Parkour\Traverse::reduce PHP Method

    public static function reduce(array $data, callable $cb, $memo)
    {
        foreach ($data as $key => $value) {
            $memo = call_user_func($cb, $memo, $value, $key);
        }
        return $memo;
    }

 /**
  *	Filters a value through a set of functions.
  *
  *	@param mixed $value Value.
  *	@param array $filters Filters.
  *	@return mixed Filtered value.
  */
 private function filter($value, array $filters)
 {
     return Traverse::reduce($filters, new Execute(), $value);
 }