JavaScript Tutorials - Herong's Tutorial Examples
Dr. Herong Yang, Version 2.20

JavaScript Tutorials - Herong's Tutorial Examples

∟Creating, Accessing, and Manipulating Arrays

∟Creating an Array Object

This section provides a tutorial example on how to create array objects in JavaScript.

There are 3 ways to create a new array object:

1. Using the array literal - A new array object can be created by using the array literal syntax of [exp1, exp2, ...]. For example: 

   var colors = ["Red", "Green", "Blue"];
   var account = ["Saving", 999.99, true];

2. Calling the array constructor - A new array object can be created by calling the array constructor of (new Array(exp1, exp, ...)). For example: 

   var colors = new Array("Red", "Green", "Blue");
   var account = new Array("Saving", 999.99, true);

3. Calling the array function - A new array object can be created by calling the array function of (array(exp1, exp, ...)). For example: 

   var colors = Array("Red", "Green", "Blue");
   var account = Array("Saving", 999.99, true);

Here is a tutorial example JavaScript that shows you how to create new array objects: 

<html>
<!-- Create_Arrays.html
   Copyright (c) 2008 by Dr. Herong Yang, http://www.herongyang.com/
-->
<head><title>Create Arrays</title></head>
<body>
<pre>
<script type="text/javascript">

   // Using array literal
   var my_saving = ["Saving", 999.99, true];

   // Using array constructor
   var my_checking = new Array("Checking", 9.99, true);

   // Using array function
   var my_stock = Array("Stock", 99999.99, true);

   // Creating an empty array
   var new_account = [];

   document.write(my_checking[0]+": "+my_checking[1]+"\n");
   document.write(my_saving[0]+": "+my_saving[1]+"\n");
   document.write(my_stock[0]+": "+my_stock[1]+"\n");
   document.write(new_account[0]+": "+new_account[1]+"\n");
</script>
</pre>
</body>
</html>

The output of this sample JavaScript is: 

Checking: 9.99
Saving: 999.99
Stock: 99999.99
undefined: undefined

Table of Contents

 About This JavaScript Tutorial Example Book

 Introduction to JavaScript

 ECMAScript Language Specification and JavaScript Dialects

 Data Types, Variables and Expressions

 Flow Control Statements

►Creating, Accessing, and Manipulating Arrays

 What Is an Array?

►Creating an Array Object

 Accessing Array Elements with Indexes

 Truncating and Iterating Array Elements

 Array Object Instance Methods

 Array Object Instance Method Examples

 Defining and Calling Functions

 Web Browser Supporting JavaScript

 Server-Side and Client-Side Web Scripting

 Introduction to Objects

 Defining Your Own Object Types

 Inheritance of Properties and Methods through the Prototype Object Chain

 'jrunscript' - JavaScript Shell Command from JDK

 Using Functions as "Function" Objects

 Introduction to Built-in Object Types

 W3C's Document Object Model (DOM) Specifications

 References

 PDF Printing Version

Dr. Herong Yang, updated in 2008
Creating an Array Object