Detect surrogate pair on Golang

detect_nullbyte.go

package main

import (
	"fmt"
)

func detect_nullbyte(str string) bool {
  for _, b := range str {
    if b == '\u0000' {
      return true
    }
  }
  return false
}

func main() {
	notExists := "Golang"
	exists := "Golang\000"

	fmt.Println(detect_nullbyte(notExists)) // => false
	fmt.Println(detect_nullbyte(exists))    // => true
}

detect_surrogate_pair.go

package main

import (
	"fmt"
)

func detect_surrogate(str string) bool {
	return (len([]byte(str)) % len([]rune(str))) > 0
}

func main() {
	notExists := "吉野家で鯵"
	exists := "𠮷野家で𩸽"

	fmt.Println(detect_surrogate(notExists)) // => false
	fmt.Println(detect_surrogate(exists))    // => true
}