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1. mapM_ :: Monad m => (a -> m b) -> SerialT m a -> m ()

   streamly	Streamly.Internal.Data.Stream.IsStream

   mapM_ = Stream.drain . Stream.mapM
   

   Apply a monadic action to each element of the stream and discard the output of the action. This is not really a pure transformation operation but a transformation followed by fold.

2. mapMaybe :: forall t (m :: Type -> Type) a b . (IsStream t, Monad m) => (a -> Maybe b) -> t m a -> t m b

   streamly	Streamly.Internal.Data.Stream.IsStream

   Map a Maybe returning function to a stream, filter out the Nothing elements, and return a stream of values extracted from Just. Equivalent to:

   mapMaybe f = Stream.map fromJust . Stream.filter isJust . Stream.map f
   

3. mapMaybeM :: (IsStream t, MonadAsync m, Functor (t m)) => (a -> m (Maybe b)) -> t m a -> t m b

   streamly	Streamly.Internal.Data.Stream.IsStream

   Like mapMaybe but maps a monadic function. Equivalent to:

   mapMaybeM f = Stream.map fromJust . Stream.filter isJust . Stream.mapM f
   

   Concurrent (do not use with fromParallel on infinite streams)

4. mapM_ :: Monad m => (a -> m b) -> SerialT m a -> m ()

   streamly	Streamly.Prelude

   mapM_ = Stream.drain . Stream.mapM
   

   Apply a monadic action to each element of the stream and discard the output of the action. This is not really a pure transformation operation but a transformation followed by fold.

5. mapMaybe :: forall t (m :: Type -> Type) a b . (IsStream t, Monad m) => (a -> Maybe b) -> t m a -> t m b

   streamly	Streamly.Prelude

   Map a Maybe returning function to a stream, filter out the Nothing elements, and return a stream of values extracted from Just. Equivalent to:

   mapMaybe f = Stream.map fromJust . Stream.filter isJust . Stream.map f
   

6. mapMaybeM :: (IsStream t, MonadAsync m, Functor (t m)) => (a -> m (Maybe b)) -> t m a -> t m b

   streamly	Streamly.Prelude

   Like mapMaybe but maps a monadic function. Equivalent to:

   mapMaybeM f = Stream.map fromJust . Stream.filter isJust . Stream.mapM f
   

   Concurrent (do not use with fromParallel on infinite streams)

7. mapMaybe :: (a -> Maybe b) -> [a] -> [b]

   strict-base-types	Data.Maybe.Strict

   Analogous to mapMaybe in Data.Maybe.

8. mapM_ :: (Monad m, Unboxable a) => (a -> m b) -> Vector a -> m ()

   unboxing-vector	Data.Vector.Unboxing

   No documentation available.

9. mapMaybe :: (Unboxable a, Unboxable b) => (a -> Maybe b) -> Vector a -> Vector b

   unboxing-vector	Data.Vector.Unboxing

   No documentation available.

10. mapMaybe :: Interval k e => (a -> Maybe b) -> IntervalMap k a -> IntervalMap k b

    IntervalMap	Data.IntervalMap.Generic.Lazy

    O(n). Map values and collect the Just results.

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