Re: [Haskell-cafe] Conditional IO ?

| otherwise = return () or: handleParseErrors errors = when (not . null $ errors) $ writeFile ..... 2011/6/20 Dmitri O.Kondratiev :

Hi, What is right way to do conditional IO? For example, I need to write to file errors only in case they exist, otherwise my function should do nothing:

handleParseErrors errors   | (not . null) errors =  writeFile "parse-errors.txt" (show errors)   | otherwise = ?

What should be an 'otherwise' case ?

Thanks!

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