How do I synchronize goroutines in Go?

How do I synchronize goroutines in Go?

You can use channels, WaitGroups, or mutexes to synchronize goroutines in Go. Which method are you interested in?

Can you explain how WaitGroups work?

Sure! A WaitGroup waits for a collection of goroutines to finish executing. You add to the WaitGroup before starting a goroutine and call Done when it finishes.

How do I implement a WaitGroup in my code?

Here's a simple example:

var wg sync.WaitGroup

for i := 0; i < 5; i++ {
    wg.Add(1)
    go func(i int) {
        defer wg.Done()
        fmt.Println(i)
    }(i)
}

wg.Wait()

This will wait for all goroutines to finish before proceeding.

What are the differences between channels and mutexes for synchronization?

Channels are used for communication between goroutines, while mutexes are used to protect shared data. Channels can help avoid race conditions by design.