Is the FP Juice worth the Squeeze?

"Knowing I ought to spend more time seriously researching things that matter in my career and having the discipline to do so amid life's distractions are two different things. Writing this blog is one way I am keeping my promise to myself."

"There are things we know we should do, things our customers wish we would do faster, and things that would be exciting to do now. They are rarely the same and they often compete against each other for attention and so we must prioritize."

"For this context, I'm not using FP to mean monads, category theory, or a rewrite into a purely functional language. I'm using it to mean a handful of disciplines that change where complexity lives: Prefer immutability so facts don't drift after they're recorded. Represent absence explicitly instead of letting null smuggle ambiguity through the system. Represent failures explicitly instead of letting exceptions and side-effects hide."

A software professional evaluates whether adopting functional programming principles justifies the transition cost for a Java-based digital commerce company. Rather than pursuing pure functional languages or advanced concepts like monads, the focus centers on practical disciplines: preferring immutability to prevent data drift, explicitly representing absence instead of using null, and explicitly handling failures rather than relying on exceptions and side effects. The evaluation considers material business factors including documentation, QA, team dynamics, operational predictability, and customer trust. The goal is determining whether these functional programming practices sufficiently reduce enterprise risk and improve delivery predictability to warrant adoption costs while surviving the complexities of real-world digital commerce operations.

Read at Medium