Awesome, thanks! Sometime around Fri, Jun 20, 2003 at 09:47:54PM -0400, mike castleman said: > On Fri, Jun 20, 2003 at 06:23:42PM -0700, Brett Kelly wrote: > > now, i know i've got a syntax problem, because i'm pretty sure my logic is > > correct (or at least MOSTLY correct). > > Try: > > pyindex :: Eq a => a -> [a] -> Maybe Int > pyindex c l = pyindex' 0 l > where pyindex' _ [] = Nothing > pyindex' n (x:xs) = if (x == c) > then Just n > else pyindex' (n+1) xs > > > then, in ghci: > Pyindex> pyindex 'e' "brett" > Just 2 > Pyindex> pyindex 'm' "brett" > Nothing > Pyindex> pyindex 't' "brett" > Just 3 > > hope this helps. > mike > > -- > mike castleman / m at mlcastle dot net / http://mlcastle.net / (646) 382-7220 > aolim: mlcastle / icq: 3520821 / yahoo: mlc000 > please avoid sending me microsoft word, excel, or powerpoint documents. > see http://www.gnu.org/philosophy/no-word-attachments.html for more info. > _______________________________________________ > Haskell-Cafe mailing list > [EMAIL PROTECTED] > http://www.haskell.org/mailman/listinfo/haskell-cafe
-- Brett Kelly [EMAIL PROTECTED] This message has been digitally autographed using GnuPG. Open Source software will continue to change the world... http://www.opensource.org
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