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interface IArrayWrapper { public function getProperties(): array; public function has(string $name): bool; public function __toString(); // ... }; /** * Lightweight in-place data wrapper. * Demonstrates usage of anonymous class in conjunction with interface. * * Pro...

Install virtualenv via pip / (apt-get): pip install virtualenv OR apt-get install python-virtualenv Note: In case you are getting permission issues, use sudo.

If you look at the bin directory in your virtualenv, you’ll see easy_install which has been modified to put eggs and packages in the virtualenv’s site-packages directory. To install an app in your virtual environment: $ source test_project/bin/activate $ pip install flask At this time, you do...

lsvirtualenv : List all of the environments. cdvirtualenv : Navigate into the directory of the currently activated virtual environment, so you can browse its site-packages, for example. cdsitepackages : Like the above, but directly into site-packages directory. lssitepackages : Shows contents of ...

&& has precedence over ||, this means that parentheses are placed to evaluate what would be evaluated together. c++ uses short-circuit evaluation in && and || to not do unnecessary executions. If the left hand side of || returns true the right hand side does not need to be evaluate...

List<Integer> immutableEmptyList = List.of(); Initializes an empty, immutable List<Integer>. List<Integer> immutableList = List.of(1, 2, 3, 4, 5); Initializes an immutable List<Integer> with five initial elements. List<Integer> mutableList = new ArrayL...

Set<Integer> immutableEmptySet = Set.of(); Initializes an empty, immutable Set<Integer>. Set<Integer> immutableSet = Set.of(1, 2, 3, 4, 5); Initializes an immutable Set<Integer> with five initial elements. Set<Integer> mutableSet = new HashSet<>(...

Map<Integer, Integer> immutableEmptyMap = Map.of(); Initializes an empty, immutable Map<Integer, Integer>. Map<Integer, Integer> immutableMap = Map.of(1, 2, 3, 4); Initializes an immutable Map<Integer, Integer> with two initial key-value entries. Map<Inte...

Service that is used for communication: import { Injectable } from '@angular/core'; import { Subject } from 'rxjs/Subject'; @Injectable() export class ComponentCommunicationService { private componentChangeSource = new Subject(); private newDateCreationSource = new Subject<Date&...

Model: public class User { public int ID { get; set; } public string FirstName { get; set; } public DateTime DateOfBirth { get; set; } } If we want to display the users in different Views, it would be better to create a standardized layout for these users wherever they need...

Node.js is a Javascript engine (Google's V8 engine for Chrome, written in C++) that allows to run Javascript outside the browser. While numerous libraries are available for extending Node's functionalities, the engine comes with a set of core modules implementing basic functionalities. There's curr...

Display Templates can be used to standardize the layout of an object, so let's now see how we can do the same thing for these objects when editing them. Just like display templates, there's two ways to call editor templates for a given type: Html.EditorFor() Html.EditorForModel() Editor templat...

What is it? BuildTools.jar is a solution to building Bukkit, CraftBukkit, Spigot, and the Spigot-API. All of which is done on your computer! A few prerequisite programs are necessary, but the instructions below will guide you through everything you need to do. Prerequisites There are two applicat...

If you have a lot of commands, you shouldn't put them all in the main class. Make a new class and have it implement CommandExecutor Add the following to the class: @Override public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) { } In your...

MultiTrigger is not needed frequently but there are some situations where it is very handy. MultiTrigger behaves similarly to Trigger or DataTrigger but it has multiple conditions. All the conditions must be true for a Setters to fire. Here is a simple example: <!-- Text field needs to be initia...

The following function adds four threads. Three threads compete for the semaphore, which is set to a count of one. A slower thread calls notify_one(), allowing one of the waiting threads to proceed. The result is that s1 immediately starts spinning, causing the Semaphore's usage count to remain be...

Installing lxml is very easy, had become an easy jobs since Python 2.7.9 (because it comes with an utility which helps developers to download install dependency in an easy manner like Maven for Java) at first you have to run the command then start coding. pip install lxml The second way is to in...

Introduction Julia uses the following syntax for dictionaries: Dict({k₁ => v₁, k₂ => v₂, …, kₙ₋₁ => vₙ₋₁, kₙ => vₙ) While Python and JSON looks like this: {k₁: v₁, k₂: v₂, …, kₙ₋₁: vₙ₋₁, kₙ: vₙ} For illustrative purposes we could also use this syntax in Julia and add new seman...

For loops can be really useful in TWIG, allowing the creation of data-dynamic web pages. Say we create a simple array of numbers: {% set array = "3,1,2" %} We can then iterate over the array and print out whatever we want. Any data within the array block will be outputted in relation ...

To create our own MessageBox control simply follow the guide below... Open up your instance of Visual Studio (VS 2008/2010/2012/2015/2017) Go to the toolbar at the top and click File -> New Project --> Windows Forms Application --> Give the project a name and then click ok. O...