update

Darylxyx · Darylxyx · commit 87e0d9dfd40e · 2017-11-22T17:29:19.000+08:00
diff --git a/OO/inherit.html b/OO/inherit.html
@@ -155,28 +155,55 @@
 //【原型式继承】
 
 //【寄生式继承】
-function createAnother(original) {
-	var clone = Object.create(original);
-	clone.sayHi = function() {
-		console.log('hi');
-	};
-	return clone;
-}
+// function createAnother(original) {
+// 	var clone = Object.create(original);
+// 	clone.sayHi = function() {
+// 		console.log('hi');
+// 	};
+// 	return clone;
+// }
 
-var person = {
-	name: 'abc',
-	firends: ['Shelby', 'Court', 'Van']
-};
+// var person = {
+// 	name: 'abc',
+// 	firends: ['Shelby', 'Court', 'Van']
+// };
 
-var anotherPerson = createAnother(person);
-anotherPerson.sayHi();
+// var anotherPerson = createAnother(person);
+// anotherPerson.sayHi();
 
 //寄生式继承问题
 //在主要考虑对象而不是自定义类型和构造函数的情况下，寄生式继承也是一种有用的模式。
+//使用寄生式继承来为对象添加函数，会由于不能做到函数复用而降低效率；这一点与借用构造函数类似。
 
 //【寄生式继承】
 
-//寄生组合式继承
+//【寄生组合式继承】
+function inheritPrototype(subType, superType) {
+	var prototype = Object.create(superType.prototype);
+	prototype.constructor = subType;
+	subType.prototype = prototype;
+}
+
+function SuperType(name) {
+	this.name = name;
+	this.colors = ['red', 'blue', 'green'];
+}
+
+SuperType.prototype.sayName = function() {
+	console.log(this.name);
+};
+
+function SubType(name, age) {
+	SubType.call(this, name);
+	this.age = age;
+}
+
+inheritPrototype(SubType, SuperType);
+
+SubType.prototype.sayAge = function() {
+	console.log(this.age);
+};
+//【寄生组合式继承】
 
 </script>
 </body>
