From Mary, Queen of Scots, trapped by her own code, to the Navajo Code Talkers who helped the Allies win World War II, to the incredible (and incredibly simple) logisitical breakthrough that made Internet commerce secure, The Code Book tells the story of the most powerful intellectual weapon ever known: secrecy.Throughout the text are clear technical and mathematical explanations, and portraits of the remarkable personalities who wrote and broke the world’s most difficult codes. Accessible, compelling, and remarkably far-reaching, this book will forever alter your view of history and what drives it. It will also make you wonder how private that e-mail you just sent really is.

    This hands-on guide shows you how to get the most out of this free and powerful tool -- whether you're new to Google Analytics or have been using it for years.Google Analytics shows you how to track different market segments and analyze conversion rates, and reveals advanced techniques such as marketing-campaign tracking, a valuable feature that most people overlook. And this practical book not only provides complete code samples for web developers, it also explains the concepts behind the code to marketers, managers, and others on your team.Discover exactly how the Google Analytics system worksLearn how to configure the system to measure data most relevant to your business goalsTrack online marketing activities, including cost-per-click ads, email, and internal campaignsTrack events -- rather than page views -- on sites with features such as maps, embedded video, and widgetsConfigure Google Analytics to track enterprise data, including multiple domainsUse advanced techniques such as custom variables and CRM integration

    The language features full support for regular expressions, object-oriented modules, network programming, and process management. Perl is extensible, and supports modular, cross-platform development.In "Effective Perl Programming," Perl experts Joseph Hall and Randal Schwartz share programming solutions, techniques, programming pointers, rules of thumb, and the pitfalls to avoid, enabling you to make the most of Perl's power and capabilities.The authors will help you develop a knack for the right ways to do things. They show you how to solve problems with Perl, and how to debug and improve your Perl programs. Offering examples, they help you learn good Perl style. Geared for programmers who have already acquired Perl basics, the book will extend your skill range, providing the tactics and deeper understanding you need to create Perl programs that are more elegant, effective, and succinct. This book also speaks to those who want to become more fluent, expressive, and individualistic Perl programmers.To help you design and write effective Perl progams, Effective Perl Programming includes: Perl basics Idiomatic Perl Regular expressions Subroutines References Debugging Usage of packages and modules Object-oriented programming Useful and interesting Perl miscellanyNumerous thought-provoking examples appear throughout the book, highlighting many of the subtleties that make Perl such a fascinating, fun, and effective language to work with.