But it is a good tool to have.
Many students learn at the university the principles of object-oriented programming, and they are told that object-oriented is one of the crucial crystals of knowledge that they need to possess in order to find a good job in the industry, they graduate from the university thinking that object-oriented is the best paradigm there is and they should apply it everywhere, many of them don’t know that object-oriented isn’t perfect and has its weaknesses, here we are going to review some of them.
Object-Oriented Programming
Object-oriented programming focuses at modeling the world by objects, objects are models for entities that represent what are…
Command & Query separation in the world of object-oriented.
What is CQS/CQRS (Command & Query Separation)?
First, let’s agree that each method of a class can do one or both things:
- It can mutate a private value of the class (hence you tell the object to mutate it, therefore it is also called a “Command”).
- It can return an object/value as a result or additional data (hence you want to query the object to tell you something).
Let’s see some examples (TypeScript):
Don’t worry about the long class, you can instantly skip to the methods explanation right beneath it.
Let’s look at methods by category:
Command:
You can see…
Neyney
Lifelong learner…
