// View to hold the CAGradientLayer.
let view: UIView = UIView(frame: CGRect(x: 0, y: 0, width: 320, height: 320))
// Initialize gradient layer.
let gradientLayer: CAGradientLayer = CAGradientLayer()
// Set frame of gradient layer.
gradientLayer.frame = view.bounds
// Color a...
// View to hold the CAGradientLayer.
let view: UIView = UIView(frame: CGRect(x: 0, y: 0, width: 320, height: 320))
// Initialize gradient layer.
let gradientLayer: CAGradientLayer = CAGradientLayer()
// Set frame of gradient layer.
gradientLayer.frame = view.bounds
// Color at the top of...
// View to hold the CAGradientLayer.
let view: UIView = UIView(frame: CGRect(x: 0, y: 0, width: 320, height: 320))
// Initialize gradient layer.
let gradientLayer: CAGradientLayer = CAGradientLayer()
// Set frame of gradient layer.
gradientLayer.frame = view.bounds
// Color at the top of...
There are a number of collection types in Python. While types such as int and str hold a single value, collection types hold multiple values.
Lists
The list type is probably the most commonly used collection type in Python. Despite its name, a list is more like an array in other languages, mostl...
For instance, a computation involving commands to read and write from the prompt:
First we describe the "commands" of our computation as a Functor data type
{-# LANGUAGE DeriveFunctor #-}
data TeletypeF next
= PrintLine String next
| ReadLine (String -> next)
derivin...
Create an application
heroku create your-app-name
Deploy to Heroku
git push heroku master
Open your application in a browser
heroku open your-app-name
List Heroku commands
heroku commands
General help
heroku help
Help for a specific command
heroku help <command>
Constructor functions are functions designed to construct a new object. Within a constructor function, the keyword this refers to a newly created object which values can be assigned to. Constructor functions "return" this new object automatically.
function Cat(name) {
this.name = name;...
Each time you use a selector in jQuery the DOM is searched for elements that match your query. Doing this too often or repeatedly will decrease performance. If you refer to a specific selector more than once you should add it to the cache by assigning it to a variable:
var nav = $('#navigation');
...
Using the apt package manager
sudo apt-get update
sudo apt-get install nodejs
sudo apt-get install npm
sudo ln -s /usr/bin/nodejs /usr/bin/node
# the node & npm versions in apt are outdated. This is how you can update them:
sudo npm install -g npm
sudo npm install -g n
sudo n stabl...
There are two parts of a class: the interface and the implementation.
The interface is the exposed functionality of the class. Its public methods and variables are part of the interface.
The implementation is the internal workings of a class. Other classes shouldn't need to know about the implemen...
Encapsulation allows you to make internal changes to a class without affecting any code that calls the class. This reduces coupling, or how much any given class relies on the implementation of another class.
For example, let's change the implementation of the Angle class from the previous example:
...
When implementing more than one interface that have methods of the same name that include default implementations, it is ambiguous to the compiler which implementation should be used. In the case of a conflict, the developer must override the conflicting method and provide a custom implementation. ...
Compares two values for equality. It can compare strings, integers, and Boolean values only.
Assert.AreEqual(documentElement.LocalName, "xamlControls", "Xaml files must have a root node named 'xamlControls'.");
First download anaconda from the Continuum site. Either via the graphical installer (Windows/OSX) or running a shell script (OSX/Linux). This includes pandas!
If you don't want the 150 packages conveniently bundled in anaconda, you can install miniconda. Either via the graphical installer (Window...
Installing Jasmine standalone
Download the latest Jasmine release from the Jasmine release page:
Running Jasmine locally
Run Jasmine in the browser by downloading the zip file, extracting it, the referencing the files as follows:
<link rel="shortcut icon" type="image/png&qu...
A query engine is required in order to execute SPARQL queries over a dataset. Query engines may be embedded in applications, or accessed remotely. Remote access may be through a vendor-specific API, or through the SPARQL protocol if an implementation supports it. This documentation will not cover ho...
Detailed instructions on getting Zend Framework 2 set up or installed. There are various ways of installing the framework. Below are some of them:
Using Composer - Recommended way
Assuming composer is installed on the target box.
To install a skeleton MVC application, run in your terminal to crea...
When creating a SOAP Client in PHP, you can also set a classmap key in the configuration array. This classmap defines which types defined in the WSDL should be mapped to actual classes, instead of the default StdClass. The reason you would want to do this is because you can get auto-completion of fi...
use std::fs::File;
use std::io::Read;
fn main() {
let filename = "src/main.rs";
// Open the file in read-only mode.
match File::open(filename) {
// The file is open (no error).
Ok(mut file) => {
let mut content = String::new();
...
use std::fs::File;
use std::io::{BufRead, BufReader};
fn main() {
let filename = "src/main.rs";
// Open the file in read-only mode (ignoring errors).
let file = File::open(filename).unwrap();
let reader = BufReader::new(file);
// Read the file line by line us...
