ActionScript Functions
In ActionScript, a Function is first-class object.
The Function class is in the "top-level" package.
You can pass a function as an argument to another function, and then call the passed function.
public function callOtherFunction( otherFunction:Function ):void { // call the passed in function otherFunction(); // or otherFunction.call(); }
Get and Set Functions
Learn more about Get and Set Functions (also known as accessors)...
Functions as Arguments...
The nearly omni-present addEventListener()...
Closures
A closure is an object that represents a snapshot of a function with its lexical context (variable's values, objects in the scope). A function closure can be passed as an argument and executed without being a part of any object.
TODO...
Functions vs. Methods
Methods of a class are slightly different than Function objects. Unlike an ordinary function object, a method is tightly linked to its associated class object. Therefore, a method or property has a definition that is shared among all instances of the same class. Methods can be extracted from an instance and treated as "bound" methods (retaining the link to the original instance). For a bound method, the this keyword points to the original object that implemented the method. For a function, this points to the associated object at the time the function is invoked.