GO by example, part 4

5-go-by-example/34-tickers.go

@@ -0,0 +1,31 @@
+// tickers are for when you want to do something repeatedly at regular intervals
+
+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+func main() {
+	// Tickers use a similar mechanism to timers: a channel that is sent values
+	ticker := time.NewTicker(500 * time.Millisecond)
+	done := make(chan bool)
+
+	go func() {
+		for {
+			select {
+			case <-done:
+				return
+			case t := <-ticker.C:
+				fmt.Println("Tick at", t)
+			}
+		}
+	}()
+
+	// Tickers can be stopped like timers
+	time.Sleep(1600 * time.Millisecond)
+	ticker.Stop()
+	done <- true
+	fmt.Println("Ticker stopped")
+}