[Haskell-cafe] Re: [newbie] How to test this function?
lemming at henning-thielemann.de
Thu Sep 21 10:20:33 EDT 2006
On Thu, 21 Sep 2006, Bruno Martínez wrote:
> > getList :: IO [Char]
> > getList = take5 `fmap` getContents -- a thin IO "skin"
> > take5 :: [Char] -> [Char]
> > take5 = take 5 . filter (`elem` ['a'..'e']) -- the actual worker
> The problem is that getContents 'eats' stdin, which can't be used again.
You can process the result of getContents as many times as you want.
> I'm forced to change all my IO code to the getContents way, which is not
If your program contains so much IO code you should seriously consider
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