--- title: "It's the final issue of 2025 - maybe!" publication: "Ruby Weekly" issue: 780 published_at: "2025-12-18" canonical_url: "https://rubyweekly.com/issues/780" --- Plus building Ruby extensions with Go, picking a Rails admin gem, and the top 5 videos of 2025. | #​780 — December 18, 2025 [Read on the Web](https://rubyweekly.com/issues/780) Together with [![Tiger Data logo\](https://res.cloudinary.com/cpress/image/upload/c_fill,g_auto,w_1280,h_282/e_make_transparent/co_white,e_outline:30/px1u7kjyvz7xnbm6ytir.png)](https://www.tigerdata.com/blog/how-cern-powers-ground-breaking-physics-with-timescaledb) Ruby Weekly [![\](https://res.cloudinary.com/cpress/image/upload/w_1280,e_sharpen:60,q_auto/taohi2gswb5mls3mx38b.jpg)](https://nithinbekal.com/posts/ruby-4-0/) [What's New in Ruby 4.0](https://nithinbekal.com/posts/ruby-4-0/) — It’s exactly a week till Ruby 4.0 is expected to land (on Christmas Day!) and while the official release notes will be the eventual ‘go to’ for discovering everything that’s new, Nithin has done a good job of rounding up the headline changes here. Nithin Bekal [Ruby 4.0.0 Preview 3 Released](https://www.ruby-lang.org/en/news/2025/12/18/ruby-4-0-0-preview3-released/) — Can't wait for Christmas Day to unwrap 4.0? The latest preview is out along with a thorough set of notes on what’s new. There are [hundreds of minor changes since preview 2](https://github.com/ruby/ruby/compare/v4.0.0-preview2...v4.0.0-preview3), but notably `bundle gem` now [has an `--ext=go` option](https://github.com/ruby/ruby/commit/4423facbffd5bd523541ebf42dc274272b1de732#diff-30c32f007686dfeb5dbbafb5be6225f7f3823eb563ae33ca44ebe9fcef9c7cd4) to scaffold a native extension in Go (using [go-gem-wrapper](https://github.com/ruby-go-gem/go-gem-wrapper)). Yui Naruse [![\](https://res.cloudinary.com/cpress/image/upload/c_limit,w_480,h_480,q_auto/copm/4d77ee96.png)](https://www.tigerdata.com/blog/how-cern-powers-ground-breaking-physics-with-timescaledb) [CERN Chooses TimescaleDB to Power Its Next-Gen Archiver](https://www.tigerdata.com/blog/how-cern-powers-ground-breaking-physics-with-timescaledb) — TimescaleDB brings PostgreSQL performance to a new level at CERN: faster writes, huge compression gains, and 10–40x faster queries. See why it’s becoming the new standard for historical data across 500+ control systems. Tiger Data sponsor **⚡️ IN BRIEF:** - [Ruby 3.4.8 has been released](https://www.ruby-lang.org/en/news/2025/12/17/ruby-3-4-8-released/) with a [large number](https://github.com/ruby/ruby/releases/tag/v3_4_8) of minor bug fixes. - 🏆 [Marco Roth has been chosen as this year's _Rails Luminary_](https://rubyonrails.org/2025/12/17/marco-roth-2025-rails-luminary), not least for his epic work on [Herb](https://herb-tools.dev/) and [ReActionView](https://reactionview.dev/). - [RubyGems/Bundler 4.0.2](https://blog.rubygems.org/2025/12/17/4.0.2-released.html) has been released with a new `-j` flag to specify the number of concurrent jobs that can run when building native extensions. - Aaron 'tenderlove' Patterson is particularly excited that [object allocations will get faster in Ruby 4.0.](https://skywriter.blue/pages/did:plc:3n6tlxabmocwe3nyl4b3rtjk/post/3m7vfv44nqc2y) - Amanda Perino shares [a quick update on _Rails World 2026_](https://rubyonrails.org/2025/12/11/rails-world-2026-update) – it's taking place in Austin, Texas next September 23-24. [How to Choose the Right Admin Gem for Your Rails App](https://businessclasskit.com/blog/admin-gems-for-rails) — The author of the [Business Class](https://businessclasskit.com/) Rails app starter template ponders the role of ‘admin panels’, particularly as 37signals’ new [Fizzy](https://github.com/basecamp/fizzy) app doesn’t come with one, and shares four potential well-built options. Josef Strzibny [Why Are `exec` and `run` So Confusing?](https://andre.arko.net/2025/12/14/exec-vs-run/) — André is working on the [rv](https://github.com/spinel-coop/rv) Ruby version manager and runner and explains the role of `exec` and `run` commands in `rv` as well as Bundler, npm, and Cargo – all of which have similar concepts but with slightly different takes. André Arko [🧠 Smart Rails Applications Are Not the Future, They're the Present](https://sinaptia.dev/posts/building-intelligent-applications-with-rails?utm_source=cooperpress&utm_medium=newsletter&utm_campaign=rubyweekly-2025q4&utm_content=sponsored) — We identify problems worth solving with AI and [implement cost-effective solutions](https://sinaptia.dev/blog/tags/ai/?utm_source=cooperpress&utm_medium=newsletter&utm_campaign=rubyweekly-2025q4&utm_content=sponsored) that save significant organizational time. SINAPTIA sponsor ❄️ [Add Snow to Your App with Stimulus](https://railsdesigner.com/let-it-snow-stimulus/) – ‘Tis the season! Rails Designer 📄 [The Ruby2JS Story: A Decade of Transpilation](https://www.ruby2js.com/updates/ruby2js-story) Sam Ruby 🎧 [Jay Tennier on How Testing Platform Rainforest QA Tests Itself](https://onrails.buzzsprout.com/2462975/episodes/18317355-jay-tennier-how-testing-platform-rainforest-qa-tests-itself) _On Rails_ Podcast 📄 [Beautiful Rails Confirmation Dialogs (with Zero JavaScript)](https://boringrails.com/articles/data-turbo-confirm-beautiful-dialog/) Swanson and Margheim 📄 [How the 'Load Path' Works in Ruby](https://www.visuality.pl/posts/load_path_in_ruby_how_it_works) Michał Łęcicki 🛠 Code & Tools [TreeHaver: Cross-Ruby Adapter for the Tree-Sitter and Citrus Parsing Libraries](https://github.com/kettle-rb/tree_haver) — Working on MRI Ruby, JRuby, and TruffleRuby, TreeHaver attempts to offer the most universal, unified language parsing implementation available (for any structured language, not just Ruby). [Here’s an example](https://github.com/kettle-rb/tree_haver?tab=readme-ov-file) of using it to parse the TOML format. Peter H. Boling [ruby-ti: A Static Type Checker for mruby, Written in Go](https://github.com/engneer-hamachan/ruby-ti) — It parses [mruby](https://mruby.org/) code, infers types, and catches type errors before runtime. It also includes LSP support for editor integration. Hamachang [🚨 Stuck on Rails 5.2? Need a Complete Action Plan by FastRuby.io?](http://go.fastruby.io/o36) — Our [Roadmap](http://go.fastruby.io/o36) is backed by 50k dev/hs of experience. No budget? No problem! Get our [AI-enhanced Rails Roadmap](http://go.fastruby.io/free-automated-roadmap) in minutes. The Rails Upgrade Roadmap sponsor [Kimurai 2.0: A Ruby Web Scraping Framework](https://github.com/vifreefly/kimuraframework) — A Capybara and Nokogiri based scraper that can use headless Chromium or Firefox to support JavaScript-rendered sites. It’s been many years without a release, but [v2.0](https://github.com/vifreefly/kimuraframework/blob/master/CHANGELOG.md#200) brings things up to Ruby 3.x standards and adds Selenium Manager support. Victor Afanasev [Loofah 2.25.0: Nokogiri-Powered HTML/XML Manipulation and Sanitization](https://github.com/flavorjones/loofah) — A library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri, that also includes HTML sanitizers based on html5lib’s safelist. Mike Dalessio - [Minitest 6.0](https://github.com/minitest/minitest/blob/master/History.rdoc#600--2025-12-17) – This has only just dropped and is a significant release we'll cover in the next issue. - [StoreModel v4.4](https://github.com/DmitryTsepelev/store_model) – Wrap JSON-backed columns with ActiveModel-like classes. - [twilio-ruby 7.9.0](https://github.com/twilio/twilio-ruby) – Communicate with the Twilio API and generate TwiML. - [Kamal v2.10](https://github.com/basecamp/kamal/releases/tag/v2.10.0) – Deploy web apps anywhere with containerization. - [telegram-bot-ruby v2.5.0](https://github.com/atipugin/telegram-bot-ruby) – Ruby wrapper for Telegram's Bot API. - [Sidekiq 8.1](https://github.com/sidekiq/sidekiq/blob/main/Changes.md#810) – The long-standing background processing system. - [Capistrano v3.20](https://github.com/capistrano/capistrano) – The deployment automation framework. - [RDoc 7.0](https://github.com/ruby/rdoc/releases/tag/v7.0.0) 🏆 The Top 5 Ruby Videos of 2025 As judged by reader engagement across the year – not purely by views! ▶1. [Why to Use Jupyter Notebooks with Ruby](https://www.youtube.com/watch?v=6c5-VEx4Wgw) — There have been a few attempts at bringing ‘notebook’ style programming, commonly associated with Python, to Ruby (e.g. [IRuby](https://github.com/SciRuby/iruby?tab=readme-ov-file)) but Landon does a good job of explaining the _why_ and the benefits here. Landon Gray ▶2. [How To Build Basic Desktop Applications in Ruby](https://www.youtube.com/watch?v=TTSqRdTVtDY) — Technically a 2024 talk, but one we first linked to this year, by the creator of the [Glimmer](https://github.com/AndyObtiva/glimmer) suite of Ruby DSL-driven desktop and Web app building frameworks. Andy Maleh ▶3. [An Introduction to Functional Ruby](https://www.youtube.com/watch?v=Y-qSi5Utgz8) — A 20-minute talk from this year’s _Functional Conf_ that explores Ruby from a functional programming perspective. Keith Bennett ▶4. [Rails 8 Unpacked: Inside the Default `Dockerfile`](https://www.youtube.com/watch?v=j80I0yyx0w4) — A 10-minute explainer. typecraft ▶5. [An Interview with Yukihiro 'Matz' Matsumoto](https://www.youtube.com/watch?v=iwDJ6zmuI_w) — Ruby’s creator Matz was interviewed about Ruby, his work-life balance, and experiences being a father. It’s not highly technical, but a good interview if you want to get a more rounded view of Matz and how he’s thinking about Ruby’s future. Baltic Ruby **Want more? [rubyevents.org](https://www.rubyevents.org/) is exactly what you need.** It's an index covering over 8,000 talks from almost 700 events; many of them with videos. Luckily, there's a search feature, too, so you can just look for [videos about Ractors](https://www.rubyevents.org/talks?s=ractors) or [fibers](https://www.rubyevents.org/talks?s=fibers), say. 🎄 This is the final issue of the year - in theory. We _might_ drop a random issue to celebrate the Ruby 4.0 launch, but our next _scheduled_ issue is on Thursday, January 8. If we don't see you again before then, we hope you have a happy holiday season! Curated by [Peter Cooper](https://twitter.com/cooperx86) and [Glenn Goodrich](https://twitter.com/ruprict). Published by [Cooperpress](https://cooperpress.com/). [Change your email](https://rubyweekly.com/edit_subscription/*|UID|*) or [Stop getting this newsletter.](https://rubyweekly.com/leave/*|UID|*) © Cooper Press Ltd · Fairfield Enterprise Centre, Louth, LN11 0LS, United Kingdom Other weekly newsletters we publish include [Postgres Weekly](https://postgresweekly.com/), [React Status](https://react.statuscode.com/), [Frontend Focus](https://frontendfoc.us/), and [JavaScript Weekly](https://javascriptweekly.com/).