByteBuffer _intShifter = ByteBuffer.allocate(Integer.SIZE / Byte.SIZE)
.order(ByteOrder.LITTLE_ENDIAN);
public byte[] intToByte(int value) {
_intShifter.clear();
_intShifter.putInt(value);
return _intShifter.array();
}
public int byteToInt(byte[] data)
{
_intShifter.clear();
_intShifter.put(data, 0, Integer.SIZE / Byte.SIZE);
_intShifter.flip();
return _intShifter.getInt();
}
In phpMyAdmin 4.0, you go to Status > Monitor. In there you can enable the slow query log and general log, see a live monitor, select a portion of the graph, see the related queries and analyse them.
you can try the solution, compatible with all browser.
Following is orientationchange
compatibility pic:
therefore, I author a orientaionchange
polyfill, it is a based on @media attribute to fix orientationchange utility library——orientationchange-fix
window.addEventListener('orientationchange', function(){
if(window.neworientation.current === 'portrait|landscape'){
// do something……
} else {
// do something……
}
}, false);
For those looking for the Firebase Firestore equivalent. It's
firebase.firestore.FieldValue.serverTimestamp()
e.g.
firebase.firestore().collection("cities").add({
createdAt: firebase.firestore.FieldValue.serverTimestamp(),
name: "Tokyo",
country: "Japan"
})
.then(function(docRef) {
console.log("Document written with ID: ", docRef.id);
})
.catch(function(error) {
console.error("Error adding document: ", error);
});
Here's what I use at the top of all my batch files. I just copy/paste from my template folder.
@echo off
:: --HAS ENDING BACKSLASH
set batdir=%~dp0
:: --MISSING ENDING BACKSLASH
:: set batdir=%CD%
pushd "%batdir%"
Setting current batch file's path to %batdir% allows you to call it in subsequent stmts in current batch file, regardless of where this batch file changes to. Using PUSHD allows you to use POPD to quickly set this batch file's path to original %batdir%. Remember, if using %batdir%ExtraDir or %batdir%\ExtraDir (depending on which version used above, ending backslash or not) you will need to enclose the entire string in double quotes if path has spaces (i.e. "%batdir%ExtraDir"). You can always use PUSHD %~dp0. [https: // ss64.com/ nt/ syntax-args .html] has more on (%~) parameters.
Note that using (::) at beginning of a line makes it a comment line. More importantly, using :: allows you to include redirectors, pipes, special chars (i.e. < > | etc) in that comment.
:: ORIG STMT WAS: dir *.* | find /v "1917" > outfile.txt
Of course, Powershell does this and lots more.
Java 8 has introduced a new class, Optional<T>
, that can be used in such cases. To use it, you'd modify your code slightly as follows:
interface B<E>{ Optional<E> method(); }
class A implements B<Void>{
public Optional<Void> method(){
// do something
return Optional.empty();
}
}
This allows you to ensure that you always get a non-null return value from your method, even when there isn't anything to return. That's especially powerful when used in conjunction with tools that detect when null
can or can't be returned, e.g. the Eclipse @NonNull
and @Nullable
annotations.