The information in this card is only relevant for Rails 2.3-era apps. This note gives a quick introduction into...
Liquid Canvas is a JavaScript library which allows you to draw inside an HTML canvas element with an easy yet...
If you just upgraded to Bundler 10.0.10 you might get the following error when bringing up Rails: /usr/lib/ruby/1.9.1/psych.rb:148:in...
Note that you cannot currently use Ruby 1.9.2 with Rails 2 applications that use RSpec, so don't upgrade if...
PhantomJS is a minimalistic headless WebKit. It has fast and native support for various web standards: DOM handling, CSS selector...
Sometimes you can make your life easier by not allowing a record attribute to be changed after the record was...
ActiveRecord comes with a method touch which sets the updated_at timestamp to the current time. Unfortunately it also runs...
Specify these gem versions in your Gemfile: gem 'cucumber', '~> 1.3.0' gem 'cucumber-rails', '= 0.3.2' # max version for Rails 2
I don't like those buttons inside the header area of a message that Thunderbird 3 put there. Though the...
Cucumber scenarios that are tagged with @javascript so they run with Selenium are very slow. You might not want to...
If you plan to insert an existing PDF into a new LaTeX document that you will compile to PDF, you...
Merging .po-files with Git is painful. There have been attempts of making Git more clever when trying to merge...
The shell variable PS1 holds your bash prompt. You might want to change it to serve your needs best. Here...
Add deprecation warnings and their solution or link to available solutions. Global access to Rake DSL methods is deprecated. Please...
Type looking a little flabby? Overweight? Want to give it a kick in the pants? Take a look at some...
With SNI, you can have many virtual hosts with HTTPS sharing the same IP address and port, and each one...
If in your application your users pass along params that result in filenames, like invoices/generated?number=123. This could be...
Pie sometimes does not properly redraw elements upon changes. This often happens when the change comes from somewhere further up...
JavaScript Garden is a growing collection of documentation about the most quirky parts of the JavaScript programming language. It gives...
The attached RSpec matcher exist_in_database checks if a given record still exists in the database and has not...
Install OpenSSH Server: sudo apt-get install openssh-server To check if the server is running you should get no...
When you need to insert many records into the same table, performance may become an issue. What you can do...
We are maintaining some vintage projects with tests written in Test::Unit instead of RSpec. Mocks and stubs are not...
Depending on where you live, different rules are used to determine the number of the week and a weekday. You...