It's obvious that most design patterns haven't been used in practice. They explain a forced situation for about 10 minutes and then move on to implementation. In particular, comparing design patterns to games is the worst of the worst. I didn't do it, so it didn't make sense to me at all. Also, if you've learned a pattern, you should know when to use it. You can just copy and paste the implementation. You should be able to know what situation you're in and what to Google. I haven't gained anything by comparing it to before and after listening to this. The explanation is really bad. At least they don't know how to teach design patterns. It's definitely not 70,000 won quality. Reading Head First is 100 times better from an educational or economic perspective. Despite that, I'm surprised that the average Inflearn review is close to 5 points. I'm not sure if those people really learned it or if they thought they learned it. In reality, all you get is a lecture that only formally knows the names of the patterns. It's a waste of money, sigh