Go Standard Library Cookbook

How to do it...

1. Open the console and create the folder chapter04/recipe10.
2. Navigate to the directory.
3. Create the delay.go file with the following content:

        package main        import (          "fmt"          "sync"          "time"        )        func main() {          t := time.NewTimer(3 * time.Second)           fmt.Printf("Start waiting at %v\n",                      time.Now().Format(time.UnixDate))          <-t.C          fmt.Printf("Code executed at %v\n",                      time.Now().Format(time.UnixDate))          wg := &sync.WaitGroup{}          wg.Add(1)          fmt.Printf("Start waiting for AfterFunc at %v\n",                      time.Now().Format(time.UnixDate))          time.AfterFunc(3*time.Second, func() {          fmt.Printf("Code executed for AfterFunc at %v\n",                      time.Now().Format(time.UnixDate))          wg.Done()        })        wg.Wait()        fmt.Printf("Waiting on time.After at %v\n",  time.Now().Format(time.UnixDate)) ...