Bagaimana Cara Menamatkan Goroutine Dengan Betul Apabila Menggunakan Saluran Ticker di Golang?

package main

import (
    "fmt"
    "time"
)

func main() {
    ticker := time.NewTicker(1 * time.Second)
    go func() {
        for _ = range ticker.C {
            fmt.Println("tick")
        }
    }()
    time.Sleep(3 * time.Second)
    fmt.Println("stopping ticker")
    ticker.Stop()
    time.Sleep(3 * time.Second)
}

2013/07/22 14:26:53 tick
2013/07/22 14:26:54 tick
2013/07/22 14:26:55 tick
2013/07/22 14:26:55 stopping ticker

package main

import (
    "fmt"
    "log"
    "time"
)

// Run the function every tick
// Return false from the func to stop the ticker
func Every(duration time.Duration, work func(time.Time) bool) chan bool {
    ticker := time.NewTicker(duration)
    stop := make(chan bool, 1)

    go func() {
        defer log.Println("ticker stopped")
        for {
            select {
            case time := <-ticker.C:
                if !work(time) {
                    stop <- true
                }
            case <-stop:
                return
            }
        }
    }()

    return stop
}

func main() {
    stop := Every(1*time.Second, func(time.Time) bool {
        fmt.Println("tick")
        return true
    })

    time.Sleep(3 * time.Second)
    fmt.Println("stopping ticker")
    stop <- true
    time.Sleep(3 * time.Second)
}