Tutorials

This page contains links to some of my tutorials on various things. These aren't your "in general" kind of tutorials that you would find on a billion other sites. These are tutorials about lesser-known things and some harder-to-find information.

Web Security

Fighting Internet Spam Crawlers

• Trapping "Dumb Submitter Bots"
  One of the most common spam bots are the "dumb submitter" kind. They seek out web forms on pages, fill every field full of spam and submit it. Thus, even a home-made guestbook script or a "contact the webmaster" form gets spammed. Learn how to trap submitter bots and prevent them from spamming your web forms.

Perl

General

• Upgrading to Perl 5.10.0
  Perl 5.10 brings a lot of new features to the Perl programming language. You can get a glimpse of them at http://dev.perl.org/perl5/news/2007/perl-5.10.0.html. This page will tell you how to upgrade to Perl 5.10.

Perl/Tk

• Transparent Window Icons
  Having window icons that aren't squares is a trivial concept, but it's also notoriously hard to figure out for Perl Tk windows. After spending the better part of a year researching this, I've finally figured out how to do it. It's actually quite a simple solution that simply has never been documented very clearly before.