Cool stuff! On Wed, Jul 27, 2022 at 3:46 PM Brian Candler <b.cand...@pobox.com> wrote:
> I see. There's a concrete benefit in using the waitgroup though: it would > have shown you the second write blocking. > https://go.dev/play/p/WNHRkkUUZUt > > On Wednesday, 27 July 2022 at 10:43:01 UTC+1 aravind...@gmail.com wrote: > >> Thanks Brian, Got it. >> "A send cannot take place until the reader is ready to receive." . So an >> unbuffered channel does not have the same behaviour as a buffered channel >> of size 1, fair. >> >> I understand part about the waitGroup, I copy pasted code used to tutor >> the newcomers to programming itself. >> >> On Wed, Jul 27, 2022 at 1:05 PM Brian Candler <b.ca...@pobox.com> wrote: >> >>> BTW, using time.Sleep() to keep goroutines running is poor practice. >>> >>> What I suggest is using a sync.WaitGroup. Call wg.Add(1) for each >>> goroutine you start; call wg.Done() when each goroutine ends; and call >>> wg.Wait() to wait for them. >>> https://go.dev/play/p/INl7BxG0ZSU >>> >>> On Wednesday, 27 July 2022 at 08:30:53 UTC+1 Brian Candler wrote: >>> >>>> Unless a channel is buffered, it is synchronous. A send cannot take >>>> place until the reader is ready to receive. >>>> >>>> You can make it buffered using >>>> numCh = make(chan int, 1) >>>> go write() >>>> go read() >>>> >>>> Or you can have two calls to read(): >>>> >>>> numCh = make(chan int) >>>> go write() >>>> go read() >>>> go read() >>>> >>>> On Wednesday, 27 July 2022 at 08:13:34 UTC+1 aravind...@gmail.com >>>> wrote: >>>> >>>>> Hi All, >>>>> When I was explaining basics of channels to newcomers, I was using the >>>>> below example >>>>> https://go.dev/play/p/xx2qqU2qqyp >>>>> >>>>> I was expecting both Write 5 and Write 3 to be printed. But only Write >>>>> 5 was printed. I couldn't reason out the behaviour, can somebody point out >>>>> what I am assuming wrong about. >>>>> >>>>> Thanks, >>>>> Aravindhan K >>>>> >>>> -- >>> You received this message because you are subscribed to the Google >>> Groups "golang-nuts" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to golang-nuts...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/golang-nuts/2e036151-0069-44d9-9de2-3dcf98b33dban%40googlegroups.com >>> <https://groups.google.com/d/msgid/golang-nuts/2e036151-0069-44d9-9de2-3dcf98b33dban%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/3d40de77-6432-418f-a082-df73994a739en%40googlegroups.com > <https://groups.google.com/d/msgid/golang-nuts/3d40de77-6432-418f-a082-df73994a739en%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CAJn1S2PyMEfQTbSqSvCV3oOBW%2ByTb9X8Wy3u2vOkiLRSg4197w%40mail.gmail.com.
