Hacker News on 21 November 2015

• What is a coder's worst nightmare? (2014)
• Webtorrent – BitTorrent over WebRTC
• How a little bit of TCP knowledge is essential
• I believed we would face an antibiotics apocalypse, until now
• React vs. Angular 2
• Covariance and Contravariance
• Non-photo blue
• What I’ve learned from sitting next to a pro salesman
• YArchive
• New derivation of pi links quantum physics and pure math