I think this explains it pretty well: Common Mistakes: Using goroutines on
loop iterator variables
<https://github.com/golang/go/wiki/CommonMistakes#using-goroutines-on-loop-iterator-variables>
On Thursday, February 17, 2022 at 11:45:39 AM UTC-5 yan.z...@gmail.com
wrote:
> package main
> import "fmt"
>
> func main() {
> targetIndice := make([]int, 3)
> targetIndice[0] = 5
> targetIndice[2] = 4
>
> for i,n := range targetIndice{
> fmt.Printf("%d : %d \n", i, n)
> }
>
> c := make(chan int)
> for i, n:= range targetIndice{
> go func(){
> fmt.Printf("targetIndice[%d]=%d \n", i, n)
> c <- 1
> }()
> }
>
> for i:=0; i<3; i++{
> <- c
> }
>
> }
>
> -----go run main.go---------
> 0 : 5
> 1 : 0
> 2 : 4
> targetIndice[2]=4
> targetIndice[2]=4
> targetIndice[2]=4
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