filter the clipboard with a regex

clip.rb

module Kernel
  def pbpaste
    `pbpaste`
  end

  def pbcopy(object)
    IO.popen('pbcopy', 'w') { |pb| pb << object.to_s }
  end

  def pbfilter(filter)
    pbcopy pbpaste.split("\n").select{|l| l =~ filter }.join("\n")
  end
end