Tutorial by Examples: o

The RelayCommand implements the ICommand interface and can therefore be used to bind to Commands in XAML (as the Command property of the Button element) The constructor takes two arguments; the first is an Action which will be executed if ICommand.Execute is called (e.g. the user clicks on the butt...

The RelayCommand<T> is similar to the RelayCommand, but allows to directly pass an object to the command. It implements the ICommand interface and can therefore be used to bind to Commands in XAML (e.g. as the Command property of the Button element). You can then use the CommandParameter prope...

The ObservableObject class contains some helpful methods to help with the MVVM pattern. The RaisePropertyChanged provides a compile safe method to raise property changed events. It can be called with RaisePropertyChanged(() => MyProperty); The Set method can be used in the property setter t...

ViewModelBase extends ObservableObject and adds some methods useful for viewmodels. The property IsInDesignMode or IsInDesignModeStatic allows to determine if the code is executed in the design mode (in Visual Studio Design View) or not. The two properties are exactly the same.

An observeEvent object can be used to trigger a piece of code when a certain event occurs. It is constructed as: observeEvent( event { code to run }) The observeEvent will only be dependent on the 'event' section in the small piece of code above. It will not be dependent on anything in the 'co...

CMocka is an elegant unit testing framework for C with support for mock objects. It only requires the standard C library, works on a range of computing platforms (including embedded) and with different compilers. It has a tutorial on testing with mocks, API documentation, and a variety of examples. ...

Valgrind is GPLv2-licensed collection of dynamic analysis tools, which uses binary instrumentation (dynamic recompilation). Six tools are included to detect memory management (Memcheck) and threading errors (Helgrind and DRD), to generate call-graph and profile programs (with optional cache and bran...

One can use the command-line launching facility is when one wants to customize some aspects of the way MySQL Workbench operates. MySQL Workbench has the following common command line options: --admin instance - Launch MySQL Workbench and load the server instance specified. --query connection - ...

/app/i18n/<Vendor Namespace>/<language package directory>/composer.json { "name": "<vendor namespance>/<language package directory>", "description": "<language package description>", "version": "100....

An observe expression is triggered every time one of its inputs changes. The major difference with regards to a reactive expression is that it yields no output, and it should only be used for its side effects (such as modifying a reactiveValues object, or triggering a pop-up). Also, note that obser...

Here i will show you how to fetch All parent(configuarble products) A parent product and all of its children.

We will start by making a simple class that gets all our parent(Configurable products) <?php namespace Test\Test\Controller\Test; use Magento\Framework\App\Action\Context; class Products extends \Magento\Framework\App\Action\Action { public function __construct( \...

Here we first fetch our parent product and the we will get all children products that this parent have. <?php namespace Test\Test\Controller\Test; use Magento\Framework\App\Action\Context; class Products extends \Magento\Framework\App\Action\Action { public function __cons...

Variables inside functions is inside a local scope like this $number = 5 function foo(){ $number = 10 return $number } foo(); //Will print 10 because text defined inside function is a local variable

val re = """\((.*?)\)""".r val str = "(The)(example)(of)(repeating)(pattern)(in)(a)(single)(string)(I)(had)(some)(trouble)(with)(once)" re.findAllMatchIn(str).map(_.group(1)).toList res2: List[String] = List(The, example, of, repeating, pattern, in, a, ...

Using DOSKEY, we can create macros to simplify typing many commands in command prompt. Take a look at the following example. DOSKEY macro=echo Hello World Now if you type macro in the command prompt, it would return Hello World.

Unfortunately, DOSKEY macro doesn't support comment, but there's a workaround. ;= Comment ;= Comment ;= Remember to end your comment with ;= ;=

class AppDelegate: UIResponder, UIApplicationDelegate { var window: UIWindow? var firstTabNavigationController : UINavigationController! var secondTabNavigationControoller : UINavigationController! var thirdTabNavigationController : UINavigationController! var fourth...

Sometimes the download takes longer than the cell is being displayed. In this case it can happen, that the downloaded image is shown in the wrong cell. To fix this we can not use the UIImageView Extension. We still will be using Alamofire however we will use the completion handler to display the im...

Use .outerHTML to get the HTML Here is a code sample to get the entire HTML of the website private async void GetHTMLAsync() { var siteHtML = await webView.InvokeScriptAsync("eval", new string[] { "document.documentElement.outerHTML;" }); }