rvwaveren Karma 40 Created 13 years ago Recent Submissions 1. ▲ Why Duolingo is free (2011) (ted.com) 2 points · 8 years ago · 0 comments 2. ▲ Finding a Ruby memory leak using time analysis (gist.github.com) 45 points · 10 years ago · 0 comments All submissions on HN · View profile on HN