2635. Apply Transform Over Each Element in Array

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. Example 1: Input: arr = [1,2,3], fn = function plusone(n) { return n + 1; } Output: [2,3,4] Explanation: const newArray = map(arr, plusone