Tutorial by Examples: ev

Mysql has its EVENT functionality for avoiding complicated cron interactions when much of what you are scheduling is SQL related, and less file related. See the Manual page here. Think of Events as Stored Procedures that are scheduled to run on recurring intervals. To save time in debugging Event-r...

Icicle uses Awaitables and Generators to create Coroutines. require __DIR__ . '/vendor/autoload.php'; use Icicle\Awaitable; use Icicle\Coroutine\Coroutine; use Icicle\Loop; $generator = function (float $time) { try { // Sets $start to the value returned by microtime() after ap...

Check screencast video on YouTube about this feature IntelliJ provides a quick-preview feature called Viewing Definition. Using this feature allows a user to quickly see the contents of a method/class without navigating into the class itself OS X - (⌘+Y) or (⌥+Space) Unix / Windows - Ctrl+Shif...

Suppose, that we have three users : The Administrator of the database > admin The application with a full access for her data > read_write The read only access > read_only --ACCESS DB REVOKE CONNECT ON DATABASE nova FROM PUBLIC; GRANT CONNECT ON DATABASE nova TO user; With th...

You can also perform this task recursively, but I have chosen in this example to use an iterative approach. This task is useful if you are inserting all of your nodes at the beginning of a linked list. Here is an example: #include <stdio.h> #include <stdlib.h> #define NUM_ITEMS 10...

If you need to send events from fragment to activity, one of the possible solutions is to define callback interface and require that the host activity implement it. Example Send callback to an activity, when fragment's button clicked First of all, define callback interface: public interface Samp...

Amp harnesses Promises [another name for Awaitables] and Generators for coroutine creation. require __DIR__ . '/vendor/autoload.php'; use Amp\Dns; // Try our system defined resolver or googles, whichever is fastest function queryStackOverflow($recordtype) { $requests = [ Dns\qu...

Of the LINQ methods which use deferred execution, some require a single value to be evaluated at a time. The following code: var lst = new List<int>() {3, 5, 1, 2}; var streamingQuery = lst.Select(x => { Console.WriteLine(x); return x; }); foreach (var i in streamingQuery) { ...

Let's say we want to change main loop, only for specific taxonomy, or post type. Targeting only main loop on book post type archive page. add_action( 'pre_get_posts', 'my_callback_function' ); function my_callback_function( $query ) { if( !$query->is_main_query() || is_admin() ) return;...

When a single parameter is passed to the .attr() function it returns the value of passed attribute on the selected element. Syntax: $([selector]).attr([attribute name]); Example: HTML: <a href="/home">Home</a> jQuery: $('a').attr('href'); Fetching data attributes: jQue...

#include <stdio.h> #include <threads.h> #include <stdlib.h> struct my_thread_data { double factor; }; int my_thread_func(void* a) { struct my_thread_data* d = a; // do something with d printf("we found %g\n", d->factor); // return an succes...

Like normal HTML elements, it is possible for $scopes to have their own events. $scope events can be subscribed to using the following manner: $scope.$on('my-event', function(event, args) { console.log(args); // { custom: 'data' } }); If you need unregister an event listener, the $on func...

Server Syntax var io = require('socket.io')(80); io.on('connection', function (mysocket) { //custom event called `private message` mysocket.on('private message', function (from, msg) { console.log('I received a private message by ', from, ' saying ', msg); }); //internal `di...

stri_paste(LETTERS,"-", 1:13) # [1] "A-1" "B-2" "C-3" "D-4" "E-5" "F-6" "G-7" "H-8" "I-9" "J-10" "K-11" "L-12" "M-13" # [14] "N-1" "...

The example below will collect the Device's OS version number and the the version of the application (which is defined in each projects' properties) that is entered into Version name on Android and Version on iOS. First make an interface in your PCL project: public interface INativeHelper { /...

When a query goes wrong, it is important to fetch the error message(s) returned by the driver to identify the cause of the problem. The syntax is: sqlsrv_errors([int $errorsOrWarnings]); This returns an array with: KeyDescriptionSQLSTATEThe state that the SQL Server / OBDC Driver is incodeThe S...

The variable command ensures that a given namespace variable is created. Until a value is assigned to it, the variable's value is undefined: namespace eval mynamespace { variable alpha set alpha 0 } The variable can be accessed from outside the namespace (from anywhere, in fact) by at...

The Gradle team works regularly on improving the performance of different aspects of Gradle builds. If you’re using an old version of Gradle, you’re missing out on the benefits of that work. Try upgrading to the latest version of Gradle to see what kind of impact it has. Doing so is low risk because...

Anything that needs to happen with data in an IndexedDB database happens in a transaction. There are a few things to note about transactions that are mentioned in the Remarks section at the bottom of this page. We'll use the database we set up in Opening a database. // Create a new transaction, we...

Open Android Device Monitor ( ie C:<ANDROID_SDK_LOCATION>\tools\monitor.bat) Select your device Click on Screen Capture Button