[Haskell-cafe] Re: Occurs check error, help!
dave at zednenem.com
Sun Mar 21 23:44:29 EDT 2010
On Sun, Mar 21, 2010 at 11:31 PM, adamtheturtle <kill2thrill at hotmail.com> wrote:
> So I have the code
> shuffle :: Int -> [a] -> [a]
> shuffle i  = 
> shuffle i cards = (cards!!i) : shuffle (fst pair) (delete (cards!!i) cards)
> where pair = randomR (0, 51) (mkStdGen 42)
> and it doesn't work, am I missing something?
Are you familiar with class constraints? Try looking at the type of
delete. (Use ":type" at the ghci prompt.)
Dave Menendez <dave at zednenem.com>
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