returning random json objects from problem

handlers.go

@@ -1,13 +1,32 @@
 package main
 
 import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"math/rand"
 	"net/http"
 )
 
 func attempt(w http.ResponseWriter, req *http.Request) {
-    w.Write([]byte("hello"))
+	operation := "+"
+	if r := rand.Intn(2); r == 0 {
+		operation = "-"
+	}
+
+	r := map[string]string{
+		"operation": operation,
+	}
+
+	b, err := json.Marshal(r)
+	if err != nil {
+		log.Fatal("issue with json marshalling")
+	}
+    j := string(b)
+	fmt.Println(j)
+	fmt.Fprintf(w, j)
 }
 
 func problem(w http.ResponseWriter, req *http.Request) {
-    w.Write([]byte("hello"))
+	fmt.Fprintf(w, "hello world")
 }

main.go

@@ -5,6 +5,8 @@ import (
 	"github.com/gorilla/sessions"
 	"log"
 	"net/http"
+    "math/rand"
+    "time"
 )
 
 var addr = flag.String("addr", ":8000", "address I'll listen on.")
@@ -13,6 +15,7 @@ var static_files = flag.String("static", "./static", "location of static files")
 var store = sessions.NewCookieStore([]byte("hello world"))
 
 func main() {
+    rand.Seed( time.Now().UTC().UnixNano())
 	flag.Parse()
 	http.Handle("/",
 		http.FileServer(http.Dir(*static_files)))