package main

import "fmt"

type IPAddr [4]byte

func (ip IPAddr) String() string {
    return fmt.Sprintf("%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3])
}

// TODO: Add a "String() string" method to IPaddr

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)
    }
}