[Haskell-cafe] Re: Mapping over multiple values of a list at once?

haskell@kudling.de wrote:

You are asked to iterate over the list and calculate the average value of each 3 neighbouring values.

Lambda Fu, form 72 - three way dragon zip averages3 xs = zipWith3 avg xs (drop 1 xs) (drop 2 xs) where avg a b c = (a+b+c) / 3 Regards, apfelmus -- http://apfelmus.nfshost.com