gistfile1.rb

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

url = 'http://www.asahi.com/'
text = String.new
nokogiri = Nokogiri::HTML.parse(open(url))
li = nokogiri.xpath('//div[@id="HeadLine"]/ul[@class="Lnk FstMod"]/li[1]/a')
nokogiri = Nokogiri::HTML.parse(open(url + li[0].attribute('href')))
nokogiri.xpath('//div[@class="BodyTxt"]/*').each do |body|
  text = text +  body.text
end
text.gsub!(/\n/,'')

mecab = MeCab::Tagger.new("-Owakati")
data = Array.new

mecab.parse(text + "EOS").split(" ").each_cons(3) do |a| 
  data.push h = {'head' => a[0], 'middle' => a[1], 'end' => a[2]}
end

t1 = data[0]['head']
t2 = data[0]['middle']
new_text = t1 + t2  
while true
  _a = Array.new
  data.each do |hash|
    _a.push hash if hash['head'] == t1 && hash['middle'] == t2
  end 

  break if _a.size == 0
  num = rand(_a.size)
  new_text = new_text + _a[num]['end']
  break if _a[num]['end'] == "EOS"
  t1 = _a[num]['middle']
  t2 = _a[num]['end']
end

puts new_text.gsub!(/EOS$/,'')