Hoogle Search

Within LTS Haskell 24.6 (ghc-9.10.2)

Note that Stackage only displays results for the latest LTS and Nightly snapshot. Learn more.

Exact lookup

1. mapMaybeWithKey :: (k -> v1 -> Maybe v2) -> InsOrdHashMap k v1 -> InsOrdHashMap k v2

   insert-ordered-containers	Data.HashMap.Strict.InsOrd

   No documentation available.

2. mapM_ :: Monad m => (a -> m x) -> Stream (Of a) m r -> m r

   streaming	Streaming.Prelude

   Reduce a stream to its return value with a monadic action.

   >>> S.mapM_ Prelude.print $ each [1..3]
   1
   2
   3
   

   >>> rest <- S.mapM_ Prelude.print $ S.splitAt 3 $ each [1..10]
   1
   2
   3
   
   >>> S.sum rest
   49 :> ()
   

3. mapMaybe :: forall (m :: Type -> Type) a b r . Monad m => (a -> Maybe b) -> Stream (Of a) m r -> Stream (Of b) m r

   streaming	Streaming.Prelude

   The mapMaybe function is a version of map which can throw out elements. In particular, the functional argument returns something of type Maybe b. If this is Nothing, no element is added on to the result Stream. If it is Just b, then b is included in the result Stream.

4. mapMaybeM :: Monad m => (a -> m (Maybe b)) -> Stream (Of a) m r -> Stream (Of b) m r

   streaming	Streaming.Prelude

   Map monadically over a stream, producing a new stream only containing the Just values.

5. mapMaybe :: Filterable f => (a -> Maybe b) -> f a -> f b

   witherable	Witherable

   Like mapMaybe.

6. mapM_ :: (Foldable t, Monad m) => (a -> m b) -> t a -> m ()

   base-compat-batteries	Control.Monad.Compat

   Map each element of a structure to a monadic action, evaluate these actions from left to right, and ignore the results. For a version that doesn't ignore the results see mapM. mapM_ is just like traverse_, but specialised to monadic actions.

7. mapM_ :: Monad m => (time -> m ()) -> (body -> m ()) -> T time body -> m ()

   event-list	Data.EventList.Absolute.TimeBody

   No documentation available.

8. mapMaybe :: Num time => (body0 -> Maybe body1) -> T time body0 -> T time body1

   event-list	Data.EventList.Absolute.TimeBody

   No documentation available.

9. mapM_ :: Monad m => (time -> m ()) -> (body -> m ()) -> T time body -> m ()

   event-list	Data.EventList.Absolute.TimeTime

   No documentation available.

10. mapMaybe :: Num time => (body0 -> Maybe body1) -> T time body0 -> T time body1

    event-list	Data.EventList.Absolute.TimeTime

    No documentation available.

Page 29 of many | Previous | Next