This is non-trivial because you need to fake event objects and require different code for different browsers. Luckily, there is tool support for most types of events.

In jQuery you can say:

$('a#close_window').click();

In Prototype you can use event.simulate.js from the Protolicious library to say:

$$('a#close_window')[0].simulate('click');

To trigger custom events with Prototype, you can use the [built-in Element.fire()](http://api.prototypejs.org/dom/...

Added utility methods for the Prototype Javascript framework.

When using an odd value for line-height in CSS the result will vary across all major browsers.\
Use an even line-height whenever possible.

When you are styling block elements you often apply both height and line-height to them. This Sass mixin helps you out with odd heights by always setting an even line height:

=height($height)
  height: $height
  line-height: floor($height / 2) * 2

So when you call +height(19px) in Sass this will be the resulting CSS:

height: 19px
line-...

When you use will_paginage to paginate a scope, and you want to obtain the total number of records matched before pagination, you can use total_entries:

users = User.active.paginate
puts users.count # number of records on this page, e.g. 50
puts users.total_entries # total number of records before pagination, e.g. one billion trillion

This will trigger a second database query in order to retrieve the count (which will run anyway if you render any kind of pagination widget).

`wil...

If your pidgin IM fails to connect to ICQ, you may need to update it. The ubuntu default sources are usually outdated.

Just follow the instructions 1-4 and 1-3 on the page linked below.

Making SSL connection work

If you can not connect using SSL, open up the account settings and enable "clientLogin". Also, your Server should be set to slogin.icq.com.

This document describes an agreement between web servers and search engine crawlers that allows for dynamically created content to be visible to crawlers. Google currently supports this agreement. The hope is that other search engines will also adopt this proposal.

There is a problem with AJAX response handling for Rails 3 remote links and forms in Internet Explorer. This problem affects applications still using jQuery 1.4.2.

This will stash all modifications that you did not git add:

git stash -k

Note that newly created (and non-added) files will remain in your working directory unless you also use the -u switch.

git stash -k -u

Also, your working directory must be clean (i.e. all changes need to be added) when you git stash pop later on.

Fixes all Flash elements on a page so that they heed DOM stacking order

You most likely never want to do this. But if you do:

Model.update_all({:id => new_id}, {:id => old_id})

To only run the next two migrations:

rake db:migrate STEP=2

To revert the previous two migrations:

rake db:rollback STEP=2

To revert the last two migrations and then migrate to the most current version:

rake db:migrate:redo STEP=2

To migrate to a given migration number, regardless of whether that means migrating up or down:

rake db:migrate VERSION=20100627185630

To migrate exactly one individual migration out of the sequence* (careful):

rake db:migrate:up VERSION=20100627185630

To revert exactly one individual m...

The following initializer provides an :alias => "my_route_name" option to restful routes in your route.rb. This simply makes the same route also available under a different ..._path / ..._url helpers.

For example,

map.resources :notes, :alias => :snippets

Gives you

notes_path, notes_url, new_note_path... #as always
snippets_path, snippets_url, new_snippet_path... #from the alias

Put this into an initializer:

If you need to revert only parts of one or several commits the following workflow can help:

If you need to revert multiple changes, make a branch and squash it afterwards.

For every commit you need to revert, starting at the most recent, do:

git revert -n [COMMIT] #revert, but don't automatically commit
... #fix any conflicts
git reset #unstage all changes
git add -p #this will ask you for every change, whethe...

git diff commit_hash -- path/to/file

Provide any commit hashes or branch names like "master" for commit_hash.

To install webmock 1.5.0:

sudo gem install webmock --version "=1.5.0"

or
sudo gem install webmock -v "=1.5.0"

As a user of Bundler you have spent significant time looking at this message:

Fetching source index for http://rubygems.org/

To make Bundler skip this index update and only use installed gems, you can use the --local option:

bundle install --local

Unfortunately this does not work with bundle update.

It is said that Bundler 1.1 will use a feature of Rubygems.org that allows partial index updates. Hopefully the wh...

Regular spaces and non-breaking spaces are hard to distinguish for a human.
Instead of using the   HTML entity or code like " " # this is an nbsp, use a well-named helper method instead.

def nbsp
  [160].pack('U*')
end

160 is the ASCII character code of a non-breaking space.

Given this class:

class Foo
  class Bar
  end
end

If you want to clean up this code with the modularity gem, you might try something like this:

class Foo
  does 'bar'
end

module BarTrait
  as_trait do
    class Bar
    end
  end
end

Note that this changes Bar's full class name from Foo::Bar to BarTrait::Bar. If you have methods inside Foo (or other classes), you would have to change all references accordingly, which is quite unpleasant.

You can solve it like that:
`...

This is a bash script for those of you who need to install all gems for all projects (e.g. to get started quickly on a newly installed system).

Put it into your ~/bin/ and run it from the directory that holds your projects.

Note that, like the vanilla bundle install, this will fail whenever a new gem compiles native components and requires a missing system dependency.

Use this scope:

class Stick
  named_scope :shuffled, lambda {
    last_record = last
    { :conditions => [ 'id >= ?', rand(last_record.id) ] } if last_record
  }
end

You can now pick a random stick by saying

Stick.shuffled.first

Or, if you prefer something smaller:

class Stick
  named_scope :shuffled, :order => 'RAND()'
end

Note however that you should never order by RAND() on tables that may become large some day, as this performs horribly and can kill your database server.

This note describes a Cucumber step definition that lets you test whether or not a CSS selector is present on the site:

Then I should see an element "#sign_in"
But I should not see an element "#sign_out"

Here is the step definition for Capybara:

Then /^I should (not )?see an element "([^"]*)"$/ do |negate, selector|
  expectation = negate ? :should_not : :should
  page.send(expectation, have_css(selector))
end

Here is the step definition for Webrat:

Then /^I should (not )?see an element "([^"]*)"$/ do |negate...

• Ctrl + R Search commands you entered previously. Press Ctrl + R again to search further back, Ctrl + Shift + R searches forward again.

• Ctrl + W Deletes from the cursor position to the left.

• Ctrl + _ Undo. Yes, this also works with a German keyboard layout.

• Ctrl + L Clear screen.

• Ctrl + D _Close shell. (EOT, just like in many other shells.) Note: if you dove into another shell (e.g. with sudo su username) you will close it and return to ...

Compresses JavaScript.