Baruch Sadogursky and Fred Simon explain how to write AST transformations.
Sean Owen introduces Spark, Scala and random decision forests, and demonstrates the process of analyzing a real-world data set with them.
Marco Vermeulen discusses doing Behaviour Driven Development with Cucumber, Groovy and Grails.
Ken Kousen demonstrates the RESTful features in Grails and shows how to take advantage of them with annotations, controllers, renderers and more.
Chris Latimer discusses how to develop APIs ready for public consumption with Grails.
Lari Hotari discusses Grails 3's concept of application profiles for choosing a certain set of core plugins to use.
Christophe Grand tells Clojure stories full of immutability, data over behavior, relational programming, declarativity, incrementalism, parallelism, collapsing abstractions, local state and more.
Lari Hotari discusses how to optimize Grails' performance to get full benefits from it.
Jeff Scott Brown discusses the metaprogramming capabilities offered by Groovy, providing everything that developers needs to build systems that are far more capable than their all Java counterparts.
Bobby Warner discusses mobile automation and dives into the iOS and Android functional testing world using Groovy, Spock and Gradle.
Grails project lead Graeme Rocher demonstrates some less known, advanced features of GORM and explores the possibilities offered going beyond the relational database.
Thomas Kristensen describes the overall architecture of Composer, a system for composing musing, showing how to build a system that achieves responsiveness while still being flexible.