Guillaume Laforge discusses what "idiomatic" Groovy code should look like, good practices in terms of syntax style, typing preferences and some nice shortcuts to help you be more productive.
Rahul Somasunderam aims at showing how Groovy can make iOS development a pleasure.
Brian Westrich shows examples of testing anti-patterns, including redundant testing, white box testing, and using the wrong type of test double. All examples are in Groovy and Spock.
Tom Henricksen covers Design Patterns in Groovy, compilation configuration, mixing Java and Groovy, and calling other languages from Groovy. He shows how to call Scala and Clojure from Groovy.
Allison Figus performs live demos of Geb tests driven by Spock. She takes a look at code and behind the code to understand what it means and why Geb is a great way to do functional automated testing.
Cédric Champeau explores the Groovy compiler. He discusses parsing, abstract syntax tree, type checking, type inference, bytecode and verifier.
Colin Harrington explores what it means to use a framework such as Grails as a power player on embedded Linux devices for IoT & home automation applications.
Jeff Brown presents Grails 3, which includes a lot of features and functionality related to building RESTful services.
Graeme Rocher takes a deep dive into the internals of Grails 3.x and reveals some hidden features and gems that you can take advantage of when developing your own Grails applications and plugins.
Jeff Brown discusses how Grails is very well suited for a microservice based architecture, that can result in applications which are easier to build, to test, to extend and to adapt to requirements.
Graeme Rocher, the Grails project lead, discusses the latest release of Grails and what is coming up during the course of the next year, covering all the new features of Grails 3.