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1. (:$) :: Expr -> Expr -> Expr

   express	Data.Express

   function application between expressions

2. (>$$) :: [Expr] -> Expr -> [Expr]

   express	Data.Express

   Lists valid applications between a list of Exprs and an Expr.

   > [plus, times] >$$ zero
   [(0 +) :: Int -> Int,(0 *) :: Int -> Int]
   

3. (>$$<) :: [Expr] -> [Expr] -> [Expr]

   express	Data.Express

   Lists valid applications between lists of Exprs

   > [notE, plus] >$$< [false, true, zero]
   [not False :: Bool,not True :: Bool,(0 +) :: Int -> Int]
   

4. (>$$) :: [Expr] -> Expr -> [Expr]

   express	Data.Express.Basic

   Lists valid applications between a list of Exprs and an Expr.

   > [plus, times] >$$ zero
   [(0 +) :: Int -> Int,(0 *) :: Int -> Int]
   

5. (>$$<) :: [Expr] -> [Expr] -> [Expr]

   express	Data.Express.Basic

   Lists valid applications between lists of Exprs

   > [notE, plus] >$$< [false, true, zero]
   [not False :: Bool,not True :: Bool,(0 +) :: Int -> Int]
   

6. (:$) :: Expr -> Expr -> Expr

   express	Data.Express.Core

   function application between expressions

7. (-$-) :: Expr -> Expr -> Expr

   express	Data.Express.Fixtures

   $ lifted over Exprs

   > absE -$- one
   abs $ 1 :: Int
   

   Works for Int, Bool, Char argument types and their lists.

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

   foundation	Foundation

   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
   

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

   foundation	Foundation

   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)
   

10. (<#$>) :: Keyed f => (Key f -> a -> b) -> f a -> f b

    keys	Data.Key

    No documentation available.

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