Which pattern is in most of the 22 rounds

transcript

22 case studies, and a table of which patterns each one uses. So which pattern shows up in the most rounds?

Strategy is in 17 of the 22 rounds. By far the most. Observer is in 10. State is in 9.

But Observer is built in only five of those ten. In the other five, it's a follow-up or a light callback.

State is in nine rounds. Only the vending machine builds the full pattern. The others keep it small. Ride sharing and food delivery use a table. The rest use an enum.

Concurrency patterns are in ten rounds too, and all ten build one. Seven rounds build composition and value objects. Facade is in six. Every count comes from one program, run in four languages.

Chess, the ATM, the file system, the editor, and the order book. Each one varies in a different way. The map follows the prompt, not a template.

Full breakdown in the lecture.