Knuth Shuffle algorithm

knuthShuffle.js

function knuthShuffle(arr) {
  let currentIndex = arr.length;
  let temporaryValue, randomIndex;

  while (0 !== currentIndex) {
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex--;

    temporaryValue = arr[currentIndex];
    arr[currentIndex] = arr[randomIndex];
    arr[randomIndex] = temporaryValue;
  }

  return arr;
}