Tutorial by Examples: et

Set position of a Toast

A standard toast notification appears at the bottom of the screen aligned in horizontal centre. You can change this position with the setGravity(int, int, int). This accepts three parameters: a Gravity constant, an x-position offset, and a y-position offset. For example, if you decide that the toas...

Android • Toast

Match a letter at the end of a line or string

g$ The above matches one letter (the letter g) at the end of a string in most regex engines (not in Oniguruma, where the $ anchor matches the end of a line by default, and the m (MULTILINE) modifier is used to make a . match any characters including line break characters, as a DOTALL modifier in ...

Regular Expressions • Anchor Characters: Dollar ($)

Installation or Setup

Detailed instructions on getting mapbox set up or installed.

mapbox • Getting started with mapbox

Use the `email` as username and get rid of the `username` field

If you want to get rid of the username field and use email as unique user identifier, you will have to create a custom User model extending AbstractBaseUser instead of AbstractUser. Indeed, username and email are defined in AbstractUser and you can't override them. This means you will also have to r...

Django • Extending or Substituting User Model

Basic Setup

Backbone requires Underscore and (optionally) jQuery - for DOM manipulation (using Backbone.View) and RESTful persistence. The quickest way to get up and running with Backbone is to create an index.html file with simple script tags in the HTML <head>: <html> <head> ...

backbone.js • Getting started with backbone.js

CREATE TABLE With FOREIGN KEY

Below you could find the table Employees with a reference to the table Cities. CREATE TABLE Cities( CityID INT IDENTITY(1,1) NOT NULL, Name VARCHAR(20) NOT NULL, Zip VARCHAR(10) NOT NULL ); CREATE TABLE Employees( EmployeeID INT IDENTITY (1,1) NOT NULL, FirstName VARCHA...

SQL • CREATE TABLE

Sending a minimal HTTP request manually using Telnet

This example demonstrates that HTTP is a text-based Internet communications protocol, and shows a basic HTTP request and the corresponding HTTP response. You can use Telnet to manually send a minimal HTTP request from the command line, as follows. Start a Telnet session to the web server www.e...

HTTP • HTTP requests

Create a string with strikethrough text

Objective-C NSMutableAttributedString *attributeString = [[NSMutableAttributedString alloc] initWithString:@"Your String here"]; [attributeString addAttribute:NSStrikethroughStyleAttributeName value:@2 range:NSMakeRange(0, [attributeString length...

iOS • NSAttributedString

Installation or Setup

AEM can be installed as a standalone executable JAR file or through web application servers, such as JBoss and WebSphere, as a WAR file. Prerequisites AEM 6.2 needs at minimum the following in order to run Java Runtime Environment (JRE) 1.8x (64bit) 5GB of free disk space for installation 2GB...

aem • Getting started with aem

Installation or Setup

Detailed instructions on getting braintree set up or installed.

braintree • Getting started with braintree

Initialize text field

Swift let frame = CGRect(x: 0, y: 0, width: 100, height: 100) let textField = UITextField(frame: frame) Objective-C CGRect *frame = CGRectMake(0, 0, 100, 100); UITextField *textField = [[UITextField alloc] initWithFrame:frame]; Interface Builder You can also add a UITextField to a storybo...

iOS • UITextField

Getting elements

> ourList = [1,2,3,4,5] [1,2,3,4,5] : List number > > firstElement = List.head ourList Just 1 : Maybe Int > > allButFirst = List.tail ourList Just [2,3,4,5] : Maybe (List Int) This wrapping into Maybe type happens because of the following scenario: What should List.head ret...

Elm Language • Lists and Iteration

Multiple parameter groups of different types, currying parameters of arbitrary positions

def numberOrCharacterSwitch(toggleNumber: Boolean)(number: Int)(character: Char): String = if (toggleNumber) number.toString else character.toString // need to explicitly specify the type of the parameter to be curried // resulting function signature Boolean => String val switchBetween3A...

Scala Language • Currying

Currying a function with a single parameter group

def minus(left: Int, right: Int) = left - right val numberMinus5 = minus(_: Int, 5) val fiveMinusNumber = minus(5, _: Int) numberMinus5(7) // 2 fiveMinusNumber(7) // -2

Scala Language • Currying

Detecting a string

To detect whether a parameter is a primitive string, use typeof: var aString = "my string"; var anInt = 5; var anObj = {}; typeof aString === "string"; // true typeof anInt === "string"; // false typeof anObj === "string"; // false If you ev...

JavaScript • Strings

Iterate Through Collections Using a For Loop

This demonstrates how to print each element of a Map val map = Map(1 -> "a", 2 -> "b") for (number <- map) println(number) // prints (1,a), (2,b) for ((key, value) <- map) println(value) // prints a, b This demonstrates how to print each element of a list val l...

Scala Language • For Expressions

Manual OpenGL setup on Windows

Full example code included at the end Windows components for OpenGL WGL WGL (can be pronounced wiggle) stands for "Windows-GL", as in "an interface between Windows and OpenGL" - a set of functions from the Windows API to communicate with OpenGL. WGL functions have a wgl prefix...

opengl • Getting started with opengl

Using methods as function values

The Scala compiler will automatically convert methods into function values for the purpose of passing them into higher-order functions. object MyObject { def mapMethod(input: Int): String = { int.toString } } Seq(1, 2, 3).map(MyObject.mapMethod) // Seq("1", "2", &...

Scala Language • Higher Order Function

Installation or Setup

Detailed instructions on getting domain-driven-design set up or installed.

domain-driven-design • Getting started with domain-driven-design

Check if String contains Characters from a Defined Set

Letters 3.0 let letters = CharacterSet.letters let phrase = "Test case" let range = phrase.rangeOfCharacter(from: letters) // range will be nil if no letters is found if let test = range { print("letters found") } else { print("letters not found") }...

Swift Language • Strings and Characters