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

heritech9 profile image

Week 4 Recap of #100DaysOfCode: From Creative CSS to JavaScript Adventures 🚀

heritech9 -

hassanazhar profile image

Detailed Comparison of Prettier, Biomejs, and VoidZero

Hassan Azhar -

riteshshukla04 profile image

Building React Native In-App Modules bypassing the JS bridge.

Ritesh Shukla -

micaavigliano profile image

Accessible components: Pagination

Mica -