I've had a hard time understanding the difference between composition and aggregation in UML. Can someone please offer me a good compare and contrast between them? I'd also love to learn to recognize the difference between them in code and/or to see a short software/code example.
Edit: Part of the reason why I ask is because of a reverse documentation activity that we're doing at work. We have written the code, but we need to go back and create class diagrams for the code. We'd just like to capture the associations properly.