DEV Community

Cover image for Compare two arrays - JavaScript
syedsimanta03
syedsimanta03

Posted on

Compare two arrays - JavaScript

#javascript #react

// a and b are arrays
const isEqual = (a, b) => JSON.stringify(a) === JSON.stringify(b);

// Or
const isEqual = (a, b) => a.length === b.length && a.every((v, i) => v === b[i]);

// Examples
isEqual([1, 2, 3], [1, 2, 3]); // true
isEqual([1, 2, 3], [1, '2', 3]); // false

Top comments (1)

Collapse
 
bugb profile image
bugb • • Edited

Try this:

For 1st:

isEqual([()=>{}],[()=>{2}])
isEqual([NaN],[null])
//....
// expect false but true
Enter fullscreen mode Exit fullscreen mode

For 2nd:

isEqual([NaN],[NaN])

// what is your expectation?
Enter fullscreen mode Exit fullscreen mode

Read next

arindam_1729 profile image

Building a Kanban Board with Next.js,Vercel AI and Tolgee

Arindam Majumder -

anwarhossain1 profile image

Why Strong DSA Knowledge is Essential for Software Engineers

Anwar Hossain -

amaresh_adak profile image

Creating a Dynamic Product Showcase Carousel with React and Tailwind CSS

Amaresh Adak -

gladiatorsbattle profile image

Top 10 JavaScript Frameworks to Use in 2024: An In-Depth Guide

Gladiators Battle -