For university I have to stay up-to-date with lecture documents. Since my university doesn't offer RSS feeds...
Framework to write command-line apps in Ruby. Comes with a nice way of processing parameter options, some utility classes...
When you have a complex recipe setup with multistage deployment you may run into this error: `role_list_from': unknown...
Scenario outlines allow us to more concisely express repetitive examples through the use of a template with placeholders.
When you use one line Ruby comments in ERB templates you should never do this (notice the whitespace in front...
The SQL code generated by Graticule's spherical distance computation is insufficient and can lead to NULL distances in edge...
I have a pair of headphones connected to my desktop's back panel and a headset connected to the front...
To use different Ruby versions on your computer you can use the Ruby Version Manager. It also allows you to...
If you get the above error when running tests in bulk (but not individually), it's actually the fault of...
"Classic" Excel (XLS) has a magic limit of 65535 rows per worksheet. This was fixed in XLSX but the version...
When you have objects in your database that hold latitude and longitude and you want to find others that are...
Instead of running all missing migrations on your test database with rake db:migrate RAILS_ENV=test you can also...
Forms with many inputs (600+ in my case) become extremely unresponsive on an iPad, up to the point where it...
ActiveSupport's memoize has a dangerous feature you might not know about. Assume you have class DeepThought extend ActiveSupport::Memoizable...
Two new methods on and off are the new way of declaring event handlers. bind, delegate and live area deprecated...
There are several options, but most of them are impractical. The best way is to use the :ruby filter:
After starting the Rails server in a freshly generated Rails 3.1 project you could see an error message such as...
Note: This applies specifically to MySQL. In PostgreSQL for example, this is not an issue. If you care about performance...
Look here for informations how you can show the MySQL default character set. At first you need the Amazon RDS...
Web fonts are awesome. After being restricted to Arial for two decades there is finally a cross-browser way to...
You must reconfigure the guest so it will get its own IP address: Shutdown the guest In the guest's...
By default, Rails views escape HTML in any strings you insert. If you want to insert HTML verbatim, you need...
Clearfix is a hack to clear floating elements without additional HTML markup. If you only need to support IE8 and...
When used to do: $> cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 4 model name : Intel(R...