Coding Challenge Practice - Question 30

The task is to reorder an array, given that we have an array of items and another array of indexes, so that A[i] is put at the index B[i].

The boilerplate code:

function sort(items, newOrder) {
  // reorder items inline
}

Create a copy of the array, so that the data isn't overwritten too early.

const copy = items.slice();

For each index in the copied array, move the item in that index to the original array, based on the index of the second array.

for (let i = 0; i < newLength.array; i++) {
   items[newOrder[i]] = copy[i];
}

The final code for the sort function:

function sort(items, newOrder) {
  // reorder items inline
  const copy = items.slice();

  for(let i = 0; i < newOrder.length; i++) {
    items[newOrder[i]] = copy[i]
  }
}

That's all folks!