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
_______________________________________________
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
http://www.haskell.org/mailman/listinfo/haskell-cafe
