Tutorial by Examples: u

You can override 4 methods of SKScene to detect user touch class GameScene: SKScene { override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) { } override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) { ...

If you need to add custom headers to your volley requests, you can't do this after initialisation, as the headers are saved in a private variable. Instead, you need to override the getHeaders() method of Request.class as such: new JsonObjectRequest(REQUEST_METHOD, REQUEST_URL, REQUEST_BODY, RESP_L...

expr or Evaluate expressions evaluates an expression and writes the result on standard output Basic arithmetics expr 2 + 3 5 When multiplying, you need to escape the * sign expr 2 \* 3 6 You can also use variables a=2 expr $a + 3 5 Keep in mind that it only supports integers, so exp...

// Shows the author and commit per line of specified file git blame test.c // Shows the author email and commit per line of specified git blame -e test.c file // Limits the selection of lines by specified range git blame -L 1,10 test.c

Configure your app's URLconf to automatically use a URL namespace by setting the app_name attribute: # In <myapp>/urls.py from django.conf.urls import url from .views import overview app_name = 'myapp' urlpatterns = [ url(r'^$', overview, name='overview'), ] This will set t...

Setup First, install the necessary packages with: npm install express cors mongoose Code Then, add dependencies to server.js, create the database schema and the name of the collection, create an Express.js server, and connect to MongoDB: var express = require('express'); var cors = require('...

Use $this to refer to the current object. Use self to refer to the current class. In other words, use $this->member for non-static members, use self::$member for static members. In the example below, sayHello() and sayGoodbye() are using self and $this difference can be observed here. cl...

The factorial of a number (denoted with !, as for instance 9!) is the multiplication of that number with the factorial of one lower. So, for instance, 9! = 9 x 8! = 9 x 8 x 7! = 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1. So in code that becomes, using recursion: long Factorial(long x) { if (x < 1...

The dot operator repeats the last action performed, for instance: file test.tx helo, World! helo, David! (cursor at [1][1]) Now perform a cwHello<Esc> (Change Word helo to Hello) Now the buffer looks like that: Hello, World! helo, David! (cursor at [1][5]) After typing j_ the cur...

As we know we can declare an array with default values: int[] arr = new int[10]; This will create an array of 10 integers with each element of the array having value 0 (the default value of type int). To create an array initialized with a non-default value, we can use Enumerable.Repeat from the...

You might have heard that everything in Python is an object, even literals. This means, for example, 7 is an object as well, which means it has attributes. For example, one of these attributes is the bit_length. It returns the amount of bits needed to represent the value it is called upon. x = 7 ...

<svg width="900px" height="400px" viewBox="900 400"> <defs> <filter id="GaussianHardEdge" x="0%" y="0%" width="100%" height="100%"> <feGaussianBlur stdDeviation="5"/&gt...

<svg width="900px" height="400px" viewBox="900 400"> <defs> <filter id="GaussianHardEdge" > <feConvolveMatrix order="3" kernelMatrix=" 1 1 1 1 1 1 ...

<svg width="900px" height="400px" viewBox="0 0 900 400"> <defs> <filter id="BokehBlur" color-interpolation-filters="sRGB"> <feGaussianBlur stdDeviation="2" result="blurSource"/> <feCol...

<svg width="800px" height="600px"> <defs> <filter id="complex-shadow" color-interpolation-filters="sRGB" x="-50%" y="-50%" height="200%" width="200%"> <!-- Take source alpha, offset it by angle/...

<svg width="800px" height="600px"> <defs> <filter id="greyscale"> <feColorMatrix type="matrix" values="0.2126 0.7152 0.0722 0 0 0.2126 0.7152 0.0722 0 0 0...

<svg width="800px" height="600px"> <defs> <filter id="greyscale"> <feColorMatrix type="matrix" values="0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 ...

<svg width="800px" height="600px"> <defs> <filter id="greyscale"> <feColorMatrix type="matrix" values=".2 .2 .2 0 0 .6 .6 .6 0 0 .2 .2 .2 0 0 ...

<svg width="800px" height="600px"> <defs> <filter id="focus-blur" > <feDiffuseLighting result = "diffOut" diffuseConstant = "1" lighting-color="white"> <feSpotLight id="spotlight" x =...

OVERVIEW cocos2d-x is an open source, cross-platform game engine. It allows developers to code in C++, Lua and Javascript deployment into iOS, Android, Windows Phone, Mac OS X, Windows Desktop and Linux. PREREQUISITES Build Requirements Mac OS X 10.7+, Xcode 4.6+ Windows 7+, VS 2012+ Ubunt...