ActionScript for Flash MX: The Definitive Guide, Second Edition

Object.addProperty Method

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ActionScript Language Reference

valueOf() Retrieve the primitive value of the object, if one exists.

watch() Create a watchpoint to filter property assignment.

Description

The Object class is the base class of the ActionScript object model. Object is used for two

general purposes: as a constructor for creating new, generic objects, and as a superclass

upon which to base new classes. All classes in ActionScript, whether user-defined or built-

in, are descendants of the Object class. All instances of all classes therefore inherit the prop-

erties and methods of Object (though some classes override those properties). However, the

class method Object.registerClass() is accessed directly as a method of the Object class’s

constructor, Object, not through an instance of the class.

To create a generic object of the Object class directly in our code without using a

constructor, we can use an object literal just as we might use a string literal or an array

literal. An object literal is a series of comma-separated property name/value pairs, enclosed

in curly braces. Here’s the general syntax:

{ property1: value1, property2: value2, property3: value3 }

The names of properties in an object literal must be legal identifiers, as described in

Chapter 15. The values can be ...