seems I know what is wrong: my timer is not an *active* one. 在 2016年12月13日星期二 UTC+8下午3:09:30，sleepy写道： > > from the documentation of *func (*Timer) Reset > <https://golang.org/pkg/time/#Timer.Reset>* > >> >> To reuse an active timer, always call its Stop method first and—if it had >> expired—drain the value from its channel. For example: >> if !t.Stop() { >> <-t.C >> } >> t.Reset(d) >> > > but my code blocks at the line "<-t.C" > > code at: https://play.golang.org/p/8XjpvMFt_2 > > could anyone help me out? thanks. >
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