MACROMEDIA FLEX-FLEX ACTIONSCRIPT LANGUAGE, Reference

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238 Chapter 6: ActionScript Core Classes
}
}
trace(factorial(4)); // output: 24
arguments.caller
Availability
Flash Player 6.
Usage
arguments.caller :Function
Description
Property; refers to the calling function. The value of this property is
null
if the current function
was not called by another function.
Example
The following example defines two functions—a caller function, named function1, which calls a
another function, named function2:
// define the caller function, named function1
var function1:Function = function () {
function2("hello from function1");
}
// define the callee function, named function2
var function2:Function = function (aString:String) {
if (arguments.caller == function1) {
trace("function2 was called by function1");
trace(aString);
}
}
// call function1
function1();
/*
Output:
function2 was called by function1
hello from function1
*/
arguments.length
Availability
Flash Player 5.
Usage
arguments.length :Number