并发编程

var wg conc.WaitGroup
 defer wg.Wait()
 startTheThing(&wg)
func startTheThing(wg *conc.WaitGroup) {
 wg.Go(func() {
     fmt.Println(1)
 })
}

var wg sync.WaitGroup
 for i := 0; i < 10; i++ {
     wg.Add(1)
     go func() {
         defer wg.Done()
         doSomething()
     }()
 }
 wg.Wait()

var wg conc.WaitGroup
 for i := 0; i < 10; i++ {
     wg.Go(doSomething)
 }
 wg.Wait()