Running Doom in TypeScript with Dimitri Mitropoulos

Doom has seemingly been ported to every electronic device imaginable, including picture frames, lamps, and coffee machines. The meme of it runs doom has become so widespread that it spawned the r slash it runs doom subreddit. Recently, Doom made headlines again for being ported to TypeScript. The project involved representing Doom entirely in TypeScript, three and a half trillion lines of types, 90 gigabytes of RAM to run, and a full year to complete. Dimitri Mitropoulos is the engineer who carried out this heroic feat. He's also a developer at Vercel, the founder of Michigan TypeScript and a cofounder of SquiggleConf. Dimitri joins the podcast with Josh Goldberg to talk about what it took to pull off one of the most mind bending TypeScript projects to date. This episode is hosted by Josh Goldberg, an independent full time open source developer. Josh works on projects in the TypeScript ecosystem, most notably TypeScript ESLint, a powerful static analysis toolset for JavaScript and TypeScript. He is also the author of The O'Reilly Learning TypeScript Book, a Microsoft MVP for developer technologies and a cofounder of SquiggleConf, a conference for excellent web developer tooling. Find Josh on Blue Sky, Fostodon, and .com as Joshua k Goldberg. With me today is Dimitri Metropolis, founder of Michigan TypeScript, cofounder of School Conf, and an all around interesting TypeScript individual. Dimitri, welcome to Software Engineering Daily. Hi. Thanks for having me. Excited to have you on, Dimitri. Just to start off, can you tell us how did you get into coding? Oh, I love it. Right with the deep questions. I've been programming since I was very young. I had my first email address when I was six, which I think even for these days is kind of cutting edge, but I don't think anyone really knew what the Internet was back then. I remember running to school and telling my friends, there's this website called Ask Jeeves, and you can just type in a question. It will give you the answer. It's so cool. Just go ask Jeeves, and it's like a butler there. My mom was in real estate, and I watched her do they weren't Excel. I think it was QuarkXPress formulas, and I think that was my first real I hope that's the name of the spreadsheet. It was some kinda, like, off brand Excel spreadsheet for technology. And I saw her writing formulas, and it was so interesting to me. And I think that was, like, the first exposure that I had to software engineering. And through my life, I did more and more stuff like that. I got interested in video games, and that interest propelled me to become interested in technology. I started building computers when I was, like, maybe nine or 10 to play, I don't know, Quake three Arena, or I'm not sure exactly. I don't remember all the games, DOS games in some cases. And that propelled me into high school where I started doing …