Hacker News on 27 May 2017

• View Counting at Reddit
• A Year of Google and Apple Maps
• Too many prisons make people worse
• Blockchains from the ground up: Part 1
• How Bayesian Inference Works (2016)
• AlphaGo's next move
• British Airways: All flights cancelled amid IT crash
• What's the difference between the com and exe extensions? (2008)
• Our understanding of the way the body handles salt may be wrong
• Better than Free (2008)