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Object-Oriented JavaScript - Second Edition

You're reading from   Object-Oriented JavaScript - Second Edition If you've limited or no experience with JavaScript, this book will put you on the road to being an expert. A wonderfully compiled introduction to objects in JavaScript, it teaches through examples and practical play.

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Product type Paperback
Published in Jul 2013
Publisher Packt
ISBN-13 9781849693127
Length 382 pages
Edition 2nd Edition
Languages
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Toc

Table of Contents (14) Chapters Close

Preface 1. Object-oriented JavaScript FREE CHAPTER 2. Primitive Data Types, Arrays, Loops, and Conditions 3. Functions 4. Objects 5. Prototype 6. Inheritance 7. The Browser Environment 8. Coding and Design Patterns A. Reserved Words B. Built-in Functions
C. Built-in Objects D. Regular Expressions
Index

Summary

In Chapter 2, Primitive Data Types, Arrays, Loops, and Conditions, you saw that there are five primitive data types (number, string, Boolean, null, and undefined) and we also said that everything that is not a primitive piece of data is an object. Now you also know that:

  • Objects are like arrays, but you specify the keys.
  • Objects contain properties.
  • Properties can be functions (functions are data; remember var f = function () {};). Properties that are functions are also called methods.
  • Arrays are actually objects with predefined numeric properties and an auto-incrementing length property.
  • Array objects have a number of convenient methods (such as sort() or slice()).
  • Functions are also objects and they have properties (such as length and prototype) and methods (such as call() and apply()).

Regarding the five primitive data types, apart from undefined and null, the other three have the corresponding constructor functions: Number(), String(), and Boolean(). Using these, you can create objects...

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