uname -m

i686 means 32-bit.

If you get an error like this ...

 can’t find executable rails for rails-3.2.3 (Gem::Exception)

... one of several things might be wrong.

1. You're using RVM

It's possible that you have a system-wide gem executable (like rails) that requires a gem that is not available in the current RVM Ruby or gemset. Check what Ruby you are using (rvm current) and look out for .rvmrc files in your current directory (which change your Ruby upon entering the directory).

2. You killed a gem install process
   ----------...

How to call routes, make requests and try out helpers from the Rails console.

OCRA (One-Click Ruby Application) builds Windows executables from Ruby source code. The executable is a self-extracting, self-running executable that contains the Ruby interpreter, your source code and any additionally needed ruby libraries or DLL.

ocra [option] script.rb

Will package “script.rb“, the Ruby interpreter and all dependencies (gems and DLLs) into an executable named “script.exe“.

Every time I started RubyMine, it opened the main window on the left monitor -- when moving it to the center monitor and closing it, the next time it still opened up on the left one.

Here is how I forced RubyMine to start up on a different screen:

1. Un-maximize the main window
2. Move it to your preferred monitor
3. Close RubyMine (keep it unmaximized)
4. Start RubyMine again.
5. You may now maximize your main window; the next time you start up RubyMine, it will open on the correct screen, maximized.

That's crazy!

DTAUS & DTAZV are formats for German bank transfers and is short for "Datenträgeraustausch". The format itself totally sucks because it was established in the last century, to be used on floppy disks. Still almost all German banks use it (they only seem innovative at robbing), and it is therefore supported in common banking programs too.

This gem saves you all the trouble when generating DTAUS- or DTAZV-text.

Our awesome collection of rspec helpers (formerly known as "spec_candy.rb") is now available as a gem. It works, it is tested and there will be updates.

Usage

Add rspec_candy to your Gemfile.

Add require 'rspec_candy/helpers' to your spec_helper.rb, after the rspec requires.

List of features

See on GitHub

Though the W3C even gives it as an example, no browser actually supports this CSS:

img:before {
  content: "something";
}

Browsers will simply not render anything when doing that on images (Fun fact: It worked in an older version of Opera but got dropped).\
The same applies to the :after pseudo-element.

This makes me sad.

You can try using jQuery instead.

Sometimes you need a special version of chrome because it has some features you need for testing, like in this card. You do not need to use that Version apart from tests, because you can tweek selenium to use a special version that you set in your environment:

# features/support/chrome.rb
require "selenium/webdriver"

Capybara.register_driver :chrome320x480 do |app|
  
  if driver_path = ENV["CHROME_SELENIUM_BIN...

You can set the resolution and user agent used in selenium tests with chrome with the method described in this card, but you can also set the accept-language and other profile settings if you do this:

# features/support/chrome.rb
require "selenium/webdriver"


Capybara.register_driver :chrome320x480 do |app|
  args = []
  args << "--window-...

File upload with nice UI, progress bar and preview, allowing multiple files and supports drag & drop.

Its default is built on Bootstrap, but there's a version for jQuery-UI.

It's not logical, so don't be too hard on yourself. You need to give it a height and change the box-sizing and display:

button
input[type="reset"],
input[type="button"],
input[type="submit"],
input[type="file"] > input[type="button"]
  display: inline-block
  box-sizing: border-box
  height: 20px
  line-height: 20px

Also see Proper cross-browser CSS styling for buttons.

When you want to test how an web-application reacts in a specific resolution, you can set up a specific Selenium driver for some tests:

 Before('@chrome320x480') do
     Capybara.current_driver = :chrome320x480
 end

 After('@chrome320x480') do
    Capybara.use_default_driver 
 end

You can use either chromium or chrome beta (as of 2012.05 the Version "19.0.1084.41 beta" works), or any other member of the family. It only needs to supports the "--window-size" command-line switch. [See this list](http://peter.sh...

The DOM window object provides access to the browser's history through the history object. It exposes useful methods and properties that let you move back and forth through the user's history, as well as -- starting with HTML5 -- manipulate the contents of the history stack.

If you get this:

p_elSource.attachEvent is not a function

... you need to disable Firebug or switch to another browser.

The closest is probably Nimbus Sans L, which is released under the GPL, AFPL, LPPL licenses. However, I couldn't find a way to convert Nimbus Sans L into a web font.

I finally settled with Liberation Sans, which is awesome for some reasons:

• Although it's available for free, it's a high quality font because its creation was thankfully sponsored ...

• Note that you are not allowed to embed any font in a website. You need to check the license first. Fonts from Font Squirrel are all okay to embed and use for commercial purposes, but as with many free fonts, quality differs widely, especially at medium and small font sizes.
• You will need to embed your font in several formats since browser support is a mess.
• You can use the [Font Squirrel @font-face generator](http://www.fontsquirrel.c...

In order to navigate through the browser history. you can manipulate the window.history object via javascript like follows:

When /^I go back in the browser history$/ do
  page.evaluate_script('window.history.back()')
end 

For further functions of the window and history objects check out this link.

An improved version of this step is now part of our gem spreewald on Github.

The result is a .ico file with multiple versions of your logo at different resolutions. Now, depending on the context, visitors to your site will see your nice favicon in their browser tabs, superimposed on whatever browser chrome they're using in all of its transparent glory.

This is for you when you want to mount a dmcrypt encrypted partition manually, e.g. from a live CD.

First, open the dmcrypted partition (You need to provide some name. It may, but does not need to, be your LVM group name):

cryptsetup luksOpen /dev/sda5 some_name

Since your encryption container most likely contains an LVM group (root + swap for example), enable the logical volume manager (replace LVM_NAME with your volume group's name):

vgchange -ay LVM_NAME

After that, you can your access (mount, [fsck](https://makandrac...

To force a check on your next reboot (here for your root partition), simply:

touch /forcefsck

To manually do this, here is how to do it for the first partition on sda, when you are using ext4:

fsck.ext4 -fn /dev/sda1

• -f forces the check, even if everything seems okay.
• -n is a "read only" check, where nothing is changed and every question is answered with "no".
• When using dmcrypt, you probably want to check s...

Spreewald gives you steps like these:

When I enter "text" into the browser dialog

Also see Accept or deny JavaScript confirmation dialogs in Capybara/Selenium.

Basic box shadow support is available in all browsers today, but you need to check to which extend they are supported. Implementations differ:

• Are multiple box shadows (separated by comma) possible?
• Are inset shadows possible?
• Can the spread radius be defined?
• Can you use it without vendor prefix?

A good compatibility chart can be found here. The gist is that, except for IE and some Safaris, you can use all features ...