Add StringCmd helpers.

command.go

@@ -337,6 +337,27 @@ func (cmd *StringCmd) Result() (string, error) {
 	return cmd.val, cmd.err
 }
 
+func (cmd *StringCmd) Int64() (int64, error) {
+	if cmd.err != nil {
+		return 0, cmd.err
+	}
+	return strconv.ParseInt(cmd.val, 10, 64)
+}
+
+func (cmd *StringCmd) Uint64() (uint64, error) {
+	if cmd.err != nil {
+		return 0, cmd.err
+	}
+	return strconv.ParseUint(cmd.val, 10, 64)
+}
+
+func (cmd *StringCmd) Float64() (float64, error) {
+	if cmd.err != nil {
+		return 0, cmd.err
+	}
+	return strconv.ParseFloat(cmd.val, 64)
+}
+
 func (cmd *StringCmd) String() string {
 	return cmdString(cmd, cmd.val)
 }

example_test.go

@@ -40,14 +40,23 @@ func ExampleNewFailoverClient() {
 }
 
 func ExampleClient() {
-	set := client.Set("foo", "bar")
-	fmt.Println(set.Err())
+	if err := client.Set("foo", "bar").Err(); err != nil {
+		panic(err)
+	}
 
 	v, err := client.Get("hello").Result()
-	fmt.Printf("%q %s %v", v, err, err == redis.Nil)
+	fmt.Printf("%q %q %v", v, err, err == redis.Nil)
+	// Output: "" "redis: nil" true
+}
 
-	// Output: <nil>
-	// "" redis: nil true
+func ExampleClient_Incr() {
+	if err := client.Incr("counter").Err(); err != nil {
+		panic(err)
+	}
+
+	n, err := client.Get("counter").Int64()
+	fmt.Println(n, err)
+	// Output: 1 <nil>
 }
 
 func ExampleClient_Pipelined() {

redis_test.go

@@ -408,6 +408,23 @@ func (t *RedisTest) TestManyKeys2(c *C) {
 	c.Assert(vals[100001], Equals, nil)
 }
 
+func (t *RedisTest) TestStringCmdHelpers(c *C) {
+	set := t.client.Set("key", "10")
+	c.Assert(set.Err(), IsNil)
+
+	n, err := t.client.Get("key").Int64()
+	c.Assert(err, IsNil)
+	c.Assert(n, Equals, int64(10))
+
+	un, err := t.client.Get("key").Uint64()
+	c.Assert(err, IsNil)
+	c.Assert(un, Equals, uint64(10))
+
+	f, err := t.client.Get("key").Float64()
+	c.Assert(err, IsNil)
+	c.Assert(f, Equals, float64(10))
+}
+
 //------------------------------------------------------------------------------
 
 func (t *RedisTest) TestAuth(c *C) {