get 5 random objs from array

func randomObjs(objs []interface{}) []interface{} {
  n := 5
  if n > len(objs) {
    n = len(objs)
  }
  newObjs := make([]interface{}, n)
  for i := 0; i < n; i++ {
    rand.Seed(time.Now().UnixNano())
    newObjs[i] = objs[rand.Intn(len(objs))]
  }
  return newObjs
}