1. Update Your Gems Early and Often

  2. Composition vs Inheritance

  3. Building Reusable Object-Oriented Systems: Composition

  4. Building Reusable Object-Oriented Systems: Modules

  5. Building Reusable Object-Oriented Systems: Inheritance

  6. Acceptance Tests with Subdomains

  7. Priming the pump

  8. Elixir for Rubyists

  9. HyperLogLogs in Redis

  10. Fundamentals of Test-Driven Development, Now on Upcase