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- 1. sync.WaitGroup
- func main() {
- var wg sync.WaitGroup
- wg.Add(1)
- go dosomething(200, &wg)
- wg.Add(1)
- go dosomething(400, &wg)
- wg.Add(1)
- go dosomething(150, &wg)
- wg.Add(1)
- go dosomething(600, &wg)
- wg.Wait()
- fmt.Println("Done")
- }
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