concurrency.go

package main

func work(id int, done chan int) {
	println("processing top secret document:", id)
	done <- id
}

func main() {
	done := make(chan int, 5)
	for i := 0; i < 5; i++ {
		go work(i, done)
	}
	for i := 0; i < 5; i++ {
		id := <-done
		println("finished processing document:", id)
	}
	println("finished processing all documents")
}