A partir de um link, navega aleatóriamente entre os outros links interessantes da Wikipédia.

wiki_bot.rb

require 'open-uri'

def html(wiki)
  open("http://en.wikipedia.org/wiki/#{wiki}", 'User-Agent' => 'bot').read
end

def links(html)
  html.scan(/<a href=\"\/wiki\/.+\" title=\"(\w+)\">/)[0].uniq
end  

def go(word)
  puts "Hey! Let's get something about #{word}."
  while word do
    if ways = links(html(word))
      print "\nShould I go into "
      ways.each {|way| print "#{way}, "}
      puts "or maybe just relax?" # random
      random = ways[rand(ways.size)]
      puts "#{random} sound good, come on..."
      word = random
    else
      puts "Opz! No more ways over here."
    end
  end
  puts "..."
end

go("Ocupation")