In functional programming, this is a big no-no. Mutations are considered a nasty side-effect that should be avoided. The issues that arise from mutation typically have to do with assumptions about ...

JavaScript arrays are an incredibly flexible way to model collections using techniques from functional programming. This article introduces you to using tools like forEach(), map(), and reduce ...

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 ...