Go strings as bytes and runes: 3 for loops and 2 slices

rune-byte-strings.go

package main

import (
	"fmt"
)

// Try it out here: https://repl.it/@glxxyz/RoundedNormalFunction
// It's important to note the different values that 'index' takes
// when using []rune and range

func main() {
	s := "HSK东西"

	for i:=0; i<len(s); i++ {
		fmt.Printf("[]byte: index %v int %v char %c\n", i, s[i], s[i])
	}
	fmt.Println("")

	runes := []rune(s)
	for i:=0; i<len(runes); i++ {
		fmt.Printf("[]rune: index %v int %v char %c\n", i, runes[i], runes[i])
	}
	fmt.Println("")

	for i, x := range s {
		fmt.Printf("range: index %v int %v char %c\n", i, x, x)
	}
	fmt.Println("")

	var fromByteWithoutFirstLast string = s[1:len(s)-1]
	fmt.Printf("from byte array without first and last: %v\n", fromByteWithoutFirstLast)

	var fromRuneWithoutFirstLast string = string(runes[1:len(runes)-1])
	fmt.Printf("from rune array without first and last: %v\n", fromRuneWithoutFirstLast)
}

/*

Output:

[]byte: index 0 int 72 char H
[]byte: index 1 int 83 char S
[]byte: index 2 int 75 char K
[]byte: index 3 int 228 char ä
[]byte: index 4 int 184 char ¸
[]byte: index 5 int 156 char 
[]byte: index 6 int 232 char è
[]byte: index 7 int 165 char ¥
[]byte: index 8 int 191 char ¿

[]rune: index 0 int 72 char H
[]rune: index 1 int 83 char S
[]rune: index 2 int 75 char K
[]rune: index 3 int 19996 char 东
[]rune: index 4 int 35199 char 西

range: index 0 int 72 char H
range: index 1 int 83 char S
range: index 2 int 75 char K
range: index 3 int 19996 char 东
range: index 6 int 35199 char 西

from byte array without first and last: SK东�
from rune array without first and last: SK东

 */