Thanks for the replies. This was my solution:
module RandomTest ( random_test ) where
import Random
random_test :: Int - IO String
random_test n = do
g - newStdGen
return $ take n (randomRs printable_ascii g)
where printable_ascii = ('!','~')
The struggling with the type system was
Great reply!
One minor point: If real_programme is to be pure, you should use let:
On Jun 14, 2008, at 12:30, Jon Fairbairn wrote:
main :: IO()
do gen - getStdGen
the_list - real_programme gen
let the_list = real_programme gen
print the_list
You should be able to deduce
Robert Vollmert [EMAIL PROTECTED] writes:
Great reply!
Thanks.
One minor point: If real_programme is to be pure, you should use let:
Whoops! I was thinking let but wrote the wrong thing. If
my email had been through a type-checker, it would have
spotted the mistake.
--
Jón Fairbairn
Stephen Howard [EMAIL PROTECTED] writes:
I am a newcomer doing my obligatory struggling with
Haskell's type system,
That's your mistake. Don't struggle with the type system,
the type system is your friend; when it tells you you are
doing something wrong, it's usually right.
and I've got a
