Channel use of Golang

This is a creation in Article, where the information may have evolved or changed.

Channel

Sample1 Close twice

CH: = Make (chan bool) close (CH)  //This will panic, channel cannot close two times

The channel was closed early when it was read.

CH: = Make (Chan string) close (ch) I: = <-CH//will not panic, I read to the value is empty "",  if the channel is bool, then read to False

Write data to a channel that has been closed HTTP://PLAY.GOLANG.ORG/P/VL5D5TKFL7

CH: = Make (Chan string) Close (CH) ch <-"good"//Panic

Determine if the channel is close

I, OK: = <-chif OK {    println (i)} else {    println ("Channel Closed")}

For Loop Read Channel

For i: = range ch {//ch is closed, the For loop automatically ends    println (i)}

Prevent read Timeouts

Select {Case    <-time. After (time. second*2):        println ("read Channel timeout") Case    I: = <-ch:        println (i)}

Prevent write Timeouts HTTP://PLAY.GOLANG.ORG/P/AODFPNWDMJ

In fact, the read timeout is much like the select {case    <-time. After (time. Second):        println ("Write channel timeout") Case    ch <-"Hello":        println ("Write OK")}