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Build AJAX-Based Web Maps Using ka-Map (3 tags)
By using AJAX, Google's maps draw and zoom quickly, pan smoothly, and can be extended to display a wide variety of information. This article by Tyler Mitchell shows how to make similar AJAX-based web mapping sites using an open source toolkit called ka-Map. Tyler is the author of Web Mapping Illustrated.

Interactive Debugging in Python (3 tags)
Debugging with print statements is alive and well. It's not the only way to do it, though. Python has a powerful interactive debugger that can let you get to the heart of your problem faster and more easily--if you know how to use it. Jeremy Jones shows off the features you absolutely must know.

Sowing the Seeds of Open Source Advocacy (2 tags)
Advocacy is critical to the spread of open source and free software. Good advocacy can help spread freedom and software quality, while bad advocacy can reinforce unpleasant stereotypes. Good advocacy requires far more than just being right, though. Jono Bacon explores how to approach the message and the audience.

Printing XML: Why CSS Is Better than XSL (2 tags)
One of the old school debates among XML developers is "CSS versus XSLT." Håkun Wium Lie and Michael Day revive that debate with a shot across XSL's bow.

Ten Essential Development Practices (2 tags)
Perl lets you be productive in everything from quick and dirty throwaway programs to big, business-critical applications. Building the latter requires some discipline, though. Damian Conway shares ten essential development practices to make your Perl programming easier, more reliable, and even more enjoyable.