---
title: "This week's Ruby news, issue 281"
publication: "Ruby Weekly"
issue: 281
published_at: "2016-01-21"
canonical_url: "https://rubyweekly.com/issues/281"
---

This week's Ruby news, issue 281

This week's Ruby and Rails news[Read this e-mail on the Web](http://rubyweekly.com/issues/281)

Ruby WeeklyIssue 281 — January 21, 2016

David Heinemeier Hansson[The Ruby on Rails Doctrine](http://rubyonrails.org/doctrine/)DHH reflects on how Rails continues to remain a powerful force in the world of Web development through eight core values that make up what he calls the _Rails Doctrine._


ruby-lang.org[A Code of Conduct for Ruby (MRI) Developers](https://bugs.ruby-lang.org/issues/12004)Numerous projects and communities have adopted a CoC or had discussions about them recently. Now it’s Ruby’s turn and, well, it’s gotten complicated.


Zachary Scott[The Pitch for mruby](http://zzak.io/log/2016-01-15-the-pitch-for-mruby.html)mruby is a lightweight, embeddable Ruby implementation. The author says “it will play a big role in the future of Ruby” and explains why. I agree with him.


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David Heinemeier Hansson[Rails Gets A New Identity and Site](http://weblog.rubyonrails.org/2016/1/19/new-rails-identity/)[rubyonrails.org](http://rubyonrails.org/) is now sporting a new, cleaner design, and Rails has a new logo too.


Ross Kaffenberger[What's New in Ruby 2.3 Enumerable](https://rossta.net/blog/whats-new-in-ruby-2-3-enumerable.html)Two new `Enumerable` instance methods were added, `grep_v` and `chunk_while`, both variations of other `Enumerable` methods.


Damir Svrtan[Trends in Ruby - Analyzing Rubygems Stats for 2015](https://infinum.co/the-capsized-eight/articles/analyzing-rubygems-stats-v2015)Lots of tasty stats and insights here. Fewer gems were created or updated in 2015 than 2014 (the first fall ever), but downloads are up.


Jesus Castello[11 Ruby Tricks You (Maybe) Haven't Seen Before](http://www.blackbytes.info/2016/01/ruby-tricks/)I knew all but one of these but I love poking around with this stuff. I’m sure you’ll find a new tidbit here, even if it’s not useful for everyday coding.


Jobs

- [Full Stack Engineer Ruby on Rails at Babbel (Berlin)](http://4scotty.com/babbel-ruby-on-rails?utm_source=rubyweekly&utm_medium=newsletter&utm_content=babbel&utm_campaign=rubyweekly_4_babbel)Join our vibrant international team from over 20 different nationalities to change how millions of users worldwide learn languages. See what we can offer you on top of a lively startup atmosphere and great company benefits. Babbel
- [Ruby Developer at Composed](https://composed.recruiterbox.com?utm_source=rubyweekly&utm_medium=email)Composed is an innovative music streaming service that helps people discover the classical music they love. We are seeking a Ruby developer to join our multidisciplinary team, develop our API systems, and support additional platforms such as Sonos. Composed
- [Ruby Skills are in demand](http://www.indeed.com/prime?sid=xp_cooperpress&kw=rubyweekly)Indeed Prime is an elite new program from Indeed.com that presents in-demand tech talent like you to top employers. Indeed Prime opens the door to exciting career opportunities with one simple application. Join today. Indeed.com

In brief

- [Opal 0.9 Released: The Ruby to JavaScript Compiler](http://opalrb.org/blog/2016/01/13/opal-0-9/?utm_source=rubyweekly&utm_medium=email) news code 
You can now make direct JavaScript method calls.
- [A Discussion on Removing Rubinius Support from ruby-build](https://github.com/rbenv/ruby-build/issues/862?utm_source=rubyweekly&utm_medium=email) news GitHub
- [Discussion on the Future of rails-assets.org](https://github.com/rails-assets/rails-assets/issues/291?utm_source=rubyweekly&utm_medium=email) news GitHub
- [Building Microservices with Docker and the Rails API Gem](https://medium.com/connect-the-dots/building-microservices-with-docker-and-the-rails-api-gem-2a463862f5d?utm_source=rubyweekly&utm_medium=email) tutorial Charles Wang
- [Building A Static Site with A Web Framework](https://medium.com/@albertstill/building-a-static-site-with-a-web-application-framework-using-wget-aws-s3-cli-circleci-5b9285d1af1d?utm_source=rubyweekly&utm_medium=email) tutorial 
The idea is you can still use Rails or Sinatra, say, but then make the site static with wget, AWS S3, and CircleCI. Albert Still
- [1 to 1000 - Scaling a Rails App on Heroku](https://joinhandshake.com/engineering/scaling/heroku/2016/01/15/1-to-1000-scaling-a-rails-app-on-heroku.html?utm_source=rubyweekly&utm_medium=email) heroku tutorial 
Some quick tips from a team that’s 10x scaled a Ruby app on Heroku. Drew Zader
- [Running a Rails Application on Deis](http://blog.codeship.com/running-a-rails-application-on-deis/?utm_source=rubyweekly&utm_medium=email) tutorial 
Deis is a lightweight application platform that deploys and scales Twelve-Factor apps as Docker containers across a cluster of CoreOS machines. Ilija Eftimov
- [Adding Columns with Default Values to Really Large Tables in Postgres + Rails](http://engineering.wework.com/data/2015/11/05/add-columns-with-default-values-to-large-tables-in-rails-postgres/?utm_source=rubyweekly&utm_medium=email) tutorial WeWork Engineering
- [Don't Forget to Expose Headers When Using Rack CORS](http://glaucocustodio.github.io/2016/01/20/dont-forget-to-expose-headers-when-using-rack-cors/?utm_source=rubyweekly&utm_medium=email) opinion Glauco Custódio
- [5 Reasons Automated Testing Is Worth the Investment](http://blog.codeship.com/5-reasons-for-automated-testing/?utm_source=rubyweekly&utm_medium=email) opinion Matthew Setter
- [Redis Performance Dashboard and Autoscaling from RedisGreen](https://dashboard.redisgreen.net/new?utm_source=rubyweekly&utm_medium=email&utm_campaign=2016a&utm_content=link&utm_term=seamless+autoscaling+performance) tools 
Seamless scaling and analytics backed by support from engineers who have been scaling Redis for years. RedisGreenSponsored
- [Derailed Benchmarks: Rails and Ruby App Benchmarking Tools](https://github.com/schneems/derailed_benchmarks/?utm_source=rubyweekly&utm_medium=email) tools Richard Schneeman
- [devise-argon2: A devise-encryptable Password Encryptor That Uses Argon2](https://github.com/erdostom/devise-argon2?utm_source=rubyweekly&utm_medium=email) code 
Argon2 won the [Password Hashing Competition.](https://password-hashing.net/) Tamas Erdos
- [SimpleSlackBot: Wrapper for Creating a Slack Bot in Ruby](https://github.com/kciter/simple-slack-bot?utm_source=rubyweekly&utm_medium=email) code Lee Sun-Hyoup
- [ItSorts: Tiny Helper Lib for Understandable Array Sorting](https://github.com/Masa331/it_sorts?utm_source=rubyweekly&utm_medium=email) code Premysl Donat
- [tqdm-ruby: Add A Progress Bar to Your Loops](https://github.com/powerpak/tqdm-ruby?utm_source=rubyweekly&utm_medium=email) code 
A port of Python’s tqdm. I like this. Theodore Pak
- [react_on_rails: Integration of React + Webpack + Rails to Build Isomorphic Apps](https://github.com/shakacode/react_on_rails?utm_source=rubyweekly&utm_medium=email) code Shaka Code
- [Like the Idea of Ongoing Improvements to Your Rails App?](https://www.reinteractive.net/service/code-care?sid=33) 
CodeCare is a fixed price, month-to-month Rails app maintenance service. Sign up for ongoing upgrades and improvements and stop putting off all those small changes and security updates. ReinteractiveSponsored

Curated by [Peter Cooper](https://twitter.com/peterc) and [Glenn Goodrich](https://twitter.com/ruprict), and published by [Cooperpress](https://cooperpress.com/).
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