public function getColNames()
    {
        $colNames = array();
        foreach ($this->_array as $row) {
            foreach (array_keys($row) as $key) {
                if (!is_numeric($key) && !isset($colNames[$key])) {
                    $colNames[$key] = $key;
                }
            }
        }
        return $colNames;
    }
public function getColNames()
    {
        $colNames = array();
        foreach ($this->_array as $row) {
            foreach (array_keys($row) as $key) {
                if (!is_numeric($key) && !isset($colNames[$key])) {
                    $colNames[$key] = $key;
                }
            }
        }
        return $colNames;
    }
public function getColNames ( ) { $ colNames = array ( ) ; foreach ( $ this -> _array as $ row ) { foreach ( array_keys ( $ row ) as $ key ) { if ( ! is_numeric ( $ key ) && ! isset ( $ colNames [ $ key ] ) ) { $ colNames [ $ key ] = $ key ; } } } return $ colNames ; }
Column names getter.

@return array
Column names getter .