In JavaScript, objects are a powerful data structure, often used to store collections of key-value pairs. A common task when working with objects is checking whether a specific key exists in an object. There are several approaches to check if a key exists in a JavaScript object. 1. Using in Operator The in operator is…
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JavaScript provides several ways to loop through arrays. Whether you need to iterate over the array’s elements, modify data, or perform some action for each item, understanding the various looping mechanisms available is essential. This article will walk you through all the common and modern approaches to loop through arrays in JavaScript, explaining each method…
In JavaScript, there are several approaches to checking whether an object is an array or not. 1. Using Array.isArray() Method (Recommended) The most reliable and modern way to check if an object is an array in JavaScript is by using the Array.isArray() method. This method was introduced in ECMAScript 5 (ES5) and is widely supported…
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There are various ways to append elements to an array in JavaScript. Appending elements to an array is an essential operation while working with an array. 1. Using push() Method The push() method is the most basic and widely used way to append an item (or multiple items) to the end of an array. You…
There are various methods to remove duplicate elements from a JavaScript array and get all unique values. Sometimes when working with data, it is useful to get unique values from the JavaScript array (remove duplicates). 1. Using Set (Simple Approach) The simplest and most useful way to remove duplicates from an array is by utilizing…
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There are several ways to remove duplicate elements from JavaScript array. It is useful while working with data that have many repetitive values. 1. Using a Set The simplest and most efficient ways to remove duplicates from an array in JavaScript is by using the Set object. A Set is a built-in data structure in…
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In JavaScript, there are several ways to create an array containing numbers from 1 to N. 1. Using a for Loop The basic method is to create an array of numbers is by using a for loop. Explanation 2. Using Array.from() Method The Array.from() method creates a new array from an array-like or iterable object….
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JavaScript 2D Array (Two-Dimensional Array in JavaScript) is a data structure that is used to store elements in a grid-like fashion using rows and columns. It can be visualized as an array of arrays, where each inner array represents a row. 2D arrays are useful in scenarios like representing matrices, tables, or grids in a…
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Identity Card is an official document used to verify a person’s identity. It contains details like name, Address, Date of Birth, Photo, etc. Any Government or Private workplace, school or organization can issue identity cards. In this article, we will learn how to design an Identity Card with HTML and CSS. We will see a…
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Given an array and index, the task is to insert a particular item at a given index. There are multiple ways to insert an item into an array at a specific index in JavaScript. 1. Using splice() Method The splice() method is used to modify the original array. This method can be used to insert,…
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