Publish/subscribe for Ruby classes. Bonus: You do not have to declare events before using them.
I had a huge MySQL dump that took forever (as in: days) to import, while I actually just wanted to...
There seems to be no way to use therubyracer -v '0.11.4' and libv8 -v '3.11.8.17' on OS X Mavericks.
Rbenv won't compile REE 2011.03 properly on Ubuntu 12.04, failing with an error in tcmalloc.cc. If you want to...
We have released Modularity 2. It has many incompatible changes. See below for a script to migrate your applications automatically...
When you do something like this in your code: def var_value @var ||= some_expensive_calculation end
Opal is a source to source ruby to javascript compiler, corelib and a runtime implementation that currently passes 3000 rubyspecs...
If you want to sort a Ruby array with a primary, secondary, etc. criterium, use a sort_by that contains...
On recent/fresh installations of Ruby 1.8.7 you may encounter this error why calling any bundled binary (or just bundle exec...
We've since created ActiveType which has a restricted subset of Virtus' features. It might be enough for your needs...
When a Ruby block or proc takes multiple parameters, and you call it with an Array, Ruby will unexpectedly splat...
An annoying part of using font icons is that the icons usually need to live in the DOM. This is...
In Ruby, classes and modules are called constants. This card explains how Ruby resolves the meaning of a constant.
Modern IRB has time measurement built in. measure # Enable measure :off # Disable Custom Should your version of IRB not offer...
Assert rmagick provision ... Gemfile gem 'rmagick', '2.13.2' # at this moment the latest stable version config/initializer/carrierwave.rb require 'carrierwave/processing/rmagick' ... and define a...
What Rails version Within before_* Within after_* Cancel later callbacks Rails 1-4 return false return false Cancel later callbacks...
If you're still working on ruby 1.8, you should know that using SimpleDelegator is often prohibitively slow. I have...
Ruby publishes security issues and MRI updates on ruby-lang.org. Unfortunately there is no straight-forward way to subscribe to these...
Ubuntu 12.04 LTS x64, Ruby 1.8.7, Rails 2.13, PDFKit 0.5.4, Phusion Passenger Apache 2 I ran into this, when I...
After reading, you will know why and how runners.each(&:run) works. Here some tidbits: & can be quite confusing because it...
Today I ran into trouble installing therubyracer on Ruby 1.8. The installation failed with *** extconf.rb failed *** Could not create Makefile...
You're better off using debugger-ruby_core_source: gem install debugger-ruby_core_source If you can't do...
It is good programming practice to Don't Repeat Yourself (or DRY). In Ruby on Rails we keep our code...