Shuffle

shuffle.js

function getRandom(arr, lastIndex) {
  var index, size, distance;
  size = arr.length;
  do {
    index = parseInt(Math.random() * size);
    distance = Math.abs(index - lastIndex);
  } while(size > 5 && distance < size / 3);
  return index;
}

var originalArray = [];
for (i=0; i < 100; i++) {
  originalArray[i] = i;
}

var arrayCopy = originalArray.slice(0);
var lastIndex = arrayCopy.length;
var elem;

while (arrayCopy.length > 0) {
    index = getRandom(arrayCopy, lastIndex);
    elem = arrayCopy.splice(index, 1);
    lastIndex = index;
    console.log(elem);
}