Tutorial by Examples: u

HTML <p>This is a nice </p> <p>I like </p> <ul> <li>List item 1</li> <li>List item 2</li> <li>List item 3</li> </ul> <button id="btn-1">Append text</button> <button id="btn-2&quot...

├───models │ ├───user.model.js ├───routes │ ├───user.route.js ├───services │ ├───user.service.js ├───controllers │ ├───user.controller.js For modular code structure the logic should be divided into these directories and files. Models - The schema definition of the Model Rou...

user.model.js var mongoose = require('mongoose') const UserSchema = new mongoose.Schema({ name: String }) const User = mongoose.model('User', UserSchema) module.exports = User; user.routes.js var express = require('express'); var router = express.Router(); var UserController...

If the promise doesn't return anything, the async task can be completed using await. try{ await User.findByIdAndUpdate(user._id, { $push: { tokens: token } }).exec() }catch(e){ handleError(e) }

1. For Loop: CountriesName = ["India", "Canada", "America", "Iraq"] for country in CountriesName puts country end 2. Each Iterator: Same set of work can be done with each loop which we did with for loop. CountriesName = ["India", "C...

Tables are most easily included with the DT package, which is an R interface to the JavaScript library DataTables. library(shiny) library(DT) ui <- fluidPage( dataTableOutput('myTable') ) server <- function(input, output, session){ output$myTable <- renderDataTable({ dat...

reactiveValues can be used to store objects, to which other expressions can take a dependency. In the example below, a reactiveValues object is initialized with value "No text has been submitted yet.". A separate observer is created to update the reactiveValues object whenever the submit ...

Valgrind is GPLv2-licensed collection of dynamic analysis tools, which uses binary instrumentation (dynamic recompilation). Six tools are included to detect memory management (Memcheck) and threading errors (Helgrind and DRD), to generate call-graph and profile programs (with optional cache and bran...

One can use the command-line launching facility is when one wants to customize some aspects of the way MySQL Workbench operates. MySQL Workbench has the following common command line options: --admin instance - Launch MySQL Workbench and load the server instance specified. --query connection - ...

/app/i18n/<Vendor Namespace>/<language package directory>/composer.json { "name": "<vendor namespance>/<language package directory>", "description": "<language package description>", "version": "100....

Here i will show you how to fetch All parent(configuarble products) A parent product and all of its children.

We will start by making a simple class that gets all our parent(Configurable products) <?php namespace Test\Test\Controller\Test; use Magento\Framework\App\Action\Context; class Products extends \Magento\Framework\App\Action\Action { public function __construct( \...

Here we first fetch our parent product and the we will get all children products that this parent have. <?php namespace Test\Test\Controller\Test; use Magento\Framework\App\Action\Context; class Products extends \Magento\Framework\App\Action\Action { public function __cons...

Variables inside functions is inside a local scope like this $number = 5 function foo(){ $number = 10 return $number } foo(); //Will print 10 because text defined inside function is a local variable

There are 3 usages of the $ character in a DOSKEY macro. Command separator $T is the equivalent of & in a batch script. One can join commands together like so. DOSKEY test=echo hello $T echo world Command-line arguments Like bash(not batch), we use $ to indicate command-line argument....

class AppDelegate: UIResponder, UIApplicationDelegate { var window: UIWindow? var firstTabNavigationController : UINavigationController! var secondTabNavigationControoller : UINavigationController! var thirdTabNavigationController : UINavigationController! var fourth...

Use .click() to simulate click Here is a code sample to click search button on Bing website private async void SimulateClickAsync() { var functionString = string.Format(@"document.getElementsByClassName('b_searchboxSubmit')[0].click();"); await webView.InvokeScriptAsync("...

This example shows how mouse event is used in QML. import QtQuick 2.7 import QtQuick.Window 2.2 Window { visible: true Rectangle { anchors.fill: parent width: 120; height: 240 color: "#4B7A4A" MouseArea { anchors.fill: paren...

var number1 = 5; number1 = 3; Here, we defined a number called "number1" which was equal to 5. However, on the second line, we changed the value to 3. To show the value of a variable, we log it to the console or use window.alert(): console.log(number1); // 3 window.alert(number1); //...

Creating an Snackbar without the need pass view to Snackbar, all layout create in android in android.R.id.content. public class CustomSnackBar { public static final int STATE_ERROR = 0; public static final int STATE_WARNING = 1; public static final int STATE_SUCCESS = 2; publi...