gistfile1.rb

 puts "Adding #{size = feed.entries.size} entries"
  feed.entries.each { |entry| title_to_entries[entry.title] = entry }
  start += size
end

ignored_phrases = ["View my other apartments", "American Realty Pros"]

title_to_entries.reject! do |title, entry|
  ignored_phrases.any? { |phrase| entry.summary.include?(phrase) }
end

image_hashes = []

title_to_entries.each do |title, entry|
  entry  = Nokogiri::HTML(entry.summary)
  images = entry.css('img').map { |element| element['src'] }

  images.each_with_index do |image, index|
    begin
      open(image) do |f| 
        File.open("whatever_file_#{index}.jpg","w") do |file|
          image_hashes << Digest::SHA1.hexdigest(f.read)
        end 
      end 
    rescue
      puts "error reading image"
    end 
  end 
end

p image_hashes