Eugene Obrezkov made it really cool: 4 languages, 50 solved challenges (at the moment of writing), the detailed Russian explanation on Telegram (<a href="https://t.me/wild_wild_web" rel="nofollow">https://t.me/wild_wild_web</a>)<p>I really like that there are resources like that. It improves the TypeScript knowledge and make people dig into details
These problems and solutions are quite well put together, and I haven’t seen another resource like it. There’s a ton out there about writing Typescript, but not nearly as much about writing types, especially higher order types.