scrambleArray.js

function scrambleArray(arr) {
  const tmpArray = Array.from(arr);
  const scrambledArray = new Array(arr.length).fill(1);
  let index = 0;
  while (tmpArray.length) {
    const randomIndex = Math.floor(Math.random() * (tmpArray.length - 1));
    scrambledArray[index++] = tmpArray.splice(randomIndex, 1)[0];
  }
  return scrambledArray;
}