Anyone can learn computer science, even at the elementary school level. This book delves into the essential computer science concept of algorithms and procedures using age-appropriate language and colorful illustrations. A meaningful storyline is paired with an accessible curricular topic to engage and excite readers. This book introduces readers to a relatable character and familiar situation, which demonstrates how algorithms and procedures are used in everyday life. Rae follows instructions to build her very own robot. This fiction book is paired with the nonfiction book We Build a Drone (ISBN: 9781538353103). The instructional guide on the inside front and back covers provides: Vocabulary, Background knowledge, Text-dependent questions, Whole class activities, and Independent activities.

Anyone can learn computer science, even at the elementary school level. This book delves into the essential computer science concept of algorithms and procedures using age-appropriate language and colorful illustrations. A meaningful storyline is paired with an accessible curricular topic to engage and excite readers. This book introduces readers to a relatable character and familiar situation, which demonstrates how algorithms and procedures are used in everyday life. Rae follows instructions to build her very own robot. This fiction book is paired with the nonfiction book We Build a Drone (ISBN: 9781538353103). The instructional guide on the inside front and back covers provides: Vocabulary, Background knowledge, Text-dependent questions, Whole class activities, and Independent activities.

Get more out of your legacy systems: more performance, functionality, reliability, and manageability Is your code easy to change? Can you get nearly instantaneous feedback when you do change it? Do you understand it? If the answer to any of these questions is no, you have legacy code, and it is draining time and money away from your development efforts. In this book, Michael Feathers offers start-to-finish strategies for working more effectively with large, untested legacy code bases. This book draws on material Michael created for his renowned Object Mentor seminars: techniques Michael has used in mentoring to help hundreds of developers, technical managers, and testers bring their legacy systems under control. The topics covered include Understanding the mechanics of software change: adding features, fixing bugs, improving design, optimizing performance Getting legacy code into a test harness Writing tests that protect you against introducing new problems Techniques that can be used with any language or platform—with examples in Java, C++, C, and C# Accurately identifying where code changes need to be made Coping with legacy systems that aren't object-oriented Handling applications that don't seem to have any structure This book also includes a catalog of twenty-four dependency-breaking techniques that help you work with program elements in isolation and make safer changes.

WHAT VALUABLE COMPANY IS NOBODY BUILDING? The next Bill Gates will not build an operating system. The next Larry Page or Sergey Brin won’t make a search engine. If you are copying these guys, you aren’t learning from them. It’s easier to copy a model than to make something new: doing what we already know how to do takes the world from 1 to n, adding more of something familiar. Every new creation goes from 0 to 1. This book is about how to get there. ‘Peter Thiel has built multiple breakthrough companies, and Zero to One shows how.’ ELON MUSK, CEO of SpaceX and Tesla ‘This book delivers completely new and refreshing ideas on how to create value in the world.’ MARK ZUCKERBERG, CEO of Facebook ‘When a risk taker writes a book, read it. In the case of Peter Thiel, read it twice. Or, to be safe, three times. This is a classic.’ NASSIM NICHOLAS TALEB, author of The Black Swan

The Tcl language and Tk graphical toolkit are simple and powerful building blocks for custom applications. The Tcl/Tk combination is increasingly popular because it lets you produce sophisticated graphical interfaces with a few easy commands, develop and change scripts quickly, and conveniently tie together existing utilities or programming libraries.One of the attractive features of Tcl/Tk is the wide variety of commands, many offering a wealth of options. Most of the things you'd like to do have been anticipated by the language's creator, John Ousterhout, or one of the developers of Tcl/Tk's many powerful extensions. Thus, you'll find that a command or option probably exists to provide just what you need.And that's why it's valuable to have a quick reference that briefly describes every command and option in the core Tcl/Tk distribution as well as the most popular extensions. Keep this book on your desk as you write scripts, and you'll be able to find almost instantly the particular option you need.Most chapters consist of alphabetical listings. Since Tk and mega-widget packages break down commands by widget, the chapters on these topics are organized by widget along with a section of core commands where appropriate. Contents include: Core Tcl and Tk commands and Tk widgets C interface (prototypes) Expect [incr Tcl] and [incr Tk] Tix TclX BLT Oratcl, SybTcl, and Tclodbc

This book provides a comprehensive coverage on robot fish including design, modeling and optimization, control, autonomous control and applications. It gathers contributions by the leading researchers in the area. Readers will find the book very useful for designing and building robot fish, not only in theory but also in practice. Moreover, the book discusses various important issues for future research and development, including design methodology, control methodology, and autonomous control strategy. This book is intended for researchers and graduate students in the fields of robotics, ocean engineering and related areas.