Don't use should validate_format_of(...) because that matcher works in weird ways. Use the allow_value matcher instead:

describe Email, '#sender' do
  # > Rspec 3 should syntax
  it { should allow_value("email@addresse.foo").for(:sender) }
  it { should_not allow_value("foo").for(:sender) }
  
  # Rspec 3 expect syntax
  it { is_expected.to allow_value("email@addresse.foo").for(:sender) }
  it { is_expected.not_to allow_value("foo").for(:sender) }
end

Errors that may occur if you do use should validate_format_of(...):
...

rjb is a bridge software. It connects Ruby and Java.

Problem:

Keyboard layout reverting to US on (every) reboot

Cause:

I found the same problem, but only on my wife's account. I'd set her keyboard layout to UK through Gnome preferences and every time the US layout would reappear and be selected frustratingly.\
It turned out that on the gdm login screen her choice of keyboard layout in the discreet option bar at the bottom of the screen was set to US. That was then overriding the Gnome layout preference.

Solution:

Selecting the appropriate keyboard layout on the next login solved the...

the best damn presentation software a developer could ever love

You can write regular expressions some different ways, e.g. /regex/ and %r{regex}. For examples, look here.

Remember that it is always a good idea to match a regex visually first.

Characters

Literal Characters

[ ] \ ^ $ . | ? * + ( )

Character Classes

[ae]            matches a and e, e.g. gr[ae]y => grey or gray => but NOT graay or graey
[0-9]  ...

jamesgolick / resource_controller at Github

module ResourceController
  module Actions
    
    def index
      load_collection
      before :index
      response_for :index
    end
    
    def show
      load_object
      before :show
      response_for :show
    rescue ActiveRecord::RecordNotFound
      response_for :show_fails
    end

    def create
      build_o...

popthis is awesome when used with inaction_mailer.

Setup inaction_mailer

Install the gem:
sudo gem install popthis

Start the server:
popthis tmp/sent_mails/ # e.g. the folder containing the .txt-mails generated by inaction_mailer

Now, configure your mail client as follows:
Server: localhost
Protocol: POP3
Port: 2220
Username: anything
Password: anything

To pause and send a task to the background
ctrl+z

to reactivate the task
fg

to run task in background
bg

to see a list of so running tasks
jobs

The following example is from the Cucumber wiki:

Given a blog post named "Random" with Markdown body
  """
  Some Title, Eh?
  ==============
  Here is the first paragraph of my blog post. Lorem ipsum dolor sit amet,
  consectetur adipiscing elit.
  """

That multi-line string will be given as the last block argument in your step definitions:

Given /^a blog post named "([^\"]*)" with Markdown body$/ do |title, markdown|
  Post.create!(:title =...

Use the attached initializer to do stuff like this

str = "abc"
str.imbue(:foo => 'foo value', :bar => 'bar value')
puts str.foo # 'foo value'
puts str.bar # 'bar value'

So you screwed up and copied Paperclip secrets from one project to another. Here is a semi-automatic, painful way to migrate your existing attachment files to new locations.

You need to follow this step by step, do not just copy the whole thing into the console!

# 1. Get old paths by doing something like this on the console:
old_paths = ModelWithAttachment.all.collect { |m| [m.id, File.dirname(m.image.path(:original)).gsub(/original$/, '') ] if m.image.file? }.compact.uniq

# 2. Now change the Paperclip secret on the co...

Capybara does not play nice with sites that have some actions protected by SSL, some not. A popular way to implement this in Rails is using the ssl_requirement plugin by DHH, which redirects a requests from HTTP to HTTPS if the requested action requires SSL and vice versa.

Capybara follows the redirect, but seems to forget the changed protocol for the next request. The only hack-free workaround right now is to use URLs in lieu of paths everywhere (links, form actions).

For a hackful fi...

The following counts all the lines in all *.rb files in the app directory. Run several of these commands to get a rough estimate of the LOC.

find app -name *.rb -exec wc {} \; | awk '{a+=$1;print a}' | tail -1

Show all sockets (Unix & TCP/UDP), both listening and established ones:
netstat -anp

To limit the output e.g. to listening TCP sockets:
netstat -anp | grep tcp | grep LISTEN
...
tcp 0 0 0.0.0.0:3000 0.0.0.0:* LISTEN 28683/server
...

This means: A tcp v4 socket listening on port 3000 on all IP adresses (0.0.0.0 is synonym to 'all interfaces on the machine').

The last column includes the PID, kill -9 28683 should exit the process and clean up the socket.

traits.js is a minimal, standards-compliant trait composition library for Javascript.

YARD 0.6 adds the ability to serve documentation for gems as well as the current project with yard server. Just like gem server in RubyGems, you can serve gem docs. The advantage to YARD’s server is that you don’t need to pre-generate the static docs (with a gem install) before running the server. If you installed your gem with --no-rdoc, YARD will just generate it on the fly!

The following Sass will do it:

hr
  color: #ddd
  background-color: #ddd
  border: none
  height: 1px

Ruport’s acts_as_reportable module provides support for using ActiveRecord for data collection. You can use it to get a Ruport::Data::Table from an ActiveRecord model. This cheatsheet covers the basic functionality of acts_as_reportable and some common use cases.

When doing a query like this:
SELECT id FROM users WHERE (users.id IN (899,1084,1095,100,2424,2429,2420))

the order of the returned records is undefined. To force the query to return the records in a given order, you have to add ORDER BY FIELD(id, 899, 1084, ...)

So the query looks like this:
SELECT id FROM users WHERE (users.id IN (899,1084,1095,100,2424,2429,2420)) ORDER BY FIELD(id,899,1084,1095,100,2424,2429,2420);

Rails 3.0 has been underway for a good two years, so it’s with immense pleasure that we can declare it’s finally here. We’ve brought the work of more than 1,600 contributors together to make everything better, faster, cleaner, and more beautiful.

Try our Apify gem which solves many problems you will be having.

DENVER--(BUSINESS WIRE)--MPEG LA announced today that its AVC Patent Portfolio License will continue not to charge royalties for Internet Video that is free to end users (known as “Internet Broadcast AVC Video”) during the entire life of this License. MPEG LA previously announced it would not charge royalties for such video through December 31, 2015 (see http://www.mpegla.com/Lists/MPEG%20LA%20News%20List/Attachments/226/n-10-02-02.pdf), and today’s announcement makes clear that royalties will continue not to be charged for such video beyond...

PaintbrushJS is a lightweight, browser-based image processing library that can apply various visual filters to images within a web page.

String manipulation extensions for the Underscore.js javascript library.