A smart candidate will bring a notebook computer, loaded with suitable IDEs etc ready to go, without being asked to. Impresses people when you tell them to continue the interview while you write the requested code (multitasking, competent enough to spare nontrivial brain cycles answering unrelated questions).
Will some of those with opinions of this suggestion describe those opinions, so that I can better evaluate whether or not it's actually worth considering? Thanks!
However, I don't think bringing your notebook to show off some of your work is a bad idea.
Downvotes? Meh. Taking a notebook and writing the solution with sensible tools - while fielding unrelated questions from 4 interviewers - got me an offer.
Why the downvotes?