Rails - Sep 2007 - Some way to sort and paginate mails read from a POP3 mail server

Problem:

I have written a program to fetch mails from a POP3 mail server. I do
not parse all the mails at once, but i process a predefined number
based on page_size ( i could not find a simpler way of pagination), as
follows

  def parseMail(page,pageSize)
      emails=Array.new
      #todo: open the connection only once, and iterate over the
mails, problem: connection to mail server closed
      Net::POP3::start(MAIL_SERVER,nil,USER,PASS) do |pop|
          if !pop.mails.empty?
              mails=pop.mails
              start=(page-1)*pageSize
              last=start+pageSize
              if (mails.length<last)
                  last=mails.length
              end

              mails[start..(last-1)].each do|mail|
              begin
                  email=TMail::Mail.parse(mail.pop)
                  emails.push(email)
                  rescue Exception => e
                      puts "Error receiving email at " + Time.now.to_s
+ "::: " + e.message
                      raise e.message
                  end
              end # end of the block
          end
      end

     return emails
  end


As you can see, i populate an array emails with the mails parsed. But
i want to sort the mails according to the date at which the mail was
sent. I want to parse the mails in the descending order of  the mail''s
sent date.  But pop.mails is an array of strings and i am not sure how
easily <=> operator can be implemented to order the mails this way.

Summary of the problem: A way to sort the mails read from a POP3
server, while not parsing all the mails.


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