Perl : Tutorials

Following link points to a neat perl tutorial..

http://www.comp.leeds.ac.uk/Perl/

Some more links of String matching/replacements using perl:
http://www.htmlite.com/perl025c.php
http://www.troubleshooters.com/codecorn/littperl/perlreg.htm

Animating NSViews and NSWindows

Following is a neat article on how to animate, NSWindows and NSViews using core-animation.

http://www.informit.com/articles/article.aspx?p=1431312&seqNum=3