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 with arrays Although JavaScript’s arrays are very capable out of the box, the functional paradigm improves the clarity and maintainability of array code.

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 ...