& package:composition-prelude

& is a reverse application operator. This provides notational convenience. Its precedence is one higher than that of the forward application operator $, which allows & to be nested in $.

>>> 5 & (+1) & show
"6"

(&:) :: (b -> b -> c) -> (a -> b) -> a -> a -> c

composition-prelude Control.Composition

Pronounced 'appose'. Synonym for on

(<&>) :: Functor f => f a -> (a -> b) -> f b

composition-prelude Control.Composition

Flipped version of <$>.

(<&>) = flip fmap

Examples

Apply (+1) to a list, a Just and a Right:

>>> Just 2 <&> (+1)
Just 3

>>> [1,2,3] <&> (+1)
[2,3,4]

>>> Right 3 <&> (+1)
Right 4