Eben Hewitt introduces the Apache Cassandra project to those interested in getting a quick clear picture of what Cassandra is, what are its main features, what is the the data model used and the API.
Josh Bloch and Bob Lee present 7 Java code puzzlers, code seeming to produce some result, but actually producing something unexpected. They explain why is that, showing the correct solution.
Guy Steele, Douglas Crockford, Josh Bloch, Alex Payne, Bruce Tate, and Ted Neward (moderator) hold a discussion on the future of programming taking questions from the audience.
Scott Davis reviews some of the most important HTML5 features: semantic elements (header, footer, nav, section, and article), form enhancements, video and mobile support, already in use today.
Scott Davis makes a case for semantic data, pointing out that it is currently used by major websites to improve their traffic, presenting 2 ways to add metadata to a document: RDFa and microformats.
Chris Houser presents the expression problem showing how to solve it using multimethods and protocols in Clojure, mentioning pros and cons of each method.
Yehuda Katz presents the evolution of the Ruby on Rails project, the challenges it had to overcome and what are the lessons that could be helpful in making other open source projects successful.
Hilary Mason presents the history of machine learning covering the most significant developments in the area, and showing how bit.ly uses it to discover various statistical information about users.
Bob Lee and Eric Burke present Square, a card reader used to receive payments through an Android device, presenting a point-of-sale API, and a library for persistence and REST communication.