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1. mapLeft :: (a -> c) -> Either a b -> Either c b

   extra	Extra

   The mapLeft function takes a function and applies it to an Either value iff the value takes the form Left _.

   mapLeft show (Left 1) == Left "1"
   mapLeft show (Right True) == Right True
   

2. mapMaybeM :: Monad m => (a -> m (Maybe b)) -> [a] -> m [b]

   extra	Extra

   A version of mapMaybe that works with a monadic predicate.

3. mapRight :: (b -> c) -> Either a b -> Either a c

   extra	Extra

   The mapRight function takes a function and applies it to an Either value iff the value takes the form Right _.

   mapRight show (Left 1) == Left 1
   mapRight show (Right True) == Right "True"
   

4. mapPair :: Applicative f => (a -> f c, b -> f d) -> (a, b) -> f (c, d)

   utility-ht	Control.Applicative.HT

   No documentation available.

5. mapTriple :: Applicative m => (a -> m d, b -> m e, c -> m f) -> (a, b, c) -> m (d, e, f)

   utility-ht	Control.Applicative.HT

   No documentation available.

6. mapFst :: Functor f => (a -> f c) -> (a, b) -> f (c, b)

   utility-ht	Control.Functor.HT

   No documentation available.

7. mapFst3 :: Functor f => (a -> f d) -> (a, b, c) -> f (d, b, c)

   utility-ht	Control.Functor.HT

   No documentation available.

8. mapSnd :: Functor f => (b -> f c) -> (a, b) -> f (a, c)

   utility-ht	Control.Functor.HT

   No documentation available.

9. mapSnd3 :: Functor f => (b -> f d) -> (a, b, c) -> f (a, d, c)

   utility-ht	Control.Functor.HT

   No documentation available.

10. mapThd3 :: Functor f => (c -> f d) -> (a, b, c) -> f (a, b, d)

    utility-ht	Control.Functor.HT

    No documentation available.

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