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

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

   No documentation available.

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

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

   No documentation available.

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

   streaming	Streaming.Prelude

   The catMaybes function takes a Stream of Maybes and returns a Stream of all of the Just values. concat has the same behavior, but is more general; it works for any foldable container type.

4. 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.

5. 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.

6. catMaybes :: Filterable f => f (Maybe a) -> f a

   witherable	Witherable

   catMaybes ≡ mapMaybe id
   

7. forMaybe :: (Witherable t, Applicative f) => t a -> (a -> f (Maybe b)) -> f (t b)

   witherable	Witherable

   forMaybe = flip wither
   

8. imapMaybe :: FilterableWithIndex i t => (i -> a -> Maybe b) -> t a -> t b

   witherable	Witherable

   No documentation available.

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

   witherable	Witherable

   Like mapMaybe.

10. cmapMaybe :: forall (m :: Type -> Type) a b . Applicative m => (a -> Maybe b) -> LogAction m b -> LogAction m a

    co-log-core	Colog.Core.Action

    cmap for convertions that may fail

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