Last active
November 1, 2022 15:53
-
-
Save rakyll/1aa860377dab8fd445431bbb3204f600 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package main | |
import ( | |
"context" | |
"fmt" | |
) | |
func gen(ctx context.Context) <-chan int { | |
ch := make(chan int) | |
go func() { | |
var n int | |
for { | |
select { | |
case <-ctx.Done(): | |
return | |
case ch <- n: | |
n++ | |
} | |
} | |
}() | |
return ch | |
} | |
func main() { | |
ctx, cancel := context.WithCancel(context.Background()) | |
defer cancel() | |
for n := range gen(ctx) { | |
fmt.Println(n) | |
if n == 5 { | |
cancel() | |
break | |
} | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
@gerep It is duplicated I believe.
check the
example
ofWithCancel
doc: https://golang.org/pkg/context/#WithCancel