Kuidas saab määrata, et kõik lapsegorutined on Go programmis lõpetanud töö?

In Go, synchronization using the sync.WaitGroup type is commonly used to determine the completion of all child goroutines.

Example:

var wg sync.WaitGroup

wg.Add(3) // expecting 3 goroutines

for i := 0; i < 3; i++ {
    go func(id int) {
        defer wg.Done() // signal completion
        // goroutine work
        fmt.Println("Goroutine", id, "completed")
    }(i)
}

wg.Wait() // blocks until all goroutines have called Done
fmt.Println("All goroutines have completed")

This way, WaitGroup allows the main goroutine to wait for the completion of all child goroutines.