Internals of Java Class Loading (2 tags)
When are two classes not the same? When they're loaded by different class loaders. This is just one of many curious side effects of Java's class-loading system. Binildas Christudas shows how different class loaders relate to one another and how (and why) to build your own custom class loader.
A Primer on Python Metaclass Programming (2 tags)
Classes and objects are simple, right? Once you really get it, isn't that all there is? Well, no--there's a whole class of advanced object-oriented techniques to make your code simpler, stronger, and more elegant. This week, David Mertz explains metaclasses--the building blocks of classes. Though the examples are in Python, the ideas translate to many other languages.