MyFunnyDev

def dfs(node, value, queue)
  return false if node.nil?	
  return true if node.data == value
 
  queue.push node.right unless node.right.nil?
  queue.push node.left unless node.left.nil?	
 
  dfs(queue.pop, value, queue)	
end

class Node
  attr_accessor :left, :right, :data
end

class A
  @@foo = "class variable of the class A"
  @foo = "class instance variable of the class A"
 
  def instance_method
   @foo = "instance variable of the class A"
  end
 
  def self.class_method1
    # class variables are visible to and shared by the instance and class methods
    @@foo
  end
 
  def self.class_method2
    # class instance variables are visible to and shared by the class methods
    @foo
  end	
end
 
p A.new.instance_method # instance variable of the class A
p A.class_method1 # class variable of the class A
p A.class_method2 # class instance variable of the class A
 
class B < A
  @@foo = "class variable of the class B"
  @foo = "class instance variable of the class B"
end
 
p B.class_method1 # class variable in B
# class variable in A is overwritten by one in B !!!
p A.class_method1 # class variable in B
 
p B.class_method2 # class instance variable of the class B
# class instance variable in A is NOT overwritten by one in B !!!
p A.class_method2 # class instance variable of the class A

require 'rubygems'
require 'sanitize'
require 'anemone'
require 'open-uri'
require 'hpricot'
 
#otodom.pl
Anemone.crawl("http://otodom.pl/index.php?mod=search&act=searchResults&qid=46911208", 
{:storage => Anemone::Storage.PStore("crawl1.pstore")}) do | anemone |
 
  # filter out useless pages
  anemone.focus_crawl do |page|
   page.links.delete_if do |x|
    (x.to_s =~ /mod=search&act=searchResults&qid=/).nil? and
    (x.to_s =~ /[a-zA-Z]+-id[0-9]*\.html$/).nil?
   end
  end
 
  # process details pages
  anemone.on_pages_like(/[a-zA-Z]+-id[0-9]*\.html$/) do | page |
     doc = Hpricot(page.doc)
     price =  doc.at("//strong[@id='offerPrice']")
     location = doc.at("//dl[@class='stripeMe'] > dd")
     desc = doc.at("//div[@id='offerDesc'] > p")
     offer_no = doc.at("//div[@id='offerFoot'] p[@class='toLeft']/span/strong")
     created_at = doc.at("//div[@id='offerFoot'] p[@class='toRight']/span/strong")
     photos = doc.search("//div[@id='imageList']/p/a")
  end
end