Just another Nodetraveller

For the last few months I’ve been playing around with different design patterns and methodologies in Javascript. I’ve been looking at the Composite pattern and also Aspects Oriented Programming (AOP). AOP is a way of changing the behaviour of existing code without modifying it. It does this by providing, what AOP calls, advice at certain join points. In plain english, it provides a way of adding additional behaviour (advice) at certain points in your program (join points).

Now Actionscript is OO, I thought it would be useful to try out implementing a design pattern in Flash. The pattern I chose is the Memento pattern, which is mainly used to implement “undo” functionality in applications. The reason I chose Memento is because its a pattern that uses interfaces and I wanted to explore this in AS 2.0. An interface is an object that defines methods but has no implementation.