Tutorial by Examples: ar

Numeric values can compared with = and the other numeric comparison operators (/=, <, <=, >, >=) that ignore the difference in the physical representation of the different types of numbers, and perform the comparison of the corresponding mathematical values. For instance: (= 42 42) T ;...

Common Lisp has 12 type specific operators to compare two characters, 6 of them case sensitives and the others case insensitives. Their names have a simple pattern to make easy to remember their meaning: Case SensitiveCase InsensitiveCHAR=CHAR-EQUALCHAR/=CHAR-NOT-EQUALCHAR<CHAR-LESSPCHAR<=CHA...

Systems can help separate logic and behavior from data if desired. We let systems handle the heavy lifting, and components only worry about managing its data through its lifecycle methods: AFRAME.registerSystem('my-component', { createComplexObject: function (data) { // Do calculations ...

Since A-Frame fetches assets using XHRs, browser security requires the browser to serve assets with cross-origin resource sharing (CORS) headers if the asset is on a different domain. Otherwise, we'd have to host assets on the same origin as the scene. For some options, GitHub Pages serves every...

using System; using System.IO; using System.IO.Compression; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { string zipPath = @"c:\example\start.zip"; string extractPath = @"c:\example\extract...

Lets say we want to build a paginated list of products, where the number of the page is passed as a query string parameter. For instance, to fetch the 3rd page, you'd go to: http://example.com/products?page=3 The raw HTTP request would look something like this: GET /products?page=3 HTTP/1.1 Ho...

PHP exposes a number of so-called global variables which contain information about the HTTP request, such as $_POST, $_GET, $_FILES, $_SESSION, etc. The Request class contains a static createFromGlobals() method in order to instantiate a request object based on these variables: use Symfony\Componen...

To get the contents of a form that is submitted with method="post", use the post property: $name = $request->request->get('name');

Installation or Setup Slim framework Install Composer Open cmd Go to Root directory of your Project Folder and Run Following Command. composer require slim/slim "^3.0" Now you will have vendor directory in your project Next Create Index.php in root folder and add following co...

There are various types of inheritance and code reuse in Twig: Include The main goal is code reuse. Consider using header.html.twig & footer.html.twig inside base.html.twig as an example. header.html.twig <nav> <div>Homepage</div> <div>About</div> </...

The ternary operator (?:) Support for the extended ternary operator was added in Twig 1.12.0. {{ foo ? 'yes' : 'no' }} Evaluates: if foo echo yes else echo no {{ foo ?: 'no' }} or {{ foo ? foo : 'no' }} Evaluates: if foo echo it, else echo no {{ foo ? 'yes' }} or {{ f...

In Kotlin, variable declarations look a bit different than Java's: val i : Int = 42 They start with either val or var, making the declaration final ("value") or variable. The type is noted after the name, separated by a : Thanks to Kotlin's type inference the explicit typ...

Suppose you want the user to select keywords from a menu, we can create a script similar to #!/usr/bin/env bash select os in "linux" "windows" "mac" do echo "${os}" break done Explanation: Here select keyword is used to loop through a list ...

In Kotlin, if, try and others are expressions (so they do return a value) rather than (void) statements. So, for example, Kotlin does not have Java's ternary Elvis Operator, but you can write something like this: val i = if (someBoolean) 33 else 42 Even more unfamiliar, but equally expressive, ...

Here's an example with the technique(hack) invented by the dostips forums' user Liviu: @echo off echo Printed by CMD.EXE cscript //nologo "%~f0?.wsf" //job:JS //job:VBS exit /b %errorlevel% ----END OF BATCH CODE--- <package> <job id="JS"> <script...

<dependencies> <dependency> <groupId>{ejbModuleGroupId}</groupId> <artifactId>{ejbModuleArtifactId}</artifactId> <version>{ejbModuleVersion}</version> <type>ejb</type> </dependency> &...

An Array Data Structure is used to store similar objects (or data values) in a contiguous block of memory. Array Data Structure has fixed size, which determines the number of data values that can be stored in it. Array : The C++ Way In C++ Programming Language, we can declare a static arr...

The core data structure in numpy is the ndarray (short for n-dimensional array). ndarrays are homogeneous (i.e. they contain items of the same data-type) contain items of fixed sizes (given by a shape, a tuple of n positive integers that specify the sizes of each dimension) One-dimensional ar...

When generating new Angular 2 components in a .NET Core project, you may run into the following errors (as of version 0.8.3): Error locating module for declaration SilentError: No module files found OR No app module found. Please add your new Class to your component. Identica...

Like other value types, GUID also has a nullable type which can take null value. Declaration : Guid? myGuidVar = null; This is particularly useful when retrieving data from the data base when there is a possibility that value from a table is NULL.