Tutorial by Examples: e

Install node modules npm install express npm install socket.io Node.js server const express = require('express'); const app = express(); const server = app.listen(3000,console.log("Socket.io Hello Wolrd server started!")); const io = require('socket.io')(server); io.on('connec...
Open Graph is a standard for metadata that extends the normal information contained within a site's head markup. This enables websites such as Facebook to display deeper and richer information about a website in a structured format. This information is then automatically displayed when users share l...
stri_paste(LETTERS,"-", 1:13) # [1] "A-1" "B-2" "C-3" "D-4" "E-5" "F-6" "G-7" "H-8" "I-9" "J-10" "K-11" "L-12" "M-13" # [14] "N-1" "...
Split vector of texts using one pattern: stri_split_fixed(c("To be or not to be.", "This is very short sentence.")," ") # [[1]] # [1] "To" "be" "or" "not" "to" "be." # # [[2]] # [1] "This" ...
This is an simple example to create a mysql server with docker 1.- create docker-compose.yml: Note: If you want to use same container for all your projects, you should create a PATH in your HOME_PATH. If you want to create it for every project you could create a docker directory in your project. ...
You want to convert all elements in an array to some other form. For example, you have theUsers = [ {id: 1, username: 'john'} {id: 2, username: 'lexy'} {id: 3, username: 'pete'} ] and you want to have an array of usernames only, i.e. ['john', 'lexy', 'pete'] Method 1 - using .map ...
theUsers = [ {id: 1, username: 'john'} {id: 2, username: 'lexy'} {id: 3, username: 'pete'} ] To retain only users whose id is greather than 2, use the following: [{id: 3, username: 'pete'}] Method 1 - using .filter filteredUsers = theUsers.filter (user) -> user.id >= 2 Met...
Alert is a simple popup that displays a set of buttons and gets an result depending on the button the user clicked: Example This lets the user decide, if (s)he really wants to close the primary stage: @Override public void start(Stage primaryStage) { Scene scene = new Scene(new Group(), 100...
The text displayed in a button can be customized, by creating a ButtonType instance yourself: ButtonType answer = new ButtonType("42"); ButtonType somethingElse = new ButtonType("54"); Alert alert = new Alert(Alert.AlertType.NONE, "What do you get when you multiply six ...
/// <summary> /// Converts a data type to another data type. /// </summary> public static class Cast { /// <summary> /// Converts input to Type of default value or given as typeparam T /// </summary> /// <typepara...
/// <summary> /// Read configuration values from app.config and convert to specified types /// </summary> public static class ConfigurationReader { /// <summary> /// Get value from AppSettings by key, convert to Type of default value or typ...
[TestFixture] public class UnitTest1 { class Message { public string Text { get; } = "Hello World"; } [Test] public void HelloWorldTest() { // Act var message = new Message(); // Assert Assert.That(message.Tex...
root: build.gradle buildscript { repositories { jcenter() } dependencies { classpath 'com.android.tools.build:gradle-experimental:0.8.0-alpha4' } } allprojects { repositories { jcenter() } } app: build.gradle apply plugin: 'com.andro...
root: build.gradle buildscript { repositories { jcenter() } dependencies { classpath 'com.android.tools.build:gradle-experimental:0.8.0-alpha4' } } allprojects { repositories { jcenter() } } app: build.gradle apply plugin: 'com.andro...
You can wrap values into actions and pipe the result of one computation into another: return :: Monad m => a -> m a (>>=) :: Monad m => m a -> (a -> m b) -> m b However, the definition of a Monad doesn’t guarantee the existence of a function of type Monad m => m a -&...
person = name: "Duder von Broheim" age: 27 address: "123 Fake St" phoneNumber: "867-5309" {name, age, address, phoneNumber} = person
CoffeeScript allows to deconstruct objects and arrays when they are fed to functions as arguments. A function that leverages deconstruction will specify in its signature all the fields that are expected within its body. When invoking such function, an object or array containing all the expected fie...
array = [1, 2, 3, 4] [first] = array # 1 [..., last] = array # 4 [first, middle..., last] = array # first is 1, middle is [2, 3], last is 4
The unset command is used to remove one or more variables. unset ?-nocomplain? ?--? ?name name name name? Each name is a variable name specified in any of the ways acceptable to the set command. If a name refers to an element of an array then that element is removed without affecting the rema...
XML <Goku> <child name="Gohan"/> <child name="Goten"/> </Goku> XPATH count(/Goku/child) OUTPUT 2.0

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