Simply execute perl code from ruby

perl.rb

require 'open3'

module Perl
  def self.exec(code)
    pstdin, pstdout, pstderr = Open3.popen3('perl')
    pstdin.write code
    pstdin.close
    data = pstdout.read
    err = pstderr.read
    if err.size > 0
      raise err
    end
    data
  ensure
    pstdout.close
    pstderr.close
  end
end