[nnq]

Well, if they didn't bother to check what language/technology you were using and they didn't give you any requirements, you did the right thing.

Any competent manager should lay technology requirements/guidelines before starting any projects and maybe even keep an eye on the codebase if he/she has any coding skills... You happened to work for incompetent people, and you just taught them a lesson about their own incompetence. Thumbs up!