copy an irb command to clipboard

example.rb

copy {
  puts "puts 'hello world'"
}

#command V

ep

irb_copy_paste.rb

    # thanks:
    # http://stefankst.net/2007/06/05/capture-standard-output-in-ruby/
    # http://judofyr.net/posts/copy-paste-irb.html
    # stick in .irbrc
    def copy(str=nil)
       if block_given?
         old_stdout = $stdout
         output_str = StringIO.new
         $stdout = output_str
         begin
            yield
         ensure
            $stdout = old_stdout
         end
         str=output_str.string
       end
       IO.popen('pbcopy', 'w') { |f| f << str.to_s } unless str.nil?
    end

    def paste
      `pbpaste`
    end

    def ep
      eval(paste)
    end