datascrap.rb

require 'rubygems'
require 'nokogiri'
require 'open-uri'
require 'pry'


PAGE_URL= "http://annuaire-des-mairies.com/val-d-oise.html"
@root = "http://annuaire-des-mairies.com"

def get_the_email_of_a_townhal_from_its_webpage(url)
  doc = Nokogiri::HTML(open(url))
	doc.xpath('html/body/div/main/section[2]/div/table/tbody/tr[4]/td[2]').text
end

def get_all_the_urls_of_val_doise_townhalls
  info = []
  arr = []
  doc = Nokogiri::HTML(open(PAGE_URL))
  doc.xpath('//td/p/a/@href').each do |node|
    h = {}
    temp = node.text.sub(/^[.]/, @root)
    h["email"] = get_the_email_of_a_townhal_from_its_webpage(temp)
    info << h
  end

  doc.xpath('//td/p/a').each do |node|
    arr << node.text
  end

  n = 0
  info.each do |town|
    town["name"] = arr[n]
    n += 1
  end
  p info.reverse
end

get_all_the_urls_of_val_doise_townhalls