[Haskell-cafe] Code Golf
sebf at informatik.uni-kiel.de
Mon Apr 20 07:48:37 EDT 2009
On Apr 18, 2009, at 2:48 AM, Sjoerd Visscher wrote:
> using Matt Hellige's pointless fun
> diag = foldr1 (zipWith (++) $. id ~> (:) ~> id)
> $. map (++ repeat ) ~> takeWhile (not.null)
> $. (map.map) (:) ~> concat
pretty! Those seem to be exactly the combinators that I was looking for.
Unfortunately, I still don't manage to mimic my version that uses
functional lists and continuations (but no ++) mainly because I'm
lacking an equivalent of the second line of the above solution which
allows for the simpler 'zipWith (++)' instead of the merge function.
Anyway, once you know what they mean, Matt's combinators are quite
useful. Thanks for pointing that out!
More information about the Haskell-Cafe