package learning

import "fmt"

type Person struct {
  Name string
  Age int
}

func(p Person) String() string {
  return fmt.Sprintf("%v (%v years)", p.Name, p.Age)
}

func StringersLearnings(){
  a := Person{"Arthur Dent", 42}
  z := Person{"Jopka Slona", 9001}
  fmt.Println(a, z)
}

// Stringer exercise - IP address

type IPAddr [4]byte

func (ip IPAddr) String() string {
  // Bruteforce way
  // return fmt.Sprintf("%v.%v.%v.%v", ip[0], ip[1], ip[2], ip[3])
  // For-loop way
  result := ""
    for i := 0; i < len(ip); i++ {
        if i > 0 {
            result += "."
        }
        result += fmt.Sprintf("%v", ip[i])
    }
    return result
}

func StringersExercise(){
  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)
	}
}