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.cand...@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+unsubscr...@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/CAJn1S2O6M8ag_4Bj2BCE301Dw25k278E18mH8U8kOwiX_cg6cQ%40mail.gmail.com.
