Anonther West London Hack Night, and another success I'd say. We picked a tough one this time: Write an interpreter and a virtual machine in 90 minutes. That challenge was made both easier and harder by the choice of language: Brainfuck. It's got a very simple specification, but the language is so hard to read that debugging the interpreter becomes a real brain...ache.
By my count we mustered 20 people spread across 7 teams. Not everyone managed to finish, but here are the projects that got published:
Not a bad result at all - almost everyone went home able to say they'd implemented a Turing Complete programming language from scratch...