chan-chan.go

// When chan chan usefull in Go

package main

import "fmt"
import "time"

func main() {
  request := make(chan chan string)

  go first(request)
  go second(request)

  time.Sleep(time.Second)
}

func first(request chan chan string) {
  response := make(chan string)
  request <- response

  result := <- response

  fmt.Println(result)
}

func second(request chan chan string) {
  response := <- request
  response <- "input string"
}