Array.js

// Given an integer array arr and a mapping function fn, return a new array with a transformation applied to each element.

// The returned array should be created such that returnedArray[i] = fn(arr[i], i).

// Please solve it without the built-in Array.map method.

var map = function (arr, fn) {
    var result = [];
    arr.forEach((value, index) => {
        result.push(fn(value, index));
    })
    return result
}