ActionScript for Flash MX: The Definitive Guide, Second Edition

Object.watch() Method

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ActionScript Language Reference

Returns

The internally defined primitive value of someObject, if a primitive value is associated with

someObject. If no primitive value is associated with someObject, then someObject itself is

returned.

Description

The valueOf() method returns the primitive datum associated with an object, if such an

association exists. This method is most commonly used with instances of the Number,

String, and Boolean classes, which all have associated primitive data. It is rarely necessary

to invoke valueOf() explicitly; it is automatically invoked by the interpreter whenever

someObject is used where a primitive is expected.

See Also

Boolean.valueOf(), MovieClip.valueOf(), Number.valueOf(), Object.toString(),

String.valueOf()

Object.watch() Method

create a watchpoint to moderate property assignment

Flash 6

someObject.watch(prop, callback, userData)

Arguments

prop A string indicating the name of the property to watch on someObject. The

name must adhere to the rules for creating an identifier, outlined under

“Identifiers” in Chapter 15.

callback A function called whenever a value assignment attempt is made on

prop. The

function return value becomes the actual value assigned to the property.

userData An arbitrary data value passed to

callback.

Returns

A Boolean; ...