JS-Implementing Object-oriented

<title>js– implementing Object-oriented</title> js– implementing object-oriented table of Contents

• Public and private
• Inherited
  • Inheriting through prototypes
  • Object Impersonation
  • Object replication
  • Implementing object Inheritance through Call/apply
• Prototype
• TODO Factory method

Public and private

function  Person() {var name="ABC";// Private    var  Age= 100;// Private     This. Show =function() {// public methods, you can only do this if you want to access private variablesWindow.alert (' name = '+ name); };function F() {Alert (' This is a private method '); }}p.new_func =function() {document.write (' I want to access to private FAIL '); alert (p.name);// undefined};p. New_func ();

Inheritance inherits through prototypes

function Tiger () {}functioncat() {This    function () {        alert (' cat Cat ')}    }} Tiger. prototype New Cat (); var T1 New Tiger (); var C1 New Cat (); t1.climb ();

Object Impersonation

function Animal(name, Age) { This. name = name; This. Age = Age;}function Dog(name, Age) { This. Animal = animal; This. Animal (name, age);}var Dog=New Dog(' a dog ', 2);d ocument.write (dog.name);if(Doginstanceof Animal) {alert (' Dog is an example of Animal ');// is a}

Object replication

function Cat() { This. Climb =function() {Alert (' Cat cat '); }}function Tiger() { This. Extend =function(Parent) { for(var Key inchParent) { This[Key] = Parent[key]; }    }}var T1=New Tiger(); T1.extend (New Cat()); t1.climb ();

Implementing object Inheritance through Call/apply

function Stu(name, Age) { This. name = name; This. Age = Age; This. Show =function() {Alert ( This. Name +' age is '+ This. age); }}function Midstu(name, Age) {Stu.call ( This, name, age);}var m=New Midstu(' One ', m.show);

function Cat() { This. Climb =function() {Alert (' Cat cat '); }}function Tiger() { This. parent = cat; This. parent.apply ( This,arguments);Delete  This. Parent;}var T1=New Tiger();var C1=New Cat(); t1.climb ();

function Dog() {Dog.prototype. Shout =function() {document.write ("Wang Wang Wang"); };}var Dog=New Dog();d og.shout ();// add a Find method to the arrayArray.prototype. Find =function(Val) {var Len= This. length; for(var I= 0; i < Len; i++) {if(val = = This[i]) {returnI }    }};

Prototype

The benefits of prototyping: Creating new methods, new properties, saving memory is not repeated

function Dog(name) { This. name = name; This. Func =function() {Alert (' .... '); };}var Dog1=New Dog(' AA ');var dog2=New Dog(' BB ');if(Dog1.func = = Dog2.func) {// Output Not EqualAlert' equal ');}Else{Alert (' Not equal ');} Dog.prototype. Func2 =function() {Alert (' New fun ');};var Dog3=New Dog(' AA ');var Dog4=New Dog(' BB ');if(Dog3.func2 = = DOG4.FUNC2) {// Output EqualAlert' equal ');}Else{Alert (' Not equal ');}

TODOFactory method

This can be used if the object is only one, not inherited ... (Factory method) var P New Object ();p. Name = .... P.age = ...

JS-Implementing Object-oriented