Functional vs.? Object Oriented Programming

On the difference between functional and object oriented programming, how they’re actually the same thing and why you should use both.

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THE CURRENT VERSION OF THIS ARTICLE IS PUBLISHED HERE.

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Tags: #FYI++

This article is part of the Kotlin Primer, an opinionated guide to the Kotlin language, which is indented to help facilitate Kotlin adoption inside Java-centric organizations. It was originally written as an organizational learning resource for Etnetera a.s. and I would like to express my sincere gratitude for their support.

It is recommended to read the Introduction before moving on. Check out the Table of Contents for all articles.

In the following articles, I want to go through the typical (and not so typical) functions which are used to transform collections — map, filter, groupBy etc. Often, I have been confronted with the view that using these functions amounts to functional programming. I’m not sure I agree with that view, similar to how I’m not sure I would agree that changing tires…