Tutorial by Examples: v

The DATE data type does not handle time zones or changes in daylight savings time. Either: use the TIMESTAMP WITH TIME ZONE data type; or handle the changes in your application logic. A DATE can be stored as Coordinated Universal Time (UTC) and converted to the current session time zone like...

You can make a task available to Artisan and to your application in the app/Console/Kernel.php file. The Kernel class contains an array named $commands which make your commands available to your application. Add your command to this array, in order to make it available to Artisan and your applicat...

It is common for an AsyncTask to require a reference to the Activity that called it. If the AsyncTask is an inner class of the Activity, then you can reference it and any member variables/methods directly. If, however, the AsyncTask is not an inner class of the Activity, you will need to pass an A...

std::optional<float> divide(float a, float b) { if (b!=0.f) return a/b; return {}; } Here we return either the fraction a/b, but if it is not defined (would be infinity) we instead return the empty optional. A more complex case: template<class Range, class Pred> auto find_if...

void print_name( std::ostream& os, std::optional<std::string> const& name ) { std::cout "Name is: " << name.value_or("<name missing>") << '\n'; } value_or either returns the value stored in the optional, or the argument if there is nothing s...

Launch mode defines the behaviour of new or existing activity in the task. There are possible launch modes: standard singleTop singleTask singleInstance It should be defined in android manifest in <activity/> element as android:launchMode attribute. <activity android:launchM...

You can call an instance method using the . special form: (.trim " hello ") ;;=> "hello" You can call instance methods with arguments like this: (.substring "hello" 0 2) ;;=> "he"

You can call an instance field using the .- syntax: (def p (java.awt.Point. 0 1)) (.-x p) ;;=> 0 (.-y p) ;;=> 1

You can create instance of objects in one of two ways: (java.awt.Point. 0 1) ;;=> => #object[java.awt.Point 0x3776d535 "java.awt.Point[x=0,y=1]"] Or (new java.awt.Point 0 1) ;;=> => #object[java.awt.Point 0x3776d535 "java.awt.Point[x=0,y=1]"]

You can call a Clojure function from Java code by looking up the function and invoking it: IFn times = Clojure.var("clojure.core", "*"); times.invoke(2, 2); This looks up the * function from the clojure.core namespace and invokes it with the arguments 2 & 2.

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

The hash-like object contains current environment variables. Setting a value in ENV changes the environment for child processes.

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.

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...

function DriveAppAddFolder(child) {//Adds file to the root drive in Google Drive var body,returnedFolder;//Declare variable names if (!child) { body = "There is no folder"; MailApp.sendEmail(Session.getEffectiveUser().getEmail(), "", "Error Adding Folder!&q...