If you write JavaScript, you have probably used higher-order functions and not even noticed. If you have ever replaced a for loop with an array method, you’ve used higher-order functions.

This tutorial explains what is different and special about a functional programmer's approach, and demonstrates how to implement JavaScript functions from a functional programming point of view. It ...

Functional programming relies on pure functions and avoids shared state and mutable data. It’s a programming style that rose to prominence with languages like Clojure, Scala, and Elm, but you ...