List comprehension in Haskell, Python and Ruby

Question

I have started looking at the project Euler site as a way to learn Haskell, and improve my Python and Ruby. I think the Haskell and Python versions are ok, but I\'m sure the

Answer 1

I think the following is a better Ruby one:

(1..999).select{|x| x % 3 == 0 || x % 5 == 0}.reduce(:+)