[Haskell-cafe] Cont, ContT and IO()

[Matthias Görgens]

> process [] = return ()
> process (file:files) = do x <- doit file
>                          if x>0 then process files
>                                 else return ()

Or use a fold:

> process' = foldl op True files
> op True file = doit file
> op False _ = False