litejs/lib/algo/shuffle.js

module.exports = knuthShuffle

function knuthShuffle(arr) {
	for (var rnd, tmp, i = arr.length; i--; ) {
		tmp = arr[rnd = (i + 1) * Math.random() | 0]
		arr[rnd] = arr[i]
		arr[i] = tmp
	}
	return arr
}