Re: [Haskell-beginners] Finding the first successful Map.lookup

2 Dec 2010

      Hi Johan & Daniel,

thanks for you answers. I had forgotten the MonadPlus/msum and
the trick to use undefined.

... althought the trick with undefined here takes me quiet some
time to grasp it ... but now I know my function works lazily.

regards,
/John

John Obbele