original_string: public function get_col($x = 0, $query = ''){
          if( !$query ){
              $query = $this->build_query();
          }
          $this->clear();
          return $this->db->get_col($query, $x);
      }
code: public function get_col($x = 0, $query = ''){
          if( !$query ){
              $query = $this->build_query();
          }
          $this->clear();
          return $this->db->get_col($query, $x);
      }
code_tokens: public function get_col ( $ x = 0 , $ query = '' ) { if ( ! $ query ) { $ query = $ this -> build_query ( ) ; } $ this -> clear ( ) ; return $ this -> db -> get_col ( $ query , $ x ) ; }
docstring: Returns specified column as array
  
  @param int $x
  @param string $query
  @return array
docstring_tokens: Returns specified column as array