With its simple commands, flags, and parameters, a well-formed command-line application is the quickest way to automate a backup, a build, or a deployment and simplify your life. With this book, you'll learn specific ways to write command-line applications that are easy to use, deploy, and maintain, using a set of clear best practices and the Ruby programming language. This book is designed to make any programmer or system administrator more productive in their job. Now updated for Ruby 2.Writing a command-line application that's self-documenting, robust, adaptable and forever useful is easier than you might think. Ruby is particularly suited to this task, because it combines high-level abstractions with "close to the metal" system interaction wrapped up in a concise, readable syntax. Plus, Ruby has the support of a rich ecosystem of open source tools and libraries.Ten insightful chapters each explain and demonstrate a command-line best practice. You'll see how to use these tools to elevate the lowliest automation script to a maintainable, polished application. You'll learn how to use free, open source parsers to create user-friendly command-line interfaces as well as command suites. You'll see how to use defaults to keep options simple for everyday users, while giving advanced users options for more complex tasks. There's no reason why a command-line application should lack documentation, whether it's part of a help command or a man page; you'll find out when and how to use both. Your journey from command-line novice to pro ends with a look at valuable approaches to testing your apps, and includes some fun techniques for outside-the-box, colorful interfaces that will delight your users.With Ruby, the command line is not dead. Long live the command line.

    This new edition contains over 60 additional photographs and comments from people who worked and raced with Donohue during the 1960s and early 1970s.

    But don't be fooled--online advertising is exploding. Growing at a compound annual rate near 20%, it is now the second-largest advertising channel in the United States. Part history, part guidebook, part prediction for the future, Targeted tells the story of the companies, individuals, and innovations driving this revolution. It takes readers behind the scenes--examining the growth of digital advertising, its enormous potential, and the technologies that are changing the game forever. Leading the way is real-time bidding, which offers advertisers unprecedented precision in targeting ads and measuring their effectiveness. From keyword micro-markets and ad serving systems to aggregated virtual audiences and new business models, Targeted is sweeping in scope and stripped of technical complexity. It is an essential resource for anyone interested in finding and connecting with customers in the vast and shifting Internet universe.