What is Functional Programming?
Functional programming has become a really hot topic in the JavaScript world. Just a few years ago, few JavaScript programmers even knew what functional programming is, but every large application codebase I’ve seen in the past 3 years makes heavy use of functional programming ideas.
Functional programming (often abbreviated FP) is a programming paradigm where applications are composed using pure functions, avoiding shared mutable state and side-effects. Functional programming is usually more declarative than imperative, meaning that we express what to do rather than how to do it.
Other examples of programming paradigms include object oriented programming, where data and behaviors are colocated, and procedural ...
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