function flip($key) {
		$ref=&$this->ref($key);
		return $ref=array_combine(array_values($ref),array_keys($ref));
	}
function flip($key) {
		$ref=&$this->ref($key);
		return $ref=array_combine(array_values($ref),array_keys($ref));
	}
function flip ( $ key ) { $ ref = & $ this -> ref ( $ key ) ; return $ ref = array_combine ( array_values ( $ ref ) , array_keys ( $ ref ) ) ; }
Swap keys and values of hive array variable
@return array
@param $key string
@public
Swap keys and values of hive array variable