Tutorial by Examples: r

Move every outlet to an NSObject. Then drag an Object from the library to the controller scene of the storyboard and hook the elements there. class ContactFormStyle: NSObject { @IBOutlet private weak var message: UILabel! { didSet { message.font = UIFont.systemFontOfSize(12) ...

//Swift let initialScreen = storyboard.instantiateInitialViewController() //Objective-c UIViewController *initailScreen = [storyboard instantiateInitialViewController];

//Swift let viewController = storyboard.instantiateViewControllerWithIdentifier("identifier") //Objective-c UIViewController *viewController = [storyboard instantiateViewControllerWithIdentifier:@"identifier"];

Strings can be assigned directly to byte arrays and visa-versa. Remember that Strings are stored in a Multi-Byte Character Set (see Remarks below) so only every other index of the resulting array will be the portion of the character that falls within the ASCII range. Dim bytes() As Byte Dim exampl...

Add a key named Required background modes in property list (.plist) file .. as following picture.. And add following code in AppDelegate.h #import <AVFoundation/AVFoundation.h> #import <AudioToolbox/AudioToolbox.h> AppDelegate.m in application didFinishLaunchingWithOptions [[...

public class MyDataExporterToExcell { public static void Main() { GetAndExportExcelFacade facade = new GetAndExportExcelFacade(); facade.Execute(); } } public class GetAndExportExcelFacade { // All services below do something by themselves, determine l...

The following is a simple example of using the strategy pattern without a context class. There are two implementation strategies which implement the interface and solve the same problem in different ways. Users of the EnglishTranslation class can call the translate method and choose which strategy t...

Intent: Define an interface for creating an object, but let sub classes decide which class to instantiate. Factory Method lets a class defer instantiation to sub classes. UML diagram: Product: It defines an interface of the objects the Factory method creates. ConcreteProduct: Implements Produc...

The Builder pattern allows you to create an instance of a class with many optional variables in an easy to read way. Consider the following code: public class Computer { public GraphicsCard graphicsCard; public Monitor[] monitors; public Processor processor; public Memory[] r...

Another way to hide admin bar is to add if ( !current_user_can( 'manage_options' ) ) { add_filter( 'show_admin_bar', '__return_false' , 1000 ); } The users who don't have privileges to access Settings page, won't be able to see the admin bar.

This example demonstrate how to add caching capabilities to DbProductRepository using Decorator pattern. This approach adheres to SOLID principles because it allows you to add caching without violating Single responsibility principle or Open/closed principle. public interface IProductRepository { ...

Input.acceleration is used to read the accelerometer sensor. It returns Vector3 as a result which contains x,y and z axis values in 3D space. void Update() { Vector3 acclerometerValue = rawAccelValue(); Debug.Log("X: " + acclerometerValue.x + " Y: " + acclerometerV...

BigInteger supports the binary logic operations that are available to Number types as well. As with all operations they are implemented by calling a method. Binary Or: BigInteger val1 = new BigInteger("10"); BigInteger val2 = new BigInteger("9"); val1.or(val2); Output:...

Simple case without duplicate keys Stream<String> characters = Stream.of("A", "B", "C"); Map<Integer, String> map = characters .collect(Collectors.toMap(element -> element.hashCode(), element -> element)); // map = {65=A, 66=B, 67=C} ...

'use strict'; const co = require('co'); module.exports = { // This is the index action and the route is mapped via /config/routes.js index(req, res) { co(function* index() { // Return a view without view model data // This typically will return the view defined at /vie...

Given a basic model: class SpreadsheetCells(Base): __tablename__ = 'spreadsheet_cells' id = Column(Integer, primary_key=True) y_index = Column(Integer) x_index = Column(Integer) You can retrieve an ordered list by chaining the order_by method. query = session.query(Spreads...

SELECT * FROM customers WHERE id IN ( SELECT DISTINCT customer_id FROM orders ); The above will give you all the customers that have orders in the system.

Classes provide a way of creating your own types within the .NET framework. Within a class definition you may include the following: Fields Properties Methods Constructors Events To declare a class you use the following syntax: Public Class Vehicle End Class Other .NET types can...

If classes share common functionality you can group this in a base or abstract class. Abstract classes can contain partial or no implementation at all and allow the derived type to override the base implementation. Abstract classes within VisualBasic.NET must be declared as MustInherit and cannot ...

Converting between encodings is easy with C++11 and most compilers are able to deal with it in a cross-platform manner through <codecvt> and <locale> headers. #include <iostream> #include <codecvt> #include <locale> #include <string> using namespace std; i...