9 Aug
2013
9 Aug
'13
6:38 a.m.
With Data.Foldable, it's quite nice:
check x assoc = lookup x assoc `for_` \f -> putStrLn ("found " ++ f)
On Fri, Aug 2, 2013 at 1:45 AM, Michael Orlitzky
On 08/01/2013 11:00 AM, vold 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?
maybe (return ()) (putStrLn . ("found " ++)) found
is the best I could do.
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