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  1. (<$) :: (Functor f, Foldable f, Num b, Num (f a), Reifies s W) => BVar s b -> BVar s (f a) -> BVar s (f b)

    backprop Prelude.Backprop.Num

    Alias for fmapConst.

  2. (<$>) :: (Traversable f, Num a, Num b, Reifies s W) => (BVar s a -> BVar s b) -> BVar s (f a) -> BVar s (f b)

    backprop Prelude.Backprop.Num

    Alias for fmap.

  3. (<$) :: Functor f => a -> f b -> f a

    cabal-install-solver Distribution.Solver.Compat.Prelude

    Replace all locations in the input with the same value. The default definition is fmap . const, but this may be overridden with a more efficient version.

    Examples

    Perform a computation with Maybe and replace the result with a constant value if it is Just:
    >>> 'a' <$ Just 2
    Just 'a'
    
    >>> 'a' <$ Nothing
    Nothing
    

  4. (<$>) :: Functor f => (a -> b) -> f a -> f b

    cabal-install-solver Distribution.Solver.Compat.Prelude

    An infix synonym for fmap. The name of this operator is an allusion to $. Note the similarities between their types:

    ($)  ::              (a -> b) ->   a ->   b
    (<$>) :: Functor f => (a -> b) -> f a -> f b
    
    Whereas $ is function application, <$> is function application lifted over a Functor.

    Examples

    Convert from a Maybe Int to a Maybe String using show:
    >>> show <$> Nothing
    Nothing
    
    >>> show <$> Just 3
    Just "3"
    
    Convert from an Either Int Int to an Either Int String using show:
    >>> show <$> Left 17
    Left 17
    
    >>> show <$> Right 17
    Right "17"
    
    Double each element of a list:
    >>> (*2) <$> [1,2,3]
    [2,4,6]
    
    Apply even to the second element of a pair:
    >>> even <$> (2,2)
    (2,True)
    

  5. (=$) :: forall (m :: Type -> Type) a b c r . Monad m => Conduit a m b -> ConduitT b c m r -> ConduitT a c m r

    classy-prelude-conduit ClassyPrelude.Conduit

    A synonym for =$= for backwards compatibility. Since 0.4.0

  6. (=$$+) :: forall (m :: Type -> Type) a b r . Monad m => ConduitT a b m () -> ConduitT b Void m r -> ConduitT a Void m (SealedConduitT a b m (), r)

    classy-prelude-conduit ClassyPrelude.Conduit

    The connect-and-resume operator. This does not close the Conduit, but instead returns it to be used again. This allows a Conduit to be used incrementally in a large program, without forcing the entire program to live in the Sink monad. Leftover data returned from the Sink will be discarded. Mnemonic: connect + do more. Since 1.0.17

  7. (=$$++) :: forall (m :: Type -> Type) i o r . Monad m => SealedConduitT i o m () -> ConduitT o Void m r -> ConduitT i Void m (SealedConduitT i o m (), r)

    classy-prelude-conduit ClassyPrelude.Conduit

    Continue processing after usage of =$$+. Connect a SealedConduitT to a sink and return the output of the sink together with a new SealedConduitT. Since 1.0.17

  8. (=$$+-) :: forall (m :: Type -> Type) i o r . Monad m => SealedConduitT i o m () -> ConduitT o Void m r -> ConduitT i Void m r

    classy-prelude-conduit ClassyPrelude.Conduit

    Same as =$$++, but doesn't include the updated SealedConduitT. NOTE In previous versions, this would cause finalizers to run. Since version 1.3.0, there are no finalizers in conduit. Since 1.0.17

  9. (=$=) :: forall (m :: Type -> Type) a b c r . Monad m => Conduit a m b -> ConduitT b c m r -> ConduitT a c m r

    classy-prelude-conduit ClassyPrelude.Conduit

    Deprecated fusion operator. Since 0.4.0

  10. (<$?>) :: Filtrable f => (a -> Maybe b) -> f a -> f b

    filtrable Data.Filtrable

    Infix synonym of mapMaybe

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