function shuffle(collection) {
      collection = toIterable(collection);

      var index = -1,
          length = collection.length,
          result = Array(length);

      while (++index < length) {
        var rand = baseRandom(0, index);
        if (index != rand) {
          result[index] = result[rand];
        }
        result[rand] = collection[index];
      }
      return result;
    }
Creates an array of shuffled values, using a version of the Fisher-Yates
shuffle. See [Wikipedia](http://en.wikipedia.org/wiki/Fisher-Yates_shuffle)
for more details.

@static
@memberOf _
@category Collection
@param {Array|Object|string} collection The collection to shuffle.
@returns {Array} Returns the new shuffled array.
@example

_.shuffle([1, 2, 3, 4]);
// => [4, 1, 3, 2]