After my last article on map, filter, and reduce there was an outpour of requests to do an article on just reduce. This time let’s dive into all the fun things you can do with reduce.

In this article we'll go back to basics and cover three of the most important functions in functional programming, map, filter, and reduce.

Originally I set out to write a sequel to Functional Programming Fundamentals that covered all of the scary jargon. This quickly evolved into What the Functor? In that article I covered monads, monoids, and functors. Now we have one last bit of scary functional jargon, lambdas.

A monad is just a monoid in the category of endofunctors, what's the problem? Hopefully, you'll understand this when we're done.

In this post, we’ll discuss the fundamentals of Functional Programming and how they apply to modern JavaScript. We’ll also avoid unnecessary jargon like monads and functors and stick to concepts that will make our code better.