I started off a recent project in Java (heavy use of RxJava). Over time it migrated to a largely Kotlin codebase, which lends itself well to either OOP or funct

I started off a recent project in Java (heavy use of RxJava). Over time it migrated to a largely Kotlin codebase, which lends itself well to either OOP or functional. I realized, so many of my method calls on my objects were only ever used once. Sometimes I'd create a class which just had one method. I had to assign a good name to this class, and it's method. I've since switched to heavy use of extension methods in Kotlin, and found I was mocking less for many tests, and writing less code that accomplished more. And variable naming was simpler. At the end of the day, a good blend of OOP and functional programming are where it's at