This snippet illustrates following:

1. Using http request to get the data
2. Parsing RSS feeds
3. Sending email

I'm in the process of writing test fixtures for our rails site. A lot of my tests require authentication, so I've had to port our permissions system into a fixture. Rather than type out all of the information for the fixture, I decided to create a nested loop that will take care of this for me.

There's probably a rake task for this, but I wasn't able to find it, so I came up with my own solution. You'll have to do a little cleanup when it's done, however some slight mods to this loop could even eliminate that.

IP2Location is a Ruby library that enables the user to find the country, region, city, coordinates, zip code, ISP and domain name that any IP address or hostname originates from. It has been optimized for speed and memory utilization. Developers can use the API to query all IP2Location™ binary databases for applications written in C or supporting static/dynamic library.

Weighted random selection from the list.

Don't forget to call itemsChanged after updating list content.

This snippet illustrates using Genetic Algorithm for the hardware optimization.

how to remove a string from a plain text using just grep.

Customizable recursive directory scanner.

This code illustrates using ruby REXML package. It converts J2EE web application deployment descriptor web.xml into Freemind mindmap document.

Genetic Algorithm implementation.

See also "Weighted random selection" for RandomItemSelector class source.