From a36ab8a96d9493fc0e3e148c2ca505fee8db86c6 Mon Sep 17 00:00:00 2001
From: antwonlee <antwonlee@gmail.com>
Date: Wed, 1 Jun 2016 01:50:45 -0500
Subject: [PATCH] Add inheritance in javascript

Good read: Inheritance and the prototype chain

https://goo.gl/Im9q4k
---
 object_oriented_javascript/playlist/media.js | 13 +++++++++++++
 object_oriented_javascript/playlist/song.js  | 12 ++----------
 2 files changed, 15 insertions(+), 10 deletions(-)
 create mode 100644 object_oriented_javascript/playlist/media.js

diff --git a/object_oriented_javascript/playlist/media.js b/object_oriented_javascript/playlist/media.js
new file mode 100644
index 0000000..be6fa6e
--- /dev/null
+++ b/object_oriented_javascript/playlist/media.js
@@ -0,0 +1,13 @@
+function Media(title, duration) {
+  this.title = title;
+  this.duration = duration;
+  this.isPlaying = false;
+}
+
+Media.prototype.play = function() {
+  this.isPlaying = true;
+};
+
+Media.prototype.stop = function() {
+  this.isPlaying = false;
+};
diff --git a/object_oriented_javascript/playlist/song.js b/object_oriented_javascript/playlist/song.js
index f9d6e20..90b6131 100644
--- a/object_oriented_javascript/playlist/song.js
+++ b/object_oriented_javascript/playlist/song.js
@@ -1,17 +1,9 @@
 function Song(title, artist, duration) {
-  this.title = title;
+  Media.call(this, title, duration);
   this.artist = artist;
-  this.duration = duration;
-  this.isPlaying = false;
 }
 
-Song.prototype.play = function() {
-  this.isPlaying = true;
-};
-
-Song.prototype.stop = function() {
-  this.isPlaying = false;
-};
+Song.prototype = Object.create(Media.prototype);
 
 Song.prototype.toHTML = function() {
   var htmlString = '<li';