On Mon, Aug 7, 2017 at 9:23 PM Gert <gert.cuyk...@gmail.com> wrote:
> Can append or the compiler be made to prevent or warn for bugs like this?
No. Slice is a value and append accepts s not &s as its first argument.
That means the new slice value need be returned for code that uses the
resulting slice, which is the case most often seen.
> func main() {
> a := []byte("Help")
> b := append(a, []byte(" Me ")...)
> c := append(a, []byte(" Her")...)
> fmt.Println(string(a), "-", string(b), "-", string(c))
> }
Does this code really output what you want it to output?
https://play.golang.org/p/DWQXtkGByv
Assigning the result value of append to a different variable than its first
argument is completely valid, but one has to be really sure why to do that.
Did you mean https://play.golang.org/p/-OMw3qGYjU ?
--
-j
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