Using map to iterate through two arrays

Question

Currently in React, I am using array.map(function(text,index){}) to iterate through an array. But, how am I going to iterate through two arrays simultaneously u

Answer 1

You can't do this with built-in Array.prototype methods, but you can use something like this:

function map2(arr1, arr2, func) {
    return arr1.map(
        (el, i) => { return func(el, arr2[i]); }
    );
}

(Of course, arr1 and arr2 are expected to have the same length)