### Natural transformations: mappings between mappings

March 08, 2021 • category theory, TypescriptFunctors relate categories to categories; how do we relate functors to functors?

Written by **Brandon Ling** — physicist now developer.

Functors relate categories to categories; how do we relate functors to functors?

How do the efficiencies of several queue implementations compare?

How can we relate different categories to each other?

You should know about these important categories.

A category is like a bunch of dots and arrows.

Why should I care about category theory?