update readme

README.md

@@ -13,6 +13,7 @@ XGo contains various useful features for gohers.
 - Chunk
 - Exponential backoff
 - Struct to map
+- Obtain pointers to types
 
 ## Install
 ```
@@ -117,3 +118,32 @@ fmt.Println("contains struct:", containsStruct)
 // contains float64: true
 // contains struct: true
 ```
+
+### New
+Obtain pointers to types
+```go
+type Vegetables string
+
+const (
+	Pea     Vegetables = "Pea"
+	Okra    Vegetables = "Okra"
+	Pumpkin Vegetables = "Pumpkin"
+)
+
+type Model struct {
+	ID        *int
+	Name      *string
+	Material  *Vegetables
+	CreatedAt *time.Time
+}
+
+func ExampleNew() {
+	obj := Model{
+		ID:        xgo.New(123),
+		Name:      xgo.New("R2D2"),
+		Material:  xgo.New(Pea),
+		CreatedAt: xgo.New(time.Date(2020, 6, 1, 0, 0, 0, 0, time.UTC)),
+	}
+	fmt.Println("object:", obj)
+}
+```

example_test.go

@@ -111,5 +111,4 @@ func ExampleNew() {
 		CreatedAt: xgo.New(time.Date(2020, 6, 1, 0, 0, 0, 0, time.UTC)),
 	}
 	fmt.Println("object:", obj)
-
 }