47 lines
690 B
Go
47 lines
690 B
Go
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package closingchannels
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import (
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"fmt"
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"math"
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"math/rand"
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"time"
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)
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func ClosingChannels() {
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jobs := make(chan int, 5)
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done := make(chan bool)
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go func() {
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for {
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val, more := <-jobs
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if more {
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time.Sleep(time.Duration(rand.Intn(3)) * time.Second)
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fmt.Printf("%d ^ %d is %f\n", val, 2, math.Pow(float64(val), 2))
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} else {
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fmt.Println("No more jobs, goroutine exiting")
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done <- true
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return
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}
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}
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}()
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for i := range 3 {
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jobs <- i + 1
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}
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fmt.Println("Sent all jobs")
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close(jobs)
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<-done
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_, more := <-jobs
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if more {
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fmt.Println("Uh-oh, jobs queue is not empty")
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} else {
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fmt.Println("Jobs queue is empty")
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}
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fmt.Println("Exiting")
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}
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