This must be one of the coolest, yet quite unknown, technique in Ruby. For certain types of problems (e.g. when...
In regular expressions you can use the zero-width pattern \b to match the beginning or end of a word...
How to create an infinitely nestable hash that always defaults to a new hash if a key does not map...
Ruby's net/http is setup to never verify SSL certificates by default. Most ruby libraries do the same. That means...
Sometimes, you just need to shoot from the hip…or deploy your local changes without committing them. Put this snippet...
If you want to find out whether a Class object is directly inheriting from another class, use superclass: ActiveRecord::RecordNotFound.super...
RSpec 1, RSpec 2 To test whether two arrays have the same elements regardless of order, RSpec 1 and 2...
Use the htmlentities gem. Encoding works like this: require 'htmlentities' coder = HTMLEntities.new string = "<élan>" coder.encode(string) # => "<élan>"
You can get YAML.load to instantiate any Ruby object by embedding the desired class name into the YAML code. E.g...
Use the Launchy gem: Launchy.open('http://www.ruby-lang.org/')
To temporarily change the current working directory in Ruby, call Dir.chdir with a block. The previous working directory will be...
The first thing you need to understand is that the purpose of refinements in Ruby 2.0 is to make monkey...
If you need to do calculations inside the database and can not use Ruby objects you may run into problems...
This card explains how to install RubyMine for the first time. If you want to upgrade an existing RubyMine installation...
Because Nokogiri needs to be compiled and dynamically linked against both libxml2 and libxslt, it has gained a reputation for...
When you just went through a long debug-fest and infested your code with dozens of debug messages, it can...
Occasionally some complex query must be processed on the database because building thousands of Ruby objects is impracticable.
Regular spaces and non-breaking spaces are hard to distinguish for a human. Instead of using the HTML entity...
Terminus is a Capybara driver where most of the driver functions are implemented in client-side JavaScript. It lets you...
Sometimes you inherit a non Rails or non Rack based web app such as PHP, Perl, Java / JEE, etc. I...
If you get an error message like that you are missing the Aspell files a specific language:
Hooks lets you define hooks declaratively in your ruby class. You can add callbacks to your hook, which will be...
This post will describe how I stumbled upon a code path in the Linux kernel which allows external programs to...
It can be useful to have a Ruby expression like condition ? positive_case : negative_case in MySQL queries: