flavorjones/gist:79869

## gistfile1.rb
# in response to El_Matador, one way to search for regular expressions using Nokogiri

require 'rubygems'
require 'nokogiri'

value = Nokogiri::HTML.parse(<<-HTML_END)
  "<html>
    <body>
      <p id='para-1'>A</p>
      <p id='para-22'>B</p>
      <h1>Bla</h1>
      <p id='para-3'>C</p>
      <p id='para-4'>D</p>
      <div class="foo" id="eq-1_bl-1">
        <p id='para-5'>3</p>
      </div>
      <div class="bar" id="eq-1_bl-1">
        <p id='para-5'>3</p>
      </div>
    </body>
  </html>"
HTML_END

# my_block is given
my_bl = "1"
# my_eq corresponds to this regex
my_eq = "[0-9]+"
# full regex to search for in node ids
full_regex = %r(eq-#{my_eq}_bl-#{my_bl})

filter_by_id = Class.new do
  attr_accessor :matches

  def initialize(regex)
    @regex = regex
    @matches = []
  end

  def filter(node_set)
    @matches += node_set.find_all { |x| x['id'] =~ @regex }
  end
end.new(full_regex)

value.css("div.foo:filter()", filter_by_id)
filter_by_id.matches.each do |node|
  puts node
end
	# in response to El_Matador, one way to search for regular expressions using Nokogiri

	require 'rubygems'
	require 'nokogiri'

	value = Nokogiri::HTML.parse(<<-HTML_END)
	"<html>
	<body>
	<p id='para-1'>A</p>
	<p id='para-22'>B</p>
	<h1>Bla</h1>
	<p id='para-3'>C</p>
	<p id='para-4'>D</p>
	<div class="foo" id="eq-1_bl-1">
	<p id='para-5'>3</p>
	</div>
	<div class="bar" id="eq-1_bl-1">
	<p id='para-5'>3</p>
	</div>
	</body>
	</html>"
	HTML_END

	# my_block is given
	my_bl = "1"
	# my_eq corresponds to this regex
	my_eq = "[0-9]+"
	# full regex to search for in node ids
	full_regex = %r(eq-#{my_eq}_bl-#{my_bl})

	filter_by_id = Class.new do
	attr_accessor :matches

	def initialize(regex)
	@regex = regex
	@matches = []
	end

	def filter(node_set)
	@matches += node_set.find_all { \|x\| x['id'] =~ @regex }
	end
	end.new(full_regex)

	value.css("div.foo:filter()", filter_by_id)
	filter_by_id.matches.each do \|node\|
	puts node
	end