Hi all,
I am a little confused about the parameters of Go closure. For example:
package main
> import (
> "fmt"
> "time"
> )
> func main() {
> for i := 1; i <= 2; i++ {
> go func(j int) {
> fmt.Println(j, i)
> }(i)
> }
> time.Sleep(time.Second)
> }
The running result is:
> 1 3
> 2 3
Except "go func(j int) { fmt.Println(j, i)}(i)", I find the following code
isalso valid:
> go func(i int) { fmt.Println(i)}(i)
> go func(int) { fmt.Println(i)}(i)
I refer to spec, but only find https://golang.org/ref/spec#Function_literals,
and it doesn't seem to elaborate the parameter rules of closure very
clearly.
Could any help to explain it in detail? Thanks very much in advance!
Best Regards
Nan Xiao
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