Tutorial by Examples: l

Types used in Sets and Dictionaries(key) must conform to Hashable protocol which inherits from Equatable protocol. Custom type conforming to Hashable protocol must implement A calculated property hashValue Define one of the equality operators i.e. == or !=. Following example implements Hasha...

Create a basic application with single view application template with swift as language Add SWRevealViewController.h and SWRevealViewController.m then click on Create Bridging Header button and add #import "SWRevealViewController.h" on the Bridging header Then select viewControll...

LINQ provides a method that makes it easy to create a collection filled with sequential numbers. For example, you can declare an array which contains the integers between 1 and 100. The Enumerable.Range method allows us to create sequence of integer numbers from a specified start position and a num...

When we want to change root password in windows, We need to follow following steps : Step 1 : Start your Command Prompt by using any of below method : Perss Crtl+R or Goto Start Menu > Run and then type cmd and hit enter Step 2 : Change your directory to where MYSQL is installed, In my case i...

In your command line, get in the directory you want to create the project in, then type: composer create-project zendframework/skeleton-application helloWorldTest. During installation, you will be asked if you want a minimal install: Let's say yes for the moment, we are just testing. For simplicity...

It's a good practice to cache loaded result to avoid multiple loading of same data. To invalidate cache onContentChanged() should be called. If loader has been already started, forceLoad() will be called, otherwise (if loader in stopped state) loader will be able to understand content change with ta...

Suppose you have a collection elements, and you want to create another collection containing the same elements but with all duplicates eliminated: Collection<Type> noDuplicates = new HashSet<Type>(elements); Example: List<String> names = new ArrayList<>( Arrays....

Let's see MVP in action using a simple Login Screen. There are two Buttons—one for login action and another for a registration screen; two EditTexts—one for the email and the other for the password. LoginFragment (The View) public class LoginFragment extends Fragment implements LoginContract.Prese...

The JAXB Reference Implementation (JAXB-RI) has been included with the Java Development Kit since JDK 6 update 3. Refer to the Unofficial JAXB Guide for additional details on which JAXB-RI version is included with specific versions of the JDK.

// First load a collection object foreach($collection as $product) { $product->getSku(); $product->getName(); // Alternative method $product->getData('sku'); $product->getData('name'); }

Initialize the UITextField with a CGRect as a frame: Swift let textfield = UITextField(frame: CGRect(x: 0, y: 0, width: 200, height: 21)) Objective-C UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(0, 0, 200, 21)]; You can also create a UITextField in Interface Builde...

Flyweight is one of structural design patterns. It is used to decrease the amount of used memory by sharing as much data as possible with similiar objects. This document will teach you how to use Flyweight DP properly. Let me explain the idea of it to you on a simple example. Imagine you're working...

If you want to lock the screen orientation change of any screen (activity) of your android application you just need to set the android:screenOrientation property of an <activity> within the AndroidManifest.xml: <activity android:name="com.techblogon.screenorientationexample.Main...

If your application doesn't need to update resources during a specific configuration change and you have a performance limitation that requires you to avoid the activity restart, then you can declare that your activity handles the configuration change itself, which prevents the system from restartin...

The CAEmitterLayer class provides a particle emitter system for Core Animation. The particles are defined by instances of CAEmitterCell. The particles are drawn above the layer’s background color and border. var emitter = CAEmitterLayer() emitter.emitterPosition = CGPoin...

Demonstrate how to embed a lua interpreter in C code, expose a C-defined function to Lua script, evaluate a Lua script, call a C-defined function from Lua, and call a Lua-defined function from C (the host). In this example, we want the mood to be set by a Lua script. Here is mood.lua: -- Get versi...

Validation attributes can be used to easily configure model validation. public class MyModel { public int id { get; set; } //sets the FirstName to be required, and no longer than 100 characters [Required] [StringLength(100)] public string FirstName { get; set; } } Th...

You can add an image to a view's layer simply by using its contents property: myView.layer.contents = UIImage(named: "star")?.CGImage Note that the UIImage needs to be converted to a CGImage. If you wish to add the image in its own layer, you can do it like this: let myLayer = CA...

Basics There are a number of different transforms you can do on a layer, but the basic ones are translate (move) scale rotate To do transforms on a CALayer, you set the layer's transform property to a CATransform3D type. For example, to translate a layer, you would do something like this:...

CALayer property animations are enabled by default. When this is undesirable, they can be disabled as follows. Swift CATransaction.begin() CATransaction.setDisableActions(true) // change layer properties that you don't want to animate CATransaction.commit() Objective-C [CATransaction be...