While it might seem trivial to implement an invoice that sums up items and shows net, gross and vat totals...
You've been there: A form cannot be submitted, but you don't see a validation error because the field...
Calling Time#utc, Time#gmt or Time#localtime will not create a converted copy. Instead these methods modify the receiving...
Note that converting from RGB to CMYK will usually degrade your colors because no exact mapping is possible. Anyway, this...
Linux provides a fix number of filesystem watches. If you have some greedy daemon (like dropbox) running, chances are it...
After updating Rubygems you see a wall of deprecation warnings like this: NOTE: Gem::SourceIndex#add_spec is deprecated, use...
Note that if you plan to downgrade Firefox because your Selenium tests broke after a Firefox upgrade, there is a...
Note that if you plan to freeze your Firefox versions because your Selenium tests break whenever Firefox updates, there is...
Sometimes the Rails helper #distance_of_time_in_words is using too much magic. When you need a time difference...
Pdfposter is a Python script that allows to convert large PDFs into a PDF with multiple pages that can be...
I recently browsed through the ActiveSupport code and found some nice stuff I did not know about: ActiveSupport::Callbacks
Consider this HTML: Even though the surrounding container defines a line-height, which vertically centers its inline elements, the check...
When the Ruby parser module of Ruby-GetText comes across a file in one of its search directories (e.g. lib/scripts...
Do you wonder which databases are actually taking up how much space but only have one huge ibdata1 in your...
Grep prints one line per match. To return the number if matches, use the -c switch: grep -c "something" filename...
This article from the FreeBSD Handbook suggests that editing /etc/rc.conf enables DHCP. Unfortunately, some times this seems not sufficient.
We have a big flat screen TV (Samsung LE46c650l1kxxu) in our conference room. Configuring it properly, we were encountering some...
Solarized is a sixteen color palette (eight monotones, eight accent colors) designed for use with terminal and gui applications. It...
Date::Performance is a gem that replaces various method in Ruby's Date class with fast C implementations. Unfortunately it...
Detecting if a Javascript is running under Selenium WebDriver is super-painful. It's much easier to detect the current...
Attached is a working config to deploy an application with Capistrano that needs to monitor Resque workers with God.
Vim allows recording a batch of commands as a macro. This is handy if you need to do the same...
The Capybara API is somewhat hard for parse for a list of methods you can call on a Capybara node...
tl;dr: Always have your attachment path start with :rails_root/storage/#{Rails.env}#{ENV['RAILS_TEST_NUMBER']}/. The directory where you...