Data.Functor has <$> and <$, but not $>, which should be a flipped version of <$, analogous to <*>, <*, and *> in Control.Applicative. I was astonished to see that Data.Functor doesn't have it so I had to write it myself. Then I looked on hackage and found it defined in comonad package (also re-exported from semigroupoids). One (seemingly unmaintained, last version Apr 2012) package named iterIO has it, too. infixl 4 $> -- | Replace the contents of a functor uniformly with a constant value. ($>) :: Functor f => f b -> a -> f a ($>) = flip (<$) I propose to add this to Data.Functor; mostly because I think users expect it there (again by analogy with Applicative), even though it is trivial to write (but then writing <$ is trivial, too). Cheers Ben -- "Make it so they have to reboot after every typo." -- Scott Adams