JavaScript learning note--8. Object oriented

1. Encapsulation--Initialization mode

var Cat = {
Name: ' Jack ',
Age:5,
Say:function () {
Alert (' Hello world! ');
}
}

Or:

var Cat = {}
Cat.name = ' Jack ';
Cat.age = 5;
Cat.say = function () {
Alert (' Hello world! ');
}

alert (cat.name);
Cat.say ();

2. Package--object mode

function Cat (name,age) {
var c = new Object ();
C.name = name;
C.age = age;
return C;
}

var cat1 = Cat (' Jack ', 5);

alert (cat1.name);

3. Encapsulation--constructor function mode

function Cat (name,age) {
THIS.name = name;
This.age = age;
}
Cat.prototype.say = function () {//Use prototype to point to the same memory address for the same attribute/method in multiple instances
Alert (' Hello world! ');
}

var cat1 = new Cat (' Jack ', 5);

alert (cat1.name);
Cat1.say ();

4. Traverse

for (var c in cat1) {
alert (c);//Popup All properties of the object
Alert (cat1[c]);//The value of all properties of the Popup object
}

5. Inheriting--apply mode

function Animal () {
this.species = ' animals ';
}
function Cat (name) {
Animal.apply (this, arguments);
THIS.name = name;
}

var cat1 = new Cat (' Jack ');

alert (cat1.species);

6. Inheriting--prototype mode

function Animal () {
this.species = ' animals ';
}
function Cat (name) {
THIS.name = name;
}
Cat.prototype = new Animal ();//The prototype of cat is pointed to Animal
Cat.prototype.constructor = cat;//corrects an instance of cat to inherit cat

var cat1 = new Cat (' Jack ');

alert (cat1.species);

7. polymorphic

Define abstract methods in a class (format the method only, do not do any specific implementation)

A class with an abstract method becomes an abstract class that does not derive any instances and is used only for the Quilt class inheritance

After the subclass inherits, according to own demand, then carries on the concrete implementation to the original parent class abstract method

This process is called "polymorphism."

@zhnoah
Source: http://www.cnblogs.com/zhnoah/
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JavaScript learning note--8. Object oriented