A web mashup is a new type of web application that uses data and services from one or more external sources to build entirely new and different web applications. Web mashups usually mash up data and services that are available on the Internet freely, commercially, or through other partnership agreements. The external sources that a mashup uses are known as mashup APIs. This book shows you how to write web mashups using Ruby on Rails the new web application development framework. The book has seven real-world projects and each project is described in a methodical step-by-step way, showing...