Hoogle Search

Within LTS Haskell 24.4 (ghc-9.10.2)

Note that Stackage only displays results for the latest LTS and Nightly snapshot. Learn more.

  1. (<$$>) :: Applicative m => m Doc -> m Doc -> m Doc

    graphviz Data.GraphViz.Printing

    The document (x <$$> y) concatenates document x and y with a linebreak in between. (infixr 5)

  2. (<*>.-$) :: C x => T v (x -> a) -> (v -> x) -> T v a

    numeric-prelude Algebra.Additive

    No documentation available.

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

    numeric-prelude NumericPrelude

    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 -> f b -> f a

    numeric-prelude NumericPrelude.Base

    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
    

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

    numhask NumHask.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
    

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

    numhask NumHask.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. type family (f :: a ~> b) <$> (ma :: m a) :: m b

    type-spec Test.TypeSpec.Internal.Apply

    No documentation available.

  8. data (c :: a ~> b) <$>$ (d :: TyFun m a m b)

    type-spec Test.TypeSpec.Internal.Apply

    No documentation available.

  9. (<$>>) :: HasTrie (Basis a) => (b -> c) -> (a :> b) -> a :> c

    vector-space Data.Maclaurin

    Map a linear function over a derivative tower.

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

    basic-prelude BasicPrelude

    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
    

Page 58 of many | Previous | Next