gistfile1.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'open-uri'
require 'nokogiri'

class Array
  module RegexpIndexing
    def [] a
      a.is_a?(Regexp) ? select {|b| b.is_a?(String) && b[a]} : super
    end
  end

  def with_rx
    self.class.ancestors.include?(RegexpIndexing) ? dup : dup.tap {|s|s.extend(RegexpIndexing)}
  end
end

doc = Nokogiri::XML.parse(open("http://www.8bitpeoples.com/feed/feed.rss"))
links = doc.xpath("//link").map {|link| link.content}
albums = links.with_rx[/discography/].map {|link| link[-6..-1]}

print albums.join("\n") + "\n"