Brief intro to functional programming in JS [🌳]
Functional programming (often abbreviated FP) is the process of building software by composing pure functions, avoiding shared state, mutable data, and side-effects. Functional programming is declarative rather than imperative, and application state flows through pure functions. Contrast with object oriented programming, where application state is usually shared and colocated with methods in objects.
Functional code tends to be more concise, more predictable, and easier to test than imperative or object oriented code — but if you're unfamiliar with it and the common patterns associated with it, functional code can also seem a lot more dense, and the related literature can be impenetrable to newcomers.
If you start googling functional programming terms, you're going to quickly hit a brick wall of academic lingo that can be very intimidating for beginners.
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