gistfile1.txt

/**
 * Randomly reorders the contents of an array in place.
 * @author blixt (https://github.com/blixt)
 * @param {Array.<Object>} arr An array.
 * @returns {Array.<Object>} The same array that was passed in,
 *    now shuffled.
 */
function shuffleArray(arr) {
  
  var i, j, item;

  for (i = arr.length - 1; i > 0; i--) {
    j = Math.round(Math.random() * i);
    item = arr[i];
    arr[i] = arr[j];
    arr[j] = item;
  }
  return arr;
}