Michael Fogus overviews Datalog and provides examples of how it is implemented and used in Datomic, Cascalog, and the Bacwn Clojure library.
Michael Homer introduces Grace, an educational OO language used to teach programming to students.
Matthew Dennis covers the most common mistakes made with Cassandra that he has noticed being made both in deployment and code.
Mark Little provides advice on when it is not recommended to use transactions and how to use transactions with Web Services, NoSQL, REST and mobile infrastructures.
Michael Feathers describes an approach toward planning the design of the functional portions of an application by using a variation of Haskell type expression syntax.
Kathleen Ting details 8 misconfigurations that can bring ZooKeeper down.
Kevin Lynagh provides the rationale behind visual interfaces, and presents a sample example written in ClojureScript.
Johan Oskarsson explains how Twitter is using Zipkin to trace a pages in order to see their execution path and to determine the time spent for loading for performance monitoring and analysis.
Jez Ng, CJ Carey and Jonny Leahey introduce Doppio, a JVM written in CoffeeScript for the browser.
José Valim introduces Elixir, a programming language for the Erlang VM – an attempt to provide better abstractions and productivity tools like protocols and macros usually required for web development.
Jeff Kelley introduces the Grand Central Dispatch framework for writing concurrent applications for iOS.