Module Data.Tuple.Extra

first :: (a -> b) -> (a,c) -> (b,c)   

Apply a function to the first component of a tuple.

second :: (a -> b) -> (c,a) -> (c,b)   

Apply a function to the second component of a tuple.

(***) :: (a -> b) -> (c -> d) -> (a,c) -> (b,d)   

Apply two functions to the two components of a tuple.

(&&&) :: (a -> b) -> (a -> c) -> a -> (b,c)   

Apply two functions to a value and returns a tuple of the results.

both :: (a -> b) -> (a,a) -> (b,b)   

Apply a function to both components of a tuple.