Go - Select Channel

• Declare

select {

    case <- ch:

        ...

    case x := <- ch2:

        ...

    case ch3 <- y:

        ...

    default:

        ...

}

• Select wait until some case is ready to proceed
• Select with no case, wait forever

select {}

Here is example, please notice if more than 1 channel can be process, Go will pick one to process randomly