Six rounds that cover every pattern

transcript

You can't read all 22 case studies. You have time for six. That is a real situation before an interview. Which six meet the most patterns?

Pick the round that adds the most patterns you haven't met. Add them to the covered set. Then ask: is everything covered? If not, pick again. Ties go to the lower round.

The pub-sub logger first. It builds six patterns at once. Then movie booking and chess, three each. Then the parking lot, two. Each adds patterns the logger didn't.

The text editor adds Composite and Memento. Memento is the editor's snapshot. The key-value store adds Proxy. Six rounds, all 17 built patterns.

With time for all 22, read them in course order. With time for six, take the route. It meets every built pattern soonest.

It counts patterns, not difficulty. The logger is a hard round. Read the other sixteen afterwards, in course order.

Full breakdown in the lecture.