MACROMEDIA FLEX-FLEX ACTIONSCRIPT LANGUAGE Reference page 387

Example
The following example shows the return value of valueOf() for a generic object (which does not
have a primitive value) and compares it to the return value of toString():
// Create a generic object
var myObject:Object = new Object();
trace(myObject.valueOf()); // output: [object Object]
trace(myObject.toString()); // output: [object Object]
The following examples show the return values for the built-in classes Date and Array, and
compares them to the return values of
// Create a new Date object set to February 1, 2004, 8:15 AM
// The toString() method returns the current time in human-readable form
// The valueOf() method returns the primitive value in milliseconds
var myDate:Date = new Date(2004,01,01,8,15);
trace(myDate.toString()); // output: Sun Feb 1 08:15:00 GMT-0800 2004
trace(myDate.valueOf()); // output: 1075652100000
// Create a new Array object containing two simple elements
// In this case both toString() and valueOf() return the same value: one,two
var myArray:Array = new Array("one", "two");
trace(myArray.toString()); // output: one,two
trace(myArray.valueOf()); // output: one,two
See the example for
Object.valueOf()
Object.watch()
Availability
Flash Player 6.
Usage
myObject.watch( prop:String, callback:Function [, userData:Object] ) : Boolean
Parameters
A string; the name of the object property to watch.
prop
The function to invoke when the watched property changes. This parameter is a
callback
function object, not a function name as a string. The form of
oldVal, newVal, userData)
An arbitrary piece of ActionScript data that is passed to the
userData
the parameter is omitted,
userData
is optional.
Returns
A Boolean value:
Object.toString()
Object.toString()
for a custom class that overrides
.
undefined
if the watchpoint is created successfully,
true
:
for an example of the return value of
toString()
callback
is passed to the callback method. This parameter
.
is
callback(prop,
method. If
callback
otherwise.
false
Object.watch() 387