--- title: "#379: Ten New Features in Ruby v2.5" publication: "Ruby Weekly" issue: 379 published_at: "2017-12-14" canonical_url: "https://rubyweekly.com/issues/379" --- #379: Ten New Features in Ruby v2.5 This week's Ruby and Rails news[Read this e-mail on the Web](http://rubyweekly.com/issues/379) Ruby WeeklyIssue 379 — December 14, 2017 Tom Lord[10 (More) New Features in Ruby v2.5](https://tom-lord.github.io/10-More-New-Features-In-Ruby-2.5/)Ruby 2.5’s release is scheduled for December 25th, as is traditional in the Ruby community. Here are some features you may not have known about yet. Vijay Kumar Agrawal[Ruby 2.5's New 'yield_self' Method](http://blog.bigbinary.com/2017/12/12/ruby-2-5-added-yield_self.html)`yield_self` passes the receiver to the given block. Here’s a look at how it works. StreamSponsored[Build a Social Network with Ruby](https://getstream.io/build/social-networks/ruby/?utm_campaign=Online%20Advertising&utm_source=Ruby%20Weekly&utm_medium=Ruby%20Weekly%20Newsletter)Stream API + Ruby are the go-to solution for developers building social feeds. Speed up your development. [![Stream\](https://copm.s3.amazonaws.com/18d7b120.png)](https://getstream.io/build/social-networks/ruby/?utm_campaign=Online%20Advertising&utm_source=Ruby%20Weekly&utm_medium=Ruby%20Weekly%20Newsletter) Dustin Zeisler[ActiveMocker: Generate Stub Classes From ActiveRecord Models](https://github.com/zeisler/active_mocker)Handy for generating mocks from ActiveRecord models for unit tests that run fast without loading Rails or a database. Caleb Thompson[Running Jekyll on Heroku](https://blog.heroku.com/jekyll-on-heroku)A start-to-finish guide to using the static site generator to create sites to be served from Heroku. Katy Farmer[Getting Started with Metrics in Rails](https://www.influxdata.com/blog/metrics-for-true-beginners/)A walk through the process of introducing metrics tools to a Rails app and visualizing the results. Tom Black[Reimagining 2D Graphics and Game Development with Ruby](http://www.blacktm.com/rubyconf/)A video (but with extensive slides and notes you can read instead, if you prefer) on a relatively uncommon use for Ruby. Jobs - [Full Stack Rails Engineer (Remote in US, Canada, Brazil)](https://internal.interviewed.com/jobs/full-stack-engineer-hdaw?source=rubyweekly)Help us make the hiring process better for 100m+ job seekers across the globe. Work on product, scalability or internal tools. Interviewed (acquired by Indeed) - [Ruby on Rails Integrations Engineer (Remote: Anywhere US or Europe)](https://www.elastic.co/about/careers/engineering/jobs/954448?utm_source=rubyweekly&utm_medium=email)Elastic is seeking an open source enthusiast to help develop and maintain the integration between the Ruby on Rails platform and the Elastic stack. Elastic (Formerly Elasticsearch) In brief - [JRuby 9.1.15.0 Released](http://jruby.org/2017/12/07/jruby-9-1-15-0.html?utm_source=rubyweekly&utm_medium=email) news - [Ruby on Ice Conference Coming in January 2018 (Germany)](https://rubyonice.com/2018?utm_source=rubyweekly&utm_medium=email) news Ruby On Ice - [Smarter Rails Services with Active Model Modules](https://dev.to/sophiedebenedetto/smarter-rails-services-with-active-model-modules-17o?utm_source=rubyweekly&utm_medium=email) tutorial Sophie DeBenedetto - [Parsing RSS, Atom, and Other Web Feeds with FeedParser](https://planetruby.github.io/advent2017/08-feedparser?utm_source=rubyweekly&utm_medium=email) tutorial Ruby Advent Calendar - [Detailed Custom Dockerfile Example for Ruby](https://circleci.com/docs/2.0/custom-images/#detailed-custom-dockerfile-example-for-ruby?utm_source=cooperpress&utm_medium=newsletter&utm_campaign=december&utm_content=ruby-weekly) tutorial CircleCISponsored - [Modern Frontends in Rails: Building Components](https://evilmartians.com/chronicles/evil-front-part-2?utm_source=rubyweekly&utm_medium=email) tutorial Evil Martians - [Running Jekyll with Docker and OpenShift](https://www.redpill-linpro.com/sysadvent/2017/12/10/jekyll-openshift.html?utm_source=rubyweekly&utm_medium=email) tutorial Lars Olafsen - [Subscribing to RabbitMQ using Rails on Heroku](https://blog.showoff.ie/subscribing-to-rabbitmq-using-rails-on-heroku-336afb14d72d?utm_source=rubyweekly&utm_medium=email) tutorial Michael Dever - [Adventures in Automated Code Replacement](http://ideia.me/adventures-on-automated-code-replacement?utm_source=rubyweekly&utm_medium=email) tutorial Using [fast](https://github.com/jonatas/fast) to search through the Abstract Syntax Tree and rewrite code based on matches. Jônatas Davi Paganini - [Object-Oriented Design Patterns in Life](http://www.sihui.io/design-patterns/?utm_source=rubyweekly&utm_medium=email) tutorial An in-progress series explaining design patterns with real-world concepts. Sihui Huang - [A Real Use of Ruby Singleton Classes](https://www.puzzle.ch/blog/articles/2017/12/11/the-real-use-of-ruby-singleton-classes?utm_source=rubyweekly&utm_medium=email) tutorial A review of Ruby’s inheritance structure and singleton classes. Puzzle ITC - [Rails App Silently Crashes on Ruby 2.4](https://www.engineyard.com/blog/rails-app-silently-crashes-on-ruby-2.4?utm_source=rubyweekly&utm_medium=email) This is a story of a bug I found and the fix up to date on Ruby 2.4 changes. Engine YardSponsored - [Refactoring Towards Immutable Objects in Ruby](http://dustinzeisler.com/refactoring/2017/12/11/refactor-towards-immutable-objects-ruby.html?utm_source=rubyweekly&utm_medium=email) video Dustin Zeisler - [Discussing Strings and Encodings in Ruby with Aaron Lasseigne](https://devchat.tv/ruby-rogues/rr-340-strings-encodings-ruby-aaron-lasseigne?utm_source=rubyweekly&utm_medium=email) podcast Ruby Rogues - [24/7 Operations Support Built for ROR](https://reinteractive.com/enquiries/new?code=ops_care&sid=136) Keep your team busy building your app, not solving ops headaches. Unlimited deploys, immediate roll-back and more. OpsCare by reinteractiveSponsored - [LightIO: A New Experimental Ruby Networking Library](https://github.com/jjyr/lightio?utm_source=rubyweekly&utm_medium=email) code .. that combines Ruby fibers and a fast IO event loop. - [pretty-diffs: Enable Fancy Colored Diffs in Your Minitest Assertions](https://github.com/angelkar/pretty-diffs?utm_source=rubyweekly&utm_medium=email) code Angelos Karagkiozidis - [logs: Rails Engine for Viewing Paginated Logs From A Browser](https://github.com/kirillshevch/logs?utm_source=rubyweekly&utm_medium=email) code Kirill Shevchenko - [ActiveRecord::MTI: Support for Postgres's Native Inherited Tables](https://github.com/TwilightCoders/active_record-mti?utm_source=rubyweekly&utm_medium=email) code Twilight Coders Curated by [Peter Cooper](https://twitter.com/peterc) and [Glenn Goodrich](https://twitter.com/ruprict), and published by [Cooperpress](https://cooperpress.com/). Send feedback by simply replying to this mail. Want to sponsor an issue? 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