go by example part 3

5-go-by-example/28-select.go

@@ -0,0 +1,34 @@
+// select lets you wait on multiple channel operations
+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+func main() {
+	// select across two channels
+
+	c1 := make(chan string)
+	c2 := make(chan string)
+
+	// each channel will receive a value after some amount of time, to simulate
+	go func() {
+		time.Sleep(1 * time.Second)
+		c1 <- "one"
+	}()
+	go func() {
+		time.Sleep(2 * time.Second)
+		c2 <- "two"
+	}()
+
+	// use select to await both of these values simultaneously
+	for i := 0; i < 2; i++ {
+		select {
+		case msg1 := <-c1:
+			fmt.Println("received", msg1)
+		case msg2 := <-c2:
+			fmt.Println("received", msg2)
+		}
+	}
+}