java scrip to op

8/2/2019 Java Scrip to Op

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Object Oriented Programming

in JavaScript

PhuongH


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Introduction Introduction about using Object

Oriented in JavaScript programming.

Knowledge requirements:

Object Oriented Programming.

JavaScript


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Content

Working with object in JavaScript.

Object Oriented Programing goals. OOP in JavaScript.

Summary.


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Content



Summary.


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Working with object

in JavaScript Built-in object type in JavaScript.

There are several ways to create anobject in JavaScript.

Example 3

Example 1 Example 2


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Content



Summary.


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Object Oriented Programing

goalsAbstract.

Encapsulation. Inheritance.

Polymorphism.


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Content



Summary.


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OOP in JavaScript

JavaScriptIS NOT a Object Orientedlanguage like C++,C#, Java,

Using JavaScripts characters to obtain theOOP goals.


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OOP in JavaScript - Content

Class and access modifiers

Inheritance & Polymorphism


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OOP in JavaScript

Defining class Using function declaration to define a class.

Example: define a simple class Student


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OOP in JavaScript

Access modifiers & Accessor

JavaScript does not have a reserve word formaking a variable private, JavaScript gives

us the tools to create the same effect Define functions get and set to work as

accessor.


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OOP in JavaScript

Access modifiers & Accessor(cont.)


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OOP in

JavaScriptDynamicallyGenerated

Accessor


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OOP in JavaScript

Dynamically Generated Accessor

Not only do we keep our propertiesprivate, we avoid the need to specifyour arguments in order.

The following class instantiations are allequivalent


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OOP in JavaScript

Inheritance & Polymorphism Using JavaScritpt prototype object,

introduced starting in JavaScript 1.1, isa prebuilt object that simplifies theprocess of adding custom properties/methods to all instances of an object.

Examples


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OOP in JavaScript

Inheritance & Polymorphism(cont.)

Situation: we have 2 types of workers:wage-based and commission-based.

Each worker will have name, base onthe type, it will have some additionproperties.

The worker have method to calculate itsincome but in the different way base onits type.


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OOP in JavaScript

Inheritance & Polymorphism(cont.)

In this example, we will create a super-class called Worker and 2 sub-class:CommissionWorker and WageWorker.

This example will illustrate for the goalsInheritance and Polymorphism in OOP.


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Content



Summary.


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Summary

JavaScriptIS NOT a Object Orientedlanguage like C++,C#, Java,

The OOP goals is obtained by usingsome special JavaScripts characters.

JavaScript OOP obtain both 4

important goals of OOP.


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More information

www.google.com :D

www.w3schools.com www.webreference.com

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