As I mentioned in the first post of this series, you’re often going to hear about The Three Pillars of Object-Oriented Programming. You may also hear about The Four Pillars of Object-Oriented Programming.
And it’s not that there’s a total of seven or anything like that. Instead, it’s more about what people consider to be foundational to OOP: Are there three or four major concepts?
You can surmise from the previous article (let alone the title), I believe there are four.
And in this post, I’m going to cover the final two:
- and Polymorphism
If you’ve done any type of object-oriented programming prior to reading this article, you’ve likely heard of at least one of these.
Regardless, let’s take a look at each of them in more detail.
Two More Pillars of OOP
Before jumping into each of these, I want to be sure that you’re caught up in what we’ve covered so far.
A Word About Analysis
I won’t belabor the point, but the whole reason I’m now talking about object-oriented fundamentals is because we’re moving into a different phase of this material. We started off covering the Analysis phase which included:
- Analysis, Part 1
- Analysis, Part 2
- Understanding Customer Expectations
- Statement of Work
- Terms and Conditions
Now To Development
And now we’re on to the development phase. Some may call it fundamentals (but I content you can’t do good development without the fundamentals so there’s that(.
If you’ve not read the previous post, I recommend doing so before continuing as it covers the concepts of Abstraction, Encapsulation, and how it relates to WordPress.