Thanks Caleb, this is looks more idiomatic Go.
> On 29-Dec-2016, at 17:14, Caleb Doxsey <ca...@doxsey.net> wrote:
>
> Use time.After:
>
> package main
>
> import (
> "log"
> "math/rand"
> "time"
> )
>
> func randomSleep(min, max int64) <-chan time.Time {
> rand.Seed(time.Now().UnixNano())
> sleepDuration := time.Duration(rand.Int63n(max-min)+min) *
> time.Millisecond
> log.Printf("Sleep duration: %v\n", sleepDuration)
> return time.After(sleepDuration)
> }
>
> func main() {
> select {
> case <-time.After(1000 * time.Millisecond):
> log.Println("time after chan triggered")
> case <-randomSleep(1000, 2000):
> log.Println("rand sleep triggered")
> }
> }
>
> https://play.golang.org/p/nHOPEJ8URz
>
> On Wednesday, December 28, 2016 at 2:46:03 PM UTC-5, Abhishek Singh wrote:
> Hi,
>
> Below is a sample example, where I'm trying to understand behaviour of select
> statement. I was hoping the time.After() case clause to succeed but
> observation is that either of those clauses are executed intermittently.
> Would help if someone could share what's going on.
>
> func randomSleep(min, max int64) time.Duration {
> rand.Seed(time.Now().UnixNano())
> sleepDuration := time.Duration(rand.Int63n(max-min)+min) *
> time.Millisecond
> log.Printf("Sleep duration: %v\n", sleepDuration)
> time.Sleep(sleepDuration)
> return sleepDuration
> }
>
> func main() {
> sendCh := make(chan time.Duration, 1)
> select {
> case <-time.After(1000 * time.Millisecond):
> log.Println("time after chan triggered")
> case sendCh <- randomSleep(1000, 2000):
> log.Println("rand sleep triggered")
> }
> }
>
> Go Playground - https://play.golang.org/p/6SosvxOUGL
> <https://play.golang.org/p/6SosvxOUGL>
>
> ----
>
> I understand, I could workaround this behaviour via:
>
> func main() {
> sendCh := make(chan time.Duration, 1)
> go func () { sendCh <- randomSleep(1000, 2000) }()
> select {
> case <-time.After(1000 * time.Millisecond):
> log.Println("time after chan triggered")
> case <-sendCh:
> log.Println("rand sleep triggered")
> }
> }
>
> Thanks.
>
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