Ruby On Rails

Tutorials

Find the Last Matching Element with rfind - Andy Croll

Find the Last Matching Element with rfind - Andy Croll Ruby 4.0 landed during Christmas 2025 with a bunch of new features. One small but useful addition is Array#rfind, which finds the last element in an array that matches a condition.

Portable mruby binaries with Cosmopolitan

Portable mruby binaries with Cosmopolitan How to avoid complex cross-compilation and provide just one binary for all platforms. One of my main interests with mruby is its ability to create standalone executables. As explored in this post, this is absolutely possible and works well. Howeve...

Building an AI-Powered Mobile App with Ruby on Rails and DigitalOcean | 10 Grounds

Building an AI-Powered Mobile App with Ruby on Rails and DigitalOcean | 10 Grounds Building an AI-powered consumer app today comes with a lot of noise. New frameworks, new models, new infrastructure patterns — all promising speed, scale, and intelligence out of the box. When we started building CoChefy, our goal was much simple...

Rails 7.2 Connection Pool Changes May Slow Down Your App | Code With Rails

Rails 7.2 Connection Pool Changes May Slow Down Your App | Code With Rails After upgrading to Rails 7.2, you might notice your app is a bit slower. Not dramatically, but measurably—around 5-6% in real-world benchmarks. It comes down to how ActiveRecord now manages database connections. The Change In Rails 7.1, each thre...

Kevin Newton | A Ruby YAML parser

Kevin Newton | A Ruby YAML parser Recently I built the psych-pure gem, a pure-Ruby implementation of a YAML 1.2 parser and emitter. It fully conforms to the YAML 1.2 specification, passes the entire YAML test suite, and allows you to preserve comments when loading and dumping YAML...

Kevin Newton | A Ruby Regular Expression Engine

Kevin Newton | A Ruby Regular Expression Engine Recently I put some finishing touches on the exreg gem, a pure-Ruby implementation of a Unicode regular expression engine. It supports nearly all of the same functionality as Onigmo, the Ruby regular expression engine, with caveats listed in the R...

The Automated Roadmap to Upgrade Rails - FastRuby.io

The Automated Roadmap to Upgrade Rails - FastRuby.io The Roadmap to Upgrade Rails opens a new window is FastRuby.io’s discovery product that helps teams plan and execute their Rails upgrade projects. We’re happy to introduce an Automated Version of the Roadmap, powered by an AI agent, available com...

Optimizing Garbage Collection in Rails with Autotuner

Optimizing Garbage Collection in Rails with Autotuner Autotuner is a tool designed to optimize the performance of Ruby on Rails applications by fine-tuning the garbage collector (GC). It integrates seamlessly with Rails as middleware and collects data on GC activity between requests. Based on this da...

class Set - Documentation for Ruby 4.1

class Set - Documentation for Ruby 4.1 The Set class implements a collection of unordered values with no duplicates. It is a hybrid of Array’s intuitive inter-operation facilities and Hash’s fast lookup. Set is easy to use with Enumerable objects (implementing each). Most of the initi...

class Ruby::Box - Documentation for Ruby 4.1

class Ruby::Box - Documentation for Ruby 4.1 Ruby Box is designed to provide separated spaces in a Ruby process, to isolate application codes, libraries and monkey patches. Known issues Experimental warning is shown when ruby starts with RUBY_BOX=1 (specify -W:no-experimental option to hide...

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