[go-nuts] Using copy to copy slices

On 14 Oct 2013, at 19:52, Sankar wrote:

Hi,

I am unable to understand why copy is not copying the slice contents below.

http://play.golang.org/p/4Ag7Bmw7q2

package main

import "fmt"

func main() {
a := make([]int, 0, 10)
a = append(a, 1)
fmt.Println(a)
b := make([]int, 0, 10)
fmt.Println(copy(b, a))
fmt.Println(b)
}

Can someone explain if this is the intended behavior or is it a bug ?

Sankar
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On Mon, Oct 14, 2013 at 2:36 PM, Dave Cheney wrote:
You need to make sure the destination slice has enough space (not potential)
to accept the copy

http://play.golang.org/p/nrry4lAhMn

On 14 Oct 2013, at 19:52, Sankar wrote:

Hi,

I am unable to understand why copy is not copying the slice contents below.

http://play.golang.org/p/4Ag7Bmw7q2

package main

import "fmt"

func main() {
a := make([]int, 0, 10)
a = append(a, 1)
fmt.Println(a)
b := make([]int, 0, 10)
fmt.Println(copy(b, a))
fmt.Println(b)
}

Can someone explain if this is the intended behavior or is it a bug ?

Sankar

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