Index: typescript/src/index.ts
===================================================================
diff -u -rfa30bc920677c99798fd0d29670c4ad28f83c4c2 -r4e7a4498005f8e51d60fabd375b93ab017792989
--- typescript/src/index.ts	(.../index.ts)	(revision fa30bc920677c99798fd0d29670c4ad28f83c4c2)
+++ typescript/src/index.ts	(.../index.ts)	(revision 4e7a4498005f8e51d60fabd375b93ab017792989)
@@ -6,17 +6,16 @@
 import CarImpl from "./standard/CarImpl";
 import CarExtImpl from "./standard/CarExtImpl";
 import ObjExtCarImpl from "./standard/ObjExtCarImpl";
+import Car from "./standard/Car";
 
 //인터페이스로 객체 Person 을 만들어서 loop 돌리는 예제
 let persons: IPerson[] = R.range(0, 5)
     .map((n: number) => new Person("이동민", 99));
 console.log(persons);
 
-
 testMakePerson();
 
 
-
 //object 타입으로 정확하게는 리터럴 객체 선언
 /**
  * interface 인터페이스 이름 {
@@ -79,15 +78,17 @@
 }
 console.log("인터페이스 객체 -> " + user1.gender);
 console.log("물음표 -> " + user2.gender);
-console.log("키벨류 사용 -> " + user3["1"]);
+console.log("키벨류 사용 -> " + user3[2]); // ----- deep dive
 
 
 // 진짜 인터페이스 사용은 이런것이다.
-const carImpl = new CarImpl();
+const carImpl:Car = new CarImpl();
 console.log("<- CarImpl 사용 -> ");
 carImpl.start();
 carImpl.stop();
 
+var test:Car = new CarImpl();
+
 // 인터페이스 확장 인스턴스 샘플
 const carExtImpl = new CarExtImpl();
 console.log("<- carExtImpl 사용 -> ");
Index: typescript/src/standard/CarImpl.ts
===================================================================
diff -u -rd4cc210eef3c63f46a7de2e7f2d96b3099520225 -r4e7a4498005f8e51d60fabd375b93ab017792989
--- typescript/src/standard/CarImpl.ts	(.../CarImpl.ts)	(revision d4cc210eef3c63f46a7de2e7f2d96b3099520225)
+++ typescript/src/standard/CarImpl.ts	(.../CarImpl.ts)	(revision 4e7a4498005f8e51d60fabd375b93ab017792989)
@@ -1,7 +1,8 @@
 import Car from "./Car";
+import Kakao from "./Kakao";
 
 //CarImpl 클래스 선언
-export default class CarImpl implements Car {
+export default class CarImpl implements Car, Kakao {
     name = "K5";
     color = "white";
     start(){
@@ -11,4 +12,9 @@
     stop(){
         console.log("정차");
     }
+
+    message = "hi"
+    send() {
+        console.log("message send");
+    }
 }
\ No newline at end of file
FishEye: Tag d2133460ec003f42375d401a6329c35714b65209 refers to a dead (removed) revision in file `typescript/src/standard/Kakao.ts'.
FishEye: No comparison available.  Pass `N' to diff?
FishEye: Tag d2133460ec003f42375d401a6329c35714b65209 refers to a dead (removed) revision in file `typescript/src/standard/KakaoImpl.ts'.
FishEye: No comparison available.  Pass `N' to diff?
Index: typescript/src/standard/ObjExtCarImpl.ts
===================================================================
diff -u -rfa30bc920677c99798fd0d29670c4ad28f83c4c2 -r4e7a4498005f8e51d60fabd375b93ab017792989
--- typescript/src/standard/ObjExtCarImpl.ts	(.../ObjExtCarImpl.ts)	(revision fa30bc920677c99798fd0d29670c4ad28f83c4c2)
+++ typescript/src/standard/ObjExtCarImpl.ts	(.../ObjExtCarImpl.ts)	(revision 4e7a4498005f8e51d60fabd375b93ab017792989)
@@ -1,12 +1,20 @@
 import CarExtImpl from "./CarExtImpl";
+import KakaoImpl from "./KakaoImpl";
+import CarExt from "./CarExt";
 
+interface Duck {
+    checkType: string
+}
+
 //ObjExtCarImpl 클래스 선언
-export default class ObjExtCarImpl extends CarExtImpl {
+export default class ObjExtCarImpl extends CarExtImpl implements Duck{
 
     constructor(name: string, color: string, car_name: string) {
         super();
         this.name = name;
         this.color = color;
         this.car_name = car_name;
     }
+
+    checkType = "check";
 }
\ No newline at end of file