initial commit

select/select.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"fmt"
+	"time"
+)
+//Go's select lets you wait on multiple channel
+//operations combining goroutines and channels with select
+//is a powerful feature of go
+func main(){
+	//For our example well 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 e.g. blocking RPC
+	//operations executing in concurrent goroutines
+	go func(){
+		time.Sleep(1*time.Second)
+		c1 <- "one"
+	}()
+	go func(){
+		time.Sleep(2*time.Second)
+		c2 <- "two"
+	}()
+
+
+	//we'll use select to await both of these values
+	//simultaneously, printing each one as it arrives.
+	for i := 0; i < 2; i++ {
+		select{
+			case msg1 := <-c1:
+				fmt.Println("received", msg1)
+			case msg2 := <-c2:
+				fmt.Println("received", msg2)
+		}
+	}
+}