concurrent goroutines

gobyexample/waitgroups.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"fmt"
+	"sync"
+	"time"
+)
+
+func worker(id int) {
+	fmt.Printf("Worker %d starting\n", id)
+	time.Sleep(time.Second)
+	fmt.Printf("Worker %d done\n", id)
+}
+
+func main() {
+	var wg sync.WaitGroup
+
+	for i:= 1; i<=5; i++ {
+		wg.Add(1)
+
+		i := i
+
+		go func() {
+			defer wg.Done()
+			worker(i)
+		}()
+	}
+	wg.Wait()
+}