Predis\Command\ZSetUnionStore::filterArguments PHP Метод

    protected function filterArguments(array $arguments)
    {
        $options = array();
        $argc = count($arguments);
        if ($argc > 2 && is_array($arguments[$argc - 1])) {
            $options = $this->prepareOptions(array_pop($arguments));
        }
        if (is_array($arguments[1])) {
            $arguments = array_merge(array($arguments[0], count($arguments[1])), $arguments[1]);
        }
        return array_merge($arguments, $options);
    }