If you want to know the exact hits on your website (or whatever logfile you want) for a specific date without duplicates, here's how.
"Unique" means you don't want to count hits to an URL originating from the same IP twice.

You can use the attached script to do so:

# ./log_parser.rb 2011-10-04

27 hits on /rss.xml
36 hits on /stylesheets/fonts/slkscr-webfont.woff
37 hits on /stylesheets/fonts/slkscrb-webfont.woff
37 hits on /images/bullet.png
38 hits on /images/download.png
38 hits on /images/play.png
39...

Since version 11.10 Opera provides support for linear gradients using -o-linear-gradient.

The syntax is pretty similar to Mozilla's -moz-linear-gradient. This will create a vertical gradient from yellow to red:

background-image: -o-linear-gradient(top, #ff0, #f00);

The first parameter defines where the gradient starts and which direction it will go. \
You can use top/left/bottom/right (and combinations of those) but also set any angle you like (0° being the left side, going counter-clock-wise):

background-image: -o-l...

The colors in Rails log files are helpful when watching them but, since they are ANSI color codes like ^[[4;36;1m, can be annoying when you are reading the logs with a tool that does just prints those control characters (like less or vim).

Remove them with sed:

cat staging.log | sed -r "s/\x1B\[([0-9]{1,3}((;[0-9]{1,3})*)?)?[m|K]//g"

This will print the log without colors to your terminal. You can pipe the result into less for example.

To have a file you can vim around with, just write that output into a new file:

ca...

The state_machine gem comes with a rake task that lets you generate PNG graphs from any model using state_machine.

Install the required dependencies like this:

sudo apt-get install graphviz
sudo gem install ruby-graphviz

You can now generate a graph like this:

rake state_machine:draw CLASS=ModelUsingStateMachine

Replace ModelUsingStateMachine with the name of your model class.

If it the raketask does not exist for you, add to Rakefile (in your pr...

There are many blog posts on encrypting backups, but none works for local drives.

#How to

• Encrypt the external backup drive using TrueCrypt or PGP or similar.
• Mount it. If possible, let this happen automatically.
• Tell Time Machine to use it for backup.

#What is NOT working

• Backing up to disk images as described in this blog post. Apparently, sparsebundle images & co. ar...

Microsoft provides virtual machine disk images to facilitate website testing in multiple versions of IE, regardless of the host operating system. Unfortunately, setting these virtual machines up without Microsoft's VirtualPC can be extremely difficult. These scripts aim to facilitate that process using VirtualBox on Linux or OS X. With a single command, you can have IE6, IE7, IE8 and IE9 running in separate virtual machines.

Did you check Copy to Projects Asset as ... and there is an existing file with the same name in your project folder?

Note that converting from RGB to CMYK will usually degrade your colors because no exact mapping is possible. Anyway, this Stackoverflow post worked for me:

gs -dSAFER -dBATCH -dNOPAUSE -dNOCACHE -sDEVICE=pdfwrite \
-sColorConversionStrategy=CMYK -dProcessColorModel=/DeviceCMYK \
-sOutputFile=output.pdf input.pdf

Consider this HTML:

<div style="line-height: 42px">
  <input type="checkbox" />
</div>

Even though the surrounding container defines a line-height, which vertically centers its inline elements, the check box will be top aligned if it is the only element inside the container.

It will be aligned correctly if the HTML looks like this:

<div style="line-height: 42px">
  <input type="checkbox" /> foo
</div>

Complex explanation here.

So the ac...

If you want to use the (badly implemented!) solarized color scheme in your Rubymine IDE:

1. Clone the IntelliJ IDEA port:

   git clone https://github.com/jkaving/intellij-colors-solarized.git

2. Import the settings in Rubymine by chosing the above directory File -> Import Settings

3. Change the color scheme in the settings (Ctrl-Alt-S) in Editor -> Colors & Fonts

Note that selecting a color scheme will also reset your previous editor font choice. You might want to change the font to [Envy Code R](http://damieng.com/blog/2008/05/2...

Solarized is a sixteen color palette (eight monotones, eight accent colors) designed for use with terminal and gui applications. It has several unique properties. I designed this colorscheme with both precise CIELAB lightness relationships and a refined set of hues based on fixed color wheel relationships. It has been tested extensively in real world use on color calibrated displays (as well as uncalibrated/intentionally miscalibrated displays) and in a variety of lighting conditions.

tl;dr: Always have your attachment path start with :rails_root/storage/#{Rails.env}#{ENV['RAILS_TEST_NUMBER']}/.

The directory where you save your Paperclip attachments should not look like this:

storage/photos/1/...
storage/photos/2/...
storage/photos/3/...
storage/attachments/1/...
storage/attachments/2/...

The problem with this is that multiple environments (at least development and test) will share the same directory structure. This will cause you pain eventually. Files will get overwritten and...

Don't simply test for the presence of the magic Paperclip attribute, it will return a paperclip Attachment object and thus always be true:

- if user.photo.present? # always true
  = image_tag(user.photo.url)

Use #exists? instead:

- if user.photo.exists?
  = image_tag(user.photo.url)

When your Cucumber feature needs to browse the page HTML, and you are not sure how to express your query as a clever CSS or XPath expression, there is another way: You can use all and find to grep through the DOM and then perform your search in plain Ruby.

Here is an example for this technique:

Then /^I should see an image with the file...

When you need to use diff in either some Ruby code or your Rails app, use the differ gem.

puts Differ.diff "foo", "boo"
# => {"boo" >> "foo"}

Usage

There are several variants available, all using the base method diff(to, from, separator = "\n").
You have diff_by_line, diff_by_word, diff_by_char and may of course use your own separator:

puts Differ.diff 'Hauptsatz, und mein Nebensatz.', 'Hauptsatz, und dein Nebensatz.', ','
# => Hauptsatz,{" und dein Nebensatz." >> " un...

When you have a program running in a hidden X screen (like with Xvfb for Selenium tests) you may want to look at that hidden screen occasionally.

First, find out what X displays are currently active:

netstat -nlp | grep X11

This should give you some results like these:

unix  2      [ ACC ]     STREAM     LISTENING     8029600  4086/Xvfb           /tmp/.X11-unix/X99
unix  2      [ ACC ]     STREAM     LISTENING     8616     -     ...

Below you can find the hex color codes for the Color Graphics Adapter palette which used to be popular in the 1980s.

$cga_black: #000000
$cga_white: #ffffff
$cga_light_gray: #aaaaaa
$cga_dark_gray: #555555
$cga_yellow: #ffff55
$cga_brown: #aa5500
$cga_light_red: #ff5555
$cga_dark_red: #aa0000
$cga_light_green: #55ff55
$cga_dark_green: #00aa00
$cga_light_cyan: #55ffff
$cga_dark_cyan: #00aaaa
$cga_light_blue: #5555ff
$cga_dark_blue: ...

VirtualBox does not offer anything for this task -- you need to do it yourself. It's not that hard:

Get more disk space

1. Add an extra virtual hard disk to the machine with the disk size you want to achieve.
2. Get a Linux live CD (like the Ubuntu live image) that offers fdisk, dd and gParted.
3. Boot the guest from the CD, open a terminal (on the guest, not the host!) and become root: sudo su
4. fdisk -l to see the disk information. \
   There should be one drive with some partitions and one without any....

Every time you open a directory containing images, Windows creates those pesky Thumbs.db files for a minor speed-up and lots of cluttering your zip files etc.

You do want to disable them. Here is how on Windows 7:

1. Start → Run (or press Meta+R)
2. gpedit.msc
3. User Configuration → Administrative Templates → Windows Components → Windows Explorer
4. Locate "Turn off the caching of thumbnails in hidden thumbs.db files" (should be one of the top list entries)
5. Set it to "Enabled". Yes, seriously -- you enable the disabling of thumbs.d...

Thunderbird 5 brings a custom chrome on Windows Vista/7 that uses translucent Aero decorations on toolbars and menubars. Here is how to restore solid backgrounds if you don't like it.

Put the following into chrome\userChrome.css in your Thunderbird profile directory:

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
window {
  background-color: -moz-dialog !important;
}

(Re-)start Thunderbird afterwards.

If you need more info on where the userChrome.css is suppose...

You probably need to activate X-Sendfile.

Sass comes with many built-in functions to manipulate color. Some of the more interesting functions include:

adjust-hue($color, $degrees)

:Changes the hue of a color.

lighten($color, $amount)

:Makes a color lighter.

darken($color, $amount)

:Makes a color darker.

saturate($color, $amount)

:Makes a color more saturated.

desaturate($color, $amount)

:Makes a color less saturated.

grayscale($color)

:Converts a color to grayscale.

complement($color)

:Return...

Install FreeBSD

• Download a suitable image from this site
• Select File > New… to and follow the instructions, choose the .iso file you downloaded as image file
• Start the new virtual machine and follow the instructions
  • formatting is a little complicated, so let freebsd.org help you

Install VMware Tools

Choose Virtual Machine > Install VMware Tools from the VMware menu, then as root:

^
# install required packages
pkg_add...