Hacker News on 28 December 2015

• Introducing d3-scale
• Free Springer math books
• Stupid Patent of the Month: Microsoft’s Design Patent on a Slider
• 191M US Voters’ Personal Info Exposed by Misconfigured Database
• How I Created a $350M Software Company Knowing Nothing About Software
• China passes law requiring tech firms to hand over encryption keys
• Judge: Drinking tea, shopping at garden store probable cause for SWAT raid
• When slaves and free men were shipwrecked together
• AVG: “Web TuneUP” extension multiple critical vulnerabilities
• Mysterious Android codebase commit