Go by Example: Closing Channels https://gobyexample.com/closing-channels #golang

actual_output.txt

❯ go run closing-channels.go
sent job 1
sent job 2
sent job 3
sent all jobs
received job 1
received job 2
received job 3
received all jobs

closing-channels.go

package main

import (
  "fmt" 
)

func main() {
  jobs := make(chan int, 5)
  done := make(chan bool)

  go func() {
    for {
        j, more := <-jobs
        if more {
          fmt.Println("received job", j)
        } else {
          fmt.Println("received all jobs")
          done <- true
          return
        }
     }
  }()

  for i := 1; i <= 3; i++ {
    jobs <- i
    fmt.Println("sent job", i)
  }
  close(jobs)
  fmt.Println("sent all jobs")

  <-done
}

expected_output.txt

$ go run closing-channels.go 
sent job 1
received job 1
sent job 2
received job 2
sent job 3
received job 3
sent all jobs
received all jobs