This week's Ruby news, issue 331

Jobs

• Senior Software Developer - Liberty Mutual Insurance (King of Prussia PA, USA)Do you have a wide skillset and specialize in Ruby on Rails? We're looking for someone to work on a variety of rapidly-adapting missions that will be innovative, new to the industry, using the best technology available. Liberty Mutual Insurance
• Senior Software Developer – Liberty Mutual Insurance (Seattle, WA, USA)Specialize in Ruby on Rails? We're looking for someone to work on a variety of missions including a SAFe Agile Methodology with intensive testing efforts, automation and working with User Experience designers. Liberty Mutual Insurance

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

In brief

• Strange Behavior with '_' (underscore) in IRB tutorial
  If you don’t know what _ does, it’s worth knowing. 
  Stack Overflow
• Building a Dynamic Instrumentation Agent for Ruby tutorial 
  Jean-Baptiste Aviat
• RStream Processing of Shell Commands tutorial
  A look at different ways to handle the results of shell commands, optimizing for memory. 
  Maciej Mensfeld
• Learn Elixir with a Rubyist tutorial
  The second post (first post) in an ongoing series on Elixir from a Rubyist’s perspective. 
  João M. D. Moura
• Write Your Own Rack Middleware tutorial 
  Anjana Krishnan
• Indexing PDF for Searching tutorial
  Using Apache Tika and Algolia to parse, index, and search PDF files. 
  Omar Bahareth
• Your First Progressive Webapp on Rails tutorial 
  Ross Kaffenberger
• Provide Useful Errors From Your Rails API tutorial 
  Steven Petryk
• Use Pundit to Protect Your Rails API tutorial 
  Sergio Tapia
• How to Scrape Websites with Ruby and Mechanize tutorial
  I’ve been doing some of this lately and found this guide to preserving sessions useful too. 
  Tim Craft
• Estimating CPU Per Query With Weighted Linear Regression tutorial
  This ebook explains how a specialization of linear regression answers seemingly unsolvable database questions. 
  VividCortex   Sponsored
• How to (Temporarily) Use Any Gem in the Rails Production Console tutorial 
  Mauro Otonelli
• Daru: Data Analysis in Ruby tutorial 
  Alex Miller
• Switching from a PHP to a Ruby Stack without Downtime story 
  Fabien Penso
• It's Time to Go HTTPS-Only in Rails (with Let's Encrypt) opinion 
  Aaron Sumner
• Security and Static Code Analyzers video 
  Drifting Ruby
• Try Codeship Pro: Free CI with Native Docker Support tools
  Ship your Docker apps faster with Codeship Pro. Try our new free tier and get 100 free builds per month. 
  Codeship   Sponsored
• invisible_captcha: Unobtrusive Spam Protection for Rails code 
  Marc Anguera Insa
• terjira: A CLI Tool for Jira code 
  Jaehyun Shin
• Squib: A DSL for Prototyping Card Games code 
  Andy Meneely