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Within LTS Haskell 24.39 (ghc-9.10.3)

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

    streamly-core Streamly.Internal.Data.Stream

    Execute a monadic action for each element of the Stream

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

    streamly-core Streamly.Internal.Data.Stream

    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.catMaybes . fmap f
    

  3. mapMaybeM :: Monad m => (a -> m (Maybe b)) -> Stream m a -> Stream m b

    streamly-core Streamly.Internal.Data.Stream

    Like mapMaybe but maps a monadic function. Equivalent to:

    >>> mapMaybeM f = Stream.catMaybes . Stream.mapM f
    
    >>> mapM f = Stream.mapMaybeM (\x -> Just <$> f x)
    

  4. mapM :: Monad m => (a -> m b) -> StreamK m a -> StreamK m b

    streamly-core Streamly.Internal.Data.StreamK

    No documentation available.

  5. mapMSerial :: Monad m => (a -> m b) -> StreamK m a -> StreamK m b

    streamly-core Streamly.Internal.Data.StreamK

    No documentation available.

  6. mapMWith :: (m b -> StreamK m b -> StreamK m b) -> (a -> m b) -> StreamK m a -> StreamK m b

    streamly-core Streamly.Internal.Data.StreamK

    No documentation available.

  7. mapM_ :: Monad m => (a -> m b) -> StreamK m a -> m ()

    streamly-core Streamly.Internal.Data.StreamK

    Apply a monadic action to each element of the stream and discard the output of the action.

  8. mapMaybe :: forall a b (m :: Type -> Type) . (a -> Maybe b) -> StreamK m a -> StreamK m b

    streamly-core Streamly.Internal.Data.StreamK

    No documentation available.

  9. map2 :: forall (m :: Type -> Type) a b c . Functor m => (a -> b -> c) -> Unfold m a b -> Unfold m a c

    streamly-core Streamly.Internal.Data.Unfold

    >>> map2 f = Unfold.mapM2 (\a b -> pure (f a b))
    
    Note that the seed may mutate (e.g. if the seed is a Handle or IORef) as stream is generated from it, so we need to be careful when reusing the seed while the stream is being generated from it.

  10. mapM :: Monad m => (b -> m c) -> Unfold m a b -> Unfold m a c

    streamly-core Streamly.Internal.Data.Unfold

    Apply a monadic function to each element of the stream and replace it with the output of the resulting action.

    >>> mapM f = Unfold.mapM2 (const f)
    

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