Lame JS puzzle #1

fb.screener.js

/*

We have an array of objects A and an array of indexes B. Reorder objects in array A with given indexes in array B. Do not change array A's length.

example:

var A = [C, D, E, F, G];
var B = [3, 0, 4, 1, 2];

sort(A, B);
// A is now [D, F, G, C, E];
*/

// TC O(n)
// SC O(n)

function sort(a, b) {
  for (let [i, v] of [...a].entries())
    a[b[i]] = v;
}

let A = ['C', 'D', 'E', 'F', 'G'];
let B = [3,0,4,1,2];
sort(A, B);
console.log(A);
// A is now [D, F, G, C, E];