Hacker News on 19 December 2016

• Building Jarvis
• Bootstrapping a SaaS Startup from Scratch
• Skip Lists Done Right
• So you want to expose Go on the Internet
• Backpropagation is a leaky abstraction
• One Way to Improve Your Coding
• The Crystal Programming Language
• Cancelable Promises: Why was this proposal withdrawn?
• Beware of Developers Who Do Negative Work
• Wycheproof – Tests that check cryptographic software for known weaknesses