A Few Practical Notes on Functional Programming

Points Worth Knowing

• Higher-order functions take another function as input or return one — like map and filter.
• Because pure functions have no side effects, they're much easier to test and reason about.
• Many multi-paradigm languages, like JavaScript and Python, let you mix a functional style right alongside OOP.

Takeaway

None of these points are complicated on their own, but knowing them can lead to better technical decisions about Functional Programming on your next project.