Tutorial by Examples: s

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 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...

Get all Google Forms with the word "Untitled" in the file name. function mainSearchFunction(searchStr) { var fileInfo,arrayFileIDs,arrayFileNames,arrayOfIndexNumbers, allFileIDsWithStringInName,i,searchStr,thisID;//Declare variables if (!searchStr) { searchStr = &quo...

Suppose we want to select a word without surrounding white spaces, use the text object iw for inner word using visual mode: Got to normal mode by pressing ESC Type viw at the beginning of a word This will select the inner word

Visual Studio also features an available Bundler and Minifier Extension that is capable of handling this process for you. The extension allows you to easily select and bundle the files you need without writing a line of code. Building Your Bundles After installing the extension, you select all of ...

At its most basic level, Unit Testing in any language provides assertions against some known or expected output. function assert( outcome, description ) { var passFail = outcome ? 'pass' : 'fail'; console.log(passFail, ': ', description); return outcome; }; The popular assertio...

To run multiple processes e.g. an Apache web server together with an SSH daemon inside the same container you can use supervisord. Create your supervisord.conf configuration file like: [supervisord] nodaemon=true [program:sshd] command=/usr/sbin/sshd -D [program:apache2] command=/bin/bash...

uses System.Generics.Collections, { TArray } System.Generics.Defaults; { TComparer<T> } var StringArray: TArray<string>; { Also works with "array of string" } ... { Sorts the array case insensitive } TArray.Sort<string>(StringArray, TComparer<string>...

var List: TList<Integer>; ... List := TList<Integer>.Create; { Create List } try List.Add(100); { Add Items } List.Add(200); WriteLn(List[1]); { 200 } finally List.Free; end;

type TIntegerList = class(TList<Integer>) public function Sum: Integer; end; ... function TIntegerList.Sum: Integer; var Item: Integer; begin Result := 0; for Item in Self do Result := Result + Item; end;

Elm allows the definition of custom infix operators. Infix operators are defined using parenthesis around the name of a function. Consider this example of infix operator for construction Tuples 1 => True -- (1, True): (=>) : a -> b -> ( a, b ) (=>) a b = ( a, b ) Most of t...

To illustrate a simple example usage of the MVP pattern, consider the following code which creates a simple UI with only a button and a label. When the button is clicked, the label updates with the number of times the button has been clicked. We have 5 classes: Model - The POJO to maintain state...

Backbone models describe how data is stored using JavaScript objects. Each model is a hash of fields called attributes and the behaviour of the model including validation is described by options. A model of Todo item in a TodoApp would be var ToDo = Backbone.Model.extend({ defaults: { assi...

The easiest way to create a custom data type in Haskell is to use the data keyword: data Foo = Bar | Biz The name of the type is specified between data and =, and is called a type constructor. After = we specify all value constructors of our data type, delimited by the | sign. There is a rule in...

Value constructors are functions that return a value of a data type. Because of this, just like any other function, they can take one or more parameters: data Foo = Bar String Int | Biz String Let's check the type of the Bar value constructor. :t Bar prints Bar :: String -> Int -> Foo...

Type constructors can take one or more type parameters: data Foo a b = Bar a b | Biz a b Type parameters in Haskell must begin with a lowercase letter. Our custom data type is not a real type yet. In order to create values of our type, we must substitute all type parameters with actual types. Be...

Most JVMs have an option to set the maximum heap size e.g. -Xmx64m -Xmx8g In Java 1.0 to 1.2 you could use -mx64m and this is still available on some JVMs for backward compatibility (E.g. Oracle JVM). There are a few common misconceptions about this setting. It doesn't set the heap size...

A lot of Vim users find the Esc too hard to reach, and end up finding another mapping that's easy to reach from the home row. Note that Ctrl-[ may be equivalent to Esc on an English keyboard, and is much easier to reach. jk inoremap jk <ESC> This one is really easy to trigger; just smash...

IPv4 To match IPv4 address format, you need to check for numbers [0-9]{1,3} three times {3} separated by periods \. and ending with another number. ^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$ This regular expression is too simple - if you want to it to be accurate, you need to check that the numbers are be...