[Haskell-cafe] Re: how can this code be less?

25 Apr 2008


      Christian Maeder wrote:
...
...
isEqual :: Eq a => [a] -> [a] -> Bool
isEqual [] _     = True
isEqual (_:_) [] = False
isEqual (x:xs) (y:ys)
  | x==y     = isEqual xs ys
  | otherwise    = False
isEqual is not needed, because "Eq" provides "==" over lists, too.
Ah, isEqual isn't "==", but isPrefixOf.

C.