yeahdef Karma 160 Created 9 years ago Recent Submissions 1. ▲ What's the deal with visible QR codes appearing on digital ads? (imgur.com) 1 point · 2 years ago · 8 comments 2. ▲ Extracting Super Mario Bros levels with Python (matthewearl.github.io) 166 points · 7 years ago · 19 comments All submissions on HN · View profile on HN