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

Try this for Ruby:

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

Or a little different approach:

(1..999).reduce(0) {|m, x| (x % 3 == 0 or x % 5 == 0) ? m+x : m }