array_shuffle() for GameMaker Studio 2.3.1

// Adds to GMS2.3.1's new "array_" functions. // Based of Fisher-Yates Shuffle https://bost.ocks.org/mike/shuffle/ function array_shuffle(_array) { var _len = array_length(_array), _last = 0, _i = 0; while(_len) { _i = irandom(--_len); _last = _array[_len]; _array[_len] = _array[_i]; _array[_i] = _last; } return _array; }