This week's Ruby news, issue 334

Jobs

• Opportunities abound on one of the UK's best Ruby/Rails apps!Want to help over 55,000 small businesses be awesome at doing their finances? We have many opportunities for Ruby engineers, tech leads and managers. FreeAgent
• Senior Engineer at Code for America (San Francisco, CA)Use Ruby for good. Join us and help millions of low-income Americans get an extra $150 / month for food. Code For America

Can't find the right job? Want companies to apply to you?Try Hired.com.

In brief

• Working with the Evernote API in Rails tutorial 
  Daniel P. Clark
• Evented GPIO on the Raspberry Pi with Ruby tutorial 
  Aaron Patterson
• How to Integrate Bootstrap 4 in Rails 5 Gem-Free tutorial 
  Bala Paranj
• How To Add Active Admin to a Rails 5 API Application tutorial 
  Carlos Ramirez III
• Founders/CTOs: We upgrade Rails so that your team doesn't have to. 
  UpgradeRails is a service from the founders of Hint.io and Honeybadger.io. Let our expert team keep your apps up to date so that you can focus on features, not maintenance. 
  UpgradeRails   Sponsored
• Achieving Parallelism in MRI Using I/O-Bound Threads tutorial 
  Mike Kim
• Shameless: Engineering Our Schemaless Data Store tutorial
  Shameless is a gem that abstracts sharding and schemaless access to MySQL. 
  Olek Janiszewski
• Turning a Specific Solution into a General Tool tutorial
  Having written a “call-me-later” class for a specific use case, this post generalizes it for any need. 
  Jim Gay
• An Easier Way to Think About `self` tutorial
  self is fundamental to understanding Ruby. Or To thine Ruby’s ‘self’, be true. 
  Starr Horne
• Elixir for Rubyists: A Gentle Introduction tutorial 
  Ben Smith
• Why Rails Developers Should Learn React opinion 
  Hrishi Mittal
• 3 Database Architectures for a Multi-Tenant Rails App opinion
  One database per tenant vs one group of tables per tenant vs a shared schema for tenants. 
  RubyGarage
• The smartest way to detect and diagnose errors in your Rails apps tools
  Automatic Ruby error monitoring helps you prioritize and fix critical bugs and improve your user’s experience. 
  Bugsnag   Sponsored
• StateInspector: Observe and Report State Changes code
  Can fully inform on object method calls and parameters as well as instance variables before and after. 
  Daniel P. Clark
• cljs-rails: A ClojureScript Integration for Rails Inspired by webpack-rails code
  ClojureScript is a Clojure to JS compiler, well suited for functional programming. 
  Bogdan Dumitru
• TTY: The Ruby Terminal App Toolkit code
  A collection of libraries that offer a fluid interface to creating command line clients. 
  Piotr Murach
• Underlock: Dead Simple Encryption and Decryption for Your Data from Ruby code 
  Metaware Labs
• Spicy::Proton: Generate Random English Adjective-Noun Word Pairs code 
  Chris Schmich
• Flutterby: A Flexible, Ruby-Powered Static Site Generator code
  Use Markdown, Sass, Slim, etc. Add JSON, YAML or TOML data files and render it all to HTML. 
  Hendrik Mans