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A Tour of Go - Methods and interfaces - Exercise: Stringers
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| package main | |
| import "fmt" | |
| type IPAddr [4]byte | |
| // TODO: Add a "String() string" method to IPAddr. | |
| func (a IPAddr) String() string { | |
| return fmt.Sprintf("%d.%d.%d.%d", a[0], a[1], a[2], a[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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