MACROMEDIA FLASH MX 2004 - ACTIONSCRIPT, Reference Manual

Page: 574 / 816

574 Chapter 12: ActionScript Dictionary
Description
Function; converts the parameter
expression
to a number and returns a value as follows:
•
If
expression
is a number, the return value is
expression
.
•
If
expression
is a Boolean value, the return value is 1 if
expression
is
true
, 0 if
expression
is
false
.
•
If
expression
is a string, the function attempts to parse
expression
as a decimal number
with an optional trailing exponent, that is, 1.57505e-3.
•
If
expression
is
undefined
, the return value is as follows:
■
In files published for Flash Player 6 or earlier, the result is 0.
■
In files published for Flash Player 7 or later, the result is
NaN
.
This function is used to convert Flash 4 files containing deprecated operators that are
imported into the Flash 5 or later authoring environment. For more information, see
& (bitwise
AND operator)
.
See also
NaN
, Number class
Object class
Availability
Flash Player 5 (became a native object in Flash Player 6, which improved
performance significantly).
Description
The Object class is at the root of the ActionScript class hierarchy. This class contains a small
subset of the features provided by the JavaScript Object class.
Method summary for the Object class
Property summary for the Object class
Method Description
Object.addProperty()
Creates a getter/setter property on an object.
Object.registerClass()
Associates a movie clip symbol with an ActionScript object class.
Object.toString()
Converts the specified object to a string and returns it.
Object.unwatch()
Removes the watchpoint that
Object.watch()
created.
Object.valueOf()
Returns the primitive value of an object.
Object.watch()
Registers an event handler to be invoked when a specified property of an
ActionScript object changes.
Property Description
Object.__proto__
A reference to the
prototype
property of the object’s constructor
function.