In this article, we will be discussing a program to find the union and intersection of two given unsorted arrays.Let us denote the two arrays with ‘A’ and ‘B’. Then union of those arrays is denoted by A ∪ B which is basically an array of all the elements in ... Read More

Regardless of the programming language, memory life cycle is pretty much always the same −Allocate the memory you needUse the allocated memory (read, write)Release the allocated memory when it is not needed anymoreThe second part is explicit in all languages. Use of allocated memory needs to be done by the ... Read More

Regardless of the programming language, memory life cycle is pretty much always the same −Allocate the memory you needUse the allocated memory (read, write)Release the allocated memory when it is not needed anymoreThe second part is explicit in all languages. Use of allocated memory needs to be done by the ... Read More

In the JavaScript, Event Flow process is completed by three concepts −Event Target − The actual DOM object on which the event occured.Event Bubbling − Explained belowEvent Capturing − Explained belowEvent bubbling is the order in which event handlers are called when one element is nested inside a second element, ... Read More

The String object lets you work with a series of characters; it wraps Javascript's string primitive data type with a number of helper methods. As JavaScript automatically converts between string primitives and String objects, you can call any of the helper methods of the String object on a string primitive.Following ... Read More

The split([separator, [limit]]) method splits a String object into an array of strings by separating the string into substrings, using a specified separator string to determine where to make each split.Example usage of split methodlet a = "hello, hi, bonjour, namaste"; let greetings = a.split(', '); console.log(greetings)Output[ 'hello', 'hi', 'bonjour', ... Read More

Camel case is the practice of writing phrases such that each word or abbreviation in the middle of the phrase begins with a capital letter, with no intervening spaces or punctuation. For example, Concurrent hash maps in camel case would be written as −ConcurrentHashMapsWe can implement a method to accept ... Read More

Using for..in loops in JavaScript with array iteration is a bad idea because of the following behavior −Using normal iteration loops −Examplelet arr = [] arr[4] = 5 for (let i = 0; i < arr.length; i ++) {    console.log(arr[i]) }Outputundefined undefined undefined undefined 5If we had iterated over ... Read More

JavaScript classes, introduced in ES6, are syntactical sugar over JavaScript prototype-based inheritance. Classes are in fact "special functions". You can define classes in JavaScript using the class keyword using the following syntax −class Person {    // Constructor for this class    constructor(name) {       this.name = name; ... Read More

The \W metacharacter is used to find a non-word character.A word character is a character from a-z, A-Z, 0-9, including the _ (underscore) character.Example// Containing any non word character: console.log(/\W/.test(" ")) console.log(/\W/.test(".!@#")) // Not containing non word characters: console.log(/\W/.test("a")) console.log(/\W/.test("B")) console.log(/\W/.test("9")) console.log(/\W/.test("_"))Outputtrue true false false false falseRead More