code: public function execute(array $arguments) {
      	if (empty($arguments)) throw new \BadFunctionCallException("Modulus: No arguments found.");
      	if (!isset($arguments[1])) throw new \BadFunctionCallException("Modulus: At least 2 arguments are required");
          return $arguments[0] % $arguments[1];
      }
docs: Caculates the modulus between 2 values
  Usage: (mod -1 5)
  Returns: number
  (non-PHPdoc)
  @see \eMacros\Runtime\GenericFunction::execute()