You can seriously speed up deployments with Capistrano when using a local git repository on the server you are deploying...
Ruby comes with a class BigDecimal which you can use for arbitrary precision arithmetic. You should use BigDecimal instead of...
When storing floating-point numbers such as prices or totals in an SQL database, always use a DECIMAL column. Never...
When deploying an application with "cap deploy" by default [1] you only deploy your code but do not run migrations...
Airbrake (formerly Hoptoad) already ignores certain errors like InvalidAuthenticityToken by default (see Airbrake::Configuration::IGNORE_DEFAULT).\ To ignore additional classes...
Sass now comes with user-defined functions, keyword arguments, list manipulation. Haml and Sass are now two separate gems.
Awesome presentation for the new HTML5 features we will get to play with. This presentation should probably be viewed in...
You most likely have a form element inside another form element. Don't do that. Ever. Firefox and Chrome will...
Partials always define a local variable with the same name as themselves. E.g. when you are in _recent_users.html.erb, a local...
If you want to convert a README.rdoc file to HTML, say this from a shell: rdoc README.rdoc
ActiveRecord gives you the :include option to load records and their associations in a fixed number of queries. This is...
Reading a URL via GET: curl http://example.com/ Defining any HTTP method (like POST or PUT): curl http://example.com/users/1...
The Basic Authentication header encodes username and password. Effectively, it's just Base64 plus a "Basic" prefix.
It is common in Rails 3.0 applications that you want to provide default views for a group of controllers. Let...
I prefer using Opera's "User mode" to toggle an outlining of HTML elements quickly. This helps greatly when you...
If there is some weird margin at the top of your page for no apparent reason, chances are one of...
Within an event handler, there are multiple methods to cancel event propagation, each with different semantics. event.preventDefault() Only prevents the...
Google’s Font Directory and API for web fonts could have a transformative effect on how we read the web...
When you write a custom RSpec matcher a good place to store them is to create one file per matcher...
Back when Steak was first released, Capybara didn’t have any of the nice RSpec helpers it does now. A...
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...
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...