JavaScript Tutorials - Herong's Tutorial Examples - 2.33, by Herong Yang
The "Array" Object Type - Arrays Are Objects
This section provides a quick description and a tutorial example script on the 'Array' built-in object type, which is used to create arrays.
The "Array" object type is a special built-in object type to be used to create new arrays. It has the following main features:
Here is a tutorial example script showing some of those features:
// Array_Object_Type.js // Copyright (c) 2013 HerongYang.com. All Rights Reserved. // Creating a new array var colors = new Array("Red", "Green", "Blue"); // Checking this object println("\nAbout this \"colors\":"); println(" Type = "+(typeof colors)); println(" Instance Of Object: "+(colors instanceof Object)); println(" Instance Of Array: "+(colors instanceof Array)); println("\nList of array properties:"); for (item in colors) { println(" "+item+" = "+colors[item]); } // Using array's inherited property and method colors.push("Yellow"); colors.sort(); // Accessing elements through indexes println("\nAfter push() and sort():"); for (var i=0; i<colors.length; i++) { println(" "+i+" = "+colors[i]); }
If you run this script with "jrunscript", you will get:
About this "colors": Type = object Instance Of Object: true Instance Of Array: true List of array properties: 0 = Red 1 = Green 2 = Blue After push() and sort(): 0 = Blue 1 = Green 2 = Red 3 = Yellow
Now we know how to create arrays with the "Array()" constructor.
Read other "Array" related chapters to see more tutorial examples.
Table of Contents
ECMAScript Language Specification and JavaScript Dialects
Data Types, Variables and Expressions
Creating, Accessing, and Manipulating Arrays
Defining and Calling Functions
Web Browser Supporting JavaScript
Server-Side and Client-Side Web Scripting
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
Overview of Built-in Object Types
The "Object" Object Type - The Root Object Type
The "Global" Object Type - The Invisible Global Container
Global Properties and Functions Defined in ECMAScript
Global Properties and Functions Provided by "jrunscript"
The "Function" Object Type - Functions Are Objects
►The "Array" Object Type - Arrays Are Objects
The "JSON" Object Type - parse() and stringify()
The "String" Object Type - Not Equal to String Primitive Type
The "Boolean" Object Type - Wrapping Boolean Values into Objects
The "Number" Object Type - Not Equal to Number Primitive Type
The "Date" Object Type - Managing Dates and Times
The "RegExp" Object Type - Regular Expression Patterns
The "Error" Object Type - Runtime Exceptions
The "Math" Object Type - The Math Container
W3C's Document Object Model (DOM) Specifications