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kennethzfeng/right.go

Created September 6, 2015 14:37
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Golang Gotchas
Raw
right.go
package main
import (
"fmt"
"sync"
)
func main() {
wg := &sync.WaitGroup{}
for _, v := range []int{1, 4, 7} {
v := v
wg.Add(1)
go func() {
fmt.Println(v)
wg.Done()
}()
}
wg.Wait()
}
Raw
wrong.go
package main
import (
"fmt"
"sync"
)
func main() {
wg := &sync.WaitGroup{}
for _, v := range []int{1, 4, 7} {
wg.Add(1)
go func() {
fmt.Println(v)
wg.Done()
}()
}
wg.Wait()
}
@christophberger
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christophberger commented Jun 28, 2016

Another right.go:

package main

import (
    "fmt"
    "sync"
)

func main() {
    wg := &sync.WaitGroup{}

    for _, v := range []int{1, 4, 7} {
        wg.Add(1)
        go func(n int) {
            fmt.Println(n)
            wg.Done()
        }(v)
    }

    wg.Wait()
}

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