The lens package defines (&) and (<&>) as flipped ($) and (<$>), respectively. There is nothing in the base package that defines those. <&> is quite uncommon. Flipped ($) is something that crops up here and there. Sometimes called (|>), or (#).

-- Dan Burton

On Thu, Dec 11, 2014 at 6:47 PM, Clinton Mead <clintonmead@gmail.com> wrote:
Below are the `$` like operators in Haskell (view in fixed width):

          ---------------------------------------------------------------------
          | Function first           | Op   | Function second          | Op   |
-------------------------------------------------------------------------------
| Plain   | (a -> b)   -> a   -> b   | $    | a   -> (a -> b)   -> b   |      |
| Functor | (a -> b)   -> f a -> f b | <$>  | f a -> (a -> b)   -> f b |      |
| Applicat| f (a -> b) -> f a -> f b | <*>  | f a -> f (a -> b) -> f b | <**> |
| Monad   | (a -> m b) -> m a -> m b | =<<  | m a -> (a -> m b) -> m b | >>=  |
-------------------------------------------------------------------------------

The "function second" forms I couldn't find for "plain" and "functor". 
What are the most common operators to used in these places?

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