replication too

search.go

@@ -25,11 +25,22 @@ func fakeSearch(kind string) Search {
 	}
 }
 
+func First(query string, replicas ...Search) Result {
+	c := make(chan Result)
+	searchReplica := func(i int) {
+		c <- replicas[i](query)
+	}
+	for i := range replicas {
+		go searchReplica(i)
+	}
+	return <-c
+}
+
 func Google(query string) (results []Result) {
 	c := make(chan Result)
-	go func() { c <- Web(query) }()
+	go func() { c <- First(query, Web, Web) }()
-	go func() { c <- Image(query) }()
+	go func() { c <- First(query, Image, Image) }()
-	go func() { c <- Video(query) }()
+	go func() { c <- First(query, Video, Video) }()
 
 	timeout := time.After(80 * time.Millisecond)
 	for i := 0; i < 3; i++ {