Hacker News on 30 July 2019

• Math Basics for Computer Science and Machine Learning [pdf]
• Employee happiness and business success are linked
• Blender 2.80
• BootOS: Monolithic operating system in 512 bytes of x86 machine code
• Capital One’s breach was inevitable, because we did nothing after Equifax
• Google reveals fistful of flaws in Apple's iMessage app
• What’s New in ES2019
• Ethiopia Plants 350M Trees in One Day to Combat Drought and Climate Change
• Tracking Sex: Implications of widespread data leakage and tracking on porn sites
• A Look at Overnight Stays at US National Parks