Granada\ORM::_normalise_select_many_columns PHP Method

    protected function _normalise_select_many_columns($columns)
    {
        $return = array();
        foreach ($columns as $column) {
            if (is_array($column)) {
                foreach ($column as $key => $value) {
                    if (!is_numeric($key)) {
                        $return[$key] = $value;
                    } else {
                        $return[] = $value;
                    }
                }
            } else {
                $return[] = $column;
            }
        }
        return $return;
    }