Created
September 15, 2024 20:48
-
-
Save tivrfoa/948a9660657278915328cdd3f3465efa to your computer and use it in GitHub Desktop.
Go goroutine wg sync.WaitGroup
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| // https://www.youtube.com/watch?v=VmBwn6Nac74 | |
| package main | |
| import ( | |
| "fmt" | |
| "sync" | |
| // "time" | |
| ) | |
| func sumNumbers(numbers [5]int) int { | |
| sizes := make(chan int) | |
| var wg sync.WaitGroup | |
| for _, n := range numbers { | |
| wg.Add(1) | |
| go func(n int) { | |
| fmt.Println("n = ", n) | |
| defer wg.Done() | |
| sizes <- n * 10 | |
| }(n) | |
| } | |
| go func() { | |
| wg.Wait() | |
| close(sizes) | |
| }() | |
| var sum int | |
| for v := range sizes { | |
| prevSum := sum | |
| sum += v | |
| fmt.Println(prevSum, "+", v, "=", sum) | |
| } | |
| return sum | |
| } | |
| func main() { | |
| // go func() { | |
| // fmt.Println("goroutine 1") | |
| // }() | |
| // time.Sleep(1 * time.Second) | |
| numbers := [5]int{10, 20, 30, 40, 50} | |
| fmt.Println(numbers) | |
| fmt.Println("Sum is", sumNumbers(numbers)) | |
| fmt.Println("END") | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment