On 10 Jun 2009, at 12:55 pm, ptrash wrote:
Now I have tried to write a Method which gives me a Number of random numbers the same way but it doesn't work.
randomList :: Int -> [Integer] randomList 0 = [] randomList n = do r <- randomRIO (1, 10) r:randomList(n-1)
It says Couldn't match expected type `IO t' against inferred type `[t]' r <- randomRIO (1,10) causes an error. But why does it work on the console? Is there a way to solve it another way?
I had the same problem a while back, the thread is here http://www.mail-archive.com/haskell-cafe@haskell.org/msg46194.html the console uses IO already, so it's not a problem there. I ended up learning about the >>= operator, and that helped a lot. Anyway, lots of helpful links in that mail thread. Iain