stock_prices.rb

require "httparty"
require "nokogiri"

stock_code = ARGV[0]

url = "http://finance.yahoo.com/q?s=#{stock_code}"

response = HTTParty.get url

dom = Nokogiri::HTML(response.body)

name = dom.xpath('//*[@id="yfi_rt_quote_summary"]/div[1]/div/h2').first.content

stock_price = dom.xpath("//*[@id=\"yfs_l84_#{stock_code.downcase}\"]").first.content

prev_price = dom.xpath('//*[@class="yfnc_tabledata1"]').first.content

ask_price = dom.xpath('//*[@class="yfnc_tabledata1"]')[3].content

puts "#{name}'s stock is at #{stock_price}, but it was #{prev_price}."

puts "Asking: #{ask_price}"