I totally do not get it, why everyone is suggesting the genric type over the array particularly for this question.
What if my need is to index n
different arraylists.
With declaring List<List<Integer>>
I need to create n
ArrayList<Integer>
objects manually or put a for loop to create n
lists or some other way, in any way it will always be my duty to create n
lists.
Isn't it great if we declare it through casting as List<Integer>[] = (List<Integer>[]) new List<?>[somenumber]
. I see it as a good design where one do not have to create all the indexing object (arraylists) by himself
Can anyone enlighten me why this (arrayform) will be a bad design and what are its disadvantages?
Following code gives intended results.
string text="some interesting text\nsome text that should be in the same line\r\nsome
text should be in another line"
var results = text.Split(new[] {"\n","\r\n"}, StringSplitOptions.None);
You cannot do new T()
due to type erasure. The default constructor can only be
public Navigation() { this("", "", null); }
You can create other constructors to provide default values for trigger and description. You need an concrete object of T
.
I too had the same issue and I believe the code below is more simple and it is working for me,
public class MultiReadHttpServletRequest extends HttpServletRequestWrapper {
private String _body;
public MultiReadHttpServletRequest(HttpServletRequest request) throws IOException {
super(request);
_body = "";
BufferedReader bufferedReader = request.getReader();
String line;
while ((line = bufferedReader.readLine()) != null){
_body += line;
}
}
@Override
public ServletInputStream getInputStream() throws IOException {
final ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(_body.getBytes());
return new ServletInputStream() {
public int read() throws IOException {
return byteArrayInputStream.read();
}
};
}
@Override
public BufferedReader getReader() throws IOException {
return new BufferedReader(new InputStreamReader(this.getInputStream()));
}
}
in the filter java class,
HttpServletRequest properRequest = ((HttpServletRequest) req);
MultiReadHttpServletRequest wrappedRequest = new MultiReadHttpServletRequest(properRequest);
req = wrappedRequest;
inputJson = IOUtils.toString(req.getReader());
System.out.println("body"+inputJson);
Please let me know if you have any queries
I too had this issue, I would copy the whole piece of code and put in Notepad, before pasting in Notepad, make sure you save the file type as ALL files and save the doc as utf-8 format. then you can paste your code and run, It should work. ?????? obiviously means unreadable characters.
Update the security group of that instance. Your local IP must have updated. Every time it’s IP flips. You will have to go update the Security group.
From the explanation it says that IE8 is the standard version for you and making content="IE=edge"
will render the page in the highest mode. To make it compatible change it to content="IE=8"
.
IE8 mode supports many established standards, including the W3C Cascading Style Sheets Level 2.1 Specification and the W3C Selectors API; it also provides limited support for the W3C Cascading Style Sheets Level 3 Specification (Working Draft) and other emerging standards.
Edge mode tells Internet Explorer to display content in the highest mode available. With Internet Explorer 9, this is equivalent to IE9 mode. If a future release of Internet Explorer supported a higher compatibility mode, pages set to edge mode would appear in the highest mode supported by that version. Those same pages would still appear in IE9 mode when viewed with Internet Explorer 9.
Reference What does <meta http-equiv="X-UA-Compatible" content="IE=edge"> do?
The sample above worked like a charm. I just did a modification just in case I need to manage multiple values. I hope this helps!
app.service('sharedProperties', function () {
var hashtable = {};
return {
setValue: function (key, value) {
hashtable[key] = value;
},
getValue: function (key) {
return hashtable[key];
}
}
});
The solution for me was : (in a Huawei)
--shell flag can also be used for javascript files
mongo --shell /path/to/jsfile/test.js
I don’t know for sure but I’m reading a book right now and what I am getting is that a program need to handle its signal ( as when I press CTRL-C
). Now a program can use SIG_IGN
to ignore all signals or SIG_DFL
to restore the default action.
Now if you do $ command &
then this process running as background process simply ignores all signals that will occur. For foreground processes these signals are not ignored.
The INSERT INTO Statement
The INSERT INTO statement is used to insert a new row in a table.
SQL INSERT INTO Syntax
It is possible to write the INSERT INTO statement in two forms.
The first form doesn't specify the column names where the data will be inserted, only their values:
INSERT INTO table_name
VALUES (value1, value2, value3,...)
The second form specifies both the column names and the values to be inserted:
INSERT INTO table_name (column1, column2, column3,...)
VALUES (value1, value2, value3,...)
For me, the clue was the "org.codehaus.mojo:exec-maven-plugin:1.2.1:exec".
The only place this was referenced was in the "Run project" action under Project Properties=>Actions.
When I changed this action to match the HelloFXMLWithMaven sample project (available in Netbeans 11.1): "clean javafx:run" then executing the Run goal was able to proceed.
Note, I also had to update the pom file's javafx-maven-plugin to also match the sample project but with the mainClass changed for my project.
Nothing seemd to work for me, but this did the trick
$(parent.window.document).scroll(function() {
alert("bottom!");
});
important:
after any changes or new settings you must restart SQLSERVER
service. run services.msc
on Windows
For those using Cygwin 1.7.34 or higher Cygwin supports configuring how to fetch home directory, login shell, and gecos information in /etc/nsswitch.conf
. This is detailed in the Cygwin User Guide section:
If you've previously created an /etc/passwd
or /etc/group
file you'll want to remove those and configure Cygwin using the new Windows Security model to POSIX mappings.
[[ -f /etc/passwd ]] && mv /etc/passwd /etc/passwd.bak
[[ -f /etc/group ]] && mv /etc/group /etc/group.bak
The /etc/nsswitch.conf
file's db_home:
setting defines how Cygwin fetches the user's home directory. The default setting for db_home:
is
db_home: /home/%U
So by default, Cygwin just sets the home dir to /home/$USERNAME
. You can change that though to point at any other custom path you want. The supported wildcard characters are:
%u
The Cygwin username (that's lowercase u).%U
The Windows username (that's uppercase U).%D
Windows domain in NetBIOS style.%H
Windows home directory in POSIX style. Note that, for the db_home:
setting, this only makes sense right after the preceeding slash, as in db_home: /%H/cygwin
%_
Since space and TAB characters are used to separate the schemata, a space in the filename has to be given as %_
(that's an underscore).%%
A per-cent character.In place of a path, you can specify one of four named path schemata that are predefined.
windows
The user's home directory is set to the same directory which is used as Windows home directory, typically something along the lines of %USERPROFILE%
or C:\Users\$USERNAME
. Of course, the Windows directory is converted to POSIX-style by Cygwin.
cygwin
AD only: The user's home directory is set to the POSIX path given in the cygwinHome attribute from the cygwinUser auxiliary class. See also the section called “The cygwin schema”.
unix
AD only: The user's home directory is set to the POSIX path given in the unixHomeDirectory attribute from the posixAccount auxiliary class. See also the section called “The unix schema”.
desc
The user's home directory is set to the POSIX path given in the home="..." XML-alike setting in the user's description attribute in SAM or AD. See the section called “The desc schema” for a detailed description.
The following will make the user's home directory in Cygwin the same as is used for the Windows home directory.
db_home: windows
For those using Cygwin 1.7.33 or earlier, update to the latest version Cygwin and remove previously used /etc/passwd
and /etc/group
files, then see the steps above.
Else, follow these older steps below.
Firstly, set a Windows environment variable for HOME that points to your user profile:
HOME
%USERPROFILE%
Now we are going to update the Cygwin /etc/passwd
file with the Windows %HOME%
variable we just created. Shell logins and remote logins via ssh
will rely on /etc/passwd
to tell them the location of the user's $HOME
path.
At the Cygwin bash command prompt type the following:
cp /etc/passwd /etc/passwd.bak
mkpasswd -l -p $(cygpath -H) > /etc/passwd
mkpasswd -d -p $(cygpath -H) >> /etc/passwd
The -d
switch tells mkpasswd to include DOMAIN users, while -l
is to only output LOCAL machine users. This is important if you're using a PC at work where the user information is obtained from a Windows Domain Controller.
Now, you can also do the same for groups, though this is not necessary unless you will be using a computer that is part of a Windows Domain. Cygwin reads group information from the Windows account databases, but you can add an /etc/group
file if your machine is often disconnected from its Domain Controller.
At the Cygwin bash prompt type the following:
cp /etc/group /etc/group.bak
mkgroup -l > /etc/group
mkgroup -d >> /etc/group
Now, exit Cygwin and start it up again. You should find that your HOME path points to the same location as your Windows User Profile -- i.e. /cygdrive/c/Users/username
if (input == undefined) { ... }
works just fine. It is of course not a null
comparison, but I usually find that if I need to distinguish between undefined
and null
, I actually rather need to distinguish between undefined
and just any false value, so
else if (input) { ... }
does it.
If a program redefines undefined
it is really braindead anyway.
The only reason I can think of was for IE4 compatibility, it did not understand the undefined
keyword (which is not actually a keyword, unfortunately), but of course values could be undefined
, so you had to have this:
var undefined;
and the comparison above would work just fine.
In your second example, you probably need double parentheses to make lint happy?
I too struggled a lot with phonegap steps.
The correct documentation is at the following link. http://docs.phonegap.com/en/edge/guide_cli_index.md.html
There is no more cordova command, It is replaced with phonegap.
This solution produces a result list, that contains all differences from both input lists. You can compare your objects by any property, in my example it is ID. The only restriction is that the lists should be of the same type:
var DifferencesList = ListA.Where(x => !ListB.Any(x1 => x1.id == x.id))
.Union(ListB.Where(x => !ListA.Any(x1 => x1.id == x.id)));
I solved:
Just turn off USB debugging and re-enable debugging it immediately
@Override
public void onClick(View view) {
Intent phoneIntent = new Intent(Intent.ACTION_CALL);
phoneIntent.setData(Uri.parse("tel:91-000-000-0000"));
if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
return;
}
startActivity(phoneIntent);
}
When using Class based views, another option is to use the dispatch method. https://docs.djangoproject.com/en/2.2/ref/class-based-views/base/
Example Code:
Settings.py
LOGIN_URL = 'login'
LOGIN_REDIRECT_URL = 'home'
urls.py
from django.urls import path
from django.contrib.auth import views as auth_views
urlpatterns = [
path('', HomeView.as_view(), name='home'),
path('login/', auth_views.LoginView.as_view(),name='login'),
path('logout/', auth_views.LogoutView.as_view(), name='logout'),
]
views.py
from django.utils.decorators import method_decorator
from django.contrib.auth.decorators import login_required
from django.views.generic import View
from django.shortcuts import redirect
@method_decorator([login_required], name='dispatch')
class HomeView(View):
model = models.User
def dispatch(self, request, *args, **kwargs):
if not request.user.is_authenticated:
return redirect('login')
elif some-logic:
return redirect('some-page') #needs defined as valid url
return super(HomeView, self).dispatch(request, *args, **kwargs)
Declare a Flask endpoint to accept POST input type and then do necessary steps. Use jQuery to post the data.
from flask import request
@app.route('/parse_data', methods=['GET', 'POST'])
def parse_data(data):
if request.method == "POST":
#perform action here
var value = $('.textbox').val();
$.ajax({
type: 'POST',
url: "{{ url_for('parse_data') }}",
data: JSON.stringify(value),
contentType: 'application/json',
success: function(data){
// do something with the received data
}
});
The syntax may not be as pythonic as one might like, but it is a powerful library.
https://docs.python.org/2/library/decimal.html
from decimal import *
print(int(Decimal(2.3).quantize(Decimal('1.'), rounding=ROUND_UP)))
The proper interval to get one second is 1000. The Interval
property is the time between ticks in milliseconds:
So, it's not the interval that you set that is wrong. Check the rest of your code for something like changing the interval of the timer, or binding the Tick
event multiple times.
In my case I cloned a git-project where both Java and Kotlin included. Then checked another branch and pressed "Sync Project with Gradle Files". Android Studio 3.0.1.
There is no way how to declare an unsigned long or int in Java 8 or Java 9. But some methods treat them as if they were unsigned, for example:
static long values = Long.parseUnsignedLong("123456789012345678");
but this is not declaration of the variable.
Nevermind.
I had to look at the Lucene documentation. Seems I can use wildcards! :-)
curl http://localhost:9200/my_idx/my_type/_search?q=*Doe*
does the trick!
I've tried ControlBrushKey but it didn't work for unselected rows. The background for the unselected row was still white. But I've managed to find out that I have to override the rowstyle.
<DataGrid x:Name="pbSelectionDataGrid" Height="201" Margin="10,0"
FontSize="20" SelectionMode="Single" FontWeight="Bold">
<DataGrid.Resources>
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="#FFFDD47C"/>
<SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}" Color="#FFA6E09C"/>
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightTextBrushKey}" Color="Red"/>
<SolidColorBrush x:Key="{x:Static SystemColors.ControlTextBrushKey}" Color="Violet"/>
</DataGrid.Resources>
<DataGrid.RowStyle>
<Style TargetType="DataGridRow">
<Setter Property="Background" Value="LightBlue" />
</Style>
</DataGrid.RowStyle>
</DataGrid>
How about reinstalling the node module? Go to the root directory
of the project and remove the current node modules
and install again.
These are the commands : rm -rf node_modules npm install
OR
npm uninstall -g react-native-cli
and
npm install -g react-native-cli
In cpp, you need to pay special attention to string types when using execvp
:
#include <iostream>
#include <string>
#include <cstring>
#include <stdio.h>
#include <unistd.h>
using namespace std;
const size_t MAX_ARGC = 15; // 1 command + # of arguments
char* argv[MAX_ARGC + 1]; // Needs +1 because of the null terminator at the end
// c_str() converts string to const char*, strdup converts const char* to char*
argv[0] = strdup(command.c_str());
// start filling up the arguments after the first command
size_t arg_i = 1;
while (cin && arg_i < MAX_ARGC) {
string arg;
cin >> arg;
if (arg.empty()) {
argv[arg_i] = nullptr;
break;
} else {
argv[arg_i] = strdup(arg.c_str());
}
++arg_i;
}
// Run the command with arguments
if (execvp(command.c_str(), argv) == -1) {
// Print error if command not found
cerr << "command '" << command << "' not found\n";
}
Reference: execlp?execvp?????
pgrep -f youAppFile.py | xargs kill -9
pgrep
returns the PID of the specific file will only kill the specific application.
There are some good answers already. I'll focus mainly on what I think they lack - an explanation of the "cons" with the copy-and-swap idiom....
What is the copy-and-swap idiom?
A way of implementing the assignment operator in terms of a swap function:
X& operator=(X rhs)
{
swap(rhs);
return *this;
}
The fundamental idea is that:
the most error-prone part of assigning to an object is ensuring any resources the new state needs are acquired (e.g. memory, descriptors)
that acquisition can be attempted before modifying the current state of the object (i.e. *this
) if a copy of the new value is made, which is why rhs
is accepted by value (i.e. copied) rather than by reference
swapping the state of the local copy rhs
and *this
is usually relatively easy to do without potential failure/exceptions, given the local copy doesn't need any particular state afterwards (just needs state fit for the destructor to run, much as for an object being moved from in >= C++11)
When should it be used? (Which problems does it solve [/create]?)
When you want the assigned-to objected unaffected by an assignment that throws an exception, assuming you have or can write a swap
with strong exception guarantee, and ideally one that can't fail/throw
..†
When you want a clean, easy to understand, robust way to define the assignment operator in terms of (simpler) copy constructor, swap
and destructor functions.
† swap
throwing: it's generally possible to reliably swap data members that the objects track by pointer, but non-pointer data members that don't have a throw-free swap, or for which swapping has to be implemented as X tmp = lhs; lhs = rhs; rhs = tmp;
and copy-construction or assignment may throw, still have the potential to fail leaving some data members swapped and others not. This potential applies even to C++03 std::string
's as James comments on another answer:
@wilhelmtell: In C++03, there is no mention of exceptions potentially thrown by std::string::swap (which is called by std::swap). In C++0x, std::string::swap is noexcept and must not throw exceptions. – James McNellis Dec 22 '10 at 15:24
‡ assignment operator implementation that seems sane when assigning from a distinct object can easily fail for self-assignment. While it might seem unimaginable that client code would even attempt self-assignment, it can happen relatively easily during algo operations on containers, with x = f(x);
code where f
is (perhaps only for some #ifdef
branches) a macro ala #define f(x) x
or a function returning a reference to x
, or even (likely inefficient but concise) code like x = c1 ? x * 2 : c2 ? x / 2 : x;
). For example:
struct X
{
T* p_;
size_t size_;
X& operator=(const X& rhs)
{
delete[] p_; // OUCH!
p_ = new T[size_ = rhs.size_];
std::copy(p_, rhs.p_, rhs.p_ + rhs.size_);
}
...
};
On self-assignment, the above code delete's x.p_;
, points p_
at a newly allocated heap region, then attempts to read the uninitialised data therein (Undefined Behaviour), if that doesn't do anything too weird, copy
attempts a self-assignment to every just-destructed 'T'!
? The copy-and-swap idiom can introduce inefficiencies or limitations due to the use of an extra temporary (when the operator's parameter is copy-constructed):
struct Client
{
IP_Address ip_address_;
int socket_;
X(const X& rhs)
: ip_address_(rhs.ip_address_), socket_(connect(rhs.ip_address_))
{ }
};
Here, a hand-written Client::operator=
might check if *this
is already connected to the same server as rhs
(perhaps sending a "reset" code if useful), whereas the copy-and-swap approach would invoke the copy-constructor which would likely be written to open a distinct socket connection then close the original one. Not only could that mean a remote network interaction instead of a simple in-process variable copy, it could run afoul of client or server limits on socket resources or connections. (Of course this class has a pretty horrid interface, but that's another matter ;-P).
Javascript won't execute within a value attribute. You could do something like this, though:
<input id="date" name="date">
<script type="text/javascript">
document.getElementById('date').value = Date();
</script>
You'd probably want to format the date as you prefer, because the default output of Date() looks something like: Tue Jun 16 2009 10:47:10 GMT-0400 (Eastern Daylight Time)
. See this SO question for info about formatting a date.
When you create an initialization of the ResourceBundle, you can do this way also.
For testing and development I have created a properties file under \src with the name prp.properties.
Use this way:
ResourceBundle rb = ResourceBundle.getBundle("prp");
Naming convention and stuff:
http://192.9.162.55/developer/technicalArticles/Intl/ResourceBundles/
It seems that this warning occured when sending an empty response with a 200.
This configuration in my .htaccess
display the warning on Chrome:
Header always set Access-Control-Allow-Origin "*"
Header always set Access-Control-Allow-Methods "POST,GET,HEAD,OPTIONS,PUT,DELETE"
Header always set Access-Control-Allow-Headers "Access-Control-Allow-Headers, Origin,Accept, X-Requested-With, Content-Type, Access-Control-Request-Method, Access-Control-Request-Headers, Authorization"
RewriteEngine On
RewriteCond %{REQUEST_METHOD} OPTIONS
RewriteRule .* / [R=200,L]
But changing the last line to
RewriteRule .* / [R=204,L]
resolve the issue!
If you've just inserted a record into the Customers table and you need the value of the recently populated ID field, you can use the SCOPE_IDENTITY
function. This is only useful when the INSERT
has occurred within the same scope as the call to SCOPE_IDENTITY
.
INSERT INTO Customers(ID, FirstName, LastName)
Values
(23, 'Bob', 'Smith')
SET @mostRecentId = SCOPE_IDENTITY()
This may or may not be useful for you, but it's a good technique to be aware of. It will also work with auto-generated columns.
My working solution is:
cd /opt/genymobile/genymotion/tools
./adb shell
You have to use its own adb tool.
Use:
grep -- -X
Related: What does a bare double dash mean? (thanks to nutty about natty).
select <column list> into <dest. table> from <source table>;
You could do this way.
SELECT windows_release, windows_service_pack_level,
windows_sku, os_language_version
into new_table_name
FROM sys.dm_os_windows_info OPTION (RECOMPILE);
pip install --ignore-installed six
This will do the job, then you can try your first command.
You can attach an event listener as below. It will trigger whenever the div having selector #my-id
loads completely to DOM.
$(document).on('EventName', '#my-id', function() {
// do something
});
Inthis case EventName may be 'load' or 'click'
Use sort.
You just have to do this:
All elements in the list must implement the Comparable interface.
(Or use the version below it, as others already said.)
Perfect answer for AM/PM live time solution
<?php echo date('h:i A', time())?>
Include the port number with the IP address.
For example:
http://19.18.20.101:5566
where 5566 is the port number.
According to the documentation. You can use:
$locationProvider.html5Mode(true).hashPrefix('!');
NB: If your browser does not support to HTML 5. Dont worry :D it have fallback to hashbang mode. So, you don't need to check with
if(window.history && window.history.pushState){ ... }
manually
For example: If you click: <a href="/other">Some URL</a>
In HTML5 Browser:
angular will automatically redirect to example.com/other
In Not HTML5 Browser:
angular will automatically redirect to example.com/#!/other
The design of HTTP means that making a POST with data will return a page. The original designers probably intended for that to be a "result" page of your POST.
It is normal for a PHP application to POST back to the same page as it can not only process the POST request, but it can generate an updated page based on the original GET but with the new information from the POST. However, there's nothing stopping your server code from providing completely different output. Alternatively, you could POST to an entirely different page.
If you don't want the output, one method that I've seen before AJAX took off was for the server to return a HTTP response code of (I think) 250. This is called "No Content" and this should make the browser ignore the data.
Of course, the third method is to make an AJAX call with your submitted data, instead.
You can save generated diagram for future use.
These days, the most popular (and very simple) option is the ElementTree API, which has been included in the standard library since Python 2.5.
The available options for that are:
Here's an example of how to generate your example document using the in-stdlib cElementTree:
import xml.etree.cElementTree as ET
root = ET.Element("root")
doc = ET.SubElement(root, "doc")
ET.SubElement(doc, "field1", name="blah").text = "some value1"
ET.SubElement(doc, "field2", name="asdfasd").text = "some vlaue2"
tree = ET.ElementTree(root)
tree.write("filename.xml")
I've tested it and it works, but I'm assuming whitespace isn't significant. If you need "prettyprint" indentation, let me know and I'll look up how to do that. (It may be an LXML-specific option. I don't use the stdlib implementation much)
For further reading, here are some useful links:
As a final note, either cElementTree or LXML should be fast enough for all your needs (both are optimized C code), but in the event you're in a situation where you need to squeeze out every last bit of performance, the benchmarks on the LXML site indicate that:
In PowerShell v5+, there is an Expand-Archive command (as well as Compress-Archive) built in:
Expand-Archive c:\a.zip -DestinationPath c:\a
<?php
list($width, $height) = getimagesize("http://site.com/image.png");
$arr = array('h' => $height, 'w' => $width );
?>
For easy understand can see my figure.
Rebase will change commit hash, so that if you want to avoid much of conflict, just use rebase when that branch is done/complete as stable.
I prefer this
WHERE CASE WHEN my_col LIKE '%val1%' THEN 1
WHEN my_col LIKE '%val2%' THEN 1
WHEN my_col LIKE '%val3%' THEN 1
ELSE 0
END = 1
I'm not saying it's optimal but it works and it's easily understood. Most of my queries are adhoc used once so performance is generally not an issue for me.
You can pass string parameters to JavaScript functions like below code:
I passed three parameters where the third one is a string parameter.
var btn ="<input type='button' onclick='RoomIsReadyFunc(" + ID + "," + RefId + ",\"" + YourString + "\");' value='Room is Ready' />";
// Your JavaScript function
function RoomIsReadyFunc(ID, RefId, YourString)
{
alert(ID);
alert(RefId);
alert(YourString);
}
Because in Python 3, print statement
has been replaced with a print() function
, with keyword arguments to replace most of the special syntax of the old print statement. So you have to write it as
print("Hello World")
But if you write this in a program and someone using Python 2.x tries to run it, they will get an error. To avoid this, it is a good practice to import print function:
from __future__ import print_function
Now your code works on both 2.x & 3.x.
Check out below examples also to get familiar with print() function.
Old: print "The answer is", 2*2
New: print("The answer is", 2*2)
Old: print x, # Trailing comma suppresses newline
New: print(x, end=" ") # Appends a space instead of a newline
Old: print # Prints a newline
New: print() # You must call the function!
Old: print >>sys.stderr, "fatal error"
New: print("fatal error", file=sys.stderr)
Old: print (x, y) # prints repr((x, y))
New: print((x, y)) # Not the same as print(x, y)!
Source: What’s New In Python 3.0?
In order to make more concise you can declare constructor parameters as public
which automatically create properties with same names and these properties are available via this
:
export class Environment {
constructor(public id:number, public name:string) {}
getProperties() {
return `${this.id} : ${this.name}`;
}
}
let serverEnv = new Environment(80, 'port');
console.log(serverEnv);
---result---
// Environment { id: 80, name: 'port' }
To replace one or more white space characters by a single blank you should use {2,}
instead of *
, otherwise you would insert
a blank between all non-blank characters.
REGEXP_REPLACE( my_value, '[[:space:]]{2,}', ' ' )
Using Promise
and checking if the body
object is a valid JSON. If not a Promise reject
will be returned.
var DoPost = function(url, body) {
try {
body = JSON.stringify(body);
} catch (error) {
return reject(error);
}
return new Promise((resolve, reject) => {
$.ajax({
type: 'POST',
url: url,
data: body,
contentType: "application/json",
dataType: 'json'
})
.done(function(data) {
return resolve(data);
})
.fail(function(error) {
console.error(error);
return reject(error);
})
.always(function() {
// called after done or fail
});
});
}
To solve the problem I use ${string_prompt} variable. It shows a input dialog when application runs. I can set the date/time manually at that dialog.
I spent a while trying to do the same thing, trying to subtract the hours:minutes
from datetime
- here's how I did it:
convert( varchar, cast((RouteMileage / @average_speed) as integer))+ ':' + convert( varchar, cast((((RouteMileage / @average_speed) - cast((RouteMileage / @average_speed) as integer)) * 60) as integer)) As TravelTime,
dateadd( n, -60 * CAST( (RouteMileage / @average_speed) AS DECIMAL(7,2)), @entry_date) As DepartureTime
DeliveryDate TravelTime DepartureTime
2012-06-02 12:00:00.000 25:49 2012-06-01 10:11:00.000
You can just tell Finder to open the .sh
file in Terminal:
This will have the exact same effect as renaming it to .command
except… you don't have to rename it :)
This is how you save the relevant file as a Excel12 (.xlsx) file... It is not as you would intuitively think i.e. using Excel.XlFileFormat.xlExcel12
but Excel.XlFileFormat.xlOpenXMLWorkbook
. The actual C# command was
excelWorkbook.SaveAs(strFullFilePathNoExt, Excel.XlFileFormat.xlOpenXMLWorkbook, Missing.Value,
Missing.Value, false, false, Excel.XlSaveAsAccessMode.xlNoChange,
Excel.XlSaveConflictResolution.xlUserResolution, true,
Missing.Value, Missing.Value, Missing.Value);
I hope this helps someone else in the future.
Missing.Value
is found in the System.Reflection
namespace.
Pictures are worth a thousand Unix commands and options:
I draw this to my students each semester and they seem to grasp vi afterwards.
vi is a finite state machine with only three states.
Upon starting, vi goes into COMMAND mode, where you can type short, few character commands, blindly. You know what you are doing; this isn't for amateurs.
When you want to actually edit text, you should go to INSERT mode with some one-character command:
Now, answering the question: exiting.
You can exit vi from EX mode:
w
and x
accept a file name parameter. If you started vi with a filename, you need not give it here again.
At last, the most important: how can you reach EX mode?
EX mode is for long commands that you can see typing at the bottom line of the screen. From COMMAND mode, you push colon, :
, and a colon will appear at the bottom line, where you can type the above commands.
From INSERT mode, you need to push ESC, i.e. the Escape button, going to COMMAND mode, and then : to go to EX mode.
If you are unsure, push ESC and that will bring you to command mode.
So, the robust method is ESC-:-x-Enter which saves your file and quits.
I use Kotlin extensions for showing and hiding the Keyboard.
fun View.showKeyboard() {
this.requestFocus()
val inputMethodManager = context.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
inputMethodManager.showSoftInput(this, InputMethodManager.SHOW_IMPLICIT)
}
fun View.hideKeyboard() {
val inputMethodManager = context.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
inputMethodManager.hideSoftInputFromWindow(windowToken, 0)
}
You just need to use these commands
sudo rm -rf /Library/Java/*
sudo rm -rf /Library/PreferencePanes/Java*
sudo rm -rf /Library/Internet\ Plug-Ins/Java*
Write-back and write-through describe policies when a write hit occurs, that is when the cache has the requested information. In these examples, we assume a single processor is writing to main memory with a cache.
Write-through: The information is written to the cache and memory, and the write finishes when both have finished. This has the advantage of being simpler to implement, and the main memory is always consistent (in sync) with the cache (for the uniprocessor case - if some other device modifies main memory, then this policy is not enough), and a read miss never results in writes to main memory. The obvious disadvantage is that every write hit has to do two writes, one of which accesses slower main memory.
Write-back: The information is written to a block in the cache. The modified cache block is only written to memory when it is replaced (in effect, a lazy write). A special bit for each cache block, the dirty bit, marks whether or not the cache block has been modified while in the cache. If the dirty bit is not set, the cache block is "clean" and a write miss does not have to write the block to memory.
The advantage is that writes can occur at the speed of the cache, and if writing within the same block only one write to main memory is needed (when the previous block is being replaced). The disadvantages are that this protocol is harder to implement, main memory can be not consistent (not in sync) with the cache, and reads that result in replacement may cause writes of dirty blocks to main memory.
The policies for a write miss are detailed in my first link.
These protocols don't take care of the cases with multiple processors and multiple caches, as is common in modern processors. For this, more complicated cache coherence mechanisms are required. Write-through caches have simpler protocols since a write to the cache is immediately reflected in memory.
Good resources:
Use str.join
:
>>> tup = ('a', 'b', 'c', 'd', 'g', 'x', 'r', 'e')
>>> ''.join(tup)
'abcdgxre'
>>>
>>> help(str.join)
Help on method_descriptor:
join(...)
S.join(iterable) -> str
Return a string which is the concatenation of the strings in the
iterable. The separator between elements is S.
>>>
If you don't want to use the elasticdump like a console tool. You can use next node.js script
class Grandpa
{
public function __construct()
{}
}
class Papa extends Grandpa
{
public function __construct()
{
//call Grandpa's constructor
parent::__construct();
}
}
class Kiddo extends Papa
{
public function __construct()
{
//this is not a bug, it works that way in php
Grandpa::__construct();
}
}
If you want to pass the variable to your proxy backend, you have to set it with the proxy module.
location / {
proxy_pass http://example.com;
proxy_set_header Host example.com;
proxy_set_header HTTP_Country-Code $geoip_country_code;
proxy_pass_request_headers on;
}
And now it's passed to the proxy backend.
This is the perfect code for uploading and displaying image through MySQL database.
<html>
<body>
<form method="post" enctype="multipart/form-data">
<input type="file" name="image"/>
<input type="submit" name="submit" value="Upload"/>
</form>
<?php
if(isset($_POST['submit']))
{
if(getimagesize($_FILES['image']['tmp_name'])==FALSE)
{
echo " error ";
}
else
{
$image = $_FILES['image']['tmp_name'];
$image = addslashes(file_get_contents($image));
saveimage($image);
}
}
function saveimage($image)
{
$dbcon=mysqli_connect('localhost','root','','dbname');
$qry="insert into tablename (name) values ('$image')";
$result=mysqli_query($dbcon,$qry);
if($result)
{
echo " <br/>Image uploaded.";
header('location:urlofpage.php');
}
else
{
echo " error ";
}
}
?>
</body>
</html>
I forgot to tell a bug when i use I use req.session.email = req.param('email'), the server error says cannot sett property email of undefined.
The reason of this error is a wrong order of app.use. You must configure express in this order:
app.use(express.cookieParser());
app.use(express.session({ secret: sessionVal }));
app.use(app.route);
I agree with the last answer.But there is another way to solve this problem.You can download the package named future,such as pip install future.And in your .py file input this "from past.builtins import xrange".This method is for the situation that there are many xranges in your file.
like this:
public class ScreenUtils {
public static float dpToPx(Context context, float dp) {
if (context == null) {
return -1;
}
return dp * context.getResources().getDisplayMetrics().density;
}
public static float pxToDp(Context context, float px) {
if (context == null) {
return -1;
}
return px / context.getResources().getDisplayMetrics().density;
}
}
dependent on Context, return float value, static method
The easiest way is to use mysql_result
.
I copied some of the code below from other answers to save time.
$link = mysql_connect('localhost','root','yourPassword')
mysql_select_db('database',$link);
$sql = 'SELECT id FROM games'
$result = mysql_query($sql,$link);
$num_rows = mysql_num_rows($result);
// i is the row number and will be 0 through $num_rows-1
for ($i = 0; $i < $num_rows; $i++) {
$value = mysql_result($result, i, 'id');
echo 'Row ', i, ': ', $value, "\n";
}
Relating to 'SSL certificate problem: unable to get local issuer certificate' error. It is important to note that this applies to the system sending the CURL request, and NOT the server receiving the request.
Download the latest cacert.pem from https://curl.haxx.se/ca/cacert.pem
Add the following line to php.ini: (if this is shared hosting and you don't have access to php.ini then you could add this to .user.ini in public_html).
curl.cainfo="/path/to/downloaded/cacert.pem"
Make sure you enclose the path within double quotation marks!!!
By default, the FastCGI process will parse new files every 300 seconds (if required you can change the frequency by adding a couple of files as suggested here https://ss88.uk/blog/fast-cgi-and-user-ini-files-the-new-htaccess/).
SQL databases like Oracle, db2 also support Horizontal scaling through Shared disk cluster. For example Oracle RAC, IBM DB2 purescale or Sybase ASE Cluster edition. New node can be added to Oracle RAC system or DB2 purescale system to achieve horizontal scaling.
But the approach is different from noSQL databases (like mongodb, CouchDB or IBM Cloudant) is that the data sharding is not part of Horizontal scaling. In noSQL databases data is shraded during horizontal scaling.
Just use before and after Pseudo-elements - CSS
*{box-sizing: border-box; padding: 0; margin: 0}_x000D_
:root{background: white; transition: background .3s ease-in-out}_x000D_
:root:hover{background: red }_x000D_
div{_x000D_
margin: 20px auto;_x000D_
width: 150px;_x000D_
height: 150px;_x000D_
position:relative_x000D_
}_x000D_
_x000D_
div:before, div:after{_x000D_
content: '';_x000D_
position: absolute;_x000D_
width: 75px;_x000D_
height: 20px;_x000D_
background: black;_x000D_
left: 40px_x000D_
}_x000D_
_x000D_
div:before{_x000D_
top: 45px;_x000D_
transform: rotateZ(45deg)_x000D_
}_x000D_
_x000D_
div:after{_x000D_
bottom: 45px;_x000D_
transform: rotateZ(-45deg)_x000D_
}
_x000D_
<div/>
_x000D_
A cleaner alternative of putting your config file into a subfolder of src/main/resources would be to enhance your classpath locations. This is extremely easy to do with Maven.
For instance, place your property file in a new folder src/main/config, and add the following to your pom:
<build>
<resources>
<resource>
<directory>src/main/config</directory>
</resource>
</resources>
</build>
From now, every files files under src/main/config is considered as part of your classpath (note that you can exclude some of them from the final jar if needed: just add in the build section:
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<excludes>
<exclude>my-config.properties</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
so that my-config.properties can be found in your classpath when you run your app from your IDE, but will remain external from your jar in your final distribution).
It's not easy to find a full solution of the problem of a convertion of an arbitrary HTML to PDF with non-english letters in Android. I test it for russian unicode letters.
We use three libraries:
(1) Jsoup (jsoup-1.7.3.jar) for a convertion from HTML to XHTML,
(2) iTextPDF (itextpdf-5.5.0.jar),
(3) XMLWorker (xmlworker-5.5.1.jar).
public boolean createPDF(String rawHTML, String fileName, ContextWrapper context){
final String APPLICATION_PACKAGE_NAME = context.getBaseContext().getPackageName();
File path = new File( Environment.getExternalStorageDirectory(), APPLICATION_PACKAGE_NAME );
if ( !path.exists() ){ path.mkdir(); }
File file = new File(path, fileName);
try{
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(file));
document.open();
// ?????????????? HTML
String htmlText = Jsoup.clean( rawHTML, Whitelist.relaxed() );
InputStream inputStream = new ByteArrayInputStream( htmlText.getBytes() );
// ???????? ???????? PDF
XMLWorkerHelper.getInstance().parseXHtml(writer, document,
inputStream, null, Charset.defaultCharset(), new MyFont());
document.close();
return true;
} catch (FileNotFoundException e) {
e.printStackTrace();
return false;
} catch (DocumentException e) {
e.printStackTrace();
return false;
} catch (IOException e) {
e.printStackTrace();
return false;
}
The difficult problem is to display russian letters in PDF by using iTextPDF XMLWorker library. For this we should create our own implementation of FontProvider interface:
public class MyFont implements FontProvider{
private static final String FONT_PATH = "/system/fonts/DroidSans.ttf";
private static final String FONT_ALIAS = "my_font";
public MyFont(){ FontFactory.register(FONT_PATH, FONT_ALIAS); }
@Override
public Font getFont(String fontname, String encoding, boolean embedded,
float size, int style, BaseColor color){
return FontFactory.getFont(FONT_ALIAS, BaseFont.IDENTITY_H,
BaseFont.EMBEDDED, size, style, color);
}
@Override
public boolean isRegistered(String name) { return name.equals( FONT_ALIAS ); }
}
Here we use the standard Android font Droid Sans, which is located in the system folder:
private static final String FONT_PATH = "/system/fonts/DroidSans.ttf";
pip install --upgrade --force-reinstall <package>
When upgrading, reinstall all packages even if they are already up-to-date.
pip install -I <package>
pip install --ignore-installed <package>
Ignore the installed packages (reinstalling instead).
Inside Controller Action you can access HttpContext.Response. There you can set the response status as in the following listing.
[HttpPost]
public ActionResult PostViaAjax()
{
var body = Request.BinaryRead(Request.TotalBytes);
var result = Content(JsonError(new Dictionary<string, string>()
{
{"err", "Some error!"}
}), "application/json; charset=utf-8");
HttpContext.Response.StatusCode = (int)HttpStatusCode.BadRequest;
return result;
}
You could use
<link rel="shortcut icon" href="http://localhost/" />
That way it won't actually be requested from the server.
A more direct equivalent to a instanceof B
is
B.class.isInstance(a)
This works (returns false) when a
is null
too.
Yes, you can use numpy
for that.
import numpy as np
a = arange(3,dtype=float)
a[0] = np.nan
a[1] = np.inf
a[2] = -np.inf
a # is now [nan,inf,-inf]
np.isnan(a[0]) # True
np.isinf(a[1]) # True
np.isinf(a[2]) # True
You can also do this on-the-fly by entering the following into the debugger
po [[NSString alloc] initWithData:[NSJSONSerialization dataWithJSONObject:yourDictionary options:1 error:nil] encoding:4];
I had the same problem: sqlite3.IntegrityError
As mentioned in many answers, the problem is that a connection has not been properly closed.
In my case I had try
except
blocks. I was accessing the database in the try
block and when an exception was raised I wanted to do something else in the except
block.
try:
conn = sqlite3.connect(path)
cur = conn.cursor()
cur.execute('''INSERT INTO ...''')
except:
conn = sqlite3.connect(path)
cur = conn.cursor()
cur.execute('''DELETE FROM ...''')
cur.execute('''INSERT INTO ...''')
However, when the exception was being raised the connection from the try
block had not been closed.
I solved it using with
statements inside the blocks.
try:
with sqlite3.connect(path) as conn:
cur = conn.cursor()
cur.execute('''INSERT INTO ...''')
except:
with sqlite3.connect(path) as conn:
cur = conn.cursor()
cur.execute('''DELETE FROM ...''')
cur.execute('''INSERT INTO ...''')
EDIT: I'm getting a lot of downvotes on this recently...so I thought I'd just add a note that this answer was written before the question underwent it's most recent edit, where returning null was highlighted as an option...which seems very acceptable. Some of my answer was addressed to concerns like that of Edwardo, in the comments, who seemed to be advocating returning a 0. This is the case I was railing against.
ANSWER: I think there's an underlying issue here, which is that division by 0 is not legal. It's an indication that something is fundementally wrong. If you're dividing by zero, you're trying to do something that doesn't make sense mathematically, so no numeric answer you can get will be valid. (Use of null in this case is reasonable, as it is not a value that will be used in later mathematical calculations).
So Edwardo asks in the comments "what if the user puts in a 0?", and he advocates that it should be okay to get a 0 in return. If the user puts zero in the amount, and you want 0 returned when they do that, then you should put in code at the business rules level to catch that value and return 0...not have some special case where division by 0 = 0.
That's a subtle difference, but it's important...because the next time someone calls your function and expects it to do the right thing, and it does something funky that isn't mathematically correct, but just handles the particular edge case it's got a good chance of biting someone later. You're not really dividing by 0...you're just returning an bad answer to a bad question.
Imagine I'm coding something, and I screw it up. I should be reading in a radiation measurement scaling value, but in a strange edge case I didn't anticipate, I read in 0. I then drop my value into your function...you return me a 0! Hurray, no radiation! Except it's really there and it's just that I was passing in a bad value...but I have no idea. I want division to throw the error because it's the flag that something is wrong.
I found the solution with following steps:
Oracle.DataAcces.dll
reference,C:\windows\assembly\GAC\Oracle.DataAccess\X.XXX.X.XX__89b483f429c47342/oracle.dataaccess.dll
Hope it helps
Assume that the content of YourClass.py is:
class YourClass:
# ......
If you use:
from YourClassParentDir import YourClass # means YourClass.py
In this way, I got TypeError: 'module' object is not callable if you then tried to use YourClass()
.
But, if you use:
from YourClassParentDir.YourClass import YourClass # means Class YourClass
or use YourClass.YourClass()
, it works for me.
You can also pass events down into child components with something like this:
<CustomComponent
@keyup.enter="handleKeyUp"
/>
...
<template>
<div>
<input
type="text"
v-on="$listeners"
>
</div>
</template>
<script>
export default {
name: 'CustomComponent',
mounted() {
console.log('listeners', this.$listeners)
},
}
</script>
That works well if you have a pass-through component and want the listeners to go onto a specific element.
Android parcable has some unique things. Those are given bellow:
Example: To make a class Parceble it must be implement Parceble. Percable has 2 method:
int describeContents();
void writeToParcel(Parcel var1, int var2);
Suppose you have a Person class and it has 3 field, firstName,lastName and age. After implementing Parceble interface. this interface is given bellow:
import android.os.Parcel;
import android.os.Parcelable;
public class Person implements Parcelable{
private String firstName;
private String lastName;
private int age;
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getFirstName() {
return firstName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getLastName() {
return lastName;
}
public void setAge(int age) {
this.age = age;
}
public int getAge() {
return age;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel parcel, int i) {
parcel.writeString(firstName);
parcel.writeString(lastName);
parcel.writeInt(age);
}
}
Here writeToParcel
method we are writing/adding data on Parcel in an order. After this we have to add bellow code for reading data from parcel:
protected Person(Parcel in) {
firstName = in.readString();
lastName = in.readString();
age = in.readInt();
}
public static final Creator<Person> CREATOR = new Creator<Person>() {
@Override
public Person createFromParcel(Parcel in) {
return new Person(in);
}
@Override
public Person[] newArray(int size) {
return new Person[size];
}
};
Here, Person class is taking a parcel and getting data in same an order during writing.
Now during intent getExtra
and putExtra
code is given bellow:
Put in Extra:
Person person=new Person();
person.setFirstName("First");
person.setLastName("Name");
person.setAge(30);
Intent intent = new Intent(getApplicationContext(), SECOND_ACTIVITY.class);
intent.putExtra()
startActivity(intent);
Get Extra:
Person person=getIntent().getParcelableExtra("person");
Full Person class is given bellow:
import android.os.Parcel;
import android.os.Parcelable;
public class Person implements Parcelable{
private String firstName;
private String lastName;
private int age;
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getFirstName() {
return firstName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getLastName() {
return lastName;
}
public void setAge(int age) {
this.age = age;
}
public int getAge() {
return age;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel parcel, int i) {
parcel.writeString(firstName);
parcel.writeString(lastName);
parcel.writeInt(age);
}
protected Person(Parcel in) {
firstName = in.readString();
lastName = in.readString();
age = in.readInt();
}
public static final Creator<Person> CREATOR = new Creator<Person>() {
@Override
public Person createFromParcel(Parcel in) {
return new Person(in);
}
@Override
public Person[] newArray(int size) {
return new Person[size];
}
};
}
Hope this will help you
Thanks :)
<Container>
<Menu>
<MenuItem Header="File">
<MenuItem Header="New">
<MenuItem Header="File1"/>
<MenuItem Header="File2"/>
<MenuItem Header="File3"/>
</MenuItem>
<MenuItem Header="Open"/>
<MenuItem Header="Save"/>
</MenuItem>
</Menu>
</Container>
This answer is for MacOs Catalina
user or zsh
users as your Mac now uses zsh as the default login shell and interactive shell.
If you follow along with the docs of React Native Setting up the development environment
guide. Then do the following.
Firstly check if local.properties
file exists or not.
If the file does not exist then create and add the following line.
sdk.dir=/Users/<youcomputername>/Library/Android/sdk
After doing the above changes now do the following.
~/.zshrc
using a code-editor. In my case I use vimvim ~/.zshrc
export ANDROID_HOME="/Users/<yourcomputername>/Library/Android/sdk"
export PATH=$ANDROID_HOME/emulator:$PATH
export PATH=$ANDROID_HOME/tools:$PATH
export PATH=$ANDROID_HOME/tools/bin:$PATH
export PATH=$ANDROID_HOME/platform-tools:$PATH
Make sure to add the above line correctly else it will give you a weird error.
Save the changes and close the editor.
Finally, now compile your changes
source ~/.zshrc
I get this working in my case. I hope this helps you.
Does your DLL project have any actual exports? If there are no exports, the linker will not generate an import library .lib file.
In the non-Express version of VS, the import libray name is specfied in the project settings here:
Configuration Properties/Linker/Advanced/Import Library
I assume it's the same in Express (if it even provides the ability to configure the name).
//convert Image to Base64 (Encoding)
let strBase64 = imageData.base64EncodedString(options: .lineLength64Characters)
print(strBase64)
// convert Base64 to Image (Decoding)
let dataDecoded:NSData = NSData(base64EncodedString: strBase64, options: NSDataBase64DecodingOptions(rawValue: 0))!
let decodedimage:UIImage = UIImage(data: dataDecoded)!
print(decodedimage)
yourImageView.image = decodedimage
This is a terrible idea, but it does work.
public enum myEnum
{
ThisNameWorks,
ThisNameDoesntWork149141331,// This Name doesn't work
NeitherDoesThis1849204824// Neither.does.this;
}
class Program
{
private static unsafe void ChangeString(string original, string replacement)
{
if (original.Length < replacement.Length)
throw new ArgumentException();
fixed (char* pDst = original)
fixed (char* pSrc = replacement)
{
// Update the length of the original string
int* lenPtr = (int*)pDst;
lenPtr[-1] = replacement.Length;
// Copy the characters
for (int i = 0; i < replacement.Length; i++)
pDst[i] = pSrc[i];
}
}
public static unsafe void Initialize()
{
ChangeString(myEnum.ThisNameDoesntWork149141331.ToString(), "This Name doesn't work");
ChangeString(myEnum.NeitherDoesThis1849204824.ToString(), "Neither.does.this");
}
static void Main(string[] args)
{
Console.WriteLine(myEnum.ThisNameWorks);
Console.WriteLine(myEnum.ThisNameDoesntWork149141331);
Console.WriteLine(myEnum.NeitherDoesThis1849204824);
Initialize();
Console.WriteLine(myEnum.ThisNameWorks);
Console.WriteLine(myEnum.ThisNameDoesntWork149141331);
Console.WriteLine(myEnum.NeitherDoesThis1849204824);
}
Requirements
Your enum names must have the same number of characters or more than the string that you want to it to be.
Your enum names shouldn't be repeated anywhere, just in case string interning messes things up
Why this is a bad idea (a few reasons)
Your enum names become ugly beause of the requirements
It relies on you calling the initialization method early enough
Unsafe pointers
If the internal format of string changes, e.g. if the length field is moved, you're screwed
If Enum.ToString() is ever changed so that it returns only a copy, you're screwed
Raymond Chen will complain about your use of undocumented features, and how it's your fault that the CLR team couldn't make an optimization to cut run time by 50%, during his next .NET week.
For full-screen frame redirects and similar things I have two methods. Both work fine on mobile and desktop.
Note this are complete cross-browser working, valid HTML files. Just change title
and src
for your needs.
1. this is my favorite:
<!DOCTYPE html>
<meta charset=utf-8>
<title> Title-1 </title>
<meta name=viewport content="width=device-width">
<style>
html, body, iframe { height:100%; width:100%; margin:0; border:0; display:block }
</style>
<iframe src=src1></iframe>
<!-- More verbose CSS for better understanding:
html { height:100% }
body { height:100%; margin:0 }
iframe { height:100%; width:100%; border:0; display:block }
-->
or 2. something like that, slightly shorter:
<!DOCTYPE html>
<meta charset=utf-8>
<title> Title-2 </title>
<meta name=viewport content="width=device-width">
<iframe src=src2 style="position:absolute; top:0; left:0; width:100%; height:100%; border:0">
</iframe>
Note:
The above examples avoid using height:100vh
because old browsers don't know it (maybe moot these days) and height:100vh
is not always equal to height:100%
on mobile browsers (probably not applicable here). Otherwise, vh
simplifies things a little bit, so
3. this is an example using vh (not my favorite, less compatible with little advantage)
<!DOCTYPE html>
<meta charset=utf-8>
<title> Title-3 </title>
<meta name=viewport content="width=device-width">
<style>
body { margin:0 }
iframe { display:block; width:100%; height:100vh; border:0 }
</style>
<iframe src=src3></iframe>
You could search for:
<li><a href="#">[^\n]+
And replace with:
$0</a>
Where $0
is the whole match. The exact semantics will depend on the language are you using though.
WARNING: You should avoid parsing HTML with regex. Here's why.
If you need just update your records in energydata
based on data in temp_energydata
, assuming that temp_enerydata
doesn't contain any new records, then try this:
UPDATE e SET e.kWh = t.kWh
FROM energydata e INNER JOIN
temp_energydata t ON e.webmeterID = t.webmeterID AND
e.DateTime = t.DateTime
Here is working sqlfiddle
But if temp_energydata
contains new records and you need to insert it to energydata
preferably with one statement then you should definitely go with the answer that Bacon Bits gave.
May be by:-
for(Row row : sheet) {
for(Cell cell : row) {
System.out.print(cell.getStringCellValue());
}
}
For specific type of cell you can try:
switch (cell.getCellType()) {
case Cell.CELL_TYPE_STRING:
cellValue = cell.getStringCellValue();
break;
case Cell.CELL_TYPE_FORMULA:
cellValue = cell.getCellFormula();
break;
case Cell.CELL_TYPE_NUMERIC:
if (DateUtil.isCellDateFormatted(cell)) {
cellValue = cell.getDateCellValue().toString();
} else {
cellValue = Double.toString(cell.getNumericCellValue());
}
break;
case Cell.CELL_TYPE_BLANK:
cellValue = "";
break;
case Cell.CELL_TYPE_BOOLEAN:
cellValue = Boolean.toString(cell.getBooleanCellValue());
break;
}
I spent a lot of time looking for a solution to this problem too. Here's what i've found thus far:
If you want your users to be able to click on a button and copy some text, you may have to use Flash.
If you want your users to press Ctrl+C anywhere on the page, but always copy xyz to the clipboard, I wrote an all-JS solution in YUI3 (although it could easily be ported to other frameworks, or raw JS if you're feeling particularly self-loathing).
It involves creating a textbox off the screen which gets highlighted as soon as the user hits Ctrl/CMD. When they hit 'C' shortly after, they copy the hidden text. If they hit 'V', they get redirected to a container (of your choice) before the paste event fires.
This method can work well, because while you listen for the Ctrl/CMD keydown anywhere in the body, the 'A', 'C' or 'V' keydown listeners only attach to the hidden text box (and not the whole body). It also doesn't have to break the users expectations - you only get redirected to the hidden box if you had nothing selected to copy anyway!
Here's what i've got working on my site, but check http://at.cg/js/clipboard.js for updates if there are any:
YUI.add('clipboard', function(Y) {
// Change this to the id of the text area you would like to always paste in to:
pasteBox = Y.one('#pasteDIV');
// Make a hidden textbox somewhere off the page.
Y.one('body').append('<input id="copyBox" type="text" name="result" style="position:fixed; top:-20%;" onkeyup="pasteBox.focus()">');
copyBox = Y.one('#copyBox');
// Key bindings for Ctrl+A, Ctrl+C, Ctrl+V, etc:
// Catch Ctrl/Window/Apple keydown anywhere on the page.
Y.on('key', function(e) {
copyData();
// Uncomment below alert and remove keyCodes after 'down:' to figure out keyCodes for other buttons.
// alert(e.keyCode);
// }, 'body', 'down:', Y);
}, 'body', 'down:91,224,17', Y);
// Catch V - BUT ONLY WHEN PRESSED IN THE copyBox!!!
Y.on('key', function(e) {
// Oh no! The user wants to paste, but their about to paste into the hidden #copyBox!!
// Luckily, pastes happen on keyPress (which is why if you hold down the V you get lots of pastes), and we caught the V on keyDown (before keyPress).
// Thus, if we're quick, we can redirect the user to the right box and they can unload their paste into the appropriate container. phew.
pasteBox.select();
}, '#copyBox', 'down:86', Y);
// Catch A - BUT ONLY WHEN PRESSED IN THE copyBox!!!
Y.on('key', function(e) {
// User wants to select all - but he/she is in the hidden #copyBox! That wont do.. select the pasteBox instead (which is probably where they wanted to be).
pasteBox.select();
}, '#copyBox', 'down:65', Y);
// What to do when keybindings are fired:
// User has pressed Ctrl/Meta, and is probably about to press A,C or V. If they've got nothing selected, or have selected what you want them to copy, redirect to the hidden copyBox!
function copyData() {
var txt = '';
// props to Sabarinathan Arthanari for sharing with the world how to get the selected text on a page, cheers mate!
if (window.getSelection) { txt = window.getSelection(); }
else if (document.getSelection) { txt = document.getSelection(); }
else if (document.selection) { txt = document.selection.createRange().text; }
else alert('Something went wrong and I have no idea why - please contact me with your browser type (Firefox, Safari, etc) and what you tried to copy and I will fix this immediately!');
// If the user has nothing selected after pressing Ctrl/Meta, they might want to copy what you want them to copy.
if(txt=='') {
copyBox.select();
}
// They also might have manually selected what you wanted them to copy! How unnecessary! Maybe now is the time to tell them how silly they are..?!
else if (txt == copyBox.get('value')) {
alert('This site uses advanced copy/paste technology, possibly from the future.\n \nYou do not need to select things manually - just press Ctrl+C! \n \n(Ctrl+V will always paste to the main box too.)');
copyBox.select();
} else {
// They also might have selected something completely different! If so, let them. It's only fair.
}
}
});
Hope someone else finds this useful :]
As stated in other answers, label is an inline element. However, you can apply display: inline-block
to the label and then center with text-align
.
#name_label {
display: inline-block;
width: 90%;
text-align: right;
}
Why display: inline-block
and not display: inline
? For the same reason that you can't align label
, it's inline.
Why display: inline-block
and not display: block
? You could use display: block
, but it will be on another line. display: inline-block
combines the properties of inline
and block
. It's inline, but you can also give it a width, height, and align it.
Meder Omuraliev suggested to use an event handler and set scrollTo(0,0). This is an example for Wassim-azirar. Bringing it all together, I assume this is the final solution.
We have 3 problems: the scrollbar, scrolling with mouse, and keyboard. This hides the scrollbar:
html, body{overflow:hidden;}
Unfortunally, you can still scroll with the keyboard: To prevent this, we can:
function keydownHandler(e) {
var evt = e ? e:event;
var keyCode = evt.keyCode;
if (keyCode==38 || keyCode==39 || keyCode==40 || keyCode==37){ //arrow keys
e.preventDefault()
scrollTo(0,0);
}
}
document.onkeydown=keydownHandler;
The scrolling with the mouse just naturally doesn't work after this code, so we have prevented the scrolling.
For example: https://jsfiddle.net/aL7pes70/1/
To address specific scenario in question:
@Test
public void Test1() {
}
@Test (dependsOnMethods={"Test1"})
public void Test2() {
}
@Test (dependsOnMethods={"Test2"})
public void Test3() {
}
I see most of the developers use inline query without looking out it's impact on huge data.
in simple you can achieve this by:
select a.chargeId, a.chargeType, a.serviceMonth
from invoice a
left outer join invoice b
on a.chargeId=b.chargeId and a.serviceMonth <b.serviceMonth
where b.chargeId is null
order by a.serviceMonth desc
There are actually some options available:
You can use SizedBox.expand to make your widget match parents dimensions, or SizedBox(width: double.infinity) to match only the width or SizedBox(heigth: double.infinity) to match only the heigth.
If you want a wrap_content behavior it depends on the parent widget you are using, for example if you put a button on a column it will behave like wrap_content and to use it like match_parent you can wrap the button with a Expanded widget or a sizedbox.
With a ListView the button gets a match_parent behavior and to get a wrap_content behavior you can wrap it with a Flex widget like Row.
Using an Expanded widget makes a child of a Row, Column, or Flex expand to fill the available space in the main axis (e.g., horizontally for a Row or vertically for a Column). https://docs.flutter.io/flutter/widgets/Expanded-class.html
Using a Flexible widget gives a child of a Row, Column, or Flex the flexibility to expand to fill the available space in the main axis (e.g., horizontally for a Row or vertically for a Column), but, unlike Expanded, Flexible does not require the child to fill the available space. https://docs.flutter.io/flutter/widgets/Flexible-class.html
If you just want to test a library from the command line, you could do:
cat somelibrary.js mytestfile.js | node
Browsers are getting smarter. Today your browser (depending on the version) might skip the image loading if it can determine it's not useful.
The image has a display:none
style but its size may be read by the script.
Chrome v68.0 does not load images if the parent is hidden.
You may check it there : http://jsfiddle.net/tnk3j08s/
You could also have checked it by looking at the "network" tab of your browser's developer tools.
Note that if the browser is on a small CPU computer, not having to render the image (and layout the page) will make the whole rendering operation faster but I doubt this is something that really makes sense today.
If you want to prevent the image from loading you may simply not add the IMG element to your document (or set the IMG src
attribute to "data:"
or "about:blank"
).
Attach the function to the onchange method of the input type file /onchange="validateimg(this)"/
function validateimg(ctrl) {
var fileUpload = ctrl;
var regex = new RegExp("([a-zA-Z0-9\s_\\.\-:])+(.jpg|.png|.gif)$");
if (regex.test(fileUpload.value.toLowerCase())) {
if (typeof (fileUpload.files) != "undefined") {
var reader = new FileReader();
reader.readAsDataURL(fileUpload.files[0]);
reader.onload = function (e) {
var image = new Image();
image.src = e.target.result;
image.onload = function () {
var height = this.height;
var width = this.width;
if (height < 1100 || width < 750) {
alert("At least you can upload a 1100*750 photo size.");
return false;
}else{
alert("Uploaded image has valid Height and Width.");
return true;
}
};
}
} else {
alert("This browser does not support HTML5.");
return false;
}
} else {
alert("Please select a valid Image file.");
return false;
}
}
I dont know about XamGrid
but that's what i'll do with a standard wpf DataGrid
:
<DataGrid>
<DataGrid.Columns>
<DataGridTemplateColumn>
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding DataContext.MyProperty, RelativeSource={RelativeSource AncestorType=MyUserControl}}"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
<DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<TextBox Text="{Binding DataContext.MyProperty, RelativeSource={RelativeSource AncestorType=MyUserControl}}"/>
</DataTemplate>
</DataGridTemplateColumn.CellEditingTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
Since the TextBlock
and the TextBox
specified in the cell templates will be part of the visual tree, you can walk up and find whatever control you need.
I got it
Cells(1, 1).Value = StartDate
Cells(1, 1).NumberFormat = "dd/mm/yyyy"
Basically, I need to set the cell format, instead of setting the date.
You can use the Feed Dialog via URL to emulate the behavior of Sharer.php, but it's a little more complicated. You need a Facebook App setup with the Base URL of the URL you plan to share configured. Then you can do the following:
1) Create a link like:
http://www.facebook.com/dialog/feed?app_id=[FACEBOOK_APP_ID]' +
'&link=[FULLY_QUALIFIED_LINK_TO_SHARE_CONTENT]' +
'&picture=[LINK_TO_IMAGE]' +
'&name=' + encodeURIComponent('[CONTENT_TITLE]') +
'&caption=' + encodeURIComponent('[CONTENT_CAPTION]) +
'&description=' + encodeURIComponent('[CONTENT_DESCRIPTION]') +
'&redirect_uri=' + FBVars.baseURL + '[URL_TO_REDIRECT_TO_AFTER_SHARE]' +
'&display=popup';
(obviously replace the [CONTENT] with the appropriate content. Documentation here: https://developers.facebook.com/docs/reference/dialogs/feed)
2) Open that link in a popup window with JavaScript on click of the share link
3) I like to create file (i.e. popupclose.html) to redirect users back to when they finish sharing, this file will contain <script>window.close();</script>
to close the popup window
The only downside of using the Feed Dialog (besides setup) is that, if you manage Pages as well, you don't have the ability to choose to share via a Page, only a regular user account can share. And it can give you some really cryptic error messages, most of them are related to the setup of your Facebook app or problems with either the content or URL you are sharing.
Scott's answer will work for classes of checkboxes. If you want individual checkboxes, you have to be a little sneakier. If you're just doing one box, it's better to do it with IDs. This example does it by specific check boxes and doesn't require jQuery. It's also a nice little example of how you can get those pesky control IDs into your Javascript.
The .ascx:
<script type="text/javascript">
function checkAgreement(source, args)
{
var elem = document.getElementById('<%= chkAgree.ClientID %>');
if (elem.checked)
{
args.IsValid = true;
}
else
{
args.IsValid = false;
}
}
function checkAge(source, args)
{
var elem = document.getElementById('<%= chkAge.ClientID %>');
if (elem.checked)
{
args.IsValid = true;
}
else
{
args.IsValid = false;
}
}
</script>
<asp:CheckBox ID="chkAgree" runat="server" />
<asp:Label AssociatedControlID="chkAgree" runat="server">I agree to the</asp:Label>
<asp:HyperLink ID="lnkTerms" runat="server">Terms & Conditions</asp:HyperLink>
<asp:Label AssociatedControlID="chkAgree" runat="server">.</asp:Label>
<br />
<asp:CustomValidator ID="chkAgreeValidator" runat="server" Display="Dynamic"
ClientValidationFunction="checkAgreement">
You must agree to the terms and conditions.
</asp:CustomValidator>
<asp:CheckBox ID="chkAge" runat="server" />
<asp:Label AssociatedControlID="chkAge" runat="server">I certify that I am at least 18 years of age.</asp:Label>
<asp:CustomValidator ID="chkAgeValidator" runat="server" Display="Dynamic"
ClientValidationFunction="checkAge">
You must be 18 years or older to continue.
</asp:CustomValidator>
And the codebehind:
Protected Sub chkAgreeValidator_ServerValidate(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.ServerValidateEventArgs) _
Handles chkAgreeValidator.ServerValidate
e.IsValid = chkAgree.Checked
End Sub
Protected Sub chkAgeValidator_ServerValidate(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.ServerValidateEventArgs) _
Handles chkAgeValidator.ServerValidate
e.IsValid = chkAge.Checked
End Sub
another one:
if(this.checkValidity() == false) {
$(this).addClass('was-validated');
e.preventDefault();
e.stopPropagation();
e.stopImmediatePropagation();
return false;
}
Edit your httpd.conf file as follows:
# nano /etc/httpd/conf/httpd.conf
Add the following lines here:
<Directory "/usr/share/phpmyadmin">
Order allow,deny
Allow from all
</Directory>
Issue the following command:
# service httpd restart
If your problem is not solved then disable your SELinux.
In my case, I was able to find issue with ScriptManager by setting Debug=true in web.config file
Make some invisible HTML tags like <label>, <p>, <input>
etc. and name its id, and the class name is a pattern so that you can retrieve it later.
Let you have two lists maintenance_next[] and maintenance_block_time[] of the same length, and you want to pass these two list's data to javascript using the flask. So you take some invisible label tag and set its tag name is a pattern of list's index and set its class name as value at index.
{% for i in range(maintenance_next|length): %}_x000D_
<label id="maintenance_next_{{i}}" name="{{maintenance_next[i]}}" style="display: none;"></label>_x000D_
<label id="maintenance_block_time_{{i}}" name="{{maintenance_block_time[i]}}" style="display: none;"></label>_x000D_
{% endfor%}
_x000D_
Now you can retrieve the data in javascript using some javascript operation like below -
<script>_x000D_
var total_len = {{ total_len }};_x000D_
_x000D_
for (var i = 0; i < total_len; i++) {_x000D_
var tm1 = document.getElementById("maintenance_next_" + i).getAttribute("name");_x000D_
var tm2 = document.getElementById("maintenance_block_time_" + i).getAttribute("name");_x000D_
_x000D_
//Do what you need to do with tm1 and tm2._x000D_
_x000D_
console.log(tm1);_x000D_
console.log(tm2);_x000D_
}_x000D_
</script>
_x000D_
My site faces same issue too.
Using Facebook debug tool is no help at all. Fetch new data but not IMAGE CACHE.
I forced facebook to clear IMAGE CACHE by add www. into image url. In your case is remove www. and config web server redirect.
add/remove www. in image url should solve the problem
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureWebMvc;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@DataJpaTest
@SpringBootTest
@AutoConfigureWebMvc
public class RepoTest {
@Autowired
private ThingShiftDetailsRepository thingShiftDetailsRepo;
@Test
public void findThingShiftDetails() {
ShiftDetails details = new ShiftDetails();
details.setThingId(1);
thingShiftDetailsRepo.save(details);
ShiftDetails dbDetails = thingShiftDetailsRepo.findByThingId(1);
System.out.println(dbDetails);
}
}
Above annotations worked well for me. I am using spring boot with JPA.
From String.split() API Doc:
Splits this string around matches of the given regular expression. This method works as if by invoking the two-argument split method with the given expression and a limit argument of zero. Trailing empty strings are therefore not included in the resulting array.
Overloaded String.split(regex, int) is more appropriate for your case.
Change maxDate to current date
maxDate: new Date()
It will set current date as maximum value.
By checking other answers, I used object-fit in CSS:
video {
object-fit: fill;
}
From MDN (https://developer.mozilla.org/en-US/docs/Web/CSS/object-fit):
The object-fit CSS property specifies how the contents of a replaced element should be fitted to the box established by its used height and width.
Value: fill
The replaced content is sized to fill the element’s content box: the object’s concrete object size is the element’s used width and height.
You can enter these module class suffixes for any module to better control where it will show or be hidden.
.visible-phone
.visible-tablet
.visible-desktop
.hidden-phone
.hidden-tablet
.hidden-desktop
http://twitter.github.com/bootstrap/scaffolding.html scroll to bottom
With the cursor on the class name declaration I do ALT + Return and my Intellij 14.1.4 offers me a popup with the option to 'Create Test'.
Strings always evaluate to boolean true unless they have a value that's considered "empty" by PHP (taken from the documentation for empty
):
""
(an empty string);"0"
(0 as a string)If you need to set a boolean based on the text value of a string, then you'll need to check for the presence or otherwise of that value.
$test_mode_mail = $string === 'true'? true: false;
EDIT: the above code is intended for clarity of understanding. In actual use the following code may be more appropriate:
$test_mode_mail = ($string === 'true');
or maybe use of the filter_var
function may cover more boolean values:
filter_var($string, FILTER_VALIDATE_BOOLEAN);
filter_var
covers a whole range of values, including the truthy values "true"
, "1"
, "yes"
and "on"
. See here for more details.
Using MP3 Decoder/player/converter Maven Dependency.
import javazoom.jl.decoder.JavaLayerException;
import javazoom.jl.player.Player;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
public class PlayAudio{
public static void main(String[] args) throws FileNotFoundException {
try {
FileInputStream fileInputStream = new FileInputStream("mp.mp3");
Player player = new Player((fileInputStream));
player.play();
System.out.println("Song is playing");
while(true){
System.out.println(player.getPosition());
}
}catch (Exception e){
System.out.println(e);
}
}
}
@William You can use NewRow method of the datatable to get a blank datarow and with the schema as that of the datatable. You can populate this datarow and then add the row to the datatable using .Rows.Add(DataRow)
OR .Rows.InsertAt(DataRow, Position)
. The following is a stub code which you can modify as per your convenience.
//Creating dummy datatable for testing
DataTable dt = new DataTable();
DataColumn dc = new DataColumn("col1", typeof(String));
dt.Columns.Add(dc);
dc = new DataColumn("col2", typeof(String));
dt.Columns.Add(dc);
dc = new DataColumn("col3", typeof(String));
dt.Columns.Add(dc);
dc = new DataColumn("col4", typeof(String));
dt.Columns.Add(dc);
DataRow dr = dt.NewRow();
dr[0] = "coldata1";
dr[1] = "coldata2";
dr[2] = "coldata3";
dr[3] = "coldata4";
dt.Rows.Add(dr);//this will add the row at the end of the datatable
//OR
int yourPosition = 0;
dt.Rows.InsertAt(dr, yourPosition);
Looks like your form is submitting which is the default behaviour, you can stop it with this:
<form action="" method="post" onsubmit="completeAndRedirect();return false;">
Check that doPost()
method of servlet is called from the jsp form and remove conn.commit
.
#1 I use the last one frequently when having buttons on the layout which are not generated (but static obviously).
If you use it in practice and in a business application, pay extra attention here, because when you use source obfuscater like ProGuard, you'll need to mark these methods in your activity as to not be obfuscated.
For archiving some kind of compile-time-security with this approach, have a look at Android Lint (example).
#2 Pros and cons for all methods are almost the same and the lesson should be:
Use what ever is most appropriate or feels most intuitive to you.
If you have to assign the same OnClickListener
to multiple button instances, save it in the class-scope (#1). If you need a simple listener for a Button, make an anonymous implementation:
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// Take action.
}
});
I tend to not implement the OnClickListener
in the activity, this gets a little confusing from time to time (especially when you implement multiple other event-handlers and nobody knows what this
is all doing).
They can also provide a kind of naming collision protection for plugin data. For example, the new Change Data Capture feature in SQL Server 2008 puts the tables it uses in a separate cdc schema. This way, they don't have to worry about a naming conflict between a CDC table and a real table used in the database, and for that matter can deliberately shadow the names of the real tables.
Swift 3
let secondviewController:UIViewController = self.storyboard?.instantiateViewController(withIdentifier: "StoryboardIdOfsecondviewController") as? SecondViewController
self.navigationController?.pushViewController(secondviewController, animated: true)
In your case you can just use strpos()
, or stripos()
for case insensitive search:
if (stripos($text, "world") !== false) {
echo "True";
}
import datetime
import numpy as np
from matplotlib.backends.backend_pdf import PdfPages
import matplotlib.pyplot as plt
# Create the PdfPages object to which we will save the pages:
# The with statement makes sure that the PdfPages object is closed properly at
# the end of the block, even if an Exception occurs.
with PdfPages('multipage_pdf.pdf') as pdf:
plt.figure(figsize=(3, 3))
plt.plot(range(7), [3, 1, 4, 1, 5, 9, 2], 'r-o')
plt.title('Page One')
pdf.savefig() # saves the current figure into a pdf page
plt.close()
plt.rc('text', usetex=True)
plt.figure(figsize=(8, 6))
x = np.arange(0, 5, 0.1)
plt.plot(x, np.sin(x), 'b-')
plt.title('Page Two')
pdf.savefig()
plt.close()
plt.rc('text', usetex=False)
fig = plt.figure(figsize=(4, 5))
plt.plot(x, x*x, 'ko')
plt.title('Page Three')
pdf.savefig(fig) # or you can pass a Figure object to pdf.savefig
plt.close()
# We can also set the file's metadata via the PdfPages object:
d = pdf.infodict()
d['Title'] = 'Multipage PDF Example'
d['Author'] = u'Jouni K. Sepp\xe4nen'
d['Subject'] = 'How to create a multipage pdf file and set its metadata'
d['Keywords'] = 'PdfPages multipage keywords author title subject'
d['CreationDate'] = datetime.datetime(2009, 11, 13)
d['ModDate'] = datetime.datetime.today()
I remove the characters '[',']' and do an split with ','
let array = stringObject.replace('[','').replace(']','').split(",").map(String);
Prior to standardization there was ioctl(
...FIONBIO
...)
and fcntl(
...O_NDELAY
...)
, but these behaved inconsistently between systems, and even within the same system. For example, it was common for FIONBIO
to work on sockets and O_NDELAY
to work on ttys, with a lot of inconsistency for things like pipes, fifos, and devices. And if you didn't know what kind of file descriptor you had, you'd have to set both to be sure. But in addition, a non-blocking read with no data available was also indicated inconsistently; depending on the OS and the type of file descriptor the read may return 0, or -1 with errno EAGAIN, or -1 with errno EWOULDBLOCK. Even today, setting FIONBIO
or O_NDELAY
on Solaris causes a read with no data to return 0 on a tty or pipe, or -1 with errno EAGAIN on a socket. However 0 is ambiguous since it is also returned for EOF.
POSIX addressed this with the introduction of O_NONBLOCK
, which has standardized behavior across different systems and file descriptor types. Because existing systems usually want to avoid any changes to behavior which might break backward compatibility, POSIX defined a new flag rather than mandating specific behavior for one of the others. Some systems like Linux treat all 3 the same, and also define EAGAIN and EWOULDBLOCK to the same value, but systems wishing to maintain some other legacy behavior for backward compatibility can do so when the older mechanisms are used.
New programs should use fcntl(
...O_NONBLOCK
...)
, as standardized by POSIX.
you have to add the missing local lang helper: for me the missing ones where de_LU de_LU.UTF-8 . Mongo 2.6.4 worked wihtout mongo 2.6.5 throw an error on this
A spent a lot of time on this issue and finally found that selenium 2.44 not working with node version 0.12. Use node version 0.10.38.
array_search('20120504', array_keys($your_array));
try using the cloning technique.
{
DataGridViewRow row = (DataGridViewRow)yourdatagrid.Rows[0].Clone();
// then for each of the values use a loop like below.
int cc = yourdatagrid.Columns.Count;
for (int i2 = 0; i < cc; i2++)
{
row.Cells[i].Value = yourdatagrid.Rows[0].Cells[i].Value;
}
yourdatagrid.Rows.Add(row);
i++;
}
}
This should work. I'm not sure about how the binding works though. Hopefully it won't prevent this from working.
A normal variable is set by simply assigning it a value; note that no whitespace is allowed around the =
:
HOME=c
An environment variable is a regular variable that has been marked for export to the environment.
export HOME
HOME=c
You can combine the assignment with the export
statement.
export HOME=c
Thanks to marc_s's answer I solved my original problem - inspired to take it a step further and post one approach to transforming a whole table at a time - tsql script to generate the alter column statements:
DECLARE @tableName VARCHAR(MAX)
SET @tableName = 'affiliate'
--EXEC sp_columns @tableName
SELECT 'Alter table ' + @tableName + ' alter column ' + col.name
+ CASE ( col.user_type_id )
WHEN 231
THEN ' nvarchar(' + CAST(col.max_length / 2 AS VARCHAR) + ') '
END + 'collate Latin1_General_CI_AS ' + CASE ( col.is_nullable )
WHEN 0 THEN ' not null'
WHEN 1 THEN ' null'
END
FROM sys.columns col
WHERE object_id = OBJECT_ID(@tableName)
gets: ALTER TABLE Affiliate ALTER COLUMN myTable NVARCHAR(4000) COLLATE Latin1_General_CI_AS NOT NULL
I'll admit to being puzzled by the need to col.max_length / 2 -
Map<Integer, Point2D> hm = new HashMap<Integer, Point2D>();
Let's say you have:
<a></a>
<(.*)>
would match a></a
where as <(.*?)>
would match a
.
The latter stops after the first match of >
. It checks for one
or 0 matches of .*
followed by the next expression.
The first expression <(.*)>
doesn't stop when matching the first >
. It will continue until the last match of >
.
Create a HttpRequestMessage
, set the Method to GET
, set your headers and then use SendAsync
instead of GetAsync
.
var client = new HttpClient();
var request = new HttpRequestMessage() {
RequestUri = new Uri("http://www.someURI.com"),
Method = HttpMethod.Get,
};
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("text/plain"));
var task = client.SendAsync(request)
.ContinueWith((taskwithmsg) =>
{
var response = taskwithmsg.Result;
var jsonTask = response.Content.ReadAsAsync<JsonObject>();
jsonTask.Wait();
var jsonObject = jsonTask.Result;
});
task.Wait();
cordova build android --release
I was able to resolve this, after trying so so many different things, by simply doing :
npm install cordova -g # to upgrade to version 10.0.0
cordova platform rm android
cordova platform add android # to upgrade to android version 9.0.0
var datatable_jquery_script = document.createElement("script");
datatable_jquery_script.src = "vendor/datatables/jquery.dataTables.min.js";
document.body.appendChild(datatable_jquery_script);
setTimeout(function(){
var datatable_bootstrap_script = document.createElement("script");
datatable_bootstrap_script.src = "vendor/datatables/dataTables.bootstrap4.min.js";
document.body.appendChild(datatable_bootstrap_script);
},100);
I used setTimeOut to make sure datatables.min.js loads first. I inspected the waterfall loading of each, bootstrap4.min.js always loads first.
Convert both to lower (only once for performance reasons) and compare them with ternary operator in a single line:
function strcasecmp(s1,s2){
s1=(s1+'').toLowerCase();
s2=(s2+'').toLowerCase();
return s1>s2?1:(s1<s2?-1:0);
}
First you need to export HTTP_PROXY
. Second, you need to read man sudo
carefully, and pay attention to the -E
flag. This works:
$ export HTTP_PROXY=foof
$ sudo -E bash -c 'echo $HTTP_PROXY'
Here is the quote from the man page:
-E, --preserve-env
Indicates to the security policy that the user wishes to preserve their
existing environment variables. The security policy may return an error
if the user does not have permission to preserve the environment.
Create a Batch file (.bat) in Windows with the following command in it:
%ANDROID_HOME%\tools\bin\sdkmanager.bat --list && pause
NOTE: Using && pause
is necessary to be able to review the information, once it is listed. If not used, the batch file will simply run, show the information in just mere few seconds and exit right away.
You can use functools.partial
for this (as you suspected):
from functools import partial
def target(lock, iterable_item):
for item in iterable_item:
# Do cool stuff
if (... some condition here ...):
lock.acquire()
# Write to stdout or logfile, etc.
lock.release()
def main():
iterable = [1, 2, 3, 4, 5]
pool = multiprocessing.Pool()
l = multiprocessing.Lock()
func = partial(target, l)
pool.map(func, iterable)
pool.close()
pool.join()
Example:
def f(a, b, c):
print("{} {} {}".format(a, b, c))
def main():
iterable = [1, 2, 3, 4, 5]
pool = multiprocessing.Pool()
a = "hi"
b = "there"
func = partial(f, a, b)
pool.map(func, iterable)
pool.close()
pool.join()
if __name__ == "__main__":
main()
Output:
hi there 1
hi there 2
hi there 3
hi there 4
hi there 5
From http://www.dotnetperls.com:
7z a secure.7z * -pSECRET
Where:
7z : name and path of 7-Zip executable
a : add to archive
secure.7z : name of destination archive
* : add all files from current directory to destination archive
-pSECRET : specify the password "SECRET"
To open :
7z x secure.7z
Then provide the SECRET password
Note: If the password contains spaces or special characters, then enclose it with single quotes
7z a secure.7z * -p"pa$$word @|"
unnest2()
as exerciseOlder versions before pg v8.4 need a user-defined unnest()
. We can adapt this old function to return elements with an index:
CREATE FUNCTION unnest2(anyarray)
RETURNS setof record AS
$BODY$
SELECT $1[i], i
FROM generate_series(array_lower($1,1),
array_upper($1,1)) i;
$BODY$ LANGUAGE sql IMMUTABLE;
Look at the API from hostip.info - it provides lots of information.
Example in PHP:
$data = file_get_contents("http://api.hostip.info/country.php?ip=12.215.42.19");
//$data contains: "US"
$data = file_get_contents("http://api.hostip.info/?ip=12.215.42.19");
//$data contains: XML with country, lat, long, city, etc...
If you trust hostip.info, it seems to be a very useful API.
You can do that, or you can use the readfile
function, which outputs it for you:
header('Content-Type: image/x-png'); //or whatever
readfile('thefile.png');
die();
Edit: Derp, fixed obvious glaring typo.
JSX:
<select value={ this.state.foo } onChange={this.handleFooChange}>
<option value="A">A</option>
<option value="B">B</option>
</select>
TypeScript:
private handleFooChange = (event: React.FormEvent<HTMLSelectElement>) => {
const element = event.target as HTMLSelectElement;
this.setState({ foo: element.value });
}
#include<algorithm>
#include<vector>
#include<iostream>
using namespace std;
int main()
{
vector<int>v1;
for(int i=0; i<5; i++)
v1.push_back(i*2);
for(int i=0; i<v1.size(); i++)
cout<<v1[i]; //02468
reverse(v1.begin(),v1.end());
for(int i=0; i<v1.size(); i++)
cout<<v1[i]; //86420
}
So this isn't my answer but I just found this while searching around online for a question like this as well. This guy set up a procedure to calculate hours, minutes and seconds. The link and the code:
--Creating Function
If OBJECT_ID('UFN_HourMinuteSecond') Is Not Null
Drop Function dbo.UFN_HourMinuteSecond
Go
Exec(
'Create Function dbo.UFN_HourMinuteSecond
(
@StartDateTime DateTime,
@EndDateTime DateTime
) Returns Varchar(10)
As
Begin
Declare @Seconds Int,
@Minute Int,
@Hour Int,
@Elapsed Varchar(10)
Select @Seconds = ABS(DateDiff(SECOND ,@StartDateTime,@EndDateTime))
If @Seconds >= 60
Begin
select @Minute = @Seconds/60
select @Seconds = @Seconds%60
If @Minute >= 60
begin
select @hour = @Minute/60
select @Minute = @Minute%60
end
Else
Goto Final
End
Final:
Select @Hour = Isnull(@Hour,0), @Minute = IsNull(@Minute,0), @Seconds = IsNull(@Seconds,0)
select @Elapsed = Cast(@Hour as Varchar) + '':'' + Cast(@Minute as Varchar) + '':'' + Cast(@Seconds as Varchar)
Return (@Elapsed)
End'
)
When background-image: none !important;
have no effect.
You can use:
background-size: 0 !important;
The accepted answer works great, but the resize logic ignores the case in which the image is larger than the maximum in only one of the axes (for example, height > maxHeight but width <= maxWidth).
I think the following code takes care of all cases in a more straight-forward and functional way (ignore the typescript type annotations if using plain javascript):
private scaleDownSize(width: number, height: number, maxWidth: number, maxHeight: number): {width: number, height: number} {
if (width <= maxWidth && height <= maxHeight)
return { width, height };
else if (width / maxWidth > height / maxHeight)
return { width: maxWidth, height: height * maxWidth / width};
else
return { width: width * maxHeight / height, height: maxHeight };
}
You could do it like that:
File folder = new File("your/path");
File[] listOfFiles = folder.listFiles();
for (int i = 0; i < listOfFiles.length; i++) {
if (listOfFiles[i].isFile()) {
System.out.println("File " + listOfFiles[i].getName());
} else if (listOfFiles[i].isDirectory()) {
System.out.println("Directory " + listOfFiles[i].getName());
}
}
Do you want to only get JPEG files or all files?
First, convert the timespan to a string, then to DateTime, then back to a string:
Convert.ToDateTime(timespan.SelectedTime.ToString()).ToShortTimeString();
From the PHP Manual:
Warning This extension was deprecated in PHP 5.5.0, and it was removed in PHP 7.0.0. Instead, the MySQLi or PDO_MySQL extension should be used. See also MySQL: choosing an API guide. Alternatives to this function include:
mysqli_connect()
PDO::__construct()
use MySQLi
or PDO
<?php
$con = mysqli_connect('localhost', 'username', 'password', 'database');
Be sure to fully qualify your sheets with which workbook they are referencing!
mainWB.Sheets.Add(After:=mainWB.Sheets(mainWB.Sheets.Count)).Name = new_sheet_name
With itertools
you will obtain another generator object so in most of the cases you will need another step the take the first N elements (N
). There are at least two simpler solutions (a little bit less efficient in terms of performance but very handy) to get the elements ready to use from a generator
:
Using list comprehension:
first_N_element=[generator.next() for i in range(N)]
Otherwise:
first_N_element=list(generator)[:N]
Where N
is the number of elements you want to take (e.g. N=5 for the first five elements).
You can use this function to get the absolute value:
+(NSNumber *)absoluteValue:(NSNumber *)input {
return [NSNumber numberWithDouble:fabs([input doubleValue])];
}
Contrary to what cularis said there can be both in the parameter map.
The best way I see is to proxy the parameterMap and for each parameter retrieval check if queryString contains "&?<parameterName>=".
Note that parameterName needs to be URL encoded before this check can be made, as Qerub pointed out.
That saves you the parsing and still gives you only URL parameters.
This related question's answer provided the solution for me... it was just a dumb mistake:
Remember to commit first!
https://stackoverflow.com/a/7572252
If you have not yet committed to your local repo, there is nothing to push, but the Git error message you get back doesn't help you too much.
This syntax has changed with the newer Apache HTTPd server, please see upgrade to apache 2.4 doc for full details.
2.2 configuration syntax was
Order deny,allow
Deny from all
2.4 configuration now is
Require all denied
Thus, this 2.2 syntax
order deny,allow
deny from all
allow from 127.0.0.1
Would ne now written
Require local
A simpler way to get the machine name without the \InstanceName is:
SELECT SERVERPROPERTY('MachineName')
Since we're offering alternatives to what you asked..
If you're in .Net, you should look at the Database Publishing Wizard in Visual Studio. Easy way to script your tables/data to a text file.
http://www.codeplex.com/sqlhost/Wiki/View.aspx?title=Database%20Publishing%20Wizard
I faced a similar problem , here's the solution.
Step 1 : Double click on the server listed in Eclipse. Here It will display Server Configuration.
Step 2 : Just change the port Number like from 8080 to 8085.
Step 3 : Save the changes.
Step 4 : re-start your server.
The server will start .Hope it'll help you.
You should write the pickled data with a lower protocol number in Python 3. Python 3 introduced a new protocol with the number 3
(and uses it as default), so switch back to a value of 2
which can be read by Python 2.
Check the protocol
parameter in pickle.dump
. Your resulting code will look like this.
pickle.dump(your_object, your_file, protocol=2)
There is no protocol
parameter in pickle.load
because pickle
can determine the protocol from the file.
For a set that small is generally not worth it to convert from an Array to a HashMap/set. In fact, you're probably best off keeping them in an array and then sorting them by key and iterating over both lists simultaneously to do the comparison.
On top of dhobbs answer above (https://stackoverflow.com/a/9728478/624597), here is an extra functionality of storing results to a file (I personally use it to copy and paste to FreeMind to have a nice overview of the structure, therefore I used tabs instead of spaces for indentation):
import os
def list_files(startpath):
with open("folder_structure.txt", "w") as f_output:
for root, dirs, files in os.walk(startpath):
level = root.replace(startpath, '').count(os.sep)
indent = '\t' * 1 * (level)
output_string = '{}{}/'.format(indent, os.path.basename(root))
print(output_string)
f_output.write(output_string + '\n')
subindent = '\t' * 1 * (level + 1)
for f in files:
output_string = '{}{}'.format(subindent, f)
print(output_string)
f_output.write(output_string + '\n')
list_files(".")
An addition to the solution by @Rafael Teles. The syntactic sugar Collectors.mapping
does the same in one step:
//...
List<Employee> employees = persons.stream()
.filter(p -> p.getLastName().equals("l1"))
.collect(
Collectors.mapping(
p -> new Employee(p.getName(), p.getLastName(), 1000),
Collectors.toList()));
Detailed example can be found here
Use border-collapse and border-spacing to get spaces between the table cells. I would not recommend using floating cells as suggested by QQping.
You need to either provide the absolute path to data.csv, or run your script in the same directory as data.csv.
JObject
defines method Parse
for this:
JObject json = JObject.Parse(str);
You might want to refer to Json.NET documentation.
You can use ClosedXML for this.
Store your table in a DataTable and you can export the table to excel by this simple snippet:
XLWorkbook workbook = new XLWorkbook();
DataTable table = GetYourTable();
workbook.Worksheets.Add(table );
You can read the documentation of ClosedXML to learn more. Hope this helps!
This does the trick, without the need to add an inline style
<div class="row-fluid">
<div class="span6">
<p>text left</p>
</div>
<div class="span6">
<div class="pull-right">
<p>text right</p>
</div>
</div>
</div>
The answer is in nesting another <div>
with the "pull-right" class. Combining the two classes won't work.
In a regular expression, you can "capture" parts of the matched string with (brackets)
; in this case, you are capturing the (^|_)
and ([a-z])
parts of the match. These are numbered starting at 1, so you have back-references 1 and 2. Match 0 is the whole matched string.
The /e
modifier takes a replacement string, and substitutes backslash followed by a number (e.g. \1
) with the appropriate back-reference - but because you're inside a string, you need to escape the backslash, so you get '\\1'
. It then (effectively) runs eval
to run the resulting string as though it was PHP code (which is why it's being deprecated, because it's easy to use eval
in an insecure way).
The preg_replace_callback
function instead takes a callback function and passes it an array containing the matched back-references. So where you would have written '\\1'
, you instead access element 1 of that parameter - e.g. if you have an anonymous function of the form function($matches) { ... }
, the first back-reference is $matches[1]
inside that function.
So a /e
argument of
'do_stuff(\\1) . "and" . do_stuff(\\2)'
could become a callback of
function($m) { return do_stuff($m[1]) . "and" . do_stuff($m[2]); }
Or in your case
'strtoupper("\\2")'
could become
function($m) { return strtoupper($m[2]); }
Note that $m
and $matches
are not magic names, they're just the parameter name I gave when declaring my callback functions. Also, you don't have to pass an anonymous function, it could be a function name as a string, or something of the form array($object, $method)
, as with any callback in PHP, e.g.
function stuffy_callback($things) {
return do_stuff($things[1]) . "and" . do_stuff($things[2]);
}
$foo = preg_replace_callback('/([a-z]+) and ([a-z]+)/', 'stuffy_callback', 'fish and chips');
As with any function, you can't access variables outside your callback (from the surrounding scope) by default. When using an anonymous function, you can use the use
keyword to import the variables you need to access, as discussed in the PHP manual. e.g. if the old argument was
'do_stuff(\\1, $foo)'
then the new callback might look like
function($m) use ($foo) { return do_stuff($m[1], $foo); }
preg_replace_callback
is instead of the /e
modifier on the regex, so you need to remove that flag from your "pattern" argument. So a pattern like /blah(.*)blah/mei
would become /blah(.*)blah/mi
./e
modifier used a variant of addslashes()
internally on the arguments, so some replacements used stripslashes()
to remove it; in most cases, you probably want to remove the call to stripslashes
from your new callback.You can disable it with -Wno-reorder
.
The reason is, spring boot comes with logback as its default log configuration whereas camel uses log4j. Thats the reason of conflict. You have two options, either remove logback from spring boot as mentioned in above answers or remove log4j from camel.
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-spring-boot-starter</artifactId>
<version>${camel.version}</version>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
</exclusions>
</dependency>
A simple and clean way: use np.argwhere
to group the indices by element, rather than dimension as in np.nonzero(a)
(i.e., np.argwhere
returns a row for each non-zero element).
>>> a = np.arange(10)
>>> a
array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])
>>> np.argwhere(a>4)
array([[5],
[6],
[7],
[8],
[9]])
np.argwhere(a)
is the same as np.transpose(np.nonzero(a))
.
Note: You cannot use a(np.argwhere(a>4))
to get the corresponding values in a
. The recommended way is to use a[(a>4).astype(bool)]
or a[(a>4) != 0]
rather than a[np.nonzero(a>4)]
as they handle 0-d arrays correctly. See the documentation for more details. As can be seen in the following example, a[(a>4).astype(bool)]
and a[(a>4) != 0]
can be simplified to a[a>4]
.
Another example:
>>> a = np.array([5,-15,-8,-5,10])
>>> a
array([ 5, -15, -8, -5, 10])
>>> a > 4
array([ True, False, False, False, True])
>>> a[a > 4]
array([ 5, 10])
>>> a = np.add.outer(a,a)
>>> a
array([[ 10, -10, -3, 0, 15],
[-10, -30, -23, -20, -5],
[ -3, -23, -16, -13, 2],
[ 0, -20, -13, -10, 5],
[ 15, -5, 2, 5, 20]])
>>> a = np.argwhere(a>4)
>>> a
array([[0, 0],
[0, 4],
[3, 4],
[4, 0],
[4, 3],
[4, 4]])
>>> [print(i,j) for i,j in a]
0 0
0 4
3 4
4 0
4 3
4 4
Just start it with a slash? This means root. As long as you're testing on a web server (e.g. localhost) and not a file system (e.g. C:) then that should be all you need to do.
You can iterate named fields somehow like this:
let jsonObject = {};
for(let field of form.elements) {
if (field.name) {
jsonObject[field.name] = field.value;
}
}
Or, if you need only submiting fields:
function formDataToJSON(form) {
let jsonObject = {};
let formData = new FormData(form);
for(let field of formData) {
jsonObject[field[0]] = field[1];
}
return JSON.stringify(jsonObject);
}
First I think you need to fix your lists, as the first node of a <ul>
must be a <li>
(stackoverflow ref). Once that is setup you can do this:
// note this array has outer scope
var phrases = [];
$('.phrase').each(function(){
// this is inner scope, in reference to the .phrase element
var phrase = '';
$(this).find('li').each(function(){
// cache jquery var
var current = $(this);
// check if our current li has children (sub elements)
// if it does, skip it
// ps, you can work with this by seeing if the first child
// is a UL with blank inside and odd your custom BLANK text
if(current.children().size() > 0) {return true;}
// add current text to our current phrase
phrase += current.text();
});
// now that our current phrase is completely build we add it to our outer array
phrases.push(phrase);
});
// note the comma in the alert shows separate phrases
alert(phrases);
Working jsfiddle.
One thing is if you get the .text()
of an upper level li
you will get all sub level text with it.
Keeping an array will allow for many multiple phrases to be extracted.
EDIT:
This should work better with an empty UL
with no LI
:
// outer scope
var phrases = [];
$('.phrase').each(function(){
// inner scope
var phrase = '';
$(this).find('li').each(function(){
// cache jquery object
var current = $(this);
// check for sub levels
if(current.children().size() > 0) {
// check is sublevel is just empty UL
var emptyULtest = current.children().eq(0);
if(emptyULtest.is('ul') && $.trim(emptyULtest.text())==""){
phrase += ' -BLANK- '; //custom blank text
return true;
} else {
// else it is an actual sublevel with li's
return true;
}
}
// if it gets to here it is actual li
phrase += current.text();
});
phrases.push(phrase);
});
// note the comma to separate multiple phrases
alert(phrases);
$("#selectsearch").change(function() {
var action = $(this).val() == "people" ? "user" : "content";
$("#search-form").attr("action", "/search/" + action);
});
Ancient topic, if someone still stumbles over this--another workaround is to convert via .astype(str) to string before grouping. That will conserve the NaN's.
df = pd.DataFrame({'a': ['1', '2', '3'], 'b': ['4', np.NaN, '6']})
df['b'] = df['b'].astype(str)
df.groupby(['b']).sum()
a
b
4 1
6 3
nan 2
I had the same problem but it only occurred on the published website on Godaddy. It was no problem in my local host.
The error came from an aspx.cs (code behind file) where I tried to assign a value to a label. It appeared that from within the code behind, that the label Text appears to be null. So all I did with change all my Label Text properties in the ASPX file from Text="" to Text=" ".
The problem disappeared. I don’t know why the error happens from the hosted version but not on my localhost and don’t have time to figure out why. But it works fine now.
As you said, you want hash to contain only numbers.
var reg = new RegExp('^[0-9]+$');
or
var reg = new RegExp('^\\d+$');
\d
and [0-9]
both mean the same thing.
The + used means that search for one or more occurring of [0-9].
Double is a wrapper class,
The Double class wraps a value of the primitive type double in an object. An object of type Double contains a single field whose type is double.
In addition, this class provides several methods for converting a double to a String and a String to a double, as well as other constants and methods useful when dealing with a double.
The double data type,
The double data type is a double-precision 64-bit IEEE 754 floating point. Its range of values is 4.94065645841246544e-324d to 1.79769313486231570e+308d (positive or negative). For decimal values, this data type is generally the default choice. As mentioned above, this data type should never be used for precise values, such as currency.
Check each datatype with their ranges : Java's Primitive Data Types.
Important Note : If you'r thinking to use double for precise values, you need to re-think before using it. Java Traps: double
Assuming your code is inside an MVC controller:
public class MyController : Microsoft.AspNetCore.Mvc.Controller
From the Controller
base class, you can get the IClaimsPrincipal
from the User
property
System.Security.Claims.ClaimsPrincipal currentUser = this.User;
You can check the claims directly (without a round trip to the database):
bool IsAdmin = currentUser.IsInRole("Admin");
var id = _userManager.GetUserId(User); // Get user id:
Other fields can be fetched from the database's User entity:
Get the user manager using dependency injection
private UserManager<ApplicationUser> _userManager;
//class constructor
public MyController(UserManager<ApplicationUser> userManager)
{
_userManager = userManager;
}
And use it:
var user = await _userManager.GetUserAsync(User);
var email = user.Email;
Here you go:
DECLARE
BEGIN
dbms_output.enable(NULL); -- Disables the limit of DBMS
-- Your print here !
END;