Programming with JavaScript: Algorithms and Applications for Desktop and Mobile Browsers

CHAPTER 3

Data

CHAPTER CONTENTS

3.1 Data Types

3.2 Truth Values

3.3 Numbers

3.3.1 Numeric Operations

3.3.2 Size and Precision Limits

3.3.3 NaN

3.3.4 Hexadecimal Numerals

3.4 Text

3.4.1 Characters, Glyphs, and Character Sets

3.4.2 String Operations

3.5 undefined and null

3.6 Objects

3.6.1 Object Basics

3.6.2 Understanding Object Reference

3.6.3 Object Prototypes

3.6.4 Self-Referential Objects

3.7 Arrays

3.8 Type Conversion

3.8.1 Weak Typing

3.8.2 Explicit Conversion

3.8.3 Loose Equality Operators

3.9 The typeof Operator*

Chapter Summary

Exercises

Introduction

Programs consist of both data and instructions for processing data. Many games, for example, feature players that are moved and drawn. Word processors hold lines of text, which are spellchecked, ...