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fix: wording

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thetnaingtn 2023-10-14 20:17:59 +07:00
parent 280343552e
commit 42221294dc
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docs/index.md
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@ -1692,7 +1692,7 @@ You should have a good reason to specify a channel size other than one for buffe
To accurately use `sync.WaitGroup`, call the `Add` method before spinning up goroutines. To accurately use `sync.WaitGroup`, call the `Add` method before spinning up goroutines.
Calling `sync.WaitGroup.Add` method inside goroutine can lead to data race since child goroutine can run at any time in any order. There is no guarantee that main go routine will have the correct counter to wait until it become zero. Calling `sync.WaitGroup.Add` method inside goroutine can lead to data race since child goroutine can run at any time in any order. There is no guarantee that main goroutine will have the correct counter to wait until it become zero.
```go ```go
wg := sync.WaitGroup{} wg := sync.WaitGroup{}
var v uint64 var v uint64
@ -1704,7 +1704,7 @@ for i := 0; i < 3; i++ {
}() }()
} }
wg.Wait() wg.Wait()
fmt.Println(v) fmt.Println(v) // can print any value from 0 to 3.
``` ```
To deterministically set the counter, the `wg.Add` should be called before spinning up the goroutine: To deterministically set the counter, the `wg.Add` should be called before spinning up the goroutine:
```go ```go