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Programming Ruby 4.0 in Beta

by Noel Rappin —

Programming Ruby 4.0 is out and the new beta runs against Ruby 4.0 final.

https://pragprog.com/titles/ruby6/programming-ruby-4-6th-edition/

New features in the book include:

  • All syntax updates for Ruby 3.4 and 4.0
  • Ractor section rewritten to cover new API
  • More information on Prism,
  • Ruby::Box
  • RubyGems and Bundler 4.0
  • Many other library discussions refreshed, including Minitest 6.0
  • Concurrent-Ruby and Async added to the threading chapter
  • Literal added to the types chapter

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