Simple example of using a shared results channel to retrieve data.

shared-results.go

package main

import "log"
import "time"

type (
	DoneChannel    chan int
	ResultsChannel chan int
)

func GetStuffASync(id int, results ResultsChannel) DoneChannel {
	done := make(DoneChannel)

	go func() {
		for i := 0; i < 10; i++ {
			time.Sleep(time.Millisecond * 500)
			results <- id
		}
		done <- id
		return
	}()

	return done
}

func main() {
	var (
		done    = []DoneChannel{}
		results = make(ResultsChannel)
	)

	done = append(done, GetStuffASync(0, results))
	done = append(done, GetStuffASync(1, results))
	done = append(done, GetStuffASync(2, results))

	go func() {
		for _, d := range done {
			log.Println("done", <-d)
		}
		close(results)
	}()

	for result := range results {
		log.Println("result", result)
	}
	return
}