Re: [Haskell-cafe] function unique

Hi

unique = unique' []

unique' _ [] = [] unique' history (x:xs) = if x `elem` history then next else (x:next) where next = (uniq' (x:hist) xs)

You can express this more neatly: unique' _ [] = [] unique' history (x:xs) = [x | x `notElem` history] ++ unique' (x:history) xs Thanks Neil