Good article that tells you how to change behavior of certain keys via xmodmap (with the help of exv if you need to find out the keycode).

New WYSIWYG editor that claims to be lighter and prettier than TinyMCE and CKEditor. Has some Rails integration, too.

No chance you would have ever guessed it...

sudo palimpsest

As Bill Dueber has on his blog, you can call rvm in the shebang to select a Ruby version like this:

 #!/usr/bin/env rvm 1.9 do ruby

Standard arguments to do apply, see $> rvm help do.

Back in the old days, we couldn't do something like that:

.foo {
  position: absolute;
  bottom: 0;
  /* This was bad: */
  left: 10px;
  right: 10px;
}

Why? Because IE5 and IE6 (which a majority of people used back then) failed horribly trying to render it.

I've now checked if this is still an issue with any browser that's not from the stone age. \
Turns out all is well -- except if you have to support IE6 and below, but then you're in some other kinds of trouble.

It works in all sane browsers, and Internet Explorer 7, 8...

Capybara drivers will usually delete all cookies after each scenario. If you need to lose cookie data in the middle of a scenario, you can do this:

browser = Capybara.current_session.driver.browser
if browser.respond_to?(:clear_cookies)
  # Rack::MockSession
  browser.clear_cookies
elsif browser.respond_to?(:manage) and browser.manage.respond_to?(:delete_all_cookies)
  # Selenium::WebDriver
  browser.manage.delete_all_cookies
else
  raise "Don't know how to clear cookies. Weird driver?"
end

If you want a widget for awesome that runs a command regularly (every X seconds) and puts the output into your awesome panel, this is for you.

Put the code below into your ~/.config/awesome/rc.lua. It supplies two methods:

• execute_command will run a command and return its output. Multiple lines will be joined into one line. The code is from the awesome wiki.
• widget_with_timeout is a method that takes a command to run and a timeout in secon...

To reset the position of split dividers, drag all the dividers out of the screen. Then turn off splitting and turn it on again.

You have multiple options:

1. Just don't have a type column. All STI magic will be disabled automatically.
2. If you have a type column but want to use it for something else (WAT?), you can set self.inheritance_column = :_non_existing_column in the class definition
3. (Untested) In the parent class, set self.abstract_class = true

This technique is useful to implement form models / presenters, where you want all the goodness of Ac...

In order to clone a git repository including all branches and tags you need to use two parameters when cloning the old and pushing to the new repository respectively:

git clone --bare http://example.com/old-repo.git
cd old-repo
git push --mirror http://example.com/new-repo.git

Of course, the URLs to your repository might look different depending on the protocol used, username required, etc.
For a user git using the git protocol, it could be git@example.com:repository-namespace/repository.git

When you need to find out in which kind of spec you are during run-time, it's definitely possible. It's a lot easier in RSpec 2+.

For example, consider this global before block where you'd want to run some code for specific specs only:

config.before do
  # stuff
  that_fancy_method
  # more stuff
end

RSpec 2+

If you want to run such a block for a specific type of specs, you can use filters:

config.before do
  # stuff
  # more stuff
end

config.before :type =...

Sometimes you need a piece of code to do something different for specs than for features. If you don't have separate environments, you can't check your Rails.env.

I managed to distinguish between specs and features by asking Capybara.

Note that this only works when you do not use Capybara in specs.

if defined?(Capybara) and Capybara.respond_to?(:current_driver)
  # you're in a Cucumber scenario
else
  # you're probably in a spec
end

You could omit the defined?(Capybara) condition, if you are sure that Capybara...

This post claims they do.

git shortlog -s -n [commit-range]

-n, --numbered
Sort output according to the number of commits per author

-s, --summary
Suppress commit descriptions, only provide commit count

[commit-range]
E.g. $tagname.. for "everything after that tag"

Example output for spreewald:

60  Tobias Kraze
12  Henning Koch
 7  Dominik Schöler
 6  Thomas Eisenbarth
 5  Martin Straub
 3  Minh Hemmer
 2  Alex McHale
 1  Manuel Kallenbach
 1  Andreas Robecke

#...

Note: These instructions are for a quick per-project setup and may require you to change code. If you generally need SSL for development, you probably want to use Passenger.

1. Create a directory .ssl in your home directory. Go there and create a self-signed certificate. It is important to enter localhost.ssl as Common Name when asked. This is to mak...

Option 1: Creating a self-signed certificate with the openssl binary

As igalic commented on this gist.

openssl req -new -newkey rsa:2048 -sha256 -days 365 -nodes -x509 -keyout server.key -out server.crt

Explanation

req -new

Create a new request ...

-newkey

... using a new key ...

rsa:2048

... of type RSA, 2048 bits long.

-sha1

Make sure to use SHA1 as this certificate's hashing algorithm,

-nodes

don't encrypt the key and

-x509

...

ActiveRecord translations live in locale.activerecord. ActiveModel translations live in locale.activemodel. To use the same translations for both, use YAML references with & and *:

de:

  models: &models
    user: 'Benutzer'

  attributes: &attributes
    user:
      email: 'E-Mail'
      
  errors: &errors
    format: ! '%{attribute} %{message}'
    messages:
      accepted: muss akzeptiert werden
      blank: muss ausgefüllt werden
      # ...
      
  activerecord:
    errors: *errors
    models: *models
    attributes: *attr...

Getting a regular expression from a string in JavaScript is quite simple:

new RegExp('Hello Universe');
# => /Hello Universe/

You can also use special characters:

new RegExp('^(\\d+) users')
# => /^(\d+) users/

Our expression above now works only at the beginning of the matched string, looks for a number (\d+ [1]) and also captures that. Sweet.

However, mind that your input will not be magically escaped because of that:

new RegExp('makandra.com')
# => /makandra.com/

The above expression would match "`...

Issue this command:

sqlite3 ~/Library/Application\ Support/Dock/*.db "DELETE from apps WHERE title='APP_NAME';" && killall Dock

This tells sqlite3 to remove the app called APP_NAME from the Launchpad database and then kill the process called Dock, thereby restarting it.

This trick might be useful to implement more complicated directives in AngularJS. I needed it to do drag'n'drop in a hierarchical tree.

Let's say you have this $scope in your Angular controller:

$scope.tasks = [
  { 'text': 'Task 1' },
  { 'text': 'Task 2' }
]

And you have this template:

<ul ng-repeat="task in tasks">
  <li>
    {{task.text}}
  </li>
</ul>

Which renders this HTML:

<ul>
  <li>Task 1</li>
  <li>Task 2</li>
</ul>

If you'd like to access the scope bound to the second <li> you can say this in jQ...

When you want to do a git diff but do not care about the full diff and just want to know which files changed, use the --name-only switch:

$ git diff --name-only
app/controllers/sessions_controller.rb
app/models/user.rb
features/sign_in.feature

To include some brief information about changed lines, use the --stat switch:

$ git diff --stat
app/controllers/sessions_controller.rb |    8 +-
app/models/user.rb                     |   30 ++++
features/sign_in.feature               |  136 +++++++++++++++++

T...

Depending on where you live, different rules are used to determine the number of the week and a weekday. You have no chance whatsoever to get this right globally unless you make it your life's purpose. However, when you work for clients from Europe or the US, there are two dominantish standards you should know about. Each of these has subtle differences.

ISO 8601

• This is adhered to by most European countries.
• Weeks start on Mon...