golang slice copy

slice_copy.go

package main

import "fmt"

func copyNg() {
  src := []int{0, 1, 2, 3, 4}

  dest := src[0:1]
  dest = append(dest, src[4:5]...)

  fmt.Println(src) // => [0 4 2 3 4]
}

func copyOk() {
  src := []int{0, 1, 2, 3, 4}

  dest := make([]int, 0)
  dest = append(dest, src[0:1]...)
  dest = append(dest, src[4:5]...)

  fmt.Println(src) // => [0 1 2 3 4]
}

func main() {
  copyNg()
  copyOk()
}