Graph::AssociativeKeys PHP 메소드

    protected function AssociativeKeys()
    {
        if ($this->force_assoc) {
            return true;
        }
        $values = $this->GetValues();
        foreach (array_keys($values) as $k) {
            if (!is_integer($k)) {
                return true;
            }
        }
        return false;
    }