There are various methods to verify whether an array is empty or undefined in JavaScript. 1. Using if Statement The simplest method to check if an array is empty or undefined is by using a basic if statement. You can test the array’s existence and its length. 2. Using Optional Chaining (?.) Optional chaining (?.)…
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There are various methods to remove objects from an array in JavaScript. 1. Using Array filter() Method The filter() method is a functional way to remove an object from an array. It creates a new array containing only the elements that meet a specified condition. 2. Using Array splice() Method The splice() method modifies the…
Given an array, the task is to check whether an item exists in a JavaScript array. There are several methods to determine if an item is present. 1. Using Array includes() Method The includes() method is the simplest way to check if a value exists in an array. It works for arrays of primitive values…
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There are multiple approaches to finding the sum of an array of numbers in JavaScript. 1. Using for Loop The for loop is a basic and widely used approach to sum the elements of an array. Initialize a variable to store the sum and iterate through the array, adding each element to the sum. 2….
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Flattening an array means converting a multi-dimensional array (an array containing nested arrays) into a single-dimensional array. There are different ways to Merge or flatten an array of arrays into a single array. Examples 1. Using Array flat() Method (ES2019) The flat() method is a built-in function introduced in ES2019 (ES10) that flattens an array…
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Given an array, the task is to replace an item in a JavaScript array. There are multiple ways to replace an item in an array in JavaScript. 1. Using Array splice() Method The splice() method is used to remove, replace, or insert elements into an array at a specified index. 2. Using Array map() Method…
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Given an Array with elements, the task is to copy the array by value in JavaScript. There are different ways to copy arrays by value in JavaScript. Understanding Reference vs Value JavaScript arrays are objects. When assigning an array to another variable, you copy the reference, not the actual array. Modifying one will affect the…
Given an array, the task is to get the last item of an array in JavaScript. There are several ways to get the last item of an array. 1. Using Bracket Notation Arrays in JavaScript are zero-indexed, meaning the first item is at index 0. You can use the length of the array to calculate…
There are several methods to check if a variable is an array or not. In this article, we will explore all methods with code examples and explanations. 1. Using Array.isArray() Method The basic method to check if a variable is an array or not is by using the Array.isArray() method. It is a built-in JavaScript…
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No, we cannot directly use break in forEach. However, there are workarounds and alternative solutions that allow you to achieve similar functionality. 1. Why Can’t You Use break in forEach? The forEach method is designed to iterate over each element of an array without providing a direct way to terminate the loop. Unlike traditional for…