This is an introduction to H2O from Oxdata, an open source, big data in-memory prediction engine. Michal Malohlava and Cliff Click discuss the value of predictions, how they're done, and Scala's role.
Macros are handy tools, but can also cause a lot of headaches. Adriaan Moors discusses common pitfalls, and how you can make them IDE friendly, in hopes of making macros a little less scary.
The De Mey brothers take a look at the future of the web, explain the basics of web components, and how you can leverage new tools to create a better web for both developers and users.