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var x = 5; var str = "if (x == 5) {console.log('z is 42'); z = 42;} else z = 0; "; console.log("z is ", eval(str)); The use of eval is strongly discouraged. See the Remarks section for details.

import { NgModule, CUSTOM_ELEMENTS_SCHEMA } from '@angular/core'; import { CommonModule } from '@angular/common'; import { AboutComponent } from './about.component'; @NgModule({ imports: [ CommonModule ], declarations: [ AboutComponent ], exports: [ AboutComponent ], schemas...

import { Component } from '@angular/core'; @Component({ selector: 'myapp-about', template: `<my-webcomponent></my-webcomponent>` }) export class AboutComponent { }

Installation $ npm install gulp-jslint --save-dev Usage In gulpfile.js add: var gulp = require('gulp'); var jslint = require('gulp-jslint'); gulp.task('lint', function(){ return gulp.src(['source.js']) .pipe(jslint({ /* this object represents the JSLint directives being passe...

Aggregation is used to perform complex data search operations in the mongo query which can't be done in normal "find" query. Create some dummy data: db.employees.insert({"name":"Adma","dept":"Admin","languages":["german","f...

When defining a new trait it is possible to enforce that types wishing to implement this trait verify a number of constraints or bounds. Taking an example from the standard library, the DerefMut trait requires that a type first implement its sibling Deref trait: pub trait DerefMut: Deref { fn...

An easy way to get an input from a user is by using the prompt() method. Syntax prompt(text, [default]); text: The text displayed in the prompt box. default: A default value for the input field (optional). Examples var age = prompt("How old are you?"); console.log(age); // Pri...

import pygame file = 'some.mp3' pygame.init() pygame.mixer.init() pygame.mixer.music.load(file) pygame.mixer.music.play(-1) # If the loops is -1 then the music will repeat indefinitely.

import pygame import time pygame.mixer.init() pygame.display.init() screen = pygame.display.set_mode ( ( 420 , 240 ) ) playlist = list() playlist.append ( "music3.mp3" ) playlist.append ( "music2.mp3" ) playlist.append ( "music1.mp3" ) pygame.mixer.musi...

By default, PHP Curl supports GET and POST requests. It is possible to also send custom requests, such as DELETE, PUT or PATCH (or even non-standard methods) using the CURLOPT_CUSTOMREQUEST parameter. $method = 'DELETE'; // Create a DELETE request $ch = curl_init($url); curl_setopt($ch, CURLOPT...

To install PHP on Ubuntu, first install the Redis server: sudo apt install redis-server then install the PHP module: sudo apt install php-redis And restart the Apache server: sudo service apache2 restart

The Redis PHP module gives access to the same commands as the Redis CLI client so it is quite straightforward to use. The syntax is as follow: // Creates two new keys: $redis->set('mykey-1', 123); $redis->set('mykey-2', 'abcd'); // Gets one key (prints '123') var_dump($redis->get('m...

Sometimes we need cross domain request for our API's in laravel. We need to add appropriate headers to complete the cross domain request successfully. So we need to make sure that whatever headers we are adding should be accurate otherwise our API's become vulnerable. In order to add headers we nee...

This is an example of using until/retries/delay to implement an alive check for a webapp that is starting up. It assumes that there will be some period of time (up to 3 minutes) where the webapp is refusing socket connections. After that, it checks the /alive page for the word "OK". It als...

For small functions that get called often, the overhead associated with the function call can be a significant fraction of the total execution time of that function. One way of improving performance, then, is to eliminate the overhead. In this example we use four functions (plus main()) in three so...

Before install this extension, you must install yii2-app. In this example, I use yii2-basic template. Guide for installation in here. Run composer require --prefer-dist yiisoft/yii2-authclient or add "yiisoft/yii2-authclient": "~2.1.0" to the require section of your comp...

Add button Login as facebook account to your login view: Edit site/login.php in views folder, add theses line to content of page login: <?= yii\authclient\widgets\AuthChoice::widget([ 'baseAuthUrl' => ['site/auth'], 'popupMode' => false, ]) ?> Above, we set that aut...

If you enable prettyUrl in your yii2-app, your redirect_uri will be: http://<base_url>/web/site/auth And disable pretty url: http://<base_url>/web/index.php?r=site%2Fauth Example:

/** * @param $client ClientInterface */ public function onAuthSuccess($client) { //Get user info /** @var array $attributes */ $attributes = $client->getUserAttributes(); $email = ArrayHelper::getValue($attributes, 'email'); //email info $id = ArrayHelper::getValue(...

Persistence is created in docker containers using volumes. Let's create a Limesurvey container and persist the database, uploaded content and configuration in a named volume: docker volume create --name mysql docker volume create --name upload docker run -d --name limesurvey -v mysql:/var/lib/m...