Core JavaScript 1.5 Guide

From MDC

Contents 1 About this Guide 2 JavaScript Overview 3 Core Language Features 4 Expressions and Operators 5 Regular Expressions 6 Statements 7 Functions 8 Working with Objects 9 Working with Arrays 10 Iterators and Generators 11 Details of the Object Model 12 LiveConnect Overview 13 Processing XML with E4X

[edit] About this Guide

New features in JavaScript versions

What you should already know

JavaScript versions

Where to find JavaScript information

Tips for learning JavaScript

Document conventions

[edit] JavaScript Overview

What is JavaScript?

JavaScript and Java

JavaScript and the ECMAScript Specification

Relationship between JavaScript Versions and ECMAScript Editions

JavaScript Documentation versus the ECMAScript Specification

JavaScript and ECMAScript Terminology

[edit] Core Language Features

Values

Data Type Conversion

Variables

Declaring Variables

Evaluating Variables

Variable Scope

Global Variables

Constants

Literals

Array Literals

Boolean Literals

Floating-Point Literals

Integers

Object Literals

String Literals

Unicode

Unicode Compatibility with ASCII and ISO

Unicode Escape Sequences

Unicode characters in JavaScript files

Displaying Characters with Unicode

[edit] Expressions and Operators

Expressions

Operators

Assignment Operators

Comparison Operators

Arithmetic Operators

Bitwise Operators

Logical Operators

String Operators

Special Operators

Operator Precedence

[edit] Regular Expressions

Creating a Regular Expression

Writing a Regular Expression Pattern

Using Simple Patterns

Using Special Characters

Using Parentheses

Working with Regular Expressions

Using Parenthesized Substring Matches

Executing a Global Search, Ignoring Case, and Considering Multiline Input

Examples

[edit] Statements

Block Statement

Conditional Statements

if...else Statement

switch Statement

Loop Statements

for Statement

do...while Statement

while Statement

label Statement

break Statement

continue Statement

Object Manipulation Statements

for...in Statement

with Statement

Comments

Exception Handling Statements

throw Statement

try...catch Statement

[edit] Functions

Defining Functions

Calling Functions

Using the arguments Object

Predefined Functions

eval Function

isFinite Function

isNaN Function

parseInt and parseFloat Functions

Number and String Functions

escape and unescape Functions

Working with Closures

[edit] Working with Objects

Objects and Properties

Creating New Objects

Using Object Initializers

Using a Constructor Function

Indexing Object Properties

Defining Properties for an Object Type

Defining Methods

Using this for Object References

Defining Getters and Setters

Deleting Properties

Predefined Core Objects

Array Object

Boolean Object

Date Object

Function Object

Math Object

Number Object

RegExp Object

String Object

Inheritance

[edit] Working with Arrays

Creating an array

Working with array elements

Understanding length

Iterating over arrays

Array methods

Working with Array-like objects

Two-Dimensional Arrays

Array comprehensions

[edit] Iterators and Generators

Iterators

Defining custom iterators

Generators: a better way to build Iterators

Advanced generators

Generator expressions

[edit] Details of the Object Model

Class-Based vs. Prototype-Based Languages

Defining a Class

Subclasses and Inheritance

Adding and Removing Properties

Summary of Differences

The Employee Example

Creating the Hierarchy

Object Properties

Inheriting Properties

Adding Properties

More Flexible Constructors

Property Inheritance Revisited

Local versus Inherited Values

Determining Instance Relationships

Global Information in Constructors

No Multiple Inheritance

[edit] LiveConnect Overview

Working with Wrappers

JavaScript to Java Communication

The Packages Object

Working with Java Arrays

Package and Class References

Arguments of Type char

Handling Java Exceptions in JavaScript

Java to JavaScript Communication

Using the LiveConnect Classes

Data Type Conversions

JavaScript to Java Conversions

Java to JavaScript Conversions

[edit] Processing XML with E4X

Compatibility issues

Creating an XML object

Working with attributes

Working with XML objects

Working with XMLLists

Searching and filtering

Handling namespaces