Hacker News on 2 October 2019

• Ask HN: Who Wants to Be Fired?
• Iraq blocks Facebook, Twitter, WhatsApp, and Instagram, shuts down internet
• New In Postgres 12: Generated Columns
• Show HN: Ledonardo, my light painting hardware project
• No evidence that testosterone reduces cognitive empathy
• How a double-free bug in WhatsApp turns to remote code execution
• Ocean plastic waste probably comes from ships, report says
• Microsoft introduces Windows 10 X for dual-screen devices
• Y Combinator Top Companies List 2019
• Do you have a problem? Write a compiler