JBZoo\Utils\Arr::map PHP Method

    public static function map($function, $array)
    {
        $result = array();
        foreach ($array as $key => $value) {
            if (is_array($value)) {
                $result[$key] = self::map($function, $value);
            } else {
                $result[$key] = call_user_func($function, $value);
            }
        }
        return $result;
    }

 public function testMapRecursive()
 {
     $array = array(1, 2, 3, 4, 5);
     $result = Arr::map(function ($number) {
         return $number * $number;
     }, $array);
     is(array(1, 4, 9, 16, 25), $result);
     $array = array(1, 2, 3, 4, 5, array(6, 7, array(8, array(array(array(9))))));
     $result = Arr::map(function ($number) {
         return $number * $number;
     }, $array);
     is(array(1, 4, 9, 16, 25, array(36, 49, array(64, array(array(array(81)))))), $result);
 }