Get rune from string.

get_rune_at.go

package main

import (
  "fmt"
)

func main() {
  s := "日本語"
  fmt.Println(string(s[0])) // => æ
  fmt.Println(string(getRuneAt(s, 0))) // => 日
}

func getRuneAt(s string, i int) rune {
  rs := []rune(s)
  return rs[i]
}