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Within LTS Haskell 24.10 (ghc-9.10.2)
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<$> ) :: (Functor f r (->), Object r a, Object r b) => r a b -> f a -> f bconstrained-categories Control.Functor.Constrained No documentation available.
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=$ ) :: Projectable d s t => Projection d s t -> (Stream t -> Stream t) -> Stream dcopilot-language Copilot.Language.Operators.Array Update the value of a sub-element of a type in a stream of elements of that type, by applying a function on streams.
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=$ ) :: Projectable d s t => Projection d s t -> (Stream t -> Stream t) -> Stream dcopilot-language Copilot.Language.Operators.Projection Update the value of a sub-element of a type in a stream of elements of that type, by applying a function on streams.
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=$ ) :: Projectable d s t => Projection d s t -> (Stream t -> Stream t) -> Stream dcopilot-language Copilot.Language.Operators.Struct Update the value of a sub-element of a type in a stream of elements of that type, by applying a function on streams.
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<$ ) :: Functor f => a -> f b -> f acopilot-language Copilot.Language.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
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<$> ) :: Functor f => (a -> b) -> f a -> f bcopilot-language Copilot.Language.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 <$> (2,2) (2,True)
newtype (f :: Type -> Type)
:$: xdiff-loc DiffLoc.Starter A trick to reduce noise by hiding newtype wrapper constructors. This makes the documentation more palatable.
>>> show (NoShow (Plain 3) :: Plain :$: Int) "3" >>> show (Colline 4 2 :.. Vallee (offset 3) (offset 3) :: Interval (Colline N N)) "Colline 4 2 :.. Vallee (offset 3) (offset 3)"
(
<$ ) :: Functor f => a -> f b -> f afrisby Text.Parsers.Frisby 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
(
<$> ) :: Functor f => (a -> b) -> f a -> f bfrisby Text.Parsers.Frisby 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 <$> (2,2) (2,True)
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<$> ) :: Functor f => (a -> b) -> f a -> f bghc-lib GHC.HsToCore.Monad 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)