[FLEX] What is dynamic keyword used for? or What is the difference between sealed class and dynamic classes?
Dynamic Keyword is used to make a class dynamic. A dynamic class defines an object that can be altered at run time by adding or changing properties and methods. We create dynamic classes by using the dynamic attribute when we declare a class. For example, the following code creates a dynamic class named Protean: dynamic class Protean { private var privateGreeting:String = "hi"; public var publicGreeting:String = "hello"; function Protean () { trace("Protean instance created"); } } If we subsequently instantiate an instance of the Protean class, we can add properties or methods to it outside the class definition. For example, the following code creates an instance of the Protean class and adds a property named aString and a property named aNumber to the instance: var myProtean:Protean = new Protean(); myProtean.aString = "testing"; myProtean.aNumber = 3; trace (myProtean.aString, myProtean.aNumber); // output: testing 3 Prop