Book Image

Learning Play! Framework 2

By : Andy Petrella
Book Image

Learning Play! Framework 2

By: Andy Petrella

Overview of this book

<p>The Learning Play! Framework 2 has been created for web developers that are building web applications. The core idea is to focus on the HTTP features and to enable them through a simplification lens. Building a web application no longer requires a configuration phase, an environment setup, or a long development lifecycle - it's integrated!<br /><br />Learning Play! Framework 2 will enable any web developers to create amazing web applications taking advantage of the coolest features. It's the fastest way to dive into Play!, focusing on the capabilities by using them in a sample application. Although essentially Java based code, a Scala version is presented as well – giving an opportunity to see some Scala in action.<br /><br />After setting up the machine and learning some Scala, you will construct an application which builds from static to dynamic, before introducing a database. <br /><br />Then we'll focus on how data can be consumed and rendered in several ways. This will enable some real time communication through WebSocket and Server-Sent Event – on both server and client sides.</p> <p>The book will end with testing and deployment, which completes any web development project.</p>
Table of Contents (20 chapters)
Learning Play! Framework 2
Credits
About the Author
Acknowledgement
About the Reviewers
www.packtpub.com
Preface
Materials
Index

Introducing Scala


Scala is such a complete language that it could be defined in several ways. However, we'll try to summarize it with some shortcuts. Scala is a complete language meant to optimize development time and code. That's why the name Scala was chosen, which stands as a mix of scalable and language. The name signifies that the underlying concepts of the language are growing well with application needs or complexities.

Why Scala can be defined as optimized is mostly because of the paradigms on which it relies and the ones it offers.

In short, Scala code is more concise and elegant, and can be less buggy simply by smoothly combining the features from an object-oriented language and a functional one. Very roughly, take a blender, drop in Java and Haskell, and you'll get a taste of Scala.

In the coming sections, we'll see the common features of Scala.

Expressing your code

Scala is a language that uses expressions wherever it makes sense—which is everywhere. Indeed, an expression is an...