In this post, we will see how to resolve Inheritance and Composition problem in class Diagram Question: So there is a small scenario from a big system. It is a Car Booking System where User class needs to be more ...

Question: I’ve been experimenting with uniform labyrinth generation, when I’ve found this problem. So, I’ve got a labyrinth_builder (lab_bui) class which provides the base for any builder algorithm. Then I create uniform_labyrinth_builder (uni_lab_bui) class inherited from lab_bui to provide base ...

Question: I was learning about the Bridge Design pattern. To quote: The Bridge pattern attempts to solve this problem by switching from inheritance to the object composition. … And then, the following image is shown: When people are talking about ...

Question: I have multiple PyQt5 applications with QTableViews that inherit from a subclass “MyTable” of QTableView. In so doing, I am able to maintain the code for a context menu in one place (gen_context_menu) that’s useful to all apps that ...

Question: I’m semi-familiar with Java and came across something in Effective Java(2017) that didn’t make much sense to me. Below is a piece from the book. (item 18) Unlike method invocation, inheritance violates encapsulation. In other words, a subclass depends ...

Question: I am writing an API in Python 3.9. I’ll first provide a simplified example of what I’m working on and below the code will expand a bit on what I’m trying to implement from a design perspective. I just ...

Question: I think we agree that there is a correspondance between composition and delete cascading on one side and aggregation and nullify on delete on the other, in case we delete the whole instance in a whole / part relationship. ...

Question: I have and EditTransaction component and calling it just like this: As you can see, I’m sending a transaction object in it. Since this is an editor, I don’t want the transaction object to be reactive. If somebody closes ...