golang学习笔记——select
select就是用来监听和channel有关的IO操作，当 IO 操作发生时，触发相应的动作
package main import ( "fmt" "time" ) func main() { ch := make(chan int) o := make(chan bool) go func() { for { select { case <-time.After(3 * time.Second): fmt.Println("超时") o <- true case num := <-ch: fmt.Println(num) } } }() <-o }