A Tour of Go Exercise: Stringers

exercise_stringers.go

package main

import (
  "strings"
  "fmt"
)

type IPAddr [4]byte

func (ips IPAddr) String() string {
  var ips_string [4]string
  for i, ip := range ips {
  ips_string[i] = fmt.Sprint(ip)
}
  return strings.Join(ips_string[:], ",")
}

func main() {
	hosts := map[string]IPAddr{
		"loopback":  {127, 0, 0, 1},
		"googleDNS": {8, 8, 8, 8},
	}
	for name, ip := range hosts {
		fmt.Printf("%v: %v\n", name, ip)
	}
}

Other method to convert byte number to string:
s := strconv.Itoa(int(byte))
https://golang.cafe/blog/golang-int-to-string-conversion-example.html