Implementing OCP in OOP

In this lesson, we’ll see how OCP helps us write code that we can add new features to, without changing the code itself. This does sound like an impossibility at first, but it flows naturally from DIP combined with LSP.

Keeping code open for growth, closed for tweaks

OCP results in code that is open to extension but closed to modification. We saw this idea at work when we looked at DIP. Let’s review the code refactoring we did in the light of OCP.