Source: util/shuffle.js

/**
 * shuffle - Shuffles an array
 *
 * @param  {Array} array The array to shuffle
 * @returns {Array} The shuffled array
 */
function shuffle(array) {
  let currentIndex = array.length, temporaryValue, randomIndex;
  // While there remain elements to shuffle...
  while (0 !== currentIndex) {
    // Pick a remaining element...
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex -= 1;
    // And swap it with the current element.
    temporaryValue = array[currentIndex];
    array[currentIndex] = array[randomIndex];
    array[randomIndex] = temporaryValue;
  }
  return array;
}
module.exports = shuffle;