--- title: "Ruby 3.4 (preview 2) gets a new parser" publication: "Ruby Weekly" issue: 723 published_at: "2024-10-10" canonical_url: "https://rubyweekly.com/issues/723" --- Plus reading Eloquent Ruby, some excellent gems, and how to start working on Ruby's docs. | #​723 — October 10, 2024 [Read on the Web](https://rubyweekly.com/issues/723) Together with [![FastRuby.io\](https://res.cloudinary.com/cpress/image/upload/c_fill,g_auto,w_467,h_106/e_make_transparent/co_white,e_outline:14/y65nyff19ylf5udphsq4.png)](http://go.fastruby.io/rails-bump) Ruby Weekly [![\](https://res.cloudinary.com/cpress/image/upload/w_1280,e_sharpen:60,q_auto/efqpxjrvsni9g49yz8yg.jpg)](https://www.ruby-lang.org/en/news/2024/10/07/ruby-3-4-0-preview2-released/) [Ruby 3.4.0 Preview 2 Released](https://www.ruby-lang.org/en/news/2024/10/07/ruby-3-4-0-preview2-released/) — The preview releases leading up to final Christmas Day Ruby releases don’t tend to throw up many changes, but this is an exception. A significant change is that [Ruby’s default parser has been changed to Prism](https://bugs.ruby-lang.org/issues/20564), so it’s absolutely worth testing your code against it now. You can also now [use `it` as a default block parameter](https://bugs.ruby-lang.org/issues/18980), amongst other minor syntax tweaks. Yui Naruse [An Introduction to the Ruby LSP Add-on System](https://railsatscale.com/2024-10-03-the-ruby-lsp-addon-system/) — [Ruby LSP](https://shopify.github.io/ruby-lsp/) is a _language server_ that uses static analysis to improve Ruby editing features in [editors](https://shopify.github.io/ruby-lsp/editors.html#Neovim) like VS Code, Neovim and Emacs. Andy Waite [![\](https://copm.s3.amazonaws.com/297dc312.png)](http://go.fastruby.io/rails-bump) [👊RailsBump.org Is Now Supported & Maintained by FastRuby❤️](http://go.fastruby.io/rails-bump) — Exciting news! RailsBump is now run by [FastRuby.io](http://fastruby.io/). This open source, community-driven tool is great for tracking gem + Rails compatibility. What feature would make your upgrades smoother? Submit your ideas on GitHub, and let’s build it together!🚀 FastRuby + RailsBump sponsor ▶[Fireside Chat with DHH, Matz and Tobias Lütke](https://www.youtube.com/watch?v=zPBbHu-BKpQ) — Matz and DHH shared a stage for the first time alongside Shopify CEO Tobias Lütke for a nearly hour long chat about Ruby, Rails, and all things open source. There was no fire, alas, but they covered a lot about Ruby and Rails history, community, and design philosophies. YouTube **IN BRIEF:** - 🎧 Over at the _Ruby on Rails podcast_, [Elise Shaffer caught up with Ruby Central's Marty Haught](https://www.therubyonrailspodcast.com/525) to talk about Ruby Central's initiatives. - Talking of _Ruby Central_, they're looking for a new board member – [you can apply here.](https://docs.google.com/forms/d/1bOdmkW50z2mjERXg6juRJLRMNJEFcUxgu_2SjQ7AHA8/viewform?edit_requested=true) - [DHH isn't a fan](https://world.hey.com/dhh/automattic-is-doing-open-source-dirty-b95cf128) of Automattic's actions in the recent [WordPress ecosystem drama.](https://css-tricks.com/catching-up-on-the-wordpress-wp-engine-sitch/) - Later this month, _thoughtbot_ is running [a virtual open source hack day for Rubyists](https://thoughtbot.com/blog/join-thoughtbot-open-summit-2024). [The Process of Contributing to Ruby's Docs](https://nithinbekal.com/posts/contributing-ruby-docs/) — Nithin saw some areas where he felt he could improve Ruby’s docs but was intimidated by the process involved. Nithin Bekal [Join RubyConf24 Nov 13-15 for Sessions, Workshops, and Keynotes!](https://rubyconf.org/) — Meet your #RubyFriends, learn, and have fun! Register and book your hotel today! RubyConf24 sponsor [Design Patterns in Ruby](https://refactoring.guru/design-patterns/ruby) — A list of structural, behavioral, and creational patterns, each with an in-depth explanatory article and comprehensive code example. Refactoring Guru 📗 [Let's Read Eloquent Ruby: Chapter 20](https://dev.to/baweaver/lets-read-eloquent-ruby-ch-20-21aj) — In 2011, Russ Olsen released the fantastic [Eloquent Ruby](https://www.oreilly.com/library/view/eloquent-ruby/9780321700308/), a book focused on doing things ‘the Ruby way’ and using Ruby to its full advantage. Brandon has been reading and blogging about each chapter as he progresses through the book, starting all the way from [Chapter 1](https://dev.to/baweaver/let-s-read-eloquent-ruby-ch-1-g13) back in 2021. Brandon Weaver [RubyConf Chicago Dinner: Exclusive Industry Leaders Networking Invite](https://reinteractive.com/rubyconf-chicago-dinner-for-industry-leaders) — Join reinteractive for an exclusive dinner at RubyConf Chicago. Network with industry leaders & shape the future of Ruby. Rubyconf Chicago Dinner Invitation sponsor 📄 [Getting Capybara Browser Console Output for Failed Tests](https://bibwild.wordpress.com/2024/10/08/getting-rspec-capybara-browser-console-output-for-failed-tests/) Jonathan Rochkind 📄 [Running Multiple Apps on a Single Server with Kamal 2](https://nts.strzibny.name/multiple-apps-single-server-kamal-2/) Josef Strzibny 📄 [What's New in Ruby on Rails 8](https://blog.appsignal.com/2024/10/07/whats-new-in-ruby-on-rails-8.html) Damilola Olatunji 📄 [Smooth Transitions with Turbo Streams](https://railsdesigner.com/turbo-stream-transitions/) Rails Designer 🛠 Code & Tools [![\](https://res.cloudinary.com/cpress/image/upload/w_1280,e_sharpen:60,q_auto/oousudlps3yv1twmfpli.jpg)](https://www.fullstackruby.dev/fullstack-development/2024/10/07/top-ten-favorite-ruby-web-application-gems/) [Top 10 Most Excellent Gems to Use in Any Ruby Web App](https://www.fullstackruby.dev/fullstack-development/2024/10/07/top-ten-favorite-ruby-web-application-gems/) — These are personal favorites of the author, but his choices are good and cover both well known things like Dotenv and Concurrent Ruby to less common choices like [Nokolexbor](https://github.com/serpapi/nokolexbor), an HTML parser based on Lexbor. Jared White [Prompts: User-Friendly Forms/Inputs for Command-Line Ruby Apps](https://github.com/fractaledmind/prompts) — If you’re building a basic CLI app and you want users to enter text, pick from a range of options, or to confirm actions, this makes it a lot smoother to do. Stephen Margheim [Mastodon 4.3: The Federated, Self-Hosted Microblogging App](https://blog.joinmastodon.org/2024/10/mastodon-4.3/) — [Mastodon](https://joinmastodon.org/) is the most widely deployed Rails app (or, arguably, second to only [Discourse](https://github.com/discourse/discourse)) powering a wide federation of Twitter-esque social media sites. v4.3 is a major update, largely on the front end, with an improved design and notifications. [Technical release notes.](https://github.com/mastodon/mastodon/releases/tag/v4.3.0) Mastodon gGmbH. [Authentication Zero 4.0: Auth System Generator for Rails](https://github.com/lazaronixon/authentication-zero) — Rather than being an authentication _library_, this generates a pre-built authentication system within your app directly which you can then modify as you see fit. Lázaro Nixon [Neighbor: Nearest Neighbor Search for Rails](https://github.com/ankane/neighbor) — Now supporting Postgres, SQLite, MariaDB and MySQL, you can use this for things [like implementing semantic search systems.](https://firehydrant.com/blog/semantic-search-with-ruby-on-rails/) Andrew Kane - ←...→ [Pagy 9.1](https://github.com/ddnexus/pagy/releases/tag/9.1.0) – The popular pagination system for Ruby apps. Now with [fast keyset pagination](https://ddnexus.github.io/pagy/docs/api/keyset/) for 'big data'. - [StoreModel 4.1](https://github.com/DmitryTsepelev/store_model) – Wrap JSON-backed DB columns with ActiveModel-like classes. - [rswag 2.15](https://github.com/rswag/rswag) – Extend request specs with a Swagger-based DSL for describing and testing API operations. - [ActiveMedian 0.5](https://github.com/ankane/active_median) – Medians/percentiles for Active Record, Mongoid, arrays and hashes. - [Unread 0.14](https://github.com/ledermann/unread) – Manage read/unread status of Active Record objects. - [counter_culture 3.8](https://github.com/magnusvk/counter_culture) – Turbo-charged counter caches for Rails apps. - [Blind Index 2.6](https://github.com/ankane/blind_index) – Securely search encrypted database fields. - [Maxitest 5.7](https://github.com/grosser/maxitest) – Minitest, but with lots of added features. - [Measured 3.1](https://github.com/Shopify/measured) – Encapsulate measurements and their units. - [Good Job 4.4](https://github.com/bensheldon/good_job) – Postgres-backed job queue for Rails. - [Gemsmith 22.7](https://github.com/bkuhlmann/gemsmith) – CLI tool for smithing Ruby gems. - [RubyGems 3.5.21](https://blog.rubygems.org/2024/10/03/3.5.21-released.html) 📰 Classifieds 🧰 Building AI apps on Postgres? [pgai empowers devs with AI superpowers](https://github.com/timescale/pgai), enabling integration of AI workflows for tasks like embedding creation and model completion. --- 🐘 Postgres user? Be sure to [check out our latest Postgres newsletter](https://postgresweekly.com/issues/573), including things like how to optimize table layouts, how Postgres 17 is faster than ever before, and updates to popular extensions. Curated by [Peter Cooper](https://twitter.com/cooperx86) and [Glenn Goodrich](https://twitter.com/ruprict). Published by [Cooperpress](https://cooperpress.com/). 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