change netdb API to return ok bool instead of errors

dominikh · dominikh · commit 0773afc51ed5 · 2012-11-07T04:47:10.000+01:00
diff --git a/netstat-nat.go b/netstat-nat.go
@@ -71,10 +71,10 @@ func main() {
 
 	filteredFlows := flows.FilterByType(which)
 	if *protocol != "" {
-		protoent, err := netdb.GetProtoByName(*protocol)
-		if err != nil {
+		protoent, ok := netdb.GetProtoByName(*protocol)
+		if !ok {
 			// TODO descriptive error message
-			panic(err)
+			panic("Unknown protocol")
 		}
 		filteredFlows = filteredFlows.FilterByProtocol(protoent)
 	}

Original file line number	Diff line number	Diff line change
`@@ -71,10 +71,10 @@ func main() {`
`71`	`71`
`72`	`72`	`filteredFlows := flows.FilterByType(which)`
`73`	`73`	`if *protocol != "" {`
`74`		`- protoent, err := netdb.GetProtoByName(*protocol)`
`75`		`- if err != nil {`
	`74`	`+ protoent, ok := netdb.GetProtoByName(*protocol)`
	`75`	`+ if !ok {`
`76`	`76`	`// TODO descriptive error message`
`77`		`- panic(err)`
	`77`	`+ panic("Unknown protocol")`
`78`	`78`	`}`
`79`	`79`	`filteredFlows = filteredFlows.FilterByProtocol(protoent)`
`80`	`80`	`}`