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Added example of reading from closed channel #498

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merged 2 commits into from
Nov 30, 2023
Merged

Added example of reading from closed channel #498

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7a8c916
Add example of reading from closed channel
zhuboris Nov 28, 2023
7943306
Add second return value to read example
zhuboris Nov 30, 2023
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8 changes: 8 additions & 0 deletions examples/closing-channels/closing-channels.go
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Original file line number Diff line number Diff line change
Expand Up @@ -47,4 +47,12 @@ func main() {
// [synchronization](channel-synchronization) approach
// we saw earlier.
<-done

// It is possible to read more from an empty closed channel.
// However, instead of waiting for a message, we will always
// immediately receive a zero value of the channel's type and
// a false bool flag indicating that we should stop reading from it.
j, isOpened := <-jobs
fmt.Println("no jobs to receive", j)
fmt.Println("awaiting more jobs:", isOpened)
}
4 changes: 2 additions & 2 deletions examples/closing-channels/closing-channels.hash
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
8f26c901e0f14df2ca40329a354c3ac86a5c3a07
vCvRjcMq7p3
3b474131d4d983ac5e53d8a6b94e069a8a4b775d
yLh6yhTGZeF
2 changes: 2 additions & 0 deletions examples/closing-channels/closing-channels.sh
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Expand Up @@ -7,6 +7,8 @@ sent job 3
received job 3
sent all jobs
received all jobs
no jobs to receive 0
awaiting more jobs: false

# The idea of closed channels leads naturally to our next
# example: `range` over channels.
26 changes: 22 additions & 4 deletions public/closing-channels
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