The handy method has_select?(field, :selected => text) does not behave as expected with Cucumber 0.10.2, Capybara 0.4.1.2 and Selenium 0.2.2. It may not recognize a select field if the selected option with the text has no value. If you don't have the possibility to upgrade these Gems, probably the best way to go is to distinguish the current Capybara driver:

Then /^"([^"]*)" should be selected for "([^"]*)"(?: within "([^\"]*)")?$/ do |value, field, selector|
  with_scope(selector) do

    # currently needed due to different behav...

The .ova file format is a tar file with a .ovf file inside.
tar xvf virtualboximage.ova

Delegating methods to other objects is often helpful but the syntax of both def_delegators and def_delegator is a complete mess that makes your code hard to read.

Consider these classes:

class Topic < ActiveRecord::Base
  def title
    "A title"
  end
  
  def category
    "Topic category"
  end
end

class Post < ActiveRecord::Base
  belongs_to :topic
  def_delegato...

A lightweight javascript date library for parsing, manipulating, and formatting dates.

You probably know about the possibility to tag scenarios in Cucumber to run your own piece of code before the actual scenario is run which looks like that:

@foo
Scenario: Do something
...

and you place the following snippet into support/env.rb:

Before('@foo') do
  puts "This is run every time a @foo tagged scenario is hit"
end    

You can tag RSpec examples like this:

it 'does something', :foo => true do
  ...
end

What you need is the following within the RSpec.configure do |config| block wit...

When your gems complain about invalid gemspecs and illformed requirements, it is most probably an error resulting from the transition from Syck to psych. To fix this:

1. go to your gemspec directory (e.g. /Library/Ruby/Gems/1.8/specifications/)
2. change #<Syck::DefaultKey:0x00000100e779e8> to = (equals sign) in each file that's complaining

You can change the color for text selection via CSS, using the ::selection and ::-moz-selection pseudo-elements.

Adding this to your Sass will make all text selections use a red background:

::selection
  background-color: #f00

::-moz-selection
  background-color: #f00

Unfortunately, those can't be combined into "::selection, ::-moz-selection". Doing so will have no effect.

REST Client is a nice, simple HTTP client library for Ruby.

When you do a simple GET request like that:

RestClient.get 'http://example.com/'

it will result in this request beeing sent to www.example.com:

GET / HTTP/1.1
Accept: */*; q=0.5, application/xml
Accept-Encoding: gzip, deflate
Host: www.example.com

The application/xml accept header might lead to unexpected results on your server. You can force REST Client to ask the server for default text/html that way:

RestC...

Preview email in the browser instead of sending it.

Don't you just hate to write Cucumber path helpers to be able to say this?

When I go to the user form for "foo@bar.de"               # goes to edit_user_path(User.find_by_anything!('foo@bar.de'))
When I go to the form for the user "foo@bar.de"           # goes to edit_user_path(User.find_by_anything!('foo@bar.de'))
When I go to the form for the user above"                 # goes to edit_user_path(User.last)
When I go to the project page for "World Domination"      # goes to project_path(Project.find_by_anything!('World Domination')
...

This is a very general introduction to MV* Javascript frameworks. This card won't tell you anything new if you are already familiar with the products mentioned in the title.

As web applications move farther into the client, Javascript frameworks have sprung up that operate on a higher level of abstraction than DOM manipulation frameworks like jQuery and Prototype. Such high-level frameworks typically offer support for client-side view rendering, routing, data bindings, etc. This is useful, and when you write a moderately complex Javascript ...

Copy the attached file to config/initializers/indent_string.rb and you can say

"foo".indent(4) # "    foo"

Note you will find many simpler implementations of this method on the Interweb. They probably won't do what you want in edge cases, fuck up trailing whitespace, etc. The implementation in this card has the following behavior:

describe '#indent' do

  it 'should indent the string by the given number of spaces' do
    "foo".indent(2).should == "  foo"
  end

  it 'should indent multiple lines line by line' do

...

We've made it easier to link other cards:

• You can now find a button Cite other card above the main text area
• Clicking this button lets you search for another card
• Clicking on a search result will paste a Markdown link into the text area

You can now add code blocks without indentation, by using triple-backticks:

```
Code block goes here.
```

When deploying code with Capistrano (depending on your configuration) at some point Capistrano tries to check out code from your repository. In order to do so, Capistrano connects to your repository server from the application server you're deploying to with SSH. For this connection you can use two SSH keys:

• the user's ~/.ssh/id_rsa [default]
• the very same key you used for connecting to the application server - forwarded automatically to the git repository.

If you prefer the second way, add this to deploy.rb:

ssh_options[:forwar...

To access files from another branch or past commit without doing a complete checkout, you can either use

git show branch:file
git show commit:file

to display, or check out the file into your working directory with

git checkout branch -- file
git checkout commit -- file

This error simply means you've overloaded a cookie. Hints for fixing:

Check if you're putting too much (e.g. @some_object.inspect) into

• the session
• the flash, as it is stored in the session

Imagine you have a piece of code that tries to send a request to a remote server. Now the server is temporarily not available and raises an exception. In order to re-send the request you could use the following snippet:

def remote_request
  begin
    response = RestClient.get my_request_url
  rescue RestClient::ResourceNotFound => error
    @retries ||= 0
    if @retries < @max_retries
      @retries += 1
      retry
    else
      raise error
    end
  end
  response
end

This sni...

Tooltips that are delivered through HTML attributes are encoded. Decode entities before checking for their presence.

Capybara:

Then /^there should( not)? be a(n encoded)? tooltip "([^"]*)"$/ do |negate, encoded, tooltip|
  tooltip = HTMLEntities.new.encode(tooltip) if encoded
  Then "I should#{negate} see \"#{tooltip}\" in the HTML"
end

Note

This step uses the htmlentities gem described in another card.

Ma...

Sometimes it might be helpful to have a version history for a gem, e.g. when you want to see if there is a newer Rails 2 version of your currently used gem.

At first you should search your gem at RubyGems. Example: will_paginate version history.

The "Tags" tab at GitHub might be helpful as well.

Ever seen this error when using Graticule?

Numerical argument out of domain - acos

Similarly to the to_sql problem for some edge cases, Graticule::Distance::Spherical.distance (and possibly those of Graticule's other distance computation classes) is subject to Float rounding errors.

This can cause the above error, when the arc cosine of something slightly more than 1.0 is to be computed, e.g. for the (zero) distance b...

The article gives a very short tutorial how to customize tabs and fields of CKEditor's dialogs.

If your git index for some reason becomes invalid, no need to worry.

Your index is corrupt when you see this error running usual git commands like git pull, git status, etc.:

error: bad index file sha1 signature
fatal: index file corrupt

Though it sounds bad, your changes are still there. Fix it by first removing the index file, then resetting the branch:

rm .git/index
git reset

You should be all good now.

To be safe, make a backup of .git/index before you delete it.

As Justin Carmony points out, Mac OS Lion changed its behavior towards DNS and the usage of /etc/hosts (it quite disregards this file).

This has several ugly effects, including:

• no matter how many Apache Virtual Hosts you've set up, you will only get the first (that is, the implicit default), and only by typing localhost into your browser
• the Passenger pref pane won't work any more (actually it does, but it has no effect)