How to manipulate strings in GO to reverse them?

Question

I\'m trying to invert a string in go but I\'m having trouble handling the characters. Unlike C, GO treats strings as vectors of bytes, rather than characters, which are call

Answer 1

As you correctly identified, go strings are immutable, so you cannot assign to rune/character values at given indices.

Instead of reversing the string in-place one must create a copy of the runes in the string and reverse those instead, and then return the resulting string.

For example (Go Playground):

func reverse(s string) string {
  rs := []rune(s)
  for i, j := 0, len(rs)-1; i < j; i, j = i+1, j-1 {
    rs[i], rs[j] = rs[j], rs[i]
  }
  return string(rs)
}

func main() {
  fmt.Println(reverse("Hello, World!"))
  // !dlroW ,olleH
  fmt.Println(reverse("Hello, 世界!"))
  // !界世 ,olleH
}

There are problems with this approach due to the intricacies of Unicode (e.g. combining diacritical marks) but this will get you started.