mv _demo/chandemo

_cmptest/_chandemo/chan.go

@@ -0,0 +1,21 @@
+package main
+
+func main() {
+	c1 := make(chan string)
+	c2 := make(chan string, 1)
+	go func() {
+		c1 <- "ch1"
+	}()
+	go func() {
+		c2 <- "ch2"
+	}()
+
+	for i := 0; i < 2; i++ {
+		select {
+		case msg1 := <-c1:
+			println(msg1)
+		case msg2 := <-c2:
+			println(msg2)
+		}
+	}
+}

_cmptest/_timeout/timer.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+var c chan int
+
+func handle(int) {}
+
+func main() {
+	select {
+	case m := <-c:
+		handle(m)
+	case <-time.After(10 * time.Second):
+		fmt.Println("timed out")
+	}
+}