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

    distribution-opensuse OpenSuse.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
    

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

    distribution-opensuse OpenSuse.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
    

  3. (<$!>) :: Monad m => (a -> b) -> m a -> m b

    distribution-opensuse OpenSuse.Prelude

    Strict version of <$>.

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

    distribution-opensuse OpenSuse.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. (:$) :: Expr -> Expr -> Expr

    extrapolate Test.Extrapolate

    function application between expressions

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

    faktory Faktory.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)
    

  7. (.$) :: forall x (xs :: [Type]) . Show x => Predicate (x ': xs) -> (Var, x) -> Predicate xs

    falsify Test.Falsify.Predicate

    Infix version of at Typical usage example:

    assert $
    P.relatedBy ("equiv", equiv)
    .$ ("x", x)
    .$ ("y", y)
    

  8. (<$$$>) :: (Functor f, Functor g, Functor h) => (a -> b) -> f (g (h a)) -> f (g (h b))

    fuzzyset Data.FuzzySet.Utils

    No documentation available.

  9. (<$$>) :: (Functor f, Functor g) => (a -> b) -> f (g a) -> f (g b)

    fuzzyset Data.FuzzySet.Utils

    No documentation available.

  10. (<$.>) :: Functor f => Walk c b d -> f (GTraversal c a b) -> f (GTraversal c a d)

    greskell Data.Greskell

    Similar to <$>, but for $..

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