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Don’t repeat yourself. Don’t use magic numbers in your code. As experienced developers, we’ve all heard advice like this. We have decent intuition for “good” code. After watching Jimmy’s Strange Loop presentation and his explanation of citrus advice, I realized that much of the software design tips available have some truth embedded in them, but are imprecise. There are deeper truths for those who want to find them.

Jimmy created a set of principles that we can use to build better software. From his principles, advice like those above can be derived and understood. The course is challenging, but Jimmy will go out of his way to make sure you grasp the material. After the first week of the course, I noticed improvements in my code. By the middle of the course, I was more aware of all the decisions I was making when writing code, and I started changing some of my old habits.

I particularly enjoyed the refactoring exercises and one-on-one coaching sessions. If you are committed to improving your software design skills, work with Jimmy.