The other day I was reviewing XP practices and came accross this interesting scoop about differences between Scrum and XP. As the author mentions, XP and Scrum are very aligned but have subtle yet important differences and I agree with those. It worth a read.

Reading and writing Extensible Markup Language (XML) in PHP may seem a little frightening. In fact, XML and all its related technologies can be intimidating. However, reading and writing XML in PHP doesn't have to be a daunting task. First, you need to learn a little about XML -- what it is and what it's used for. Then, you need to learn how to read and write XML in PHP, which you can do in many ways.

A quick explanation of Python for Programmers. One image says it all.

Learn how to exploit fine-grained parallelism using the fork-join framework coming in Java 7