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The latest version of the book is B4.0, released 2 months ago. If you've bought a PDF of the book and would like to update it to this version (for free), visit your home page.

By default this page displays the errata for the latest version of the book. If you have a previous version, select it here:

If you've found a new error, please submit it.

  • Typo
  • Tech. error
  • Suggestion
  • Maybe next edition
  • Not a problem
  • Reported in: B4.0 (16-Aug-19)
PDF page: 170

I believe "feed" should be "feel".
"If that makes you feed sad, nil desperandum!"--Troy Tatsu McKinnon

  • Reported in: B4.0 (16-Aug-19)
PDF page: 302
In the following sentence, I believe "event" is supposed to be "even". "We could *event* swap the order of remove_comments and find_matching_lines an...more...

Stuff To Be Considered in the Next Edition

  • Reported in: B2.0 (28-May-19)
PDF page: 0
Paper page: 0
I'm not sure if it's in here, but "reading the API code" is a very useful skill in 2019--particularly since many environments (Java, Javascript, Cloju...more...