Hacker News on 26 December 2019

• Takeaways from coaching CEOs, founders and VCs
• OnlyKey: Open-Source Alternative to YubiKey
• Show HN: Eschersket.ch – a symmetry drawing app to design custom wrapping paper
• I love coding in C
• Dropbox Transfer
• Effects of Intermittent Fasting on Health, Aging, and Disease [pdf]
• Kaboom: an unusual Minesweeper
• 88% of Americans use a second screen while watching TV
• I only use an iFrame to crawl and scrape content
• Nim vs. Crystal