[Haskell-cafe] Re: Deepest functor [was: fmap for lists of lists of
lists of ...]
greg at sleepingsquirrel.org
Wed Mar 15 12:35:29 EST 2006
oleg at pobox.com wrote:
> The code below is more general that required. It also generic: it
> works for any Functor and any combination of Functors. It performs
> fmap over arbitrarily deep `collections': lists of maybes of maps of
> IOs, etc. -- arbitrarily nested fmappable things.
Excellent. I guess I'll be brushing up on my typeclass-fu in order
to figure out how all this works.
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