Hacker News on 9 January 2019

• Show HN: I taught my little brother JS, and he made this videogame in a week
• Penguin travels every year to visit man who rescued him (2016)
• Samsung Phone Users Perturbed to Find They Can't Delete Facebook
• Amazon DocumentDB, with MongoDB compatibility
• Hexyl: A command-line hex viewer
• Show HN: Top PDFs Posted to Hacker News in 2018
• Show HN: A tool to find related subreddits
• The Painful Price of Becoming Jackie Chan
• The State of Software Security in 2019
• Matz: We are mere mortals