Re: [Haskell-cafe] Sequence of lifting transformation operators

Tyson Whitehead wrote:

<$$> :: (a -> b -> c) -> f a -> f b -> f c

I'd just like to point out that this operator is often used by as the oeprator for fmap2: (<$$>) :: (Functor f1, Functor f) => (a -> b) -> f (f1 a) -> f (f1 b) (<$$>) = fmap . fmap Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/