JavaScript

OOPS

oops stands for object oriented programming synopsis

object oriented programming in javascript:

------------------------------------------

*object oriented programming is based on following

things:

1.Encapsulation

2.Abstraction

3.Inheritance

4.Polymorphism

Before object oriented programming we had procedural programming that divide a program into set of functions so we hava data stored in a bunch of variables and functions that operate on data this style of programming is simple and straight forward.

Ex:C language is a procedural Programming language.

1.Encapsulation

binding|combining related variables and

functions as one unit

practicle:

class implements data encapsulation

2.Abstraction

hiding important|secured data is called

data abstraction,showing|exposing only necessary

things

practicle:

object creation,object will expose only

public things,private things will be hidden

user----->object------>class

| | |

only b a private+public

will be b a b

visible [memory]

3.Inheritance

creating new entity[class] based on

existing entity is called "inheritance"

this provides reusability

class: 1.parent class 2.child class

4.Polymorphsim-->poly + morphism

| |

many forms

many forms of a single entity|object is called

polymorphism

practicle:

methodoverloading

method overriding

Method overloading:Method overloading allows a class to define multiple methods with the same name but different signature.

Method overridding:In oop programming language, Overridding is a feauture that allows a subclass or child class to provide a specific implementation of method that is already provided by the super class or parent class.