Going further than polymorphism - demonstrating value objects, type-driven design, and MIRO principles Introduction Martin Fowler's Theatrical Players example from Chapter 1 of "Refactoring" (2nd Edition) is a masterclass in basic refactoring techniques. He demonstrates: * Extract Method * Split Phase * Replace Conditional with Polymorphism * Move Method These
The Tennis Refactoring Kata has been solved thousands of times. Most solutions look the same: extract a few methods, add some constants, maybe introduce an enum for scores. The tests pass, the code looks cleaner, and everyone moves on. But something profound is being missed. The Tennis Kata isn'
The Challenge The Gilded Rose Refactoring Kata is famous for its nested conditional nightmare. Everyone focuses on eliminating the if statements. But what if the kata is teaching something deeper? What if it's a perfect sandbox for practicing four fundamental complexity management patterns? The Four Patterns 1. Boolean
The Setup The Gilded Rose Refactoring Kata by Terry Hughes and Emily Bache is one of the most popular refactoring exercises. It presents messy, nested conditional code that needs cleaning up. Everyone focuses on eliminating the nested if statements. And that's good! But they all miss something deeper.
For years, developers have debated the minutiae of clean code. Should methods be five lines or fifteen? What makes a good variable name…