How to use three url to make one url array. Use the same url for nokogiri - ruby

Question

I might be crazy, but I have been trying to gather all my favorite news sites and scrap them into one ruby file. I would like to use these sites to scrape headlines and hopefully create a custom page for my site. Now so far i have been able to scrape the headlines from all three site individually. I am looking to use all three url into an array and use Nokogiri just once. Can anyone help me ?
require 'nokogiri'
require 'open-uri'
url = 'http://www.engadget.com'
data = Nokogiri::HTML(open(url))
#feeds = data.css('.post')
#feeds.each do |feed|
puts feed.css('.headline').text.strip
end
url2 = 'http://www.modmyi.com'
data2 = Nokogiri::HTML(open(url2))
#modmyi = data2.css('.title')
#modmyi.each do |mmi|
puts mmi.css('span').text
end
url3 = 'http://www.cnn.com/specials/last-50-stories'
data3 = Nokogiri::HTML(open(url3))
#cnn = data3.css('.cd__content')
#cnn.each do |cn|
puts cn.css('.cd__headline').text
end

Answer 1

You might want to extract the loading of the document and the extraction of the titles into its own class:
require 'nokogiri'
require 'open-uri'
class TitleLoader < Struct.new(:url, :outher_css, :inner_css)
def titles
load_posts.map { |post| extract_title(post) }
end
private
def read_document
Nokogiri::HTML(open(url))
end
def load_posts
read_document.css(outher_css)
end
def extract_title(post)
post.css(inner_css).text.strip
end
end
And than use that class like this:
urls = [
['http://www.engadget.com', '.post', '.headline'],
['http://www.modmyi.com', '.title', 'span'],
['http://www.cnn.com/specials/last-50-stories', '.cd__content', '.cd__headline']
]
urls.map { |args| TitleLoader.new(*args).titles }.flatten