You can take the code provided in this book, adapt, or connect directly into your own application. This book mainly focuses on describing and explaining how to build applications using JavaScript, Ajax, and REST Web Services, along with some user interface issues. In particular, the following topics covered: implementing JavaScript unit tests; explain the purpose of Dynamic Languages, Web Services and SOA, setting and implementing contracts using REST; understanding why JavaScript Functions state, applying the JavaScript "Generic", which is a mix between the real and the algorithm Generic replacement; use code blocks, use the function to make a decision; understand the differences in the JavaScript code that behaves like a value type or reference type, implementing proxies, delegates, mixins, and overloaded functions; implement a complete Ajax and Web Service architecture; defines a Web Service using REST; handle large data sets or slow or real-time; implement shopping cart kind of architecture, and solve back button problem using Ajax. After reading this book you will learn how your web application modules by decoupling the client from the server.