A couple of easy-to-fix tips :

• The link in your note above is not click-able. Here is a Clickable version of your http://earth.prohosting.com/foreach/perl/oo.html
• In your 'add' and 'subtract' methods, your return values though correct, are not explicit. I would rather see the code written as

    $self->{num} += $add;
    return $self->{num}; 
  [download]

  Yes, that could be single-ligned like
  return $self->{num} += $add;
  But that could potentially cause brain-damage for confused newbies.

The web page needs some formatting cleanup badly.

Lose the funky background. It intrudes on the text itself.

Wrap your code in PRE tags so the line breaks come where you meant them to. It showed up on my screen all flowed together in an unreadable mess.

Because of these issues (primarly the latter), I was unable to look at it with a critical eye to give you any useful feedback on the content.

yours,
Michael

Apart from the psychedelic background, have you seen any books printed on that type of paper, I think it is very good considering the intended audience.

My advice is to write up a true node in this place, instead of just the link

And by all means register yourself and get a handle so your efforts can be rewarded ;-)

I have added the value-return for methods that operate upon the number. And I have added the printed output from useit.pl.

In addition I finally became a monk :-) ( yes I do have that fresh-car smell now and I am confused ) and I have also posted the tutorial as a full-fledged node. I would be grateful if a moderator deleted the node that was only a link to the document.

An aside:
I consider the background very Art-Deco and it lends character to my site. Herveus, the formatting problems you mentioned are pretty horrible - I have never experienced them in my browser, would you be kind enough to tell me your browser type+version? Thank you for notifying me. ( as well, all of the content on the page was in pre ).

update (broquaint): dropped <pre> tags and added formatting