Tutorial by Examples: g

Singly Linked Lists are a type of linked list. A singly linked list's nodes have only one "pointer" to another node, usually "next." It is called a singly linked list because each node only has a single "pointer" to another node. A singly linked list may have a head and...

Escape sequences are not restricted to string and char literals. Suppose you need to override a third-party method: protected abstract IEnumerable<Texte> ObtenirŒuvres(); and suppose the character Œ is not available in the character encoding you use for your C# source files. You are lucky...

Whenever AFNetworking is used the call is dispatched on a custom thread provided by AFNetworking. When the call returns to the completion block, it gets executed on the main thread. This example sets a custom thread that dispatch to the completion block: AFNetworking 2.xx: // Create dispatch_queu...

// class declaration with a list of parameters for a primary constructor type Car (model: string, plates: string, miles: int) = // secondary constructor (it must call primary constructor) new (model, plates) = let miles = 0 new Car(model, plates, miles) ...

ANTLR is distributed as a Java Jar file It can be downloaded here. As ANTLR is compiled as a jar file it subsequently requires the Java runtime environment to operate, if you do not have It can be downloaded here. Once the ANTLR JAR file has been downloaded you can run ANTLR from the command line i...

Open Xcode and select Create a new Xcode Project. Now select iOS > Application on the left and Game on the main selection area. Press Next. Write into Product Name the name of your first great game. Into Organization Name the name of your company (or simply your own name). Organisation I...

As discussed in the introduction, the gradle wrapper functionality works because a jar is downloaded into the project to be used when the gradlew command is run. However this may not get committed and after the next time the project is checked out, gradlew will fail to run with the error: Error: C...

Gradle has the ability to add a wrapper to projects. This wrapper alleviates the need for all users or continuous integration systems to have Gradle installed. It also prevents version issues where there is some incompatibility between the version the project uses and that which users have installed...

Let's say you have class with generic methods. And you need to call its functions with reflection. public class Sample { public void GenericMethod<T>() { // ... } public static void StaticMethod<T>() { //... } } Let's say we want to...

From Apple documentation: Use the CTCallCenter class to obtain a list of current cellular calls, and to respond to state changes for calls such as from a dialing state to a connected state. Such state changes are known as cellular call events. The purpose of CTCallCenter is to give the develop...

You can subclass SKSpriteNode and define your own type of sprite. class Hero: SKSpriteNode { //Use a convenience init when you want to hard code values convenience init() { let texture = SKTexture(imageNamed: "Hero") self.init(texture: texture, color: .clearCol...

In contrast to segue that lets you pass data "forward" from current view controller to destination view controller: (VC1) -> (VC2) Using "unwind" you can do the opposite, pass data from the destination or current view controller to its presenting view controller: (VC1) <...

Let's say you have a User model class User < ActiveRecord::Base end Now to update the first_name and last_name of a user with id = 1, you can write the following code. user = User.find(1) user.update(first_name: 'Kashif', last_name: 'Liaqat') Calling update will attempt to update the gi...

\documentclass{report} \begin{document} \title{I want to be a Wombat} \author{Carl Capybara} \maketitle \end{document} This will create a title page with no other content:

RoboGuice is a framework that brings the simplicity and ease of Dependency Injection to Android, using Google's own Guice library. RoboGuice 3 slims down your application code. Less code means fewer opportunities for bugs. It also makes your code easier to follow -- no longer is your code littered ...

Write to a file test.txt: String filepath ="C:\\test.txt"; FileOutputStream fos = null; try { fos = new FileOutputStream(filepath); byte[] buffer = "This will be written in test.txt".getBytes(); fos.write(buffer, 0, buffer.length); fos.close(); } c...

public static void Main(string[] args) { var studentList = new List<Student>(); studentList.Add(new Student("Scott", "Nuke")); studentList.Add(new Student("Vincent", "King")); studentList.Add(new Student("Craig", "Be...

If you want the Value Types vs Reference Types in methods example to work properly, use the ref keyword in your method signature for the parameter you want to pass by reference, as well as when you call the method. public static void Main(string[] args) { ... DoubleNumber(ref number); ...

If you are given a JSON string : val str = """{ | "name" : "Jsony McJsonface", | "age" : 18, | "hobbies" : [ "Fishing", "Hunting", "Camping" ], | "pet" : { | ...

C-style bit manipulation A bit can be set using the bitwise OR operator (|). // Bit x will be set number |= 1LL << x; Using std::bitset set(x) or set(x,true) - sets bit at position x to 1. std::bitset<5> num(std::string("01100")); num.set(0); // num is now 01101 ...