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Created February 6, 2019 11:36
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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 "".
package main
import "fmt"
type IPAddr [4]byte
// TODO: Add a "String() string" method to IPAddr.
func (ip IPAddr) String() string {
return fmt.Sprintf("%v.%v.%v.%v", ip[0], ip[1], ip[2], ip[3])
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)
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