Simple, Secure, Scalable Web Development with OpaThe examples in this book require a version of Opa dated from May 18th or later. Opa is a new generation of web development platform. It is a new programming language, a new web server, a new database and a new distributed execution engine, all of them tightly integrated to provide a great experience for web developers. And it works in the cloud too! Throughout the pages of this book, we will intr
