2010/3/20 boblettoj <bobletto...@msn.com>: > > Ah yes, that makes sense now, however i have another problem, here is the > updated code: > > --function used to shuffle cards > --list equals random member of array plus the rest of the array > --i is randomly generated from range of length equal to that of cards. > shuffle :: Int -> [a] -> [a] > shuffle i [] = [] > shuffle i cards = [(cards!!i) : > (shuffle (randomR(0, ((length cards)-2))) > (delete (cards!!i) cards))] > > and the message: > cards.hs:32:11: > Couldn't match expected type `Int' > against inferred type `g -> (Int, g)' > In the first argument of `shuffle', namely > `(randomR (0, ((length cards) - 2)))' > In the second argument of `(:)', namely > `(shuffle > (randomR (0, ((length cards) - 2))) (delete (cards !! i) > cards))' > In the expression: > (cards !! i) > : (shuffle > (randomR (0, ((length cards) - 2))) (delete (cards !! i) > cards)) > > Doesn't RandomR return an Int?
No, see docs http://haskell.org/hoogle/?hoogle=randomR > thanks > -- > View this message in context: > http://old.nabble.com/Occurs-check-error%2C-help%21-tp27966341p27967762.html > Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
