Cleanup stupid Safari bookmark duplication

clean.rb

require 'rubygems'
require 'nokogiri'

lines = File.open("Safari Bookmarks.html").readlines

urls = []
output = []

lines.each do |line|
  if line =~ %r(<DT><A HREF="(.+)">.+</A>$)
    unless urls.include? $1
      output << line
      urls << $1
    end
  else
    output << line
  end
end

File.open("output.html", "w") { |f| f.write(output.join) }