Function shuffle

MathBox/mathbox-bundle.js:39000–39011

* Creates an array of shuffled values, using a version of the Fisher-Yates * shuffle. See http://en.wikipedia.org/wiki/Fisher-Yates_shuffle. * * @static * @memberOf _ * @category Collections * @param {Array|Object|string} collection The collection to shuffle. * @re

(collection)

     * // => [4, 1, 6, 3, 5, 2]
     */
    function shuffle(collection) {
      var index = -1,
          length = collection ? collection.length : 0,
          result = Array(typeof length == 'number' ? length : 0);

      forEach(collection, function(value) {
        var rand = baseRandom(0, ++index);
        result[index] = result[rand];
        result[rand] = value;
      });
      return result;
    }

    /**
     * Gets the size of the `collection` by returning `collection.length` for arrays