Rúnar Bjarnason talks about the ideas behind and features in the popular scalaz library, programming concepts like (bi-directional) lenses, Scala Macros, and much more.
Miles Sabin explains dependent typing in Scala, the Shapeless project that demonstrates these concepts, static typing improvements in Scala and Scala Macros.
Lance Walton discusses Scala in the enterprise, educating developers in functional programming and whether Scala's binary compatibility issues between releases are a problem, and much more.
Dick Wall explores the state and future of Java, his reasons for switching to programming in Scala, the SubCut Dependency Injection library for Scala, Scala Compiler Plugins and much more.
Sadek Drobi discusses functional programming sand Scala's multi paradigm approach at QCon London 2012. He also shares insights into the new Play 2.0 framework.
Viktor Klang talks about the features of Akka 2.x and future releases, Akka's approach to fault tolerance, the effort to unify Futures in Scala, and the state of functional programming.
Rich Hickey explains Clojure 1.4's extensible Reader, which allows to provide custom notation for data without the problems of Reader macros. Also: ClojureScript, Clojure in Clojure, and Avout.
Rich Hickey explains the ideas behind the Datomic database: why Datalog is used as the query language, the functional programming concepts at its core, the role of time in the DB and much more.
Howard Lewis Ship discusses Tapestry 5, changes he'd like to see in Java, Clojure, and Java/Clojure interoperability.
Attila Szegedi talks about performance tuning Java and Scala programs at Twitter: how to approach GC problems, the importance of asynchronous I/O, when to use MySQL/Cassandra/Redis, and much more.
In this interview recorded at JavaOne 2011 Conference, Srini Penchikala talks to Grails project lead Graeme Rocher about Grails 2.0 features, polyglot persistence paradigm and how Grails supports it. Graeme also talks about the tool support and the upcoming features in Grails 3.0 release.