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The latest version of the book is B2.0, released 11 days ago. If you've bought a PDF of the book and would like to upgrade it to this version (for free), visit your home page.

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  • Typo
  • Tech. error
  • Suggestion
  • Maybe next edition
  • Not a problem
  • Reported in: B2.0 (11-Dec-17)
Paper page: 73

There is an extra "and" at the and of the first paragraph.

"...iteration of the loop has failed and and hard to run..."--Tomas Rabczak

  • Reported in: B2.0 (10-Dec-17)
PDF page: 133
The example at the top of this page seems to have a typo. It says: it "can create doubles" do twin = double(first_name: "Paul", weight: 100) ...more...