package main

import "time"

func main() {
	jobs := make(chan int, 100)
	acks := make(chan bool, 100)

	for w := 0; w < 10; w++ {
		go func() {
			for j := range jobs {
				println("worker", w, "processing job", j)
				time.Sleep(time.Millisecond * 150)
				acks <- true
			}
		}()
	}

	for j := 0; j < 100; j++ {
		jobs <- j
	}

	for a := 0; a < 100; a++ {
		<- acks
	}
	println("all done")
}