sample

nokogiriTest.rb

require 'open-uri'
require 'nokogiri'

URL = 'http://heavens-fox.blog.jp/'
html = open(URL) { |f| f.read }
doc = Nokogiri::HTML.parse(html, nil)

class BabymetalArticle
  def initialize(article)
    @title = article.css("h1.article-title > a").text
    @summary = article.css("div.article-body-inner").text
    @comments = article.css("li.article-comment-count > dl > dd >a").text.to_i
  end

  def put_console
    puts @title
    puts @summary
    puts @comments
  end
end

articles = doc.css("div.article-inner").map do |article|
  BabymetalArticle.new article
end

articles.each {|article| article.put_console}