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

Summary


In this chapter, we have reviewed parts of the Scala language that we'll need in further sections when creating our web application's views using the Scala templating system.

We first introduced the language itself. Then we moved to the definition of an expression, studying some expressions in detail. We also looked at some ways with which Scala allows us to manipulate sequences. Well actually, we've seen enough to tackle most cases encountered when creating views for sequences (for instance, showing a list of users grouped by the first letter of their last name). We've seen how we can transform the elements into a new sequence, filter them, check their existence, and so on.

Such sequences are used most of the time with generics (especially when domain modeling is used with a top-level interface), but it's not a big deal for us as we can now declare and use generics in Scala.

Finally, we are able to create functions that result in functions, which in turn result in other functions,...