Hi, you want to use append, not copy:
https://play.golang.org/p/1TXCsC4-GJ
On Sunday, October 2, 2016 at 5:18:42 PM UTC+3, 高橋誠二 wrote:
>
> As official doc explains, copy to zero length slice results to be empty.
>
> package main
>
> import "fmt"
>
> func main() {
> src := []int{1, 2, 3}
> dst := []int{}
> fmt.Println(len(dst))
> copy(dst, src)
> fmt.Println(src)
> fmt.Println(dst)
> // [1 2 3]
> // []
>
> src2 := []int{1, 2, 3}
> dst2 := make([]int, len(src))
> copy(dst2, src2)
> fmt.Println(src2)
> fmt.Println(dst2)
> // [1 2 3]
> // [1 2 3]
> }
>
>
>
> But it seems unusual, is it should be like following?
>
> package main
>
> import "fmt"
>
> func main() {
> src := []int{1, 2, 3}
> dst := []int{}
> fmt.Println(len(dst))
> copy(dst, src)
> fmt.Println(src)
> fmt.Println(dst)
> // [1 2 3]
> // [1 2 3]
> }
>
>
>
--
You received this message because you are subscribed to the Google Groups
"golang-nuts" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to golang-nuts+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
