[Haskell-beginners] maybe in IO

[Krzysztof Skrzętnicki]

I'd rather use pattern matching in this case:

check x assoc = case lookup x of
                    Just found -> putStrLn ("found " ++ found)
                    _ ->

Not really shorter but I think it's cleaner this way.




On Thu, Aug 1, 2013 at 5:00 PM, vold <voldermort at hotmail.com> wrote:

> I've defined a function similar to
>
> check x assoc = let found = lookup x assoc in
>                     when (isJust found) $ putStrLn $ "found " ++ fromJust
> found
>
> which I've used several times from within the IO monad. Is there a more
> compact way of doing this?
>
>
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