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  • Book Overview & Buying Object-Oriented JavaScript
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Object-Oriented JavaScript

Object-Oriented JavaScript

By : Stoyan STEFANOV
4.5 (48)
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Object-Oriented JavaScript

Object-Oriented JavaScript

4.5 (48)
By: Stoyan STEFANOV
Buy this Book

Overview of this book

The book requires no prior knowledge of JavaScript and works from the ground up to give you a thorough grounding in this powerful language. If you do already know some JavaScript, you will find plenty of eye-openers as you discover just what the language can do. This book takes a do-it-yourself approach when it comes to writing code, because the best way to really learn a programming language is by writing code. You are encouraged to type code into Firebug's console, see how it works and then tweak it and play around with it. There are practice questions at the end of each chapter to help review what you have learned.
Table of Contents (18 chapters)
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Object-Oriented JavaScript
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Object-Oriented JavaScript
Credits
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Credits
About the Author
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About the Author
About the Reviewers
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About the Reviewers
Preface
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Preface
Lock Free Chapter
1
Introduction
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Introduction
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A Bit of History
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The Winds of Change
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The Present
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The Future
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Object-Oriented Programming
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OOP Summary
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Setting up Your Training Environment
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Using the Firebug Console
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Summary
2
Primitive Data Types, Arrays, Loops, and Conditions
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Primitive Data Types, Arrays, Loops, and Conditions
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Variables
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Operators
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Primitive Data Types
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Primitive Data Types Recap
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Arrays
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Conditions and Loops
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Comments
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Summary
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Exercises
3
Functions
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Functions
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What is a Function?
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Pre-defined Functions
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Scope of Variables
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Functions are Data
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Closures
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Summary
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Exercises
4
Objects
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Objects
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From Arrays to Objects
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Built-in Objects
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Summary
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Exercises
5
Prototype
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Prototype
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The prototype Property
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Augmenting Built-in Objects
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Summary
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Exercises
6
Inheritance
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Inheritance
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Prototype Chaining
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Inheriting the Prototype Only
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Uber—Access to the Parent from a Child Object
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Isolating the Inheritance Part into a Function
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Copying Properties
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Heads-up When Copying by Reference
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Objects Inherit from Objects
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Deep Copy
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object()
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Using a Mix of Prototypal Inheritance and Copying Properties
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Multiple Inheritance
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Parasitic Inheritance
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Borrowing a Constructor
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Summary
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Case Study: Drawing Shapes
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Exercises
7
The Browser Environment
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The Browser Environment
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Including JavaScript in an HTML Page
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BOM and DOM—An Overview
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BOM
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DOM
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Events
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XMLHttpRequest
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Summary
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Exercises
8
Coding and Design Patterns
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Coding and Design Patterns
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Coding Patterns
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Design Patterns
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Summary
1
Reserved Words
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Reserved Words
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Keywords
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Future Reserved Words
2
Built-in Functions
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Built-in Functions
3
Built-in Objects
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Built-in Objects
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Object
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Array
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Function
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Boolean
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Number
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String
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Date
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Math
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RegExp
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Error Objects
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Regular Expressions
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Regular Expressions
5
Index
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Index

Array

The Array constructor creates array objects:

>>> var a = new Array(1,2,3);

This is the same as the array literal:

>>> var a = [1,2,3]; //recommended

When you pass only one numeric value to the Array constructor, it's assumed to be the array length. An array with this length will be created, and filled with undefined elements.

>>> var a = new Array(3);
>>> a.length

3 

>>> a

[undefined, undefined, undefined]

This can sometimes lead to some unexpected behavior. For example, the following use of the array literal is valid:

>>> var a = [3.14]
>>> a

[3.14]

However, passing the floating-point number to the Array constructor is an error:

>>> var a = new Array(3.14)

invalid array length

Members of the Array Objects

Property/Method

Description

length

The number of elements in the array. 

>>> [1,2,3,4].length

4

concat(i1, i2, i3,...)

Merges arrays together.

>>> [1...
CONTINUE READING
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Tech Concepts
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Programming languages
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Object-Oriented JavaScript
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