Re: [Haskell-cafe] do you have to use fix with forkio?

Derek Elkins wrote:

Both are poorish style.

reader <- forkIO $ forever $ do (nr', line) <- readChan; when (nr /= nr') $ putStrLn hdl line

This is fine assuming you always want to re-enter the loop. If you want to loop conditionally (which is most often the case), forever isn't going to work, unless you use exceptions. Martijn.