JavaScript: The prototype Property

Nov 2, 20123 likes1,048 views

The document discusses JavaScript's prototype property and object-oriented programming. It explains that in JavaScript, objects inherit properties and methods from a prototype object, allowing for code reuse and extension of functionality. The prototype is an object that is shared among objects created from the same constructor function. All objects in JavaScript inherit from the Object prototype by default.

JavaScript
The prototype Property

Thursday, November 1, 12

Brief

What’s OOP?

JavaScript OOP

Prototype

Inheritance

Thursday, November 1, 12

What’s OOP?
Introducir a OOP
Presentar el vocabulario

Thursday, November 1, 12

Object Oriented Programming

Thursday, November 1, 12

Programming paradigm

Thursday, November 1, 12

Data abstraction

Encapsulation

Messaging

Modularity

Polymorphism

Inheritance

Thursday, November 1, 12

Use object based on the real
world

Thursday, November 1, 12

Class vs Object

Thursday, November 1, 12

Class

A Class deﬁnes Objects

Properties
An object characteristic, such as color

Methods
An object capability, such as walk

Thursday, November 1, 12

Objects

A instance of a Class

Share properties and behavior

Unique

Thursday, November 1, 12

Class

Object1

Thursday, November 1, 12

Class

Object1 Object2

Thursday, November 1, 12

Class

Object1 Object2 Object3

Thursday, November 1, 12

JavaScript OOP
Aplicar JavaScript OOP

Thursday, November 1, 12

JavaScript is a
prototypal language

Thursday, November 1, 12

Prototype-based
programming
Class free

Classes are not present

Not Object Oriented

Everything is public

Objects inherits from another objects

Thursday, November 1, 12

Objects in JavaScript

Thursday, November 1, 12

Everything is an object

Thursday, November 1, 12

Arrays

Everything is an object

Thursday, November 1, 12

Arrays
Dates

Everything is an object

Thursday, November 1, 12

Arrays
Dates

Everything is an object

Objects

Thursday, November 1, 12

Arrays
Dates

Everything is an object

Objects

Strings
Thursday, November 1, 12

Arrays
Dates

Everything is an object

Numbers Objects

Strings
Thursday, November 1, 12

They have methods and
properties

Thursday, November 1, 12

Custom Objects

Thursday, November 1, 12

Not reuse

Unique

Thursday, November 1, 12

Not reuse

Singleton
Pattern

Unique

Thursday, November 1, 12

Constructor
Functions

Classes

Create diferents instances ==> Objects

Use new operator

Accepts parameters

Returns an instance ==> Object

Thursday, November 1, 12

Constructor
Has properties and methods

length

constructor

apply()

call()

prototype

Thursday, November 1, 12

Prototype

A property

Deﬁnes properties and methods to all
instances

Works with new operator

Stored in the memory once

Contain an Object

initial value === empty Object === {}
Thursday, November 1, 12

Inheritance
A new “class” is created from another “class”

Extends functionality

Deﬁnes new attributes and methods

A way to reuse code

All Object inherit from Object.prototype

12+ ways to inherits in JS

Thursday, November 1, 12

Prototype Chaining
Pseudo-clasical

Thursday, November 1, 12

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JavaScript: The prototype Property

1. JavaScript The prototype Property Thursday, November 1, 12

2. Brief What’s OOP? JavaScript OOP Prototype Inheritance Thursday, November 1, 12

3. What’s OOP? Introducir a OOP Presentar el vocabulario Thursday, November 1, 12

4. Object Oriented Programming Thursday, November 1, 12

5. Programming paradigm Thursday, November 1, 12

6. Data abstraction Encapsulation Messaging Modularity Polymorphism Inheritance Thursday, November 1, 12

7. Use object based on the real world Thursday, November 1, 12

8. Class vs Object Thursday, November 1, 12

9. Class A Class deﬁnes Objects Properties An object characteristic, such as color Methods An object capability, such as walk Thursday, November 1, 12

10. Objects A instance of a Class Share properties and behavior Unique Thursday, November 1, 12

11. Class Thursday, November 1, 12

12. Class Object1 Thursday, November 1, 12

13. Class Object1 Object2 Thursday, November 1, 12

14. Class Object1 Object2 Object3 Thursday, November 1, 12

15. Exercise Thursday, November 1, 12

16. JavaScript OOP Aplicar JavaScript OOP Thursday, November 1, 12

17. JavaScript is a prototypal language Thursday, November 1, 12

18. Prototype-based programming Class free Classes are not present Not Object Oriented Everything is public Objects inherits from another objects Thursday, November 1, 12

19. Objects in JavaScript Thursday, November 1, 12

20. Everything is an object Thursday, November 1, 12

21. Arrays Everything is an object Thursday, November 1, 12

22. Arrays Dates Everything is an object Thursday, November 1, 12

23. Arrays Dates Everything is an object Objects Thursday, November 1, 12

24. Arrays Dates Everything is an object Objects Strings Thursday, November 1, 12

25. Arrays Dates Everything is an object Numbers Objects Strings Thursday, November 1, 12

26. They have methods and properties Thursday, November 1, 12

27. Thursday, November 1, 12

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30. Thursday, November 1, 12

31. Custom Objects Thursday, November 1, 12

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41. Not reuse Thursday, November 1, 12

42. Not reuse Unique Thursday, November 1, 12

43. Not reuse Singleton Pattern Unique Thursday, November 1, 12

44. Exercise Thursday, November 1, 12

45. Constructors Thursday, November 1, 12

46. Constructor Functions Classes Create diferents instances ==> Objects Use new operator Accepts parameters Returns an instance ==> Object Thursday, November 1, 12

47. Thursday, November 1, 12

48. Thursday, November 1, 12

49. Constructor Has properties and methods length constructor apply() call() prototype Thursday, November 1, 12

50. Thursday, November 1, 12

51. Prototype Thursday, November 1, 12

52. Prototype A property Deﬁnes properties and methods to all instances Works with new operator Stored in the memory once Contain an Object initial value === empty Object === {} Thursday, November 1, 12

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58. Thursday, November 1, 12

59. Thursday, November 1, 12

60. Inheritance Thursday, November 1, 12

61. Inheritance A new “class” is created from another “class” Extends functionality Deﬁnes new attributes and methods A way to reuse code All Object inherit from Object.prototype 12+ ways to inherits in JS Thursday, November 1, 12

62. Prototype Chaining Pseudo-clasical Thursday, November 1, 12

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