In my last Functional JS article, we went over recursive patterns that allow you to operate/iterate over array values. This time, we’re going to get a bit more abstract to hopefully explain some of the bare fundamentals of functional programming.

A moment on Currying

You’ll notice that we never define a function with more than 1 argument. We return a new function for every additional argument needed. This is a technique used very commonly in functional programming that has its roots in Lambda Calculus. This has multiple benefits, but is used mainly to simplify partial application of functions.