If the process is a child process and $BASHPID is not set, it is possible to query the ppid of a created child process of the running process. It might be a bit ugly, but it works. Example:
sleep 1 &
mypid=$(ps -o ppid= -p "$!")
use grep [n]ame to remove that grep -v name this is first... Sec using xargs in the way how it is up there is wrong to rnu whatever it is piped you have to use -i ( interactive mode) otherwise you may have issues with the command.
ps axf | grep | grep -v grep | awk '{print "kill -9 " $1}' ? ps aux |grep [n]ame | awk '{print "kill -9 " $2}' ? isnt that better ?
You can use the pgrep command like in the following example
$ pgrep Keychain\ Access
44186
The answers involving sending 'signal 0' to the process will work only if the process in question is owned by the user running the test. Otherwise you will get an OSError
due to permissions, even if the pid exists in the system.
In order to bypass this limitation you can check if /proc/<pid>
exists:
import os
def is_running(pid):
if os.path.isdir('/proc/{}'.format(pid)):
return True
return False
This applies to linux based systems only, obviously.
ps
command with -p $PID
can do this:
$ ps -p 3531
PID TTY TIME CMD
3531 ? 00:03:07 emacs
After doing setup of PHPMyAdmin, I was also facing the same problem,
Here's a backdoor method which might not work with all VMs but should work on both linux and windows (original example here):
java.lang.management.RuntimeMXBean runtime =
java.lang.management.ManagementFactory.getRuntimeMXBean();
java.lang.reflect.Field jvm = runtime.getClass().getDeclaredField("jvm");
jvm.setAccessible(true);
sun.management.VMManagement mgmt =
(sun.management.VMManagement) jvm.get(runtime);
java.lang.reflect.Method pid_method =
mgmt.getClass().getDeclaredMethod("getProcessId");
pid_method.setAccessible(true);
int pid = (Integer) pid_method.invoke(mgmt);
$$
is an alias in Bash to the current script PID. See differences between $$
and $BASHPID
here, and right above that the additional variable $BASH_SUBSHELL
which contains the nesting level.Since sockstat wasn't natively installed on my machine I hacked up stanwise's answer to use netstat instead..
netstat -nlp | grep -E "[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\:2000" | awk '{print $7}' | sed -e "s/\/.*//g""
I think I have found out a solution, that looks quite bulletproof while working on most platforms. Here is the idea:
Since you check only for child processes, you cannot be wronged by some other process in the same machine. JVM-wide mutex than allows you to be sure, that the new process is the correct one.
Reading child process list is simpler than getting PID from process objects, because it does not require WIN API calls on windows, and, more importantly, it has been done already in several libs.
Below is an implementation of the above idea using JavaSysMon library. It
class UDKSpawner {
private int uccPid;
private Logger uccLog;
/**
* Mutex that forces only one child process to be spawned at a time.
*
*/
private static final Object spawnProcessMutex = new Object();
/**
* Spawns a new UDK process and sets {@link #uccPid} to it's PID. To work correctly,
* the code relies on the fact that no other method in this JVM runs UDK processes and
* that no method kills a process unless it acquires lock on spawnProcessMutex.
* @param procBuilder
* @return
*/
private Process spawnUDK(ProcessBuilder procBuilder) throws IOException {
synchronized (spawnProcessMutex){
JavaSysMon monitor = new JavaSysMon();
DirectUDKChildProcessVisitor beforeVisitor = new DirectUDKChildProcessVisitor();
monitor.visitProcessTree(monitor.currentPid(), beforeVisitor);
Set<Integer> alreadySpawnedProcesses = beforeVisitor.getUdkPids();
Process proc = procBuilder.start();
DirectUDKChildProcessVisitor afterVisitor = new DirectUDKChildProcessVisitor();
monitor.visitProcessTree(monitor.currentPid(), afterVisitor);
Set<Integer> newProcesses = afterVisitor.getUdkPids();
newProcesses.removeAll(alreadySpawnedProcesses);
if(newProcesses.isEmpty()){
uccLog.severe("There is no new UKD PID.");
}
else if(newProcesses.size() > 1){
uccLog.severe("Multiple new candidate UDK PIDs");
} else {
uccPid = newProcesses.iterator().next();
}
return proc;
}
}
private void killUDKByPID(){
if(uccPid < 0){
uccLog.severe("Cannot kill UCC by PID. PID not set.");
return;
}
synchronized(spawnProcessMutex){
JavaSysMon monitor = new JavaSysMon();
monitor.killProcessTree(uccPid, false);
}
}
private static class DirectUDKChildProcessVisitor implements ProcessVisitor {
Set<Integer> udkPids = new HashSet<Integer>();
@Override
public boolean visit(OsProcess op, int i) {
if(op.processInfo().getName().equals("UDK.exe")){
udkPids.add(op.processInfo().getPid());
}
return false;
}
public Set<Integer> getUdkPids() {
return udkPids;
}
}
}
Pidfile contains pid of a process. It is a convention allowing long running processes to be more self-aware. Server process can inspect it to stop itself, or have heuristic that its other instance is already running. Pidfiles can also be used to conventiently kill risk manually, e.g. pkill -F <some.pid>
Try netstat -b, that may hopefully shed some light on the situation (showing what .exe is using the port). Good luck.
You need to save the PID of the background process at the time you start it:
foo &
FOO_PID=$!
# do other stuff
kill $FOO_PID
You cannot use job control, since that is an interactive feature and tied to a controlling terminal. A script will not necessarily have a terminal attached at all so job control will not necessarily be available.
If the script is the same across all users, you can use a lockfile
approach. If you acquire the lock, proceed else show a message and exit.
As an example:
[Terminal #1] $ lockfile -r 0 /tmp/the.lock
[Terminal #1] $
[Terminal #2] $ lockfile -r 0 /tmp/the.lock
[Terminal #2] lockfile: Sorry, giving up on "/tmp/the.lock"
[Terminal #1] $ rm -f /tmp/the.lock
[Terminal #1] $
[Terminal #2] $ lockfile -r 0 /tmp/the.lock
[Terminal #2] $
After /tmp/the.lock
has been acquired your script will be the only one with access to execution. When you are done, just remove the lock. In script form this might look like:
#!/bin/bash
lockfile -r 0 /tmp/the.lock || exit 1
# Do stuff here
rm -f /tmp/the.lock
Since Python 3.5, subprocess.run() is recommended over subprocess.check_output():
>>> int(subprocess.run(["pidof", "-s", "your_process"], stdout=subprocess.PIPE).stdout)
Also, since Python 3.7, you can use the capture_output=true
parameter to capture stdout and stderr:
>>> int(subprocess.run(["pidof", "-s", "your process"], capture_output=True).stdout)
AFAIK, there is no way to do this reliably, unless you switch to an array. Which honestly, doesn't seem strange - it's seems pretty straight forward to me that arrays are countable, and objects aren't.
Probably the closest you'll get is something like this
// Monkey patching on purpose to make a point
Object.prototype.length = function()
{
var i = 0;
for ( var p in this ) i++;
return i;
}
alert( {foo:"bar", bar: "baz"}.length() ); // alerts 3
But this creates problems, or at least questions. All user-created properties are counted, including the _length function itself! And while in this simple example you could avoid it by just using a normal function, that doesn't mean you can stop other scripts from doing this. so what do you do? Ignore function properties?
Object.prototype.length = function()
{
var i = 0;
for ( var p in this )
{
if ( 'function' == typeof this[p] ) continue;
i++;
}
return i;
}
alert( {foo:"bar", bar: "baz"}.length() ); // alerts 2
In the end, I think you should probably ditch the idea of making your objects countable and figure out another way to do whatever it is you're doing.
A better solution is explained in the official explanation. I left the answer I have given before under the horizontal line.
According to the solution there:
Use an external tag and write down the following code below in the top-level build.gradle file. You're going to change the version to a variable rather than a static version number.
ext {
compileSdkVersion = 26
supportLibVersion = "27.1.1"
}
Change the static version numbers in your app-level build.gradle file, the one has (Module: app)
near.
android {
compileSdkVersion rootProject.ext.compileSdkVersion // It was 26 for example
// the below lines will stay
}
// here there are some other stuff maybe
dependencies {
implementation "com.android.support:appcompat-v7:${rootProject.ext.supportLibVersion}"
// the below lines will stay
}
Sync your project and you'll get no errors.
You don't need to add anything to Gradle scripts. Install the necessary SDKs and the problem will be solved.
In your case, install the libraries below from Preferences > Android SDK or Tools > Android > SDK Manager
Bootstrap offers various table styles. Have a look at Base CSS - Tables for documentation and examples.
The following style gives great looking tables:
<table class="table table-striped table-bordered table-condensed">
...
</table>
<div class="modal fade bs-example-modal-lg" id="{{'modal'+ cartModal.index}}">
<div class="modal-dialog modal-lg" role="document">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
</div>
<div class="modal-body">
<div class="col-lg-6" >
<p class="prodTitle" ng-bind="(cartModal.product.p_name|uppercase)"></p>
<p class="price-para">
<span class="currency-cls" ng-bind="cartModal.product.c_currency"></span>
<span class="price-cls" ng-bind="cartModal.product.p_price"></span>
</p>
<p class="select-color">
<span ng-repeat="color in cartModal.product.p_available_options.colors">
<button id="color-style" ng-click="cartModal.saveColor(color)" ng-style="{'background-color':color.hexcode}"></button>
</span>
</p>
<br>
<p class="select-box">
<span class="size-select-cls">
SIZE:<select ng-init="items=cartModal.product.p_available_options.sizes" ng-model="cartModal.selectedSize" ng-options="item.code as
item.name for item in items"></select>
</span>
<span class="qty">
QTY:<input type="number" min="1" ng-model="cartModal.selectedQty"/>
</span>
</p>
<p class="edit-button">
<button class="btn-primary btn-lg" data-dismiss="modal" ng-click="cartModal.save();cartModal.calculate()">EDIT</button>
</p>
</div>
<div class="col-lg-6">
<img ng-src="{{cartModal.product.imageSrc}}">
</div>
</div>
</div>
</div>
</div>
You should export an array like this:
const path = require('path');
const webpack = require('webpack');
const libName = 'YourLibraryName';
function getConfig(env) {
const config = {
mode: env,
output: {
path: path.resolve('dist'),
library: libName,
libraryTarget: 'umd',
filename: env === 'production' ? `${libName}.min.js` : `${libName}.js`
},
target: 'web',
.... your shared options ...
};
return config;
}
module.exports = [
getConfig('development'),
getConfig('production'),
];
Assumes a unix-like system on Python 2 you can do:
import os
def tail(f, n, offset=0):
stdin,stdout = os.popen2("tail -n "+n+offset+" "+f)
stdin.close()
lines = stdout.readlines(); stdout.close()
return lines[:,-offset]
For python 3 you may do:
import subprocess
def tail(f, n, offset=0):
proc = subprocess.Popen(['tail', '-n', n + offset, f], stdout=subprocess.PIPE)
lines = proc.stdout.readlines()
return lines[:, -offset]
Disclaimer: Avoid !important at all cost.
This is a dirty, dirty hack, but you can override an !important, without an !important, by using an (infinitely looping or very long lasting) animation on the property you're trying to override the importants on.
@keyframes forceYellow {_x000D_
from {_x000D_
background-color: yellow;_x000D_
}_x000D_
to {_x000D_
background-color: yellow;_x000D_
}_x000D_
}_x000D_
_x000D_
div {_x000D_
width: 100px;_x000D_
height: 100px;_x000D_
margin: 0 auto;_x000D_
background: red !important;_x000D_
animation: 1s linear infinite forceYellow;_x000D_
}
_x000D_
<div></div>
_x000D_
SET PASSWORD FOR 'root'@'localhost' = PASSWORD('');
How about instead of using an if inside the event, you unbind the event when the select class is applied? I'm guessing you add the class inside your code somewhere, so unbinding the event there would look like this:
$(element).addClass( 'selected' ).unbind( 'hover' );
The only downside is that if you ever remove the selected class from the element, you have to subscribe it to the hover event again.
Sticking to the method you are using to insert it, use
list[:0] = ['foo']
http://docs.python.org/release/2.6.6/library/stdtypes.html#mutable-sequence-types
What you want is lazy iteration over an object or array. This is not possible in ES5 (thus not possible in node.js). We will get this eventually.
The only solution is finding a node module that extends V8 to implement iterators (and probably generators). I couldn't find any implementation. You can look at the spidermonkey source code and try writing it in C++ as a V8 extension.
You could try the following, however it will also load all the keys into memory
Object.keys(o).forEach(function(key) {
var val = o[key];
logic();
});
However since Object.keys
is a native method it may allow for better optimisation.
As you can see Object.keys is significantly faster. Whether the actual memory storage is more optimum is a different matter.
var async = {};
async.forEach = function(o, cb) {
var counter = 0,
keys = Object.keys(o),
len = keys.length;
var next = function() {
if (counter < len) cb(o[keys[counter++]], next);
};
next();
};
async.forEach(obj, function(val, next) {
// do things
setTimeout(next, 100);
});
This is a bit hacky but cross browser solution which requires no CSS
<div>
<div>h</div>
<div>e</div>
<div>l</div>
<div>l</div>
<div>o</div>
<div>
_x000D_
The examples contained in this blog post do the trick.
As I understand your question..
From Java List class you have to methods add(E e)
and get(int position)
.
add(E e)
Appends the specified element to the end of this list (optional operation).
get(int index)
Returns the element at the specified position in this list.
Example:
List<String> myString = new ArrayList<String>();
// How you add your data in string list
myString.add("Test 1");
myString.add("Test 2");
myString.add("Test 3");
myString.add("Test 4");
// retrieving data from string list array in for loop
for (int i=0;i < myString.size();i++)
{
Log.i("Value of element "+i,myString.get(i));
}
But efficient way to iterate thru loop
for (String value : myString)
{
Log.i("Value of element ",value);
}
this would do it excluding exactly 'Music'
cp -a ^'Music' /target
this and that for excluding things like Music?* or *?Music
cp -a ^\*?'complete' /target
cp -a ^'complete'?\* /target
face same issue, resolved by running Visual Studio in Admin mode
I've been working on some Instagram extension for chrome last few days and I got this to workout:
First, you need to know that this can work if the user profile is public or you are logged in and you are following that user.
I am not sure why does it work like this, but probably some cookies are set when you log in that are checked on the backend while fetching private profiles.
Now I will share with you an ajax example but you can find other ones that suit you better if you are not using jquery.
Also, you can notice that we have two query_hash values for followers and followings and for other queries different ones.
let config = {
followers: {
hash: 'c76146de99bb02f6415203be841dd25a',
path: 'edge_followed_by'
},
followings: {
hash: 'd04b0a864b4b54837c0d870b0e77e076',
path: 'edge_follow'
}
};
The user ID you can get from https://www.instagram.com/user_name/?__a=1
as response.graphql.user.id
After is just response from first part of users that u are getting since the limit is 50 users per request:
let after = response.data.user[list].page_info.end_cursor
let data = {followers: [], followings: []};
function getFollows (user, list = 'followers', after = null) {
$.get(`https://www.instagram.com/graphql/query/?query_hash=${config[list].hash}&variables=${encodeURIComponent(JSON.stringify({
"id": user.id,
"include_reel": true,
"fetch_mutual": true,
"first": 50,
"after": after
}))}`, function (response) {
data[list].push(...response.data.user[config[list].path].edges);
if (response.data.user[config[list].path].page_info.has_next_page) {
setTimeout(function () {
getFollows(user, list, response.data.user[config[list].path].page_info.end_cursor);
}, 1000);
} else if (list === 'followers') {
getFollows(user, 'followings');
} else {
alert('DONE!');
console.log(followers);
console.log(followings);
}
});
}
You could probably use this off instagram website but I did not try, you would probably need some headers to match those from instagram page.
And if you need for those headers some additional data you could maybe find that within window._sharedData
JSON that comes from backend with csrf token etc.
You can catch this by using:
let $script = JSON.parse(document.body.innerHTML.match(/<script type="text\/javascript">window\._sharedData = (.*)<\/script>/)[1].slice(0, -1));
Thats all from me!
Hope it helps you out!
At its simplest, the app.config is an XML file with many predefined configuration sections available and support for custom configuration sections. A "configuration section" is a snippet of XML with a schema meant to store some type of information.
Settings can be configured using built-in configuration sections such as connectionStrings
or appSettings
. You can add your own custom configuration sections; this is an advanced topic, but very powerful for building strongly-typed configuration files.
Web applications typically have a web.config, while Windows GUI/service applications have an app.config file.
Application-level config files inherit settings from global configuration files, e.g. the machine.config.
Connection strings have a predefined schema that you can use. Note that this small snippet is actually a valid app.config (or web.config) file:
<?xml version="1.0"?>
<configuration>
<connectionStrings>
<add name="MyKey"
connectionString="Data Source=localhost;Initial Catalog=ABC;"
providerName="System.Data.SqlClient"/>
</connectionStrings>
</configuration>
Once you have defined your app.config, you can read it in code using the ConfigurationManager class. Don't be intimidated by the verbose MSDN examples; it's actually quite simple.
string connectionString = ConfigurationManager.ConnectionStrings["MyKey"].ConnectionString;
Frequently changing the *.config files is usually not a good idea, but it sounds like you only want to perform one-time setup.
See: Change connection string & reload app.config at run time which describes how to update the connectionStrings
section of the *.config file at runtime.
Note that ideally you would perform such configuration changes from a simple installer.
Q: Suppose I manually change some <value>
in app.config, save it and then close it. Now when I go to my bin folder and launch the .exe file from here, why doesn't it reflect the applied changes?
A: When you compile an application, its app.config is copied to the bin directory1 with a name that matches your exe. For example, if your exe was named "test.exe", there should be a "text.exe.config" in your bin directory. You can change the configuration without a recompile, but you will need to edit the config file that was created at compile time, not the original app.config.
1: Note that web.config files are not moved, but instead stay in the same location at compile and deployment time. One exception to this is when a web.config is transformed.
New configuration options were introduced with .NET Core. The way that *.config files works does not appear to have changed, but developers are free to choose new, more flexible configuration paradigms.
You can purchase InstallShield, the market leader for creating installation packages. It offers many features beyond what you get with freeware solutions.
Warning: InstallShield is insanely expensive!
I have been using SQLite Database Browser to see the content SQLite DB in Android development. You have to pull the database file from the device first, then open it in SQLite DB Browser.
Suppose
a = ['a', 'b', 'c', 3, 4, 'd', 6, 7, 8]
and the list of indexes is stored in
b= [0, 1, 2, 4, 6, 7, 8]
then a simple one-line solution will be
c = [a[i] for i in b]
Also do note when specifying DATETIME
as DATETIME(3)
or like on MySQL 5.7.x, you also have to add the same value for CURRENT_TIMESTAMP(3)
. If not it will keep throwing 'Invalid default value'.
I solve with this:
Startup.cs
public void ConfigureServices(IServiceCollection services)
{
services.AddHttpClient("HttpClientWithSSLUntrusted").ConfigurePrimaryHttpMessageHandler(() => new HttpClientHandler
{
ClientCertificateOptions = ClientCertificateOption.Manual,
ServerCertificateCustomValidationCallback =
(httpRequestMessage, cert, cetChain, policyErrors) =>
{
return true;
}
});
YourService.cs
public UserService(IHttpClientFactory clientFactory, IOptions<AppSettings> appSettings)
{
_appSettings = appSettings.Value;
_clientFactory = clientFactory;
}
var request = new HttpRequestMessage(...
var client = _clientFactory.CreateClient("HttpClientWithSSLUntrusted");
HttpResponseMessage response = await client.SendAsync(request);
There are two steps:
** You can set width by setting fixed Pixels like "150 px" or by percentage like"10%".
to me it was upgrading dependencies of com.google.gms:google-services inside build.gradle to
buildscript {
repositories {
jcenter()
mavenCentral()
maven {
url 'https://maven.google.com/'
name 'Google'
}
google()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.3.2'
classpath 'com.google.gms:google-services:4.2.0'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
With integers, it's preference.
If the loop variable is a class/object, it can make a difference (only profiling can tell you if it's a significant difference), because the post-increment version requires that you create a copy of that object that gets discarded.
If creating that copy is an expensive operation, you're paying that expense once for every time you go through the loop, for no reason at all.
If you get into the habit of always using ++i
in for loops, you don't need to stop and think about whether what you're doing in this particular situation makes sense. You just always are.
If Running In A .Net 4.5.2 Service
For me the issue was compounded because the call was running in a .Net 4.5.2 service. I followed @willmaz suggestion but got a new error.
In running the service with logging turned on, I viewed the handshaking with the target site would initiate ok (and send the bearer token) but on the following step to process the Post call, it would seem to drop the auth token and the site would reply with Unauthorized
.
Solution
It turned out that the service pool credentials did not have rights to change TLS (?) and when I put in my local admin account into the pool, it all worked.
DailyRollingFileAppender is what you exactly searching for.
<appender name="roll" class="org.apache.log4j.DailyRollingFileAppender">
<param name="File" value="application.log" />
<param name="DatePattern" value=".yyyy-MM-dd" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern"
value="%d{yyyy-MMM-dd HH:mm:ss,SSS} [%t] %c %x%n %-5p %m%n"/>
</layout>
</appender>
Install the GitBash
tool in the Windows OS. Set the below Path
in the environment variables of System for the Git installation.
<Program Files in C:\>\Git\bin
<Program Files in C:\>\Git\usr\bin
Type 'sh' in cmd
window to redirect into Bourne shell and run your commands in terminal.
The quickest way is to use a tool, like RazorSQL or Toad for doing this.
When using Bash just try this:
$ export JAVA_HOME=/usr/tomcat/jre
jQuery is a multi-browser (cf. cross-browser) JavaScript library designed to simplify the client-side scripting of HTML. see http://en.wikipedia.org/wiki/JQuery
You could use a variable to make the calculation and use toFixed
when you set the #diskamountUnit
element value:
var amount = $("#disk").slider("value") * 1.60;
$("#diskamountUnit").val('$' + amount.toFixed(2));
You can also do that in one step, in the val
method call but IMO the first way is more readable:
$("#diskamountUnit").val('$' + ($("#disk").slider("value") * 1.60).toFixed(2));
Scripts are raw java embedded in the page code, and if you declare variables in your scripts, then they become local variables embedded in the page.
In contrast, JSTL works entirely with scoped attributes, either at page
, request
or session
scope. You need to rework your scriptlet to fish test
out as an attribute:
<c:set var="test" value="test1"/>
<%
String resp = "abc";
String test = pageContext.getAttribute("test");
resp = resp + test;
pageContext.setAttribute("resp", resp);
%>
<c:out value="${resp}"/>
If you look at the docs for <c:set>
, you'll see you can specify scope
as page
, request
or session
, and it defaults to page
.
Better yet, don't use scriptlets at all: they make the baby jesus cry.
document.ready (jQuery) document.ready will execute right after the HTML document is loaded property, and the DOM is ready.
DOM: The Document Object Model (DOM) is a cross-platform and language-independent convention for representing and interacting with objects in HTML, XHTML and XML documents.
$(document).ready(function()
{
// executes when HTML-Document is loaded and DOM is ready
alert("(document).ready was called - document is ready!");
});
window.load (Built-in JavaScript) The window.load however will wait for the page to be fully loaded, this includes inner frames, images etc. * window.load is a built-in JavaScript method, it is known to have some quirks in old browsers (IE6, IE8, old FF and Opera versions) but will generally work in all of them.
window.load can be used in the body's onload event like this (but I would strongly suggest you avoid mixing code like this in the HTML, as it is a source for confusion later on):
$(window).load(function()
{
// executes when complete page is fully loaded, including all frames, objects and images
alert("(window).load was called - window is loaded!");
});
Using the CSV idea, if it's just a list of Strings. Assuming l
is your list:
using System.IO;
using(StreamWriter sw = File.CreateText("list.csv"))
{
for(int i = 0; i < l.Count; i++)
{
sw.WriteLine(l[i]);
}
}
Only this worked for me:
#container:hover .cube { background-color: yellow; }
Where .cube
is CssClass of the #cube
.
Tested in Firefox, Chrome and Edge.
Wrap it all up in an Async task to avoid threading errors.
public class AsyncHttpPostTask extends AsyncTask<File, Void, String> {
private static final String TAG = AsyncHttpPostTask.class.getSimpleName();
private String server;
public AsyncHttpPostTask(final String server) {
this.server = server;
}
@Override
protected String doInBackground(File... params) {
Log.d(TAG, "doInBackground");
HttpClient http = AndroidHttpClient.newInstance("MyApp");
HttpPost method = new HttpPost(this.server);
method.setEntity(new FileEntity(params[0], "text/plain"));
try {
HttpResponse response = http.execute(method);
BufferedReader rd = new BufferedReader(new InputStreamReader(
response.getEntity().getContent()));
final StringBuilder out = new StringBuilder();
String line;
try {
while ((line = rd.readLine()) != null) {
out.append(line);
}
} catch (Exception e) {}
// wr.close();
try {
rd.close();
} catch (IOException e) {
e.printStackTrace();
}
// final String serverResponse = slurp(is);
Log.d(TAG, "serverResponse: " + out.toString());
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}
Since Java 9 Map
interface contains:
Map.of(k1,v1, k2,v2, ..)
Map.ofEntries(Map.entry(k1,v1), Map.entry(k2,v2), ..)
. Limitations of those factory methods are that they:
null
s as keys and/or values (if you need to store nulls take a look at other answers)If we need mutable map (like HashMap) we can use its copy-constructor and let it copy content of map created via Map.of(..)
Map<Integer, String> map = new HashMap<>( Map.of(1,"a", 2,"b", 3,"c") );
I know this is old, but for those having problems in Edge:
Plain JS: window.scrollTop=0;
Unfortunately, scroll()
and scrollTo()
throw errors in Edge.
.NET Core will install and run on macOS - and just about any other desktop OS.
IDEs are available for the mac, including:
Mono is a good option that I've used in the past. But with Core 3.0 out now, I would go that route.
Except for adding the following to sqlnet.ora
SQLNET.ALLOWED_LOGON_VERSION_CLIENT = 8
SQLNET.ALLOWED_LOGON_VERSION_SERVER = 8
I also added the following to both the Client and Server, which resolved my issue
SQLNET.AUTHENTICATION_SERVICES = (NONE)
Also see post ORA-28040: No matching authentication protocol
Does this work for you?
interface IMessage
{
void Process(object source);
}
class LoginMessage : IMessage
{
public void Process(object source)
{
}
}
abstract class MessageProcessor
{
public abstract void ProcessMessage(object source, object type);
}
class MessageProcessor<T> : MessageProcessor where T: IMessage
{
public override void ProcessMessage(object source, object o)
{
if (!(o is T)) {
throw new NotImplementedException();
}
ProcessMessage(source, (T)o);
}
public void ProcessMessage(object source, T type)
{
type.Process(source);
}
}
class Program
{
static void Main(string[] args)
{
Dictionary<Type, MessageProcessor> messageProcessors = new Dictionary<Type, MessageProcessor>();
messageProcessors.Add(typeof(string), new MessageProcessor<LoginMessage>());
LoginMessage message = new LoginMessage();
Type key = message.GetType();
MessageProcessor processor = messageProcessors[key];
object source = null;
processor.ProcessMessage(source, message);
}
}
This gives you the correct object. The only thing I am not sure about is whether it is enough in your case to have it as an abstract MessageProcessor.
Edit: I added an IMessage interface. The actual processing code should now become part of the different message classes that should all implement this interface.
if ($string =~ m/something/) {
# Do work
}
Where something
is a regular expression.
I found that along with setting the -p port values, Docker for Windows uses vpnkit and inbound traffic for it was disabled by default on my host machine's firewall. After enabling the inbound TCP rules for vpnkit I was able to access my containers from other machines on the local network.
Because the range for floats is greater than that of integers -- returning an integer could overflow
After trying different things. This worked.
Delete your node modules folder and run
npm i
This works in all browsers (IE11, Firefox, Microsoft Edge, Chrome and Chrome Mobile) My documents are in multiple select elements. The browsers seem to have issues when you try to do it too fast... So I used a timeout.
<select class="document">
<option val="word.docx">some word document</option>
</select>
//user clicks a download button to download all selected documents
$('#downloadDocumentsButton').click(function () {
var interval = 1000;
//select elements have class name of "document"
$('.document').each(function (index, element) {
var doc = $(element).val();
if (doc) {
setTimeout(function () {
window.location = doc;
}, interval * (index + 1));
}
});
});
This solution uses promises:
function downloadDocs(docs) {
docs[0].then(function (result) {
if (result.web) {
window.open(result.doc);
}
else {
window.location = result.doc;
}
if (docs.length > 1) {
setTimeout(function () { return downloadDocs(docs.slice(1)); }, 2000);
}
});
}
$('#downloadDocumentsButton').click(function () {
var files = [];
$('.document').each(function (index, element) {
var doc = $(element).val();
var ext = doc.split('.')[doc.split('.').length - 1];
if (doc && $.inArray(ext, docTypes) > -1) {
files.unshift(Promise.resolve({ doc: doc, web: false }));
}
else if (doc && ($.inArray(ext, webTypes) > -1 || ext.includes('?'))) {
files.push(Promise.resolve({ doc: doc, web: true }));
}
});
downloadDocs(files);
});
If you are using bootstrap (I am using version 4.0), feel free to try the following code.
<input data-toggle="tooltip" data-placement="top" title="This is the text of the tooltip" value="44"/>
data-placement
can be top, right, bottom or left
something like this:
f = open('data.txt', 'r')
for line in f:
line = line.split(';')
product = Product()
product.name = line[2] + '(' + line[1] + ')'
product.description = line[4]
product.price = '' #data is missing from file
product.save()
f.close()
reverse_dictionary = {v:k for k,v in dictionary.items()}
If you have a lot of reverse lookups to do
You need to set the timeout to "None" when you open the serial port:
ser = serial.Serial(**bco_port**, timeout=None, baudrate=115000, xonxoff=False, rtscts=False, dsrdtr=False)
This is a blocking command, so you are waiting until you receive data that has newline (\n or \r\n) at the end: line = ser.readline()
Once you have the data, it will return ASAP.
complementing the following comment
For those who use redux:
class AllowanceClass extends Component{
...
render() {
const classes = this.props.classes;
...
}
}
const COMAllowanceClass = (props) =>
{
const classes = useStyles();
return (<AllowanceClass classes={classes} {...props} />);
};
const mapStateToProps = ({ InfoReducer }) => ({
token: InfoReducer.token,
user: InfoReducer.user,
error: InfoReducer.error
});
export default connect(mapStateToProps, { actions })(COMAllowanceClass);
Short Answer:
Optional.isPresent()
valueOptional.isPresent() == false
In real code, you might want to consider the second approach when the required resource is expensive to get.
// Always get heavy resource
getResource(resourceId).orElse(getHeavyResource());
// Get heavy resource when required.
getResource(resourceId).orElseGet(() -> getHeavyResource())
For more details, consider the following example with this function:
public Optional<String> findMyPhone(int phoneId)
The difference is as below:
X : buyNewExpensivePhone() called
+——————————————————————————————————————————————————————————————————+——————————————+
| Optional.isPresent() | true | false |
+——————————————————————————————————————————————————————————————————+——————————————+
| findMyPhone(int phoneId).orElse(buyNewExpensivePhone()) | X | X |
+——————————————————————————————————————————————————————————————————+——————————————+
| findMyPhone(int phoneId).orElseGet(() -> buyNewExpensivePhone()) | | X |
+——————————————————————————————————————————————————————————————————+——————————————+
When optional.isPresent() == false
, there is no difference between two ways. However, when optional.isPresent() == true
, orElse()
always calls the subsequent function whether you want it or not.
Finally, the test case used is as below:
Result:
------------- Scenario 1 - orElse() --------------------
1.1. Optional.isPresent() == true (Redundant call)
Going to a very far store to buy a new expensive phone
Used phone: MyCheapPhone
1.2. Optional.isPresent() == false
Going to a very far store to buy a new expensive phone
Used phone: NewExpensivePhone
------------- Scenario 2 - orElseGet() --------------------
2.1. Optional.isPresent() == true
Used phone: MyCheapPhone
2.2. Optional.isPresent() == false
Going to a very far store to buy a new expensive phone
Used phone: NewExpensivePhone
Code:
public class TestOptional {
public Optional<String> findMyPhone(int phoneId) {
return phoneId == 10
? Optional.of("MyCheapPhone")
: Optional.empty();
}
public String buyNewExpensivePhone() {
System.out.println("\tGoing to a very far store to buy a new expensive phone");
return "NewExpensivePhone";
}
public static void main(String[] args) {
TestOptional test = new TestOptional();
String phone;
System.out.println("------------- Scenario 1 - orElse() --------------------");
System.out.println(" 1.1. Optional.isPresent() == true (Redundant call)");
phone = test.findMyPhone(10).orElse(test.buyNewExpensivePhone());
System.out.println("\tUsed phone: " + phone + "\n");
System.out.println(" 1.2. Optional.isPresent() == false");
phone = test.findMyPhone(-1).orElse(test.buyNewExpensivePhone());
System.out.println("\tUsed phone: " + phone + "\n");
System.out.println("------------- Scenario 2 - orElseGet() --------------------");
System.out.println(" 2.1. Optional.isPresent() == true");
// Can be written as test::buyNewExpensivePhone
phone = test.findMyPhone(10).orElseGet(() -> test.buyNewExpensivePhone());
System.out.println("\tUsed phone: " + phone + "\n");
System.out.println(" 2.2. Optional.isPresent() == false");
phone = test.findMyPhone(-1).orElseGet(() -> test.buyNewExpensivePhone());
System.out.println("\tUsed phone: " + phone + "\n");
}
}
The following PHP worked for me (using mysqli extension but queries should be the same for other extensions):
$db = new mysqli( 'localhost', 'user', 'pass', 'dbname' );
// to get the max_allowed_packet
$maxp = $db->query( 'SELECT @@global.max_allowed_packet' )->fetch_array();
echo $maxp[ 0 ];
// to set the max_allowed_packet to 500MB
$db->query( 'SET @@global.max_allowed_packet = ' . 500 * 1024 * 1024 );
So if you've got a query you expect to be pretty long, you can make sure that mysql will accept it with something like:
$sql = "some really long sql query...";
$db->query( 'SET @@global.max_allowed_packet = ' . strlen( $sql ) + 1024 );
$db->query( $sql );
Notice that I added on an extra 1024 bytes to the length of the string because according to the manual,
The value should be a multiple of 1024; nonmultiples are rounded down to the nearest multiple.
That should hopefully set the max_allowed_packet size large enough to handle your query. I haven't tried this on a shared host, so the same caveat as @Glebushka applies.
(I would have added a comment directly to vasekt's answer but I don't have enough reputation points (not sure the logic there)
Anyway... what I wanted to say is that even if you aren't explicitly creating/asking for a PoolingConnection, doesn't mean you aren't getting one.
I was going crazy trying to figure out why the original solution didn't work for me, but I ignored vasekt's answer as it "didn't apply to my case" - wrong!
I was staring at my stack-trace when low and behold I saw a PoolingConnection in the middle of it. Bang - I tired his addition and success!! (our demo is tomorrow and I was getting desperate) :-)
Using method 5 from above (The Pseudo File) we can get very good perf and flexibility
from cStringIO import StringIO
class StringBuilder:
_file_str = None
def __init__(self):
self._file_str = StringIO()
def Append(self, str):
self._file_str.write(str)
def __str__(self):
return self._file_str.getvalue()
now using it
sb = StringBuilder()
sb.Append("Hello\n")
sb.Append("World")
print sb
On localhost you should consider context path.
function wsURL(path) {
var protocol = (location.protocol === 'https:') ? 'wss://' : 'ws://';
var url = protocol + location.host;
if(location.hostname === 'localhost') {
url += '/' + location.pathname.split('/')[1]; // add context path
}
return url + path;
}
Your issue is in PHPMyAdmin itself. Some versions do not display the value of bit columns, even though you did set it correctly.
<input type="button" onclick="functionA();functionB();" />
function functionA()
{
}
function functionB()
{
}
1 You can use a drawable
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/menu_item1"
android:icon="@drawable/my_item_drawable"
android:title="@string/menu_item1"
android:showAsAction="ifRoom" />
</menu>
2 Create a style for the action bar and use a custom background:
<resources>
<!-- the theme applied to the application or activity -->
<style name="CustomActivityTheme" parent="@android:style/Theme.Holo">
<item name="android:actionBarStyle">@style/MyActionBar</item>
<!-- other activity and action bar styles here -->
</style>
<!-- style for the action bar backgrounds -->
<style name="MyActionBar" parent="@android:style/Widget.Holo.ActionBar">
<item name="android:background">@drawable/background</item>
<item name="android:backgroundStacked">@drawable/background</item>
<item name="android:backgroundSplit">@drawable/split_background</item>
</style>
</resources>
3 Style again android:actionBarDivider
The android documentation is very usefull for that.
This function shortens a string by adding "..."
at a word boundary whenever possible. The returned string will have a maximum length of $len
including "..."
.
function truncate($str, $len) {
$tail = max(0, $len-10);
$trunk = substr($str, 0, $tail);
$trunk .= strrev(preg_replace('~^..+?[\s,:]\b|^...~', '...', strrev(substr($str, $tail, $len-$tail))));
return $trunk;
}
Examples outputs:
truncate("Thanks for contributing an answer to Stack Overflow!", 15)
"Thanks for..."
truncate("To learn more, see our tips on writing great answers.", 15)
"To learn more..."
(comma also truncated)truncate("Pseudopseudohypoparathyroidism", 15)
"Pseudopseudo..."
I know this is an older question but here are the steps I used to get cassandra-driver
to actually install on Windows 7 / Python2. I have windows 10 / Python3 at home where I will test this tonight. I have confirmed this also works on Windows 10 with both Python 2 and 3.
Problem
Command "python setup.py egg_info" failed with error code 1 in c:\users\Frito\appdata\local\temp\pip-build-7dgmdc\cassandra-driver
TL;DR Solution
Solution (I'd love for someone to explain why this worked)
pip install cassandra-driver
and got the above error messagepip install --pre cassandra-driver
and got the following errordistutils.errors.DistutilsError: Setup script exited with error: Microsoft Visual C++ 9.0 is required (Unable to find vcvarsall.bat). Get it from http://aka.ms/vcpython27 Command "c:\users\Frito\.virtualenvs\symdash\scripts\python.exe -u -c "import setuptools, tokenize;__file__='c:\\users\\Frito\\appdata\\local\\temp\\pip-build-sesxxu\\cassandra-driver\\setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record c:\users\Frito\appdata\local\temp\pip-ujsxsk-record\install-record.txt --single-version-externally-managed --compile --install-headers c:\users\Frito\.virtualenvs\symdash\include\site\python2.7\cassandra-driver" failed with error code 1 in c:\users\Frito\appdata\local\temp\pip-build-sesxxu\cassandra-driver
Microsoft Visual C++ Compiler for Python 2.7
pip install --pre cassandra-driver
pip uninstall cassandra-driver
pip install cassandra-driver
To reiterate, I'm not really sure why this worked. Right now my two leading conclusions are that either the C++ compiler is required or that running the --pre
option the first time installed some dependencies that were missing from the 'regular' install. I'll update tonight after work when I have more details.
Delete gradle cache files.
It can be in path like
C:\Users\username\.gradle\caches
for Windows users.
For UNIX based operating systems it will be
~/.gradle/caches
.
void addToSpecific()
{
int n;
int f=0; //flag
Node *temp=H; //H-Head, T-Tail
if(NULL!=H)
{
cout<<"Enter the Number"<<endl;
cin>>n;
while(NULL!=(temp->getNext()))
{
if(n==(temp->getInfo()))
{
f=1;
break;
}
temp=temp->getNext();
}
}
if(NULL==H)
{
Node *nn=new Node();
nn->setInfo();
nn->setNext(NULL);
T=H=nn;
}
else if(0==f)
{
Node *nn=new Node();
nn->setInfo();
nn->setNext(NULL);
T->setNext(nn);
T=nn;
}
else if(1==f)
{
Node *nn=new Node();
nn->setInfo();
nn->setNext(NULL);
nn->setNext((temp->getNext()));
temp->setNext(nn);
}
}
I had the same problem and my issue was simply that I had not annotated the class properly using @RunWith. In your example, make sure that you have:
@RunWith(MockitoJUnitRunner.class)
public class Test {
...
Once I did that, the NullPointerExceptions disappeared.
When using Monkey Script I noticed that DispatchPress(KEYCODE_BACK) is doing nothing which really suck. In many cases this is due to the fact that the Activity doesn't consume the Key event. The solution to this problem is to use a mix of monkey script and adb shell input command in a sequence.
1 Using monkey script gave some great timing
control. Wait a certain amount of second for the activity and is a
blocking adb call.
2 Finally sending adb shell input keyevent 4 will end the running APK.
EG
adb shell monkey -p com.my.application -v -v -v -f /sdcard/monkey_script.txt 1
adb shell input keyevent 4
I mostly build large scale, high availability type systems, so my answer is biased towards looking at it from a production support standpoint; that said, we assign roughly as follows:
error: the system is in distress, customers are probably being affected (or will soon be) and the fix probably requires human intervention. The "2AM rule" applies here- if you're on call, do you want to be woken up at 2AM if this condition happens? If yes, then log it as "error".
warn: an unexpected technical or business event happened, customers may be affected, but probably no immediate human intervention is required. On call people won't be called immediately, but support personnel will want to review these issues asap to understand what the impact is. Basically any issue that needs to be tracked but may not require immediate intervention.
info: things we want to see at high volume in case we need to forensically analyze an issue. System lifecycle events (system start, stop) go here. "Session" lifecycle events (login, logout, etc.) go here. Significant boundary events should be considered as well (e.g. database calls, remote API calls). Typical business exceptions can go here (e.g. login failed due to bad credentials). Any other event you think you'll need to see in production at high volume goes here.
debug: just about everything that doesn't make the "info" cut... any message that is helpful in tracking the flow through the system and isolating issues, especially during the development and QA phases. We use "debug" level logs for entry/exit of most non-trivial methods and marking interesting events and decision points inside methods.
trace: we don't use this often, but this would be for extremely detailed and potentially high volume logs that you don't typically want enabled even during normal development. Examples include dumping a full object hierarchy, logging some state during every iteration of a large loop, etc.
As or more important than choosing the right log levels is ensuring that the logs are meaningful and have the needed context. For example, you'll almost always want to include the thread ID in the logs so you can follow a single thread if needed. You may also want to employ a mechanism to associate business info (e.g. user ID) to the thread so it gets logged as well. In your log message, you'll want to include enough info to ensure the message can be actionable. A log like " FileNotFound exception caught" is not very helpful. A better message is "FileNotFound exception caught while attempting to open config file: /usr/local/app/somefile.txt. userId=12344."
There are also a number of good logging guides out there... for example, here's an edited snippet from JCL (Jakarta Commons Logging):
- error - Other runtime errors or unexpected conditions. Expect these to be immediately visible on a status console.
- warn - Use of deprecated APIs, poor use of API, 'almost' errors, other runtime situations that are undesirable or unexpected, but not necessarily "wrong". Expect these to be immediately visible on a status console.
- info - Interesting runtime events (startup/shutdown). Expect these to be immediately visible on a console, so be conservative and keep to a minimum.
- debug - detailed information on the flow through the system. Expect these to be written to logs only.
- trace - more detailed information. Expect these to be written to logs only.
This can also happen when trying to throw an ArgumentException
where you inadvertently call the ArgumentException
constructor overload
public static void Dostuff(Foo bar)
{
// this works
throw new ArgumentException(String.Format("Could not find {0}", bar.SomeStringProperty));
//this gives the error
throw new ArgumentException(String.Format("Could not find {0}"), bar.SomeStringProperty);
}
check the link below, it has the html, css, JS and a live demo :) enjoy
http://codepen.io/senff/pen/ayGvD
// Create a clone of the menu, right next to original._x000D_
$('.menu').addClass('original').clone().insertAfter('.menu').addClass('cloned').css('position','fixed').css('top','0').css('margin-top','0').css('z-index','500').removeClass('original').hide();_x000D_
_x000D_
scrollIntervalID = setInterval(stickIt, 10);_x000D_
_x000D_
_x000D_
function stickIt() {_x000D_
_x000D_
var orgElementPos = $('.original').offset();_x000D_
orgElementTop = orgElementPos.top; _x000D_
_x000D_
if ($(window).scrollTop() >= (orgElementTop)) {_x000D_
// scrolled past the original position; now only show the cloned, sticky element._x000D_
_x000D_
// Cloned element should always have same left position and width as original element. _x000D_
orgElement = $('.original');_x000D_
coordsOrgElement = orgElement.offset();_x000D_
leftOrgElement = coordsOrgElement.left; _x000D_
widthOrgElement = orgElement.css('width');_x000D_
_x000D_
$('.cloned').css('left',leftOrgElement+'px').css('top',0).css('width',widthOrgElement+'px').show();_x000D_
$('.original').css('visibility','hidden');_x000D_
} else {_x000D_
// not scrolled past the menu; only show the original menu._x000D_
$('.cloned').hide();_x000D_
$('.original').css('visibility','visible');_x000D_
}_x000D_
}
_x000D_
* {font-family:arial; margin:0; padding:0;}_x000D_
.logo {font-size:40px; font-weight:bold;color:#00a; font-style:italic;}_x000D_
.intro {color:#777; font-style:italic; margin:10px 0;}_x000D_
.menu {background:#00a; color:#fff; height:40px; line-height:40px;letter-spacing:1px; width:100%;}_x000D_
.content {margin-top:10px;}_x000D_
.menu-padding {padding-top:40px;}_x000D_
.content {padding:10px;}_x000D_
.content p {margin-bottom:20px;}
_x000D_
<div class="intro">Some tagline goes here</div>
_x000D_
Checks for errors:
Dim result As String = str
If str.Length > 5 Then
result = str.Substring(str.Length - 5)
End If
For those who use java/android and struggle with this matter try:
"^\\p{L}+[\\p{L}\\p{Z}\\p{P}]{0,}"
This works with names like
It depends on where you're displaying the text. On the console or a textbox for example, \n will suffice. On a RichTextBox I think you need both.
I had a similar problem and I tried multiple solution. I solved it implementing 2 considerations.
dangerouslySetInnerHtml
to embed the <video>
code. For example:<div dangerouslySetInnerHTML={{ __html: `
<video class="video-js" playsinline autoplay loop muted>
<source src="../video_path.mp4" type="video/mp4"/>
</video>`}}
/>
Also, thanks to @boltcoder for his guide: Autoplay muted HTML5 video using React on mobile (Safari / iOS 10+)
FILE_NAME = 'file.txt'
wordCounter = {}
with open(FILE_NAME,'r') as fh:
for line in fh:
# Replacing punctuation characters. Making the string to lower.
# The split will spit the line into a list.
word_list = line.replace(',','').replace('\'','').replace('.','').lower().split()
for word in word_list:
# Adding the word into the wordCounter dictionary.
if word not in wordCounter:
wordCounter[word] = 1
else:
# if the word is already in the dictionary update its count.
wordCounter[word] = wordCounter[word] + 1
print('{:15}{:3}'.format('Word','Count'))
print('-' * 18)
# printing the words and its occurrence.
for (word,occurance) in wordCounter.items():
print('{:15}{:3}'.format(word,occurance))
#
Word Count
------------------
of 6
examples 2
used 2
development 2
modified 2
open-source 2
Step 1: Freeze requirement & take a back-up of existing env
pip freeze > requirements.txt
deactivate
mv env env_old
Step 2: Install Python 3.7 & activate virutal environment
sudo apt-get install python3.7-venv
python3.7 -m venv env
source env/bin/activate
python --version
Step 3: Install requirements
sudo apt-get install python3.7-dev
pip3 install -r requirements.txt
That means that the definition of your function is not present in your program. You forgot to add that one.cpp
to your program.
What "to add" means in this case depends on your build environment and its terminology. In MSVC (since you are apparently use MSVC) you'd have to add one.cpp
to the project.
In more practical terms, applicable to all typical build methodologies, when you link you program, the object file created form one.cpp
is missing.
You need to load your JNI library.
System.loadLibrary loads the DLL from the JVM path (JDK bin path).
If you want to load an explicit file with a path, use System.load()
See also: Difference between System.load() and System.loadLibrary in Java
For narrowing the type of the property, simple extend
works perfect, as in Nitzan's answer:
interface A {
x: string | number;
}
interface B extends A {
x: number;
}
For widening, or generally overriding the type, you can do Zskycat's solution:
interface A {
x: string
}
export type B = Omit<A, 'x'> & { x: number };
But, if your interface A
is extending a general interface, you will lose the custom types of A
's remaining properties when using Omit
.
e.g.
interface A extends Record<string | number, number | string | boolean> {
x: string;
y: boolean;
}
export type B = Omit<A, 'x'> & { x: number };
let b: B = { x: 2, y: "hi" }; // no error on b.y!
The reason is, Omit
internally only goes over Exclude<keyof A, 'x'>
keys which will be the general string | number
in our case. So, B
would become {x: number; }
and accepts any extra property with the type of number | string | boolean
.
To fix that, I came up with a different OverrideProps
utility type as following:
type OverrideProps<M, N> = { [P in keyof M]: P extends keyof N ? N[P] : M[P] };
Example:
type OverrideProps<M, N> = { [P in keyof M]: P extends keyof N ? N[P] : M[P] };
interface A extends Record<string | number, number | string | boolean> {
x: string;
y: boolean;
}
export type B = OverrideProps<A, { x: number }>;
let b: B = { x: 2, y: "hi" }; // error: b.y should be boolean!
If you only need to parse unsigned unencrypted tokens you could use this code:
boolean parseJWT_2() {
String authToken = getToken();
String[] segments = authToken.split("\\.");
String base64String = segments[1];
int requiredLength = (int)(4 * Math.ceil(base64String.length() / 4.0));
int nbrPaddings = requiredLength - base64String.length();
if (nbrPaddings > 0) {
base64String = base64String + "====".substring(0, nbrPaddings);
}
base64String = base64String.replace("-", "+");
base64String = base64String.replace("_", "/");
try {
byte[] data = Base64.decode(base64String, Base64.DEFAULT);
String text;
text = new String(data, "UTF-8");
tokenInfo = new Gson().fromJson(text, TokenInfo.class);
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
In a nutshell, ZooKeeper helps you build distributed applications.
You may describe ZooKeeper as a replicated synchronization service with eventual consistency. It is robust, since the persisted data is distributed between multiple nodes (this set of nodes is called an "ensemble") and one client connects to any of them (i.e., a specific "server"), migrating if one node fails; as long as a strict majority of nodes are working, the ensemble of ZooKeeper nodes is alive. In particular, a master node is dynamically chosen by consensus within the ensemble; if the master node fails, the role of master migrates to another node.
The master is the authority for writes: in this way writes can be guaranteed to be persisted in-order, i.e., writes are linear. Each time a client writes to the ensemble, a majority of nodes persist the information: these nodes include the server for the client, and obviously the master. This means that each write makes the server up-to-date with the master. It also means, however, that you cannot have concurrent writes.
The guarantee of linear writes is the reason for the fact that ZooKeeper does not perform well for write-dominant workloads. In particular, it should not be used for interchange of large data, such as media. As long as your communication involves shared data, ZooKeeper helps you. When data could be written concurrently, ZooKeeper actually gets in the way, because it imposes a strict ordering of operations even if not strictly necessary from the perspective of the writers. Its ideal use is for coordination, where messages are exchanged between the clients.
This is where ZooKeeper excels: reads are concurrent since they are served by the specific server that the client connects to. However, this is also the reason for the eventual consistency: the "view" of a client may be outdated, since the master updates the corresponding server with a bounded but undefined delay.
The replicated database of ZooKeeper comprises a tree of znodes, which are entities roughly representing file system nodes (think of them as directories). Each znode may be enriched by a byte array, which stores data. Also, each znode may have other znodes under it, practically forming an internal directory system.
Interestingly, the name of a znode can be sequential, meaning that the name the client provides when creating the znode is only a prefix: the full name is also given by a sequential number chosen by the ensemble. This is useful, for example, for synchronization purposes: if multiple clients want to get a lock on a resource, they can each concurrently create a sequential znode on a location: whoever gets the lowest number is entitled to the lock.
Also, a znode may be ephemeral: this means that it is destroyed as soon as the client that created it disconnects. This is mainly useful in order to know when a client fails, which may be relevant when the client itself has responsibilities that should be taken by a new client. Taking the example of the lock, as soon as the client having the lock disconnects, the other clients can check whether they are entitled to the lock.
The example related to client disconnection may be problematic if we needed to periodically poll the state of znodes. Fortunately, ZooKeeper offers an event system where a watch can be set on a znode. These watches may be set to trigger an event if the znode is specifically changed or removed or new children are created under it. This is clearly useful in combination with the sequential and ephemeral options for znodes.
A canonical example of Zookeeper usage is distributed-memory computation, where some data is shared between client nodes and must be accessed/updated in a very careful way to account for synchronization.
ZooKeeper offers the library to construct your synchronization primitives, while the ability to run a distributed server avoids the single-point-of-failure issue you have when using a centralized (broker-like) message repository.
ZooKeeper is feature-light, meaning that mechanisms such as leader election, locks, barriers, etc. are not already present, but can be written above the ZooKeeper primitives. If the C/Java API is too unwieldy for your purposes, you should rely on libraries built on ZooKeeper such as cages and especially curator.
Official documentation apart, which is pretty good, I suggest to read Chapter 14 of Hadoop: The Definitive Guide which has ~35 pages explaining essentially what ZooKeeper does, followed by an example of a configuration service.
Android needs to be compiled for every hardware plattform / every device model seperatly with the specific drivers etc. If you manage to do that you need also break the security arrangements every manufacturer implements to prevent the installation of other software - these are also different between each model / manufacturer. So it is possible at in theory, but only there :-)
Tomcat 8 : After many searches this is only working code: in server.xml
<!-- Set /apple as default path -->
<Host name="localhost" appBase="webapps"
unpackWARs="true" autoDeploy="true">
<Context path="" docBase="apple">
<!-- Default set of monitored resources -->
<WatchedResource>WEB-INF/web.xml</WatchedResource>
</Context>
</Host>
Restart Tomcat, make sure when you access 127.0.0.1:8080, it will display the content in 127.0.0.1:8080/apple
My project was java web application witch created by netbeans ,I set context path in project configuration, no other thing, even I put apple.war in webapps folder.
How about
SELECT user()
I use this before.MySQL, H2 is OK, I don't know others.
chunk2 <- function(x,n) split(x, cut(seq_along(x), n, labels = FALSE))
This is an old question, but attempting to apply a new field (either NEWID() or ORDER BY rand()) to a table with a large number of rows would be prohibitively expensive. If you have incremental, unique IDs (and do not have any holes) it will be more efficient to calculate the X # of IDs to be selected instead of applying a GUID or similar to every single row and then taking the top X # of.
DECLARE @minValue int;
DECLARE @maxValue int;
SELECT @minValue = min(id), @maxValue = max(id) from [TABLE];
DECLARE @randomId1 int, @randomId2 int, @randomId3 int, @randomId4 int, @randomId5 int
SET @randomId1 = ((@maxValue + 1) - @minValue) * Rand() + @minValue
SET @randomId2 = ((@maxValue + 1) - @minValue) * Rand() + @minValue
SET @randomId3 = ((@maxValue + 1) - @minValue) * Rand() + @minValue
SET @randomId4 = ((@maxValue + 1) - @minValue) * Rand() + @minValue
SET @randomId5 = ((@maxValue + 1) - @minValue) * Rand() + @minValue
--select @maxValue as MaxValue, @minValue as MinValue
-- , @randomId1 as SelectedId1
-- , @randomId2 as SelectedId2
-- , @randomId3 as SelectedId3
-- , @randomId4 as SelectedId4
-- , @randomId5 as SelectedId5
select * from [TABLE] el
where el.id in (@randomId1, @randomId2, @randomId3, @randomId4, @randomId5)
If you wanted to select many more rows I would look into populating a #tempTable with an ID and a bunch of rand() values then using each rand() value to scale to the min-max values. That way you do not have to define all of the @randomId1...n parameters. I've included an example below using a CTE to populate the initial table.
DECLARE @NumItems int = 100;
DECLARE @minValue int;
DECLARE @maxValue int;
SELECT @minValue = min(id), @maxValue = max(id) from [TABLE];
DECLARE @range int = @maxValue+1 - @minValue;
with cte (n) as (
select 1 union all
select n+1 from cte
where n < @NumItems
)
select cast( @range * rand(cast(newid() as varbinary(100))) + @minValue as int) tp
into #Nt
from cte;
select * from #Nt ntt
inner join [TABLE] i on i.id = ntt.tp;
drop table #Nt;
I found the answer.
You can configure IE8 to display application/json in the browser window by updating the registry. There's no need for an external tool. I haven't tested this broadly, but it works with IE8 on Vista.
To use this, remember, all the usual caveats about updating the registry apply. Stop IE. Then, cut and paste the following into a file, by the name of json-ie.reg
.
Windows Registry Editor Version 5.00
;
; Tell IE to open JSON documents in the browser.
; 25336920-03F9-11cf-8FD0-00AA00686F13 is the CLSID for the "Browse in place" .
;
[HKEY_CLASSES_ROOT\MIME\Database\Content Type\application/json]
"CLSID"="{25336920-03F9-11cf-8FD0-00AA00686F13}"
"Encoding"=hex:08,00,00,00
[HKEY_CLASSES_ROOT\MIME\Database\Content Type\text/json]
"CLSID"="{25336920-03F9-11cf-8FD0-00AA00686F13}"
"Encoding"=hex:08,00,00,00
Then double-click the .reg file. Restart IE. The new behavior you get when tickling a URL that returns a doc with Content-Type: application/json
or Content-Type: text/json
is like this:
What it does, why it works:
The 25336920-03F9-11cf-8FD0-00AA00686F13
is the CLSID for the "Browse in place" action. Basically this registry entry is telling IE that for docs that have a mime type of application/json, just view it in place. This won't affect any application/json documents downloaded via <script>
tags, or via XHR, and so on.
The CLSID and Encoding keys get the same values used for image/gif
, image/jpeg
, and text/html
.
This hint came from this site, and from Microsoft's article Handling MIME Types in Internet Explorer .
In FF, you don't need an external add-on either. You can just use the view-source:
pseudo-protocol. Enter a URL like this into the address bar:
view-source:http://myserver/MyUrl/That/emits/Application/json
This pseudo-protocol used to be supported in IE, also, until WinXP-sp2, when Microsoft disabled it for security reasons.
I encourage the use and utilization of nondestructive methods that don't modify the original source, 'Object.assign' is a destructive method and it also happens to be not so production friendly because it stops working on earlier browsers and you have no way of patching it cleanly, with an alternative.
Merging JS Objects will always be out of reach, or incomplete, whatever the solution. But merging JSON compliant compatible objects is just one step away from being able to write a simple and portable piece of code of a nondestructive method of merging series of JS Objects into a returned master containing all the unique property-names and their corresponding values synthesized in a single master object for the intended purpose.
Having in mind that MSIE8 is the first browser to have added a native support for the JSON object is a great relief, and reusing the already existing technology, is always a welcomed opportunity.
Restricting your code to JSON complant standard objects, is more of an advantage, than a restriction - since these objects can also be transmitted over the Internet. And of course for those who would like a deeper backward compatibility there's always a json plug., whose methods can easily be assigned to a JSON variable in the outer code without having to modify or rewrite the method in use.
function Merge( ){
var a = [].slice.call( arguments ), i = 0;
while( a[i] )a[i] = JSON.stringify( a[i++] ).slice( 1,-1 );
return JSON.parse( "{"+ a.join() +"}" );
}
(Of course one can always give it a more meaningful name, which I haven't decided yet; should probably name it JSONmerge)
The use case:
var master = Merge( obj1, obj2, obj3, ...objn );
Now, contrary to the Object.assign
this leaves all objects untouched and in their original state (in case you've done something wrong and need to reorder the merging objects or be able to use them separately for some other operation before merging them again).
Tthe number of the Merge arguments is also limited only by the arguments length limit [which is huge].
The natively supported JSON parse / stringify is already machine optimized, meaning: it should be faster than any scripted form of JS loop.
The iteration over given arguments, is being done using the while
- proven to be the fastest loop in JS.
It doesn't harm to briefly mention the fact we already know that duplicate properties of the unique object labels (keys) will be overwritten by the later object containing the same key label, which means you are in control of which property is taking over the previous by simply ordering or reordering the arguments list. And the benefit of getting a clean and updated master object with no dupes as a final output.
;_x000D_
var obj1 = {a:1}, obj2 = {b:2}, obj3 = {c:3}_x000D_
;_x000D_
function Merge( ){_x000D_
var a = [].slice.call( arguments ), i = 0;_x000D_
while( a[i] )a[i] = JSON.stringify( a[i++] ).slice( 1,-1 );_x000D_
return JSON.parse( "{"+ a.join() +"}" );_x000D_
}_x000D_
;_x000D_
var master = Merge( obj1, obj2, obj3 )_x000D_
;_x000D_
console.log( JSON.stringify( master ) )_x000D_
;
_x000D_
Model:
namespace MvcApplicationrazor.Models
{
public class CountryModel
{
public List<State> StateModel { get; set; }
public SelectList FilteredCity { get; set; }
}
public class State
{
public int Id { get; set; }
public string StateName { get; set; }
}
public class City
{
public int Id { get; set; }
public int StateId { get; set; }
public string CityName { get; set; }
}
}
Controller:
public ActionResult Index()
{
CountryModel objcountrymodel = new CountryModel();
objcountrymodel.StateModel = new List<State>();
objcountrymodel.StateModel = GetAllState();
return View(objcountrymodel);
}
//Action result for ajax call
[HttpPost]
public ActionResult GetCityByStateId(int stateid)
{
List<City> objcity = new List<City>();
objcity = GetAllCity().Where(m => m.StateId == stateid).ToList();
SelectList obgcity = new SelectList(objcity, "Id", "CityName", 0);
return Json(obgcity);
}
// Collection for state
public List<State> GetAllState()
{
List<State> objstate = new List<State>();
objstate.Add(new State { Id = 0, StateName = "Select State" });
objstate.Add(new State { Id = 1, StateName = "State 1" });
objstate.Add(new State { Id = 2, StateName = "State 2" });
objstate.Add(new State { Id = 3, StateName = "State 3" });
objstate.Add(new State { Id = 4, StateName = "State 4" });
return objstate;
}
//collection for city
public List<City> GetAllCity()
{
List<City> objcity = new List<City>();
objcity.Add(new City { Id = 1, StateId = 1, CityName = "City1-1" });
objcity.Add(new City { Id = 2, StateId = 2, CityName = "City2-1" });
objcity.Add(new City { Id = 3, StateId = 4, CityName = "City4-1" });
objcity.Add(new City { Id = 4, StateId = 1, CityName = "City1-2" });
objcity.Add(new City { Id = 5, StateId = 1, CityName = "City1-3" });
objcity.Add(new City { Id = 6, StateId = 4, CityName = "City4-2" });
return objcity;
}
View:
@model MvcApplicationrazor.Models.CountryModel
@{
ViewBag.Title = "Index";
Layout = "~/Views/Shared/_Layout.cshtml";
}
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js"></script>
<script language="javascript" type="text/javascript">
function GetCity(_stateId) {
var procemessage = "<option value='0'> Please wait...</option>";
$("#ddlcity").html(procemessage).show();
var url = "/Test/GetCityByStateId/";
$.ajax({
url: url,
data: { stateid: _stateId },
cache: false,
type: "POST",
success: function (data) {
var markup = "<option value='0'>Select City</option>";
for (var x = 0; x < data.length; x++) {
markup += "<option value=" + data[x].Value + ">" + data[x].Text + "</option>";
}
$("#ddlcity").html(markup).show();
},
error: function (reponse) {
alert("error : " + reponse);
}
});
}
</script>
<h4>
MVC Cascading Dropdown List Using Jquery</h4>
@using (Html.BeginForm())
{
@Html.DropDownListFor(m => m.StateModel, new SelectList(Model.StateModel, "Id", "StateName"), new { @id = "ddlstate", @style = "width:200px;", @onchange = "javascript:GetCity(this.value);" })
<br />
<br />
<select id="ddlcity" name="ddlcity" style="width: 200px">
</select>
<br /><br />
}
The name of the resource is the name space plus the "pseudo" name space of the path to the file. The "pseudo" name space is made by the sub folder structure using \ (backslashes) instead of . (dots).
public static Stream GetResourceFileStream(String nameSpace, String filePath)
{
String pseduoName = filePath.Replace('\\', '.');
Assembly assembly = Assembly.GetExecutingAssembly();
return assembly.GetManifestResourceStream(nameSpace + "." + pseduoName);
}
The following call:
GetResourceFileStream("my.namespace", "resources\\xml\\my.xml")
will return the stream of my.xml located in the folder-structure resources\xml in the name space: my.namespace.
either (plain js)
this.checked = false;
or (jQuery)
$(this).prop('checked', false);
// Note that the pre-jQuery 1.6 idiom was
// $(this).attr('checked', false);
See jQuery prop() help page for an explanation on the difference between attr() and prop() and why prop() is now preferable.
prop() was introduced with jQuery 1.6 in May 2011.
I arrive late I know but I answer this because I think this solution is simple and elegant:
List<String> listFixed = new ArrayList<String>();
List<String> dynamicList = new ArrayList<String>();
public void fillingList() {
listFixed.add("Andrea");
listFixed.add("Susana");
listFixed.add("Oscar");
listFixed.add("Valeria");
listFixed.add("Kathy");
listFixed.add("Laura");
listFixed.add("Ana");
listFixed.add("Becker");
listFixed.add("Abraham");
dynamicList.addAll(listFixed);
}
public void updatingListFixed() {
for (String newList : dynamicList) {
if (!listFixed.contains(newList)) {
listFixed.add(newList);
}
}
//this is for add elements if you want eraser also
String removeRegister="";
for (String fixedList : listFixed) {
if (!dynamicList.contains(fixedList)) {
removeResgister = fixedList;
}
}
fixedList.remove(removeRegister);
}
All this is for updating from one list to other and you can make all from just one list and in method updating you check both list and can eraser or add elements betwen list. This means both list always it same size
Per Mozilla's Map documentation, you can initialize as follows:
private _gridOptions:Map<string, Array<string>> =
new Map([
["1", ["test"]],
["2", ["test2"]]
]);
I had the same issue using a node module with a react application written in typescript. The module was successfully installed using npm i --save my-module
.
It is written in javascript and exports a Client
class.
With:
import * as MyModule from 'my-module';
let client: MyModule.Client = new MyModule.Client();
Compilation fails with the error:
Could not find a declaration file for module 'my-module'.
'[...]/node_modules/my-module/lib/index.js' implicitly has an 'any' type.
Try `npm install @types/my-module` if it exists or add a new declaration (.d.ts) file containing `declare module 'my-module';`
@types/my-module
does not exist, so I added a my-module.d.ts
file next to the one where my-module
is imported, with the suggested line. I then got the error:
Namespace '"my-module"' has no exported member 'Client'.
The client is actually exported and works normally if I use it in a js app. Also, the previous message tells me that the compiler is looking in the right file (/node_modules/my-module/lib/index.js
is defined in my-module/package.json
"main"
element).
I solved the issue by telling the compiler I do not care about implicit any
, that is, I set to false
the following line of the tsconfig.json
file:
"noImplicitAny": false,
When you perform a boolean comparison between two vectors in R, the "expectation" is that both vectors are of the same length, so that R can compare each corresponding element in turn.
R has a much loved (or hated) feature called recycling, whereby in many circumstances if you try to do something where R would normally expect objects to be of the same length, it will automatically extend, or recycle, the shorter object to force both objects to be of the same length.
If the longer object is a multiple of the shorter, this amounts to simply repeating the shorter object several times. Oftentimes R programmers will take advantage of this to do things more compactly and with less typing.
But if they are not multiples, R will worry that you may have made a mistake, and perhaps didn't mean to perform that comparison, hence the warning.
Explore yourself with the following code:
> x <- 1:3
> y <- c(1,2,4)
> x == y
[1] TRUE TRUE FALSE
> y1 <- c(y,y)
> x == y1
[1] TRUE TRUE FALSE TRUE TRUE FALSE
> y2 <- c(y,2)
> x == y2
[1] TRUE TRUE FALSE FALSE
Warning message:
In x == y2 :
longer object length is not a multiple of shorter object length
Exactly.
Projection means choosing which columns (or expressions) the query shall return.
Selection means which rows are to be returned.
if the query is
select a, b, c from foobar where x=3;
then "a, b, c" is the projection part, "where x=3" the selection part.
Take a look at my jquery videoBG plugin
http://syddev.com/jquery.videoBG/
Make any HTML5 video a site background... has an image fallback for browsers that don't support html5
Really easy to use
Let me know if you need any help.
Make sure you do not use the trailing semicolon: This will not work:
set JAVA_HOME=C:\Program Files (x86)\Java\jdk1.6.0_29;
This will:
set JAVA_HOME=C:\Program Files (x86)\Java\jdk1.6.0_29
I found it much easier to debut by printing out where each row meets the condition:
for n in df.columns:
if(np.where(df[n] == 103)):
print(n)
print(df[df[n] == 103].index)
Setting the image using picture.ImageLocation()
works fine, but you are using a relative path. Check your path against the location of the .exe
after it is built.
For example, if your .exe
is located at:
<project folder>/bin/Debug/app.exe
The image would have to be at:
<project folder>/bin/Image/1.jpg
Of course, you could just set the image at design-time (the Image
property on the PictureBox
property sheet).
If you must set it at run-time, one way to make sure you know the location of the image is to add the image file to your project. For example, add a new folder to your project, name it Image
. Right-click the folder, choose "Add existing item" and browse to your image (be sure the file filter is set to show image files). After adding the image, in the property sheet set the Copy to Output Directory
to Copy if newer
.
At this point the image file will be copied when you build the application and you can use
picture.ImageLocation = @"Image\1.jpg";
Use outline:none
to anchor tag class
To add to Matt wilson's answer I had a bunch of code-first entity classes but no database as I hadn't taken a backup. So I did the following on my Entity Framework project:
Open Package Manager console in Visual Studio and type the following:
Enable-Migrations
Add-Migration
Give your migration a name such as 'Initial' and then create the migration. Finally type the following:
Update-Database
Update-Database -Script -SourceMigration:0
The final command will create your database tables from your entity classes (provided your entity classes are well formed).
Unobtrusive JavaScript, no library dependency:
<html>
<head>
<script type="text/javascript">
// Wait for the page to load first
window.onload = function() {
//Get a reference to the link on the page
// with an id of "mylink"
var a = document.getElementById("mylink");
//Set code to run when the link is clicked
// by assigning a function to "onclick"
a.onclick = function() {
// Your code here...
//If you don't want the link to actually
// redirect the browser to another page,
// "google.com" in our example here, then
// return false at the end of this block.
// Note that this also prevents event bubbling,
// which is probably what we want here, but won't
// always be the case.
return false;
}
}
</script>
</head>
<body>
<a id="mylink" href="http://www.google.com">linky</a>
</body>
</html>
git merge --squash <feature branch>
is a good option .The "git commit" tells you all feature branch commit message with your choice to keep it .
For less commit merge .
git merge do x times --git reset HEAD^ --soft then git commit .
Risk - deleted files may come back .
document.location
was originally a read-only property, although Gecko browsers allow you to assign to it as well. For cross-browser safety, use window.location
instead.
Read more:
my best solution :
WHERE
COALESCE(char_length(fieldValue), 0) = 0
COALESCE returns the first non-null expr in the expression list().
if the fieldValue is null or empty string then: we will return the second element then 0.
so 0 is equal to 0 then this fieldValue is a null or empty string.
in python for exemple:
def coalesce(fieldValue):
if fieldValue in (null,''):
return 0
good luck
Adding a new answer in here because previous answers weren't explaining the issue I had. Problem is that the username required in SQL is the NAME of the app pool, and not its identity.
I ran in IIS with AppPools set to the ApplicationPoolIdentity
identity.
My SQL Security User name with access was called IIS APPPOOL\DefaultAppPool
and it was working fine with a ASP.NET Full Framework .net application.
When launching my ASP.NET Core application, it created a new AppPool with the application name, but no CLR version and still using the same ApplicationPoolIdentity
identity.
But after looking at the user name used via System.Security.Principal.WindowsIdentity.GetCurrent().Name
, I realized it isn't using DefaultAppPool, but the new app pool name. So I had to add a new user called IIS APPPOOL\ApplicationName
in the SQL security tab, and not the default.
You can use Integer.parseInt(str)
and catch the NumberFormatException
if the string is not a valid integer, in the following fashion (as pointed out by all answers):
static boolean isInt(String s)
{
try
{ int i = Integer.parseInt(s); return true; }
catch(NumberFormatException er)
{ return false; }
}
However, note here that if the evaluated integer overflows, the same exception will be thrown. Your purpose was to find out whether or not, it was a valid integer. So its safer to make your own method to check for validity:
static boolean isInt(String s) // assuming integer is in decimal number system
{
for(int a=0;a<s.length();a++)
{
if(a==0 && s.charAt(a) == '-') continue;
if( !Character.isDigit(s.charAt(a)) ) return false;
}
return true;
}
I want to display .jpg image in an Qt UI
The simpliest way is to use QLabel for this:
int main(int argc, char *argv[]) {
QApplication a(argc, argv);
QLabel label("<img src='image.jpg' />");
label.show();
return a.exec();
}
How will the browser know when to run the code inside script tag? So, to make the code run after the window is loaded completely,
window.onload = doStuff;
function doStuff() {
var e = document.getElementById("db_info");
e.innerHTML='Found you';
}
The other alternative is to keep your <script...</script>
just before the closing </body>
tag.
Why cant you use the finally block?
Like
try {
} catch (Exception e) {
// THIS WILL EXECUTE IF THERE IS AN EXCEPTION IS THROWN IN THE TRY BLOCK
} finally {
// THIS WILL EXECUTE IRRESPECTIVE OF WHETHER AN EXCEPTION IS THROWN WITHIN THE TRY CATCH OR NOT
}
EDIT after question amended:
You can do:
int? returnFromFunction2 = null;
try {
returnFromFunction2 = function2();
return returnFromFunction2.value;
} catch (Exception e) {
// THIS WILL EXECUTE IF THERE IS AN EXCEPTION IS THROWN IN THE TRY BLOCK
} finally {
if (returnFromFunction2.HasValue) { // do something with value }
// THIS WILL EXECUTE IRRESPECTIVE OF WHETHER AN EXCEPTION IS THROWN WITHIN THE TRY CATCH OR NOT
}
Building on @ddilsaver's answer. I wanted to be able to use a sprite for the bullet. This appears to work:
li {
list-style: none;
position: relative;
}
li:before {
content:'';
display: block;
position: absolute;
width: 20px;
height: 20px;
left: -30px;
top: 5px;
background-image: url(i20.png);
background-position: 0px -40px; /* or whatever offset you want */
}
The simple question to your answer is already answered a lot of times:
/*
LINES I WANT COMMENTED
LINES I WANT COMMENTED
LINES I WANT COMMENTED
*/
From your question it sounds like you want to comment out a lot of code?? I would advise to use a repository(git/github) to manage your files instead of commenting out lines.
Replace @RestController
with @Controller
.
Try it like this (heredoc syntax):
$variable = <<<XYZ
<html>
<body>
</body>
</html>
XYZ;
echo $variable;
Go has a foreach
-like syntax. It supports arrays/slices, maps and channels.
Iterate over array or slice:
// index and value
for i, v := range slice {}
// index only
for i := range slice {}
// value only
for _, v := range slice {}
Iterate over a map:
// key and value
for key, value := range theMap {}
// key only
for key := range theMap {}
// value only
for _, value := range theMap {}
Iterate over a channel:
for v := range theChan {}
Iterating over a channel is equivalent to receiving from a channel until it is closed:
for {
v, ok := <-theChan
if !ok {
break
}
}
The error you are getting is either because you are doing TO_DATE
on a column that's already a date, and you're using a format mask that is different to your nls_date_format
parameter[1] or because the event_occurrence column contains data that isn't a number.
You need to a) correct your query so that it's not using TO_DATE on the date column, and b) correct your data, if event_occurrence is supposed to be just numbers.
And fix the datatype of that column to make sure you can only store numbers.
[1] What Oracle does when you do: TO_DATE(date_column, non_default_format_mask)
is:
TO_DATE(TO_CHAR(date_column, nls_date_format), non_default_format_mask)
Generally, the default nls_date_format
parameter is set to dd-MON-yy
, so in your query, what is likely to be happening is your date column is converted to a string in the format dd-MON-yy, and you're then turning it back to a date using the format MMDD. The string is not in this format, so you get an error.
Here is the analysis in the book Data Structures and Algorithm Analysis in C by Mark Allen Weiss (second edition, 2.4.4):
Euclid's algorithm works by continually computing remainders until 0 is reached. The last nonzero remainder is the answer.
Here is the code:
unsigned int Gcd(unsigned int M, unsigned int N)
{
unsigned int Rem;
while (N > 0) {
Rem = M % N;
M = N;
N = Rem;
}
Return M;
}
Here is a THEOREM that we are going to use:
If M > N, then M mod N < M/2.
PROOF:
There are two cases. If N <= M/2, then since the remainder is smaller than N, the theorem is true for this case. The other case is N > M/2. But then N goes into M once with a remainder M - N < M/2, proving the theorem.
So, we can make the following inference:
Variables M N Rem
initial M N M%N
1 iteration N M%N N%(M%N)
2 iterations M%N N%(M%N) (M%N)%(N%(M%N)) < (M%N)/2
So, after two iterations, the remainder is at most half of its original value. This would show that the number of iterations is at most
2logN = O(logN)
.Note that, the algorithm computes Gcd(M,N), assuming M >= N.(If N > M, the first iteration of the loop swaps them.)
There is no goto
in bash.
Here is some dirty workaround using trap
which jumps only backwards:)
#!/bin/bash -e
trap '
echo I am
sleep 1
echo here now.
' EXIT
echo foo
goto trap 2> /dev/null
echo bar
Output:
$ ./test.sh
foo
I am
here now.
This shouldn't be used in that way, but only for educational purposes. Here is why this works:
trap
is using exception handling to achieve the change in code flow.
In this case the trap
is catching anything that causes the script to EXIT. The command goto
doesn't exist, and hence throws an error, which would ordinarily exit the script. This error is being caught with trap
, and the 2>/dev/null
hides the error message that would ordinarily be displayed.
This implementation of goto is obviously not reliable, since any non-existent command (or any other error, for that manner), would execute the same trap command. In particular, you cannot choose which label to go-to.
Basically in real scenario you don't need any goto statements, they're redundant as random calls to different places only make your code difficult to understand.
If your code is invoked many times, then consider to use loop and changing its workflow to use continue
and break
.
If your code repeats it-self, consider writing the function and calling it as many times as you want.
If your code needs to jump into specific section based on the variable value, then consider using case
statement.
If you can separate your long code into smaller pieces, consider moving it into separate files and call them from the parent script.
Long, and could maybe be shortened. Supports special characters ?"-_
.
\A(?=[-\?\"_a-zA-Z0-9]*?[A-Z])(?=[-\?\"_a-zA-Z0-9]*?[a-z])(?=[-\?\"_a-zA-Z0-9]*?[0-9])[-\?\"_a-zA-Z0-9]{8,15}\z
My preferred option on 2.0.0 and up is to create a 404 route and also allow a ** route path to resolve to the same component. This allows you to log and display more information about the invalid route rather than a plain redirect which can act to hide the error.
Simple 404 example:
{ path '/', component: HomeComponent },
// All your other routes should come first
{ path: '404', component: NotFoundComponent },
{ path: '**', component: NotFoundComponent }
To display the incorrect route information add in import to router within NotFoundComponent:
import { Router } from '@angular/router';
Add it to the constructior of NotFoundComponent:
constructor(public router: Router) { }
Then you're ready to reference it from your HTML template e.g.
The page <span style="font-style: italic">{{router.url}}</span> was not found.
I think this could help..
[[AFNetworkReachabilityManager sharedManager] startMonitoring];
if([AFNetworkReachabilityManager sharedManager].isReachable)
{
NSLog(@"Network reachable");
}
else
{
NSLog(@"Network not reachable");
}
I solve this problem by updating PC portable device drivers:
Go to : Settings
-> Applications
-> Development
to enable USB debugging
One user control can't be applied to it ownself. So open another winform and the one will appear in the toolbox.
This is a small tweak on the other answers. If you have nested divs you can include more exciting content such as H1s in your popup.
CSS
div.appear {
width: 250px;
border: #000 2px solid;
background:#F8F8F8;
position: relative;
top: 5px;
left:15px;
display:none;
padding: 0 20px 20px 20px;
z-index: 1000000;
}
div.hover {
cursor:pointer;
width: 5px;
}
div.hover:hover div.appear {
display:block;
}
HTML
<div class="hover">
<img src="questionmark.png"/>
<div class="appear">
<h1>My popup</h1>Hitherto and whenceforth.
</div>
</div>
The problem with these solutions is that everything after this in the page gets shifted when the popup is displayed, ie, the rest of the page jumps downwards to 'make space'. The only way I could fix this was by making position:absolute and removing the top and left CSS tags.
PDO driver for PostgreSQL is now included in the debian package php5-dev. The above steps using Pecl no longer works.
You can use these classes
input-lg
input
and
input-sm
for input fields and replace input with btn for buttons.
Check this documentation http://getbootstrap.com/getting-started/#migration
This will change only height of the element, to reduce the width you have to use grid system classes like col-xs-* col-md-* col-lg-*
.
Example col-md-3
. See doc here http://getbootstrap.com/css/#grid
You can use the JsonTextReader
to read the JSON and iterate over the tokens:
using (var reader = new JsonTextReader(new StringReader(jsonText)))
{
while (reader.Read())
{
Console.WriteLine("{0} - {1} - {2}",
reader.TokenType, reader.ValueType, reader.Value);
}
}
This is how I managed to make it work:
jQuery( document ).ready(function($) {
$('.myHTMLvideo').click(function() {
this.paused ? this.play() : this.pause();
});
});
All my HTML5 tags have the class 'myHTMLvideo'
Have you tried just
dictionary["cat"] = 5;
:)
Update
dictionary["cat"] = 5+2;
dictionary["cat"] = dictionary["cat"]+2;
dictionary["cat"] += 2;
Beware of non-existing keys :)
Yes, you should use docstrings to make your classes and functions more friendly to other programmers:
More: http://www.python.org/dev/peps/pep-0257/#what-is-a-docstring
Some editors allow you to see docstrings while typing, so it really makes work easier.
i have the same problem, but this piece of snippet alone solved my problem.
pip install psycopg2
After installing msysgit I have the Git Bash here
option in the context menu in Windows Explorer. So I just simply navigate to the directory and then open Bash right there.
I also copied the default Git Bash
shortcut to the desktop and edited its Start in
property to point to my project directory. It works flawlessly.
Windows 7x64, msysgit.
When debugging lines of code, here are the usual scenarios:
Eclipse has other advanced debugging features, but these are the basic fundamentals.
Although @Remus Rusanu's is already an excelent answer, in case one is looking forward a better insight on SQL Server's Deadlock causes and trace strategies, I would suggest you to read Brad McGehee's How to Track Down Deadlocks Using SQL Server 2005 Profiler
It's convenient to define a macro for get current timestamp
class Constant {
struct Time {
let now = { round(NSDate().timeIntervalSince1970) } // seconds
}
}
Then you can use let timestamp = Constant.Time.now()
Just to summarize, here are some commands that navigate to a directory and compile code using Cygwin and Windows Vista:
At the prompt, use cd
to change to the appropriate directory:
$ cd /cygdrive/c/Users/nate/Desktop
Use ls
to list the files in the directory:
$ ls
prog.c
Use the gcc
command to compile a file in this directory:
$ gcc prog.c -o prog
If you don't see any errors, you should be able to run the resulting program:
$ ./prog
Update:
For the "Cygwin1.dll not found
" error, I like Nik's answer. You might also check out this related post about cygwin1.dll not found, which suggests adding c:\cygwin\bin\
to your Windows PATH.
There are instructions on how to change the Windows PATH variable for Windows XP, and on Vista I think it's similar.
c:\cygwin\bin
to the list, making sure to separate it from any previous items with a semicolonBelow is example you can use:
create temp table test2 (
id1 numeric,
id2 numeric,
id3 numeric,
id4 numeric,
id5 numeric,
id6 numeric,
id7 numeric,
id8 numeric,
id9 numeric,
id10 numeric)
with (oids = false);
do
$do$
declare
i int;
begin
for i in 1..100000
loop
insert into test2 values (random(), i * random(), i / random(), i + random(), i * random(), i / random(), i + random(), i * random(), i / random(), i + random());
end loop;
end;
$do$;
More info
To find a compiler, you'll have 1 per .net version installed, type in a command prompt.
dir c:\Windows\Microsoft.NET\vbc.exe /a/s
Windows Forms
For a Windows Forms version (no console window and we don't get around to actually creating any forms - though you can if you want).
Compile line in a command prompt.
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe" /t:winexe "%userprofile%\desktop\VBS2Exe.vb"
Text for VBS2EXE.vb
Imports System.Windows.Forms
Partial Class MyForm : Inherits Form
Private Sub InitializeComponent()
End Sub
Public Sub New()
InitializeComponent()
End Sub
Public Shared Sub Main()
Dim sc as object
Dim Scrpt as string
sc = createObject("MSScriptControl.ScriptControl")
Scrpt = "msgbox " & chr(34) & "Hi there I'm a form" & chr(34)
With SC
.Language = "VBScript"
.UseSafeSubset = False
.AllowUI = True
End With
sc.addcode(Scrpt)
End Sub
End Class
Using these optional parameters gives you an icon and manifest. A manifest allows you to specify run as normal, run elevated if admin, only run elevated.
/win32icon: Specifies a Win32 icon file (.ico) for the default Win32 resources.
/win32manifest: The provided file is embedded in the manifest section of the output PE.
In theory, I have UAC off so can't test, but put this text file on the desktop and call it vbs2exe.manifest, save as UTF-8.
The command line
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe" /t:winexe /win32manifest:"%userprofile%\desktop\VBS2Exe.manifest" "%userprofile%\desktop\VBS2Exe.vb"
The manifest
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<assembly xmlns="urn:schemas-microsoft-com:asm.v1"
manifestVersion="1.0"> <assemblyIdentity version="1.0.0.0"
processorArchitecture="*" name="VBS2EXE" type="win32" />
<description>Script to Exe</description>
<trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
<security> <requestedPrivileges>
<requestedExecutionLevel level="requireAdministrator"
uiAccess="false" /> </requestedPrivileges>
</security> </trustInfo> </assembly>
Hopefully it will now ONLY run as admin.
Give Access To a Host's Objects
Here's an example giving the vbscript access to a .NET object.
Imports System.Windows.Forms
Partial Class MyForm : Inherits Form
Private Sub InitializeComponent()
End Sub
Public Sub New()
InitializeComponent()
End Sub
Public Shared Sub Main()
Dim sc as object
Dim Scrpt as string
sc = createObject("MSScriptControl.ScriptControl")
Scrpt = "msgbox " & chr(34) & "Hi there I'm a form" & chr(34) & ":msgbox meScript.state"
With SC
.Language = "VBScript"
.UseSafeSubset = False
.AllowUI = True
.addobject("meScript", SC, true)
End With
sc.addcode(Scrpt)
End Sub
End Class
To Embed version info
Download vbs2exe.res file from https://skydrive.live.com/redir?resid=E2F0CE17A268A4FA!121 and put on desktop.
Download ResHacker from http://www.angusj.com/resourcehacker
Open vbs2exe.res file in ResHacker. Edit away. Click Compile button. Click File menu - Save.
Type
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe" /t:winexe /win32manifest:"%userprofile%\desktop\VBS2Exe.manifest" /win32resource:"%userprofile%\desktop\VBS2Exe.res" "%userprofile%\desktop\VBS2Exe.vb"
No Jquery - No Third party js file
function clickComboBox(){_x000D_
comboOpt = document.getElementsByClassName("opt");_x000D_
for (i = 0; i < comboOpt.length; i++) {_x000D_
if (comboOpt[i].style.display === "block") {_x000D_
comboOpt[i].style.display = "none";_x000D_
} else {_x000D_
comboOpt[i].style.display = "block";_x000D_
}_x000D_
} _x000D_
}_x000D_
function clickOpt(value1,text1){_x000D_
document.getElementById("selectedValue").value=value1;_x000D_
document.getElementById("customComboBox").innerHTML=text1;_x000D_
clickComboBox();_x000D_
}
_x000D_
#customComboBox{_x000D_
width: 150px;_x000D_
height: 20px;_x000D_
border: 1px solid #CCCCCC;_x000D_
display: block;_x000D_
padding: 2px 5px;_x000D_
}_x000D_
.opt{_x000D_
padding: 5px 0px;background-color:#CCCCCC;_x000D_
width: 160px;_x000D_
display: none;_x000D_
}
_x000D_
<div id="customComboBox" onClick="clickComboBox()">_x000D_
-Select Value-_x000D_
</div>_x000D_
<input type="hidden" id="selectedValue">_x000D_
<div class="opt">_x000D_
<div onClick="clickOpt('01','Test1')"><img src="https://pasteboard.co/J6940Vs.png" height="20">Test1</div>_x000D_
<div style="padding-left:10px;" onClick="clickOpt('02','Test2')">Test2</div>_x000D_
<div onClick="clickOpt('03','Test3')">Test3</div>_x000D_
</div>
_x000D_
smart code - use jquery
Could anyone help explain why
In Python 2 a python "int" was equivalent to a C long. In Python 3 an "int" is an arbitrary precision type but numpy still uses "int" it to represent the C type "long" when creating arrays.
The size of a C long is platform dependent. On windows it is always 32-bit. On unix-like systems it is normally 32 bit on 32 bit systems and 64 bit on 64 bit systems.
or give a solution for the code on windows? Thanks so much!
Choose a data type whose size is not platform dependent. You can find the list at https://docs.scipy.org/doc/numpy/reference/arrays.scalars.html#arrays-scalars-built-in the most sensible choice would probably be np.int64
Based on Charles Clayton's answer, but slightly simplified...
' add item to array
Sub ArrayAdd(arr, val)
ReDim Preserve arr(UBound(arr) + 1)
arr(UBound(arr)) = val
End Sub
Used like so
a = Array()
AddItem(a, 5)
AddItem(a, "foo")
I ran into a similar issue and was able to get the checkbox value back by using a checkbox, hiddenfor and little JQuery like so:
@Html.CheckBox("isPreferred", Model.IsPreferred)
@Html.HiddenFor(m => m.IsPreferred)
<script>
$("#isPreferred").change(function () {
$("#IsPreferred").val($("#isPreferred").val());
})
</script>
Or you can put in the CSS,
<style>
div#img {
background-image: url(“file.png");
color:yellow (this part doesn't matter;
height:100%;
width:100%;
}
</style>
A classic "or" would be |
. For example, ab|de
would match either side of the expression.
However, for something like your case you might want to use the ?
quantifier, which will match the previous expression exactly 0 or 1 times (1 times preferred; i.e. it's a "greedy" match). Another (probably more relyable) alternative would be using a custom character group:
\d+\s+[A-Z\s]+\s+[A-Z][A-Za-z]+
This pattern will match:
\d+
: One or more numbers.\s+
: One or more whitespaces.[A-Z\s]+
: One or more uppercase characters or space characters\s+
: One or more whitespaces.[A-Z][A-Za-z\s]+
: An uppercase character followed by at least one more character (uppercase or lowercase) or whitespaces.If you'd like a more static check, e.g. indeed only match ABC
and A ABC
, then you can combine a (non-matching) group and define the alternatives inside (to limit the scope):
\d (?:ABC|A ABC) Street
Or another alternative using a quantifier:
\d (?:A )?ABC Street
The accepted answer correctly describes how the list should be declared and is highly recommended for most scenarios.
But I came across a different scenario, which also covers the question asked.
What if you have to use an existing object list, like ViewData["htmlAttributes"]
in MVC? How can you access its properties (they are usually created via new { @style="width: 100px", ... }
)?
For this slightly different scenario I want to share with you what I found out.
In the solutions below, I am assuming the following declaration for nodes
:
List<object> nodes = new List<object>();
nodes.Add(
new
{
Checked = false,
depth = 1,
id = "div_1"
});
In C# 4.0 and higher versions, you can simply cast to dynamic and write:
if (nodes.Any(n => ((dynamic)n).Checked == false))
Console.WriteLine("found a not checked element!");
Note: This is using late binding, which means it will recognize only at runtime if the object doesn't have a Checked
property and throws a RuntimeBinderException
in this case - so if you try to use a non-existing Checked2
property you would get the following message at runtime: "'<>f__AnonymousType0<bool,int,string>' does not contain a definition for 'Checked2'"
.
The solution with reflection works both with old and new C# compiler versions. For old C# versions please regard the hint at the end of this answer.
Background
As a starting point, I found a good answer here. The idea is to convert the anonymous data type into a dictionary by using reflection. The dictionary makes it easy to access the properties, since their names are stored as keys (you can access them like myDict["myProperty"]
).
Inspired by the code in the link above, I created an extension class providing GetProp
, UnanonymizeProperties
and UnanonymizeListItems
as extension methods, which simplify access to anonymous properties. With this class you can simply do the query as follows:
if (nodes.UnanonymizeListItems().Any(n => (bool)n["Checked"] == false))
{
Console.WriteLine("found a not checked element!");
}
or you can use the expression nodes.UnanonymizeListItems(x => (bool)x["Checked"] == false).Any()
as if
condition, which filters implicitly and then checks if there are any elements returned.
To get the first object containing "Checked" property and return its property "depth", you can use:
var depth = nodes.UnanonymizeListItems()
?.FirstOrDefault(n => n.Contains("Checked")).GetProp("depth");
or shorter: nodes.UnanonymizeListItems()?.FirstOrDefault(n => n.Contains("Checked"))?["depth"];
Note: If you have a list of objects which don't necessarily contain all properties (for example, some do not contain the "Checked" property), and you still want to build up a query based on "Checked" values, you can do this:
if (nodes.UnanonymizeListItems(x => { var y = ((bool?)x.GetProp("Checked", true));
return y.HasValue && y.Value == false;}).Any())
{
Console.WriteLine("found a not checked element!");
}
This prevents, that a KeyNotFoundException
occurs if the "Checked" property does not exist.
The class below contains the following extension methods:
UnanonymizeProperties
: Is used to de-anonymize the properties contained in an object. This method uses reflection. It converts the object into a dictionary containing the properties and its values.UnanonymizeListItems
: Is used to convert a list of objects into a list of dictionaries containing the properties. It may optionally contain a lambda expression to filter beforehand.GetProp
: Is used to return a single value matching the given property name. Allows to treat not-existing properties as null values (true) rather than as KeyNotFoundException (false)For the examples above, all that is required is that you add the extension class below:
public static class AnonymousTypeExtensions
{
// makes properties of object accessible
public static IDictionary UnanonymizeProperties(this object obj)
{
Type type = obj?.GetType();
var properties = type?.GetProperties()
?.Select(n => n.Name)
?.ToDictionary(k => k, k => type.GetProperty(k).GetValue(obj, null));
return properties;
}
// converts object list into list of properties that meet the filterCriteria
public static List<IDictionary> UnanonymizeListItems(this List<object> objectList,
Func<IDictionary<string, object>, bool> filterCriteria=default)
{
var accessibleList = new List<IDictionary>();
foreach (object obj in objectList)
{
var props = obj.UnanonymizeProperties();
if (filterCriteria == default
|| filterCriteria((IDictionary<string, object>)props) == true)
{ accessibleList.Add(props); }
}
return accessibleList;
}
// returns specific property, i.e. obj.GetProp(propertyName)
// requires prior usage of AccessListItems and selection of one element, because
// object needs to be a IDictionary<string, object>
public static object GetProp(this object obj, string propertyName,
bool treatNotFoundAsNull = false)
{
try
{
return ((System.Collections.Generic.IDictionary<string, object>)obj)
?[propertyName];
}
catch (KeyNotFoundException)
{
if (treatNotFoundAsNull) return default(object); else throw;
}
}
}
Hint: The code above is using the null-conditional operators, available since C# version 6.0 - if you're working with older C# compilers (e.g. C# 3.0), simply replace ?.
by .
and ?[
by [
everywhere (and do the null-handling traditionally by using if
statements or catch NullReferenceExceptions), e.g.
var depth = nodes.UnanonymizeListItems()
.FirstOrDefault(n => n.Contains("Checked"))["depth"];
As you can see, the null-handling without the null-conditional operators would be cumbersome here, because everywhere you removed them you have to add a null check - or use catch statements where it is not so easy to find the root cause of the exception resulting in much more - and hard to read - code.
If you're not forced to use an older C# compiler, keep it as is, because using null-conditionals makes null handling much easier.
Note: Like the other solution with dynamic, this solution is also using late binding, but in this case you're not getting an exception - it will simply not find the element if you're referring to a non-existing property, as long as you keep the null-conditional operators.
What might be useful for some applications is that the property is referred to via a string in solution 2, hence it can be parameterized.
You should pass the event object when calling the function :
{<td><span onClick={(e) => this.toggle(e)}>Details</span></td>}
If you don't need to handle onClick event you can also type :
{<td><span onClick={(e) => this.toggle()}>Details</span></td>}
Now you can also add your parameters within the function.
If you type this command:
echo cd d:/some/path >> ~/.bashrc
Appends the line cd d:/some/path
to .bashrc
. The >>
creates a file if it doesn’t exist and then appends.
This error may occurs in the case you use un-defined prefix such as:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TabHost
XYZ:id="@android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
</TabHost>
Android compiler does not know what is XYZ since it was not defined yet.
In your case, you should add below define to root node of the xml file.
xmlns:android="http://schemas.android.com/apk/res/android"
Try this:
HTML:
<div id="container">
<div id="content">
// Content here
</div>
</div>
CSS:
#container{
height: 100%;
width: 100%;
overflow: hidden;
}
#content{
width: 100%;
height: 99%;
overflow: auto;
padding-right: 15px;
}
html, body{
height: 99%;
overflow:hidden;
}
Tested on FF and Safari.
you can use this code in your css file:
-webkit-top:9px;
-moz-top:7px;
top:5px;
the code -webkit-top:9px; is for chrome, -moz-top:7px is for mozilla and the last one is for IE. Have Fun!!!
Set the buildToolsVersion '26.0.2'
then change classpath 'com.android.tools.build:gradle:3.0.1'
.
Make sure you set compileSdkVersion
to 26
whiles targetSdkVersion
is also set 26
.
It is also appropriate to sent set compile 'com.android.support:appcompat-v7:26.0.2'
.
If you are using SQL Server 2012, 2014 or newer, use the Format Function instead:
select Format( decimalColumnName ,'FormatString','en-US' )
Review the Microsoft topic and .NET format syntax for how to define the format string.
An example for this question would be:
select Format( MyDecimalColumn ,'N','en-US' )
If you don't need to preserve any of the outputs you already successfully compiled
nmake /A
rebuilds all
function in_multi_array($needle, $key, $haystack)
{
$in_multi_array = false;
if (in_array($needle, $haystack))
{
$in_multi_array = true;
}else
{
foreach( $haystack as $key1 => $val )
{
if(is_array($val))
{
if($this->in_multi_array($needle, $key, $val))
{
$in_multi_array = true;
break;
}
}
}
}
return $in_multi_array;
}
I made a few changes to aioobe's answer and got a nth lastIndexOf version, and fix some NPE problems. See code below:
public int nthLastIndexOf(String str, char c, int n) {
if (str == null || n < 1)
return -1;
int pos = str.length();
while (n-- > 0 && pos != -1)
pos = str.lastIndexOf(c, pos - 1);
return pos;
}
You can define a Multi-module project structure, then you can set the configuration for sonar in one properties file in the root folder of your project, (Way #1
)
http://jsfiddle.net/LRD5x/30/ A simple solution.
HTML
<form ng-submit="sendForm($event)" ng-class={submitted:submitted}>
JS
$scope.sendForm = function($event) {
$event.preventDefault()
$scope.submitted = true
};
CSS
.submitted input.ng-invalid:not(:focus) {
background-color: #FA787E;
}
input.ng-invalid ~ .alert{
display:none;
}
.submitted input.ng-invalid ~ .alert{
display:block;
}
I created a fully automated solution to add PS and CMD context items. Just run set_registry.cmd and it will update registry to add two buttons when click RMB on folder or inside some opened folder:
This will change owner of registry keys to admin and add context menus
Change registry to enable PS and CWD context menus
I found that when I create Sqlconnection = new SqlConnection()
,
I forgot to pass my connectionString
variable. So that is why I changed the way I initialize my connectionString
(and nothing changed).
And if you like me just don't forget to pass your string connection into SqlConnection
parameters.
Sqlconnection = new SqlConnection("ConnString")
Add each line of the code to a variable and then write the variable to your inner HTML. See below:
var div = document.createElement('div');
div.setAttribute('class', 'post block bc2');
var str = "First Line";
str += "Second Line";
str += "So on, all of your lines";
div.innerHTML = str;
document.getElementById('posts').appendChild(div);
Please note that the problem is not white
color. It is because it is being transparent.
When an element is made transparent, all of its child element's opacity; alpha filter in IE 6 7 etc, is changed to the new value.
So you cannot say that it is white!
You can place an element above it, and change that element's transparency to 1
while changing the image's transparency to .2
or what so ever you want to.
In general, these answer the question: How to change your user settings file? But the question I wanted answered was how to change my local maven repository location. The answer is that you have to edit settings.xml. If the file does not exist, you have to create it. You set or change the location of the file at Window > Preferences > Maven > User Settings. It's the User Settings entry at
It's the second file input; the first with information in it.
If it's not clear, [redacted]
should be replaced with the local file path to your .m2 folder.
If you click the "open file" link, it opens the settings.xml file for editing in Eclipse.
If you have no settings.xml file yet, the following will set the local repository to the Windows 10 default value for a user named mdfst13:
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
https://maven.apache.org/xsd/settings-1.0.0.xsd">
<localRepository>C:\Users\mdfst13\.m2\repository</localRepository>
</settings>
You should set this to a value appropriate to your system. I haven't tested it, but I suspect that in Linux, the default value would be /home/mdfst13/.m2/repository
. And of course, you probably don't want to set it to the default value. If you are reading this, you probably want to set it to some other value. You could just delete it if you wanted the default.
Credit to this comment by @ejaenv for the name of the element in the settings file: <localRepository>
. See Maven — Settings Reference for more information.
Credit to @Ajinkya's answer for specifying the location of the User Settings value in Eclipse Photon.
If you already have a settings.xml file, you should merge this into your existing file. I.e. <settings
and <localRepository>
should only appear once in the file, and you probably want to retain any settings already there. Or to say that another way, edit any existing local repository entry if it exists or just add that line to the file if it doesn't.
I had to restart Eclipse for it to load data into the new repository. Neither "Update Settings" nor "Reindex" was sufficient.
You have to start a service in your Application class to run it always. If you do that, your service will be always running. Even though user terminates your app from task manager or force stop your app, it will start running again.
Create a service:
public class YourService extends Service {
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// do your jobs here
return super.onStartCommand(intent, flags, startId);
}
}
Create an Application class and start your service:
public class App extends Application {
@Override
public void onCreate() {
super.onCreate();
startService(new Intent(this, YourService.class));
}
}
Add "name" attribute into the "application" tag of your AndroidManifest.xml
android:name=".App"
Also, don't forget to add your service in the "application" tag of your AndroidManifest.xml
<service android:name=".YourService"/>
And also this permission request in the "manifest" tag (if API level 28 or higher):
<uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
UPDATE
After Android Oreo, Google introduced some background limitations. Therefore, this solution above won't work probably. When a user kills your app from task manager, Android System will kill your service as well. If you want to run a service which is always alive in the background. You have to run a foreground service with showing an ongoing notification. So, edit your service like below.
public class YourService extends Service {
private static final int NOTIF_ID = 1;
private static final String NOTIF_CHANNEL_ID = "Channel_Id";
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId){
// do your jobs here
startForeground();
return super.onStartCommand(intent, flags, startId);
}
private void startForeground() {
Intent notificationIntent = new Intent(this, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
notificationIntent, 0);
startForeground(NOTIF_ID, new NotificationCompat.Builder(this,
NOTIF_CHANNEL_ID) // don't forget create a notification channel first
.setOngoing(true)
.setSmallIcon(R.drawable.ic_notification)
.setContentTitle(getString(R.string.app_name))
.setContentText("Service is running background")
.setContentIntent(pendingIntent)
.build());
}
}
EDIT: RESTRICTED OEMS
Unfortunately, some OEMs (Xiaomi, OnePlus, Samsung, Huawei etc.) restrict background operations due to provide longer battery life. There is no proper solution for these OEMs. Users need to allow some special permissions that are specific for OEMs or they need to add your app into whitelisted app list by device settings. You can find more detail information from https://dontkillmyapp.com/.
If background operations are an obligation for you, you need to explain it to your users why your feature is not working and how they can enable your feature by allowing those permissions. I suggest you to use AutoStarter library (https://github.com/judemanutd/AutoStarter) in order to redirect your users regarding permissions page easily from your app.
By the way, if you need to run some periodic work instead of having continuous background job. You better take a look WorkManager (https://developer.android.com/topic/libraries/architecture/workmanager)
Another way with python 3 (If someone is searching):
import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.base import MIMEBase
from email import encoders
fromaddr = "sender mail address"
toaddr = "receiver mail address"
msg = MIMEMultipart()
msg['From'] = fromaddr
msg['To'] = toaddr
msg['Subject'] = "SUBJECT OF THE EMAIL"
body = "TEXT YOU WANT TO SEND"
msg.attach(MIMEText(body, 'plain'))
filename = "fileName"
attachment = open("path of file", "rb")
part = MIMEBase('application', 'octet-stream')
part.set_payload((attachment).read())
encoders.encode_base64(part)
part.add_header('Content-Disposition', "attachment; filename= %s" % filename)
msg.attach(part)
server = smtplib.SMTP('smtp.gmail.com', 587)
server.starttls()
server.login(fromaddr, "sender mail password")
text = msg.as_string()
server.sendmail(fromaddr, toaddr, text)
server.quit()
Make sure to allow “less secure apps” on your Gmail account
Use array_unique().
Example:
$array = array(1, 2, 2, 3);
$array = array_unique($array); // Array is now (1, 2, 3)
I'm appending this answer because I don't see why anyone who has just tried to commit work would want to delete all that work because of some mistake using Git!
If you want to keep your work and just 'undo' that commit command (you caught before pushing to repo):
git reset --soft HEAD~1
Do not use the --hard flag unless you want to destroy your work in progress since the last commit.
For my case gulp-ignore was perfect. As option you may pass a function there:
function condition(file) {
// do whatever with file.path
// return boolean true if needed to exclude file
}
And the task would look like this:
var gulpIgnore = require('gulp-ignore');
gulp.task('task', function() {
gulp.src('./**/*.js')
.pipe(gulpIgnore.exclude(condition))
.pipe(gulp.dest('./dist/'));
});
This can be an efficient way of performing different tests on a single statement
select
case colour_txt
when 'red' then 5
when 'green' then 4
when 'orange' then 3
else 0
end as Pass_Flag
this only works on equality comparisons!
Use this code, Working properly
CREATE PROCEDURE [dbo].[sp_delete_item]
@ItemId int = 0
@status bit OUT
AS
Begin
DECLARE @cnt int;
DECLARE @status int =0;
SET NOCOUNT OFF
SELECT @cnt =COUNT(Id) from ItemTransaction where ItemId = @ItemId
if(@cnt = 1)
Begin
return @status;
End
else
Begin
SET @status =1;
return @status;
End
END
Execute SP
DECLARE @statuss bit;
EXECUTE [dbo].[sp_delete_item] 6, @statuss output;
PRINT @statuss;
Asynchronous programming is slightly more complicated because the consequence of making a request is encapsulated in a function instead of following the request statement. But the realtime behavior that the user experiences can be significantly better because they will not see a sluggish server or sluggish network cause the browser to act as though it had crashed. Synchronous programming is disrespectful and should not be employed in applications which are used by people.
Douglas Crockford (YUI Blog)
Alright, buckle your seats, because it's going to be a bumpy ride. More and more people ask about loading scripts dynamically via javascript, it seems to be a hot topic.
The main reasons why this became so popular are:
About modularity: it is obvious that managing client-side dependencies should be handled right on the client-side. If a certain object, module or library is needed we just ask for it and load it dynamically.
Error handling: if a resource fails we still get the chance to block only the parts that depend on the affected script, or maybe even give it another try with some delay.
Performance has become a competitive edge between websites, it is now a search ranking factor. What dynamic scripts can do is mimic asynchronous behavior as opposed to the default blocking way of how browsers handle scripts. Scripts block other resources, scripts block further parsing of the HTML document, scripts block the UI. Now with dynamic script tags and its cross-browser alternatives you can do real asynchronous requests, and execute dependent code only when they are available. Your scripts will load in-parallel even with other resources and the rendering will be flawless.
The reason why some people stick to synchronous scripting is because they are used to it. They think it is the default way, it is the easier way, and some may even think it is the only way.
But the only thing we should care about when this needs to be decided concerning an applications's design is the end-user experience. And in this area asynchronous cannot be beaten. The user gets immediate responses (or say promises), and a promise is always better than nothing. A blank screen scares people. Developers shouldn't be lazy to enhance perceived performance.
And finally some words about the dirty side. What you should do in order to get it working across browsers:
You can use LINQ-to-DataSet
with Enumerable.Any
:
String author = "John Grisham";
bool contains = tbl.AsEnumerable().Any(row => author == row.Field<String>("Author"));
Another approach is to use DataTable.Select
:
DataRow[] foundAuthors = tbl.Select("Author = '" + searchAuthor + "'");
if(foundAuthors.Length != 0)
{
// do something...
}
Q: what if we do not know the columns Headers and we want to find if any cell value
PEPSI
exist in any rows'c columns? I can loop it all to find out but is there a better way? –
Yes, you can use this query:
DataColumn[] columns = tbl.Columns.Cast<DataColumn>().ToArray();
bool anyFieldContainsPepsi = tbl.AsEnumerable()
.Any(row => columns.Any(col => row[col].ToString() == "PEPSI"));
If you had python 2.x and then installed python3, your pip will be pointing to pip3.
you can verify that by typing pip --version
which would be the same as pip3 --version
.
On your system you have now pip, pip2 and pip3.
If you want you can change pip to point to pip2 instead of pip3.
You can get the id of clicked one by this code
$("span").on("click",function(e){
console.log(e.target.Id);
});
Use .on()
event for future compatibility
You can do like this:
Sub Get_Environmental_Variable()
Dim sHostName As String
Dim sUserName As String
' Get Host Name / Get Computer Name
sHostName = Environ$("computername")
' Get Current User Name
sUserName = Environ$("username")
End Sub
Try this:
apt-get install lib32stdc++6
Selected response is correct, but someone like me, may have issues with async validation with sending request to the server-side - button will be not disabled during given request processing, so button will blink, which looks pretty strange for the users.
To void this, you just need to handle $pending state of the form:
<form name="myForm">
<input name="myText" type="text" ng-model="mytext" required />
<button ng-disabled="myForm.$invalid || myForm.$pending">Save</button>
</form>
For XAMPP, do the following steps:
G:\xampp\apache\conf\extra\httpd-ssl.conf"
Search 'DocumentRoot' text.
Change DocumentRoot DocumentRoot "G:/xampp/htdocs" to DocumentRoot "G:/xampp/htdocs/project name".
try this :
@Html.DropDownList("Sortby", new SelectListItem[] { new SelectListItem()
{ Text = "Newest to Oldest", Value = "0" }, new SelectListItem()
{ Text = "Oldest to Newest", Value = "1" }},
new { onchange = "document.location.href = '/ControllerName/ActionName?id=' + this.options[this.selectedIndex].value;" })
GitHub Repositories are used to store all the files, folders and other resources which you care about.
Git Project : It is also one of the Resource in Git Repository and main use of it is to manage the projects with a visual board. If you create a project in Git Repository it create a visual board like a Kanban board to manage the project.
In this way, you can have multiple projects in a repository.
i found this in procmail package dependencies:
apt install liblockfile-bin
To run:
dotlockfile -l file.lock
file.lock will be created.
To unlock:
dotlockfile -u file.lock
Use this to list this package files / command:
dpkg-query -L liblockfile-bin
C does not have its own String data type like Java.
Only we can declare String datatype in C using character array or character pointer For example :
char message[10];
or
char *message;
But you need to declare at least:
char message[14];
to copy "Hello, world!" into message variable.
As an extension to John Galt's answer -
For the following DataFrame,
customer item1 item2 item3
0 1 apple milk tomato
1 2 water orange potato
2 3 juice mango chips
If you want to get a list of dictionaries including the index values, you can do something like,
df.to_dict('index')
Which outputs a dictionary of dictionaries where keys of the parent dictionary are index values. In this particular case,
{0: {'customer': 1, 'item1': 'apple', 'item2': 'milk', 'item3': 'tomato'},
1: {'customer': 2, 'item1': 'water', 'item2': 'orange', 'item3': 'potato'},
2: {'customer': 3, 'item1': 'juice', 'item2': 'mango', 'item3': 'chips'}}
Perhaps what you're looking for is the SVG element's pointer-events property, which you can read about at the SVG w3C working group docs.
You can use CSS to set what happens to the SVG element when it is clicked, etc.
in my vue
project i fixed this problem like this :
vim package.json
...
"rules": {
"no-console": "off"
},
...
ps : package.json is a configfile in the vue project dir, finally the content shown like this:
{
"name": "metadata-front",
"version": "0.1.0",
"private": true,
"scripts": {
"serve": "vue-cli-service serve",
"build": "vue-cli-service build",
"lint": "vue-cli-service lint"
},
"dependencies": {
"axios": "^0.18.0",
"vue": "^2.5.17",
"vue-router": "^3.0.2"
},
"devDependencies": {
"@vue/cli-plugin-babel": "^3.0.4",
"@vue/cli-plugin-eslint": "^3.0.4",
"@vue/cli-service": "^3.0.4",
"babel-eslint": "^10.0.1",
"eslint": "^5.8.0",
"eslint-plugin-vue": "^5.0.0-0",
"vue-template-compiler": "^2.5.17"
},
"eslintConfig": {
"root": true,
"env": {
"node": true
},
"extends": [
"plugin:vue/essential",
"eslint:recommended"
],
"rules": {
"no-console": "off"
},
"parserOptions": {
"parser": "babel-eslint"
}
},
"postcss": {
"plugins": {
"autoprefixer": {}
}
},
"browserslist": [
"> 1%",
"last 2 versions",
"not ie <= 8"
]
}
I ran into a very similar problem with my Xamarin Windows Phone 8.1 app. The reason JObject.Parse(json) would not work for me was because my Json had a beginning "[" and an ending "]". In order to make it work, I had to remove those two characters. From your example, it looks like you might have the same issue.
jsonResult = jsonResult.TrimStart(new char[] { '[' }).TrimEnd(new char[] { ']' });
I was then able to use the JObject.Parse(jsonResult) and everything worked.
Variables declared inside a function are local to that function. For instance:
foo <- function() {
bar <- 1
}
foo()
bar
gives the following error: Error: object 'bar' not found
.
If you want to make bar
a global variable, you should do:
foo <- function() {
bar <<- 1
}
foo()
bar
In this case bar
is accessible from outside the function.
However, unlike C, C++ or many other languages, brackets do not determine the scope of variables. For instance, in the following code snippet:
if (x > 10) {
y <- 0
}
else {
y <- 1
}
y
remains accessible after the if-else
statement.
As you well say, you can also create nested environments. You can have a look at these two links for understanding how to use them:
Here you have a small example:
test.env <- new.env()
assign('var', 100, envir=test.env)
# or simply
test.env$var <- 100
get('var') # var cannot be found since it is not defined in this environment
get('var', envir=test.env) # now it can be found
If using adb devices on Mac OS X no device is displayed and, of course, you have enabled the USB debugging on your device (see http://developer.android.com/tools/device.html), then try with:
$ android update adb
adb has been updated. You must restart adb with the following commands
adb kill-server
adb start-server
Then:
$ adb kill-server
$ adb start-server
* daemon not running. starting it now on port ... *
* daemon started successfully *
And finally:
$ adb devices
List of devices attached
...... device
Your device should be now in the list.
In matplotlib 3.1, you can also use ticklabel_format. To prevents scientific notation without offsets:
plt.gca().ticklabel_format(axis='both', style='plain', useOffset=False)
you can just use
ls > filenames.txt
(usually, start a shell by using "Terminal", or "shell", or "Bash".) You may need to use cd
to go to that folder first, or you can ls ~/docs > filenames.txt
Other than syntax, a switch can be implemented using a tree which makes it O(log n)
, while a if/else has to be implemented with an O(n)
procedural approach. More often they are both processed procedurally and the only difference is syntax, and moreover does it really matter -- unless you're statically typing 10k cases of if/else anyway?
let label = UILabel(frame: CGRect(x: 0, y: 0, width: 200, height: 21))
label.center = CGPoint(x: 160, y: 285)
label.textAlignment = .center
label.text = "My label"
self.view.addSubview(label)
Try above code in ViewDidLoad
In HTML:
<button type="button" id="AddButton" onclick="AddButtonClick()" class="btn btn-success btn-block ">Add</button>
In Jquery write this function:
function AddButtonClick(){
//change text from add to Update
$("#AddButton").text('Update');
}
Another way is to use an array as a type, e.g.:
MyClass[] mcArray = gson.fromJson(jsonString, MyClass[].class);
This way you avoid all the hassle with the Type object, and if you really need a list you can always convert the array to a list by:
List<MyClass> mcList = Arrays.asList(mcArray);
IMHO this is much more readable.
And to make it be an actual list (that can be modified, see limitations of Arrays.asList()
) then just do the following:
List<MyClass> mcList = new ArrayList<>(Arrays.asList(mcArray));
The following tools can be useful during development:
Access Token Debugger: Paste in an access token for details
https://developers.facebook.com/tools/debug/accesstoken/
Graph API Explorer: Test requests to the graph api after pasting in your access token
Android Documentation on Manifest.permission.Manifest.permission.WRITE_EXTERNAL_STORAGE states:
Starting in API level 19, this permission is not required to read/write files in your application-specific directories returned by getExternalFilesDir(String) and getExternalCacheDir().
I think that this means you do not have to code for the run-time implementation of the WRITE_EXTERNAL_STORAGE permission unless the app is writing to a directory that is not specific to your app.
You can define the max sdk version in the manifest per permission like:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" android:maxSdkVersion="19" />
Also make sure to change the target SDK in the build.graddle and not the manifest, the gradle settings will always overwrite the manifest settings.
android {
compileSdkVersion 23
buildToolsVersion '23.0.1'
defaultConfig {
minSdkVersion 17
targetSdkVersion 22
}