The document lists the author's top five favorite Ruby gems, including Mailcatcher, Pretender, ActiveRecord Import, Webpacker, and Capybara, along with a brief description and demo links for each. It also includes honorable mentions of other useful gems such as Bundler, Devise, and RSpec. The author invites others to share their favorite gems as well.

1. My Top 5 Favorite
Gems
by Jimmy Ngu

2. #1
MailCatcher

3. https://github.com/sj26/mailcatcher

5. Demo

6. #2
Pretender

7. https://github.com/ankane/pretender

8. Demo

9. #3
ActiveRecord Import

10. https://github.com/zdennis/activerecord-import

12. Demo

13. #4
Webpacker

14. https://github.com/rails/webpacker

16. Before webpacker
• browserify-rails + react-rails / react_on_rails
• hot reload is a pain to setup
• // imports in multiple asset bundles
• not utilizing webpack
After webpacker
• zero configuration

17. Demo

18. #5
Capybara

19. https://github.com/teamcapybara/capybara

20. • Most popular test framework
• Easily configurable & extendable
• Tonnes of add ons (e.g. capybara + poltergeist / webkit /
headless chrome)

21. But did you know?
• Web Automation (alternative to Mechanize)
• Supports JS with headless browser add on (e.g.
poltergeist)

22. Demo

23. https://github.com/jimmynguyc/sc2replaystats-uploader

24. Honorable Mentions
• Bundler
• Cancancan / Pundit
• pry-byebug
• Carrierwave / Paperclip
• Sidekiq
• apipie-rails / grape-
swagger-rails
• Devise
• ActiveRecord
• Capistrano
• Rspec / FactoryGirl /
SimpleCov
• Rubocop

25. So what’s your favorite gems?

26. Thanks !!