douqiang7462 2010-11-18 23:30
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如何在Go中动态频道列表中选择输入?

Go has a mechanism to do a blocking read from one of several channels, the select statement. So you can say

select {
    case <- c1:
    case <- c2:
}

will block until we get input from either of these two channels. Very nice.

But this requires that I specify in the source code how many channels I want to poll. What if I have a slice or array of channels and I want to block until I get input on any of them?

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  • dpmrakfbx820320638 2010-11-19 00:18
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    Just a thought, but you could use a multiplexing pattern, where you spawn off a goroutine with 2 channels that blocks on both and sends the output to a new channel. Then you can just build up a tree of these dynamically from your list that funnels everything down to a single channel, which you then read on.

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