4.11 timeout

package main

import (
    "fmt"
    "time"
)

func main() {

    to := time.After(3 * time.Second)
    list := make([]string, 0)
    done := make(chan bool, 1)

    fmt.Println("Starting to insert items")
    go func() {
        defer fmt.Println("Exiting goroutine")
        for {
            select {
            case <-to:
                fmt.Println("The time is up")
                done <- true
                return
            default:
                list = append(list, time.Now().String())
            }
        }
    }()

    <-done
    fmt.Printf("Managed to insert %d items\n", len(list))

}

/*

Starting to insert items
The time is up
Exiting goroutine
Managed to insert 1866573 items

*/