fizzbuzz enumerator

fizzbuzz.rb

fizzbuzz = Enumerator.new do |y|
  num = 0
  loop do
    y << case
		when num % 15 == 0 then "FizzBuzz"
		when num % 3  == 0 then "Fizz"
		when num % 5  == 0 then "Buzz"
		else num
		end
    num += 1
  end
end

pp fizzbuzz.take(20)

=begin
["FizzBuzz",
 1,
 2,
 "Fizz",
 4,
 "Buzz",
 "Fizz",
 7,
 8,
 "Fizz",
 "Buzz",
 11,
 "Fizz",
 13,
 14,
 "FizzBuzz",
 16,
 17,
 "Fizz",
 19]
=end