fibfib(fibonacci and fiber)

fibfib.rb

# http://magazine.rubyist.net/?0034-FiberForBeginners

#
# fibonacci by Fiber
#

fib = Fiber.new do
  a, b = 0, 1
  loop do
    a, b = b, a + b
    Fiber.yield(a)
  end
end

# fibonacci main
10.times do
  puts fib.resume
end