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.
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