ruby implementation of golang's sieve routine example

sieve.go

// http://golang.jp/go_tutorial#index12

package main

import "fmt"

func generate(ch chan int) {
	for i := 2; ; i++ {
		ch <- i
	}
}

func filter(in, out chan int, prime int) {
	for {
		i := <-in
		if i%prime != 0 {
			out <- i
		}
	}
}

func main() {
	ch := make(chan int)
	go generate(ch)

	for i := 0; i < 100; i++ {
		prime := <-ch
		fmt.Println(prime)

		ch1 := make(chan int)
		go filter(ch, ch1, prime)
		ch = ch1
	}
}

sieve.rb

#
# Ruby implementation of sieve.go (http://golang.jp/go_tutorial#index12)
#

def generate
  Fiber.new do
    n = 2
    loop do
      Fiber.yield(n)
      n += 1
    end
  end
end

def filter(fib, prime)
  Fiber.new do
    loop do
      cand = fib.resume

      if cand.modulo(prime).nonzero?
        Fiber.yield(cand)
      end
    end
  end
end

# Main
fib = generate
100.times do
  prime = fib.resume
  puts prime

  fib = filter(fib, prime)
end