Functional programming, as the name implies, is about functions. While functions are part of just about every programming paradigm, including JavaScript, a functional programmer has unique ...

All products featured here are independently selected by our editors and writers. If you buy something through links on our site, Mashable may earn an affiliate commission.

Pure functions are basic coding building blocks within a program. A pure function is predictable, adaptable, and produce no side effects. Impure functions have the ability to mutate a property or ...