As a different chapter, this is not exactly a dupe, but it's not the first time links to parts of this book have been posted. Over the last two years, there have been a lot of HN discussions on the various chapters of this book. Here are the ones with comments:

16 days ago - https://news.ycombinator.com/item?id=9863832

8 months ago - https://news.ycombinator.com/item?id=8719371

a year ago - https://news.ycombinator.com/item?id=8258652

a year ago - https://news.ycombinator.com/item?id=8120670

a year ago - https://news.ycombinator.com/item?id=7920183

a year ago - https://news.ycombinator.com/item?id=7588158

two years ago - https://news.ycombinator.com/item?id=6794308