What is the purpose of index in the following code?

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JavaScript

const array = ['asad', 'ikhlas', 'umair']

const filterArray = array.filter((elem, index) => {
    return elem === 'asad'
})  

console.log(filterArray)

what is the purpose of index in the above code?

What I have tried:

i have tried but failed to understand

Posted 6-Jan-21 18:03pm

Syed Zeyad

Updated 6-Jan-21 19:56pm

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OriginalGriff · Answer 1 · 2021-01-06T19:56:00

Solution 1

It's an optional parameter that provides the index to the element being processed if you need it: Array.prototype.filter() - JavaScript | MDN[^]
Your code doesn't use it, so you can remove it from the callback if you want.

Posted 6-Jan-21 19:56pm

OriginalGriff