关闭chan的时候需要注意哪些问题？

stevewang 2015-11-16 16:30

B关闭channel，A收到关闭消息后结束当前任务。

xinyu391 2015-11-16 19:22

当然是最后接触chan的 负责关闭了啊

nzai 2015-11-17 10:49

B负责关闭chan，关闭后A依然可以从chan中读出剩余未读数据，并且A可以判读chan是否关闭了

i, ok := <- ch 
if ok { 
    println(i) 
} else { 
    println("channel closed") 
}

JY115 2015-11-19 09:22

Go内置函数close()官方文档介绍

// The close built-in function closes a channel, which must be either
// bidirectional or send-only. It should be executed only by the sender,
// never the receiver, and has the effect of shutting down the channel after
// the last sent value is received. After the last value has been received
// from a closed channel c, any receive from c will succeed without
// blocking, returning the zero value for the channel element. The form
//    x, ok := <-c
// will also set ok to false for a closed channel.
func close(c chan<- Type)