Re: Add flipped fmap

On Wed, Apr 7, 2010 at 3:58 PM, Felipe Lessa wrote:

Simmetry, as the ticket says.

Indeed, I would like to emphasize that my main reason for adding a flipped fmap is symmetry. I find it hard to explain why <$$> shouldn't be in this list: (<$>) ∷ Functor f ⇒ (α → β) → (f α → f β) (<$$>) ∷ Functor f ⇒ f α → (α → β) → f β (<*>) ∷ Applicative f ⇒ f (α → β) → (f α → f β) (<**>) ∷ Applicative f ⇒ f α → f (α → β) → f β (>>=) ∷ Monad f ⇒ f α → (α → f β) → f β (=<<) ∷ Monad f ⇒ (α → f β) → (f α → f β) Thanks for the excellent discussion so far, Bas