Ruby 2.4.1 Released: What’s Changed
I’m going to quickly run through what’s different compared to Ruby 2.4.0 and why you should consider upgrading (or not). I’ve tried to put things into a rough order of priority or personal interest. Most of the changes are fixes for regressions, with the Onigmo regular expression engine update introducing the only new “feature” I could find. Ch-ch-changesOnigmo, the regular expressions library and
The New ‘Absent Operator’ in Ruby’s Regular Expressions
A slide from possibly the most intimidating slidedeck I’ve seen so far in 2017.Ruby 2.4.1 was released this week and included an upgrade to its underlying regular expression engine, Onigmo. The headline feature in this update was support for ‘the absent operator’ but what is this and what is it for? An issue on the Onigmo repository about the absent operator pointed to a 2007 Japanese academic pap
How to detect image contents from Ruby with Amazon Rekognition
Rekognition is a new Amazon Web Service that “makes it easy to add image analysis to your applications.” It can detect faces and objects, and even let you store libraries of faces for future recognition. If you’ve ever used an AWS service from Ruby before, doing some simple image rekognition (sic) is straightforward. Create a .env file with your AWS credentialsAWS_REGION=us-east-1 AWS_ACCESS_KEY_I
awesome_print: A New Pretty Printer for your Ruby Objects
Ruby Weekly is a weekly newsletter covering the latest Ruby and Rails news. awesome_print is a Ruby tool that provides "pretty printing" support for your objects. It's a bit like p, pp or, if you prefer, puts obj.inspect, but with significantly improved, contextual, colored output. Its creator and maintainer is Michael Dvorkin of Fat Free CRM fame. Being able to see "inside" Ruby objects on the fl
Ruby 1.9 Fibers + EventMachine for Big Ruby Webapp Performance Gains
Ruby Weekly is a weekly newsletter covering the latest Ruby and Rails news. Developers hankering for more performance from their Rack and Rails applications are using Ruby 1.9 fibers and event-based EventMachine-driven libraries as a way to boost the performance of their applications - in opposition to scaling by merely running multiple processes or using threads. It's no secret that thread-based
A MiniTest::Spec Tutorial: Elegant Spec-Style Testing That Comes With Ruby
Ruby Weekly is a weekly newsletter covering the latest Ruby and Rails news. Despite RSpec's awesomeness, Test::Unit remains the most popular Ruby testing tool out there outside of Rails apps. I've recently been code walking through a lot of Ruby libraries for my Ruby Reloaded course and the typical arrangement is Test::Unit, sometimes coupled with Shoulda or Contest for some extra syntactic sweetn
Ruby CheatSheet
Ruby Weekly is a weekly newsletter covering the latest Ruby and Rails news. Ruby is an easy language to learn, but it's often necessary to look up something we've forgotten. A combination of Google plus any Ruby books we have on our shelves can help, but sometimes it's handy to refer to a simpler set of notes - such as a "cheat sheet." This post attempts to cover the most interesting ones. The ide
What Ruby’s ||= (Double Pipe / Or Equals) Really Does
Ruby Weekly is a weekly newsletter covering the latest Ruby and Rails news. In Rubyists Already Use Monadic Patterns, Dave Fayram made a passing reference to using ||= to set a variable's value if its value were 'Nothing' (false or nil in Ruby). The resulting Reddit quickly picked up on his definition (which was fixed later) and argued about ||='s true meaning which isn't as obvious as many Rubyis
DHH Offended By RSpec, Says Test::Unit Is Just Great
Ruby Weekly is a weekly newsletter covering the latest Ruby and Rails news. As an outspoken and opinionated guy, David Heinemeier Hansson (a.k.a. DHH), creator of Rails, is no stranger to a little bit of controversy. He frequently sets off interesting debates on Twitter from his @dhh account. The latest is, perhaps, the most involved yet and has been rattling on for a couple of hours today. So wha
Net::HTTP Cheat Sheet
Ruby Weekly is a weekly newsletter covering the latest Ruby and Rails news. Norwegian Rubyist August Lilleaas has been busy putting together a ton of examples of using the Net::HTTP Ruby library that comes with most Ruby distributions. I asked him if it'd be okay to put some of them directly on Ruby Inside for reference purposes and he said "No problem!" It's worth noting that Net::HTTP has been s
19 Rails Tricks Most Rails Coders Don’t Know
New to Rails 3? Check out the Ruby on Rails 3 Tutorial book and screencast. A book and screencast series showing you how to develop and deploy industrial-strength Rails apps in a direct, step by step way. The screencast series includes 12 lessons over more than 15 hours! Get the best "over the shoulder" experience of following what a top Rails 3 developer does when building an app today. Click her
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