package example

func worker(id int, results chan<- int) {
	results <- id * id
}

func fanOut() {
	results := make(chan int)
	for i := 0; i < 4; i++ {
		go worker(i, results)
	}
	for i := 0; i < 4; i++ {
		<-results
	}
}

func background(fn func()) {
	go fn()
}

func pipeline() {
	ch := make(chan string)
	go func() {
		ch <- "hello"
	}()
	msg := <-ch
	_ = msg
}