Tutorial by Examples: r

Also known as triple equals. This operator does not test equality, but rather tests if the right operand has an IS A relationship with the left operand. As such, the popular name case equality operator is misleading. This SO answer describes it thus: the best way to describe a === b is "if I ...

We are just creating an empty Alloy app using CLI and Atom. Open a new terminal and add the following: ti create --id com.test -d . -n APPNAME -p all -t app -u http://migaweb.de cd APPNAME/ alloy new This will create a basic app (name: APPNAME, bundle identifier: com.test, type: app, platform...

There are several ways to compile your app. You can use the simulator/emulator, deploy it to your device or create store apk's/ipa's. There is also a live test tool (TiShadow) which saves you a lot of time waiting for the compiler. cli way # android to device ti build -p android -T device # a...

__dir__ is not a constant but a function __dir__ is equal to File.dirname(File.realpath(__FILE__))

Contains the name of the script being executed. Is the same as __FILE__ if you are executing that script.

Command line arguments given for the script. The options for Ruby interpreter are already removed.

The standard error output. The default value for $stderr

The current standard error output.

To create a gemset we need to create a .rvmrc file. Syntax: $ rvm --rvmrc --create <ruby-version>@<gemsetname> Example: $ rvm --rvmrc --create ruby-2.2.2@myblog The above line will create a .rvmrc file in the root directory of the app. To get the list of available gemsets, us...

This code opens a file for writing. Returns an error if the file couldn't be opened. Also closes the file at the end. #!/usr/bin/perl use strict; use warnings; use open qw( :encoding(UTF-8) :std ); # Make UTF-8 default encoding # Open "output.txt" for writing (">") and ...

The permutation method, when called with a block yields a two dimensional array consisting of all ordered sequences of a collection of numbers. If this method is called without a block, it will return an enumerator. To convert to an array, call the to_a method. ExampleResult[1,2,3].permutation#&lt...

Example Podfile: target 'MyProject' do pod 'AWSS3' pod 'RealmSwift' end and if you wanted to remove RealmSwift, remove that line from your Podfile target 'MyProject' do pod 'AWSS3' end then from the command line run $ pod install and CocoaPods will remove RealmSwift.

DatabaseTransactions trait allows databases to rollback all the change during the tests. If you want to rollback multiple databases , you need to set $connectionsToTransact properties use Illuminate\Foundation\Testing\DatabaseMigrations; class ExampleTest extends TestCase { use Databas...

let configuration = WKWebViewConfiguration() if let path = NSBundle.mainBundle().pathForResource("customUserScript", ofType: "js"), source = try? NSString(contentsOfFile: path, encoding: NSUTF8StringEncoding) as String { let userScript = WKUserScript(source...

Messages can be sent from JavaScript using the following code window.webkit.messageHandlers.{NAME}.postMessage() Here how to create a script message handler to handle the messages: class NotificationScriptMessageHandler: NSObject, WKScriptMessageHandler { func userContentController(userCon...

function createGoogleDriveFileOfMimeType() { var content,fileName,newFile;//Declare variable names fileName = "Test File " + new Date().toString().slice(0,15);//Create a new file name with date on end content = "This is the file Content"; newFile = DriveApp.cre...

function createGoogleDriveTextFile() { var content,fileName,newFile;//Declare variable names fileName = "Test Doc " + new Date().toString().slice(0,15);//Create a new file name with date on end content = "This is the file Content"; newFile = DriveApp.createFile...

function createGoogleDriveFileWithBlob() { var blob,character,data,fileName,i,L,max,min,newFile,randomNmbr;//Declare variable names fileName = "Test Blob " + new Date().toString().slice(0,15);//Create a new file name with date on end L = 500;//Define how many times to loo...

function processGoogleDriveFolders() { var arrayAllFolderNames,continuationToken,folders,foldersFromToken,thisFolder;//Declare variable names arrayAllFolderNames = [];//Create an empty array and assign it to this variable name folders = DriveApp.getFolders();//Get all folders from ...

function processGoogleDriveFiles() { var arrayAllFileNames,continuationToken,files,filesFromToken,fileIterator,thisFile;//Declare variable names arrayAllFileNames = [];//Create an empty array and assign it to this variable name files = DriveApp.getFiles();//Get all files from Googl...