/*
Exercise: Stringers
Make the IPAddr type implement fmt.Stringer to print the address as a dotted quad.
For instance, IPAddr{1, 2, 3, 4} should print as "1.2.3.4".
*/
package main
import (
"fmt"
"strconv"
"strings"
)
type iPAddr [4]byte
func (ip iPAddr) String() string {
arr := []string{"0", ".", "0", ".", "0", ".", "0"}
for i := 0; i < 4; i++ {
arr[i<<1] = strconv.Itoa(int(ip[i]))
}
sip := strings.Join(arr, "")
return sip
}
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)
}
}