1. forEach() Function The forEach() method is used to execute a provided function once for each element in an array. It does not return a new array; it simply iterates over the array. Syntax: array.forEach(callback(currentValue, index, array)); cal...
Filter The filter method creates a new array with all elements that pass a test implemented by the provided function. It doesn't change the original array but returns a new one based on the specified condition. Example: const products = [ { id: 1, ...
Expert-Level Explanation Array methods in JavaScript are functions that can be used to perform operations on arrays. These include map, filter, reduce, and forEach, each serving a different purpose. Creative Explanation Think of array methods as diff...
Introduction A function that can take another function as an argument, or that returns a function as a result, is known as a Higher-Order Function(HOF). They are a special type of function that can be used to create more complex and powerful funct...
1. What is a map()? In a very crude definition, in JavaScript, the .map() function goes through each item in a list (called an array). It makes some changes to each item and gives you a new list with those changed items. 2. Why is it required? The pu...
💡 In this article, you will learn more about Mapping, how it makes the project easier, and how it can be reused. I had a hard time understanding JavaScript's mapping functions until I came across a project using React (a JavaScript framework). Thr...
Overview: JavaScript is a powerful programming language that provides developers with many built-in functions that can help the developer to manipulate data in many different ways. Three of these functions are map(), filter(), and reduce(). In this b...
Interview Question: If you can guess the output of the below code successfully then you can skip this blog :) Code: let input_array=[1,6,3,7,9,2]; let updated_array=input_array.map((element)=>{ return element<4; }) console.log(updated_array); If...
A map is a collection of elements where each element is stored as a Key, value pair. It remembers the original insertion order of the keys. A key in the Map may only occur once; it is unique in the Map's collection. Iteration happens in insertion ord...
Definition: - In JavaScript, Map is a data structure that allows us to store key-value pairs and both key and value can be of any data type, like objects, functions and many more. Maps can be considered similar to objects with some key differences. C...
