The Web is awash in Ruby code that is now virtually impossible to change or extend. This text helps you solve that problem by using powerful real-world object-oriented design techniques, which it thoroughly explains using simple and practical Ruby examples. Sandi Metz has distilled a lifetime of conversations and presentations about object-oriented design into a set of Ruby-focused practices for crafting manageable, extensible, and pleasing code. She shows you how to build new applications that can survive success and repair existing applications that have become impossible to change. Each technique is illustrated with extended examples, all downloadable from the companion Web site, poodr.info. The first title to focus squarely on object-oriented Ruby application design, Practical Object-Oriented Design in Ruby will guide you to superior outcomes, whatever your previous Ruby experience. Novice Ruby programmers will find specific rules to live by; intermediate Ruby programmers will find valuable principles they can flexibly interpret and apply; and advanced Ruby programmers will find a common language they can use to lead development and guide their colleagues. This guide will help you Understand how object-oriented programming can help you craft Ruby code that is easier to maintain and upgrade Decide what belongs in a single Ruby class Avoid entangling objects that should be kept separate Define flexible interfaces among objects Reduce programming overhead costs with duck typing Successfully apply inheritance Build objects via composition Design cost-effective tests Solve common problems associated with poorly designed Ruby code

    The result is described as “a thought-provoking visual feast”.

    Edited by the Sustainability Institute’s Diana Wright, this essential primer brings systems thinking out of the realm of computers and equations and into the tangible world, showing readers how to develop the systems-thinking skills that thought leaders across the globe consider critical for 21st-century life.Some of the biggest problems facing the world—war, hunger, poverty, and environmental degradation—are essentially system failures. They cannot be solved by fixing one piece in isolation from the others, because even seemingly minor details have enormous power to undermine the best efforts of too-narrow thinking.While readers will learn the conceptual tools and methods of systems thinking, the heart of the book is grander than methodology. Donella Meadows was known as much for nurturing positive outcomes as she was for delving into the science behind global dilemmas. She reminds readers to pay attention to what is important, not just what is quantifiable, to stay humble, and to stay a learner.In a world growing ever more complicated, crowded, and interdependent, Thinking in Systems helps readers avoid confusion and helplessness, the first step toward finding proactive and effective solutions.

    He guides you, step by step, as you discover how to combine the tenets of classic storytelling with the power of the projected media to create a rich, engaging experience. He walks you through his easy-to-use templates, plus 50 advanced tips, to help build your confidence and effectiveness—and quickly bring your ideas to life!FOCUS: Learn how to distill your best ideas into a crisp and compelling narrative.CLARIFY: Use a storyboard to clarify and visualize your ideas, creating the right blend of message and media.ENGAGE:Move from merely reading your slides to creating a rich, connected experience with your audience—and increase your impact!Inside!: See sample storyboards for a variety of presentation types—including investment, sales, educational, and training.

    A Problem2. Peter Pigeonhole Prepared A Petition3. What's Your Problem?Part 2: What is The Problem?4. Billy Brighteyes Bests The Bidders5. Billy Bites His Tongue6. Billy Back To The BiddersPart 3: What is The Problem Really?7. The Endless Chain8. Missing The Misfit9. Landing On The Level10. Mind Your MeaningPart 4: Whose Problem Is It?11. Smoke Gets In Your Eyes12. The Campus That Was All Spaced Out13. The Lights At The End Of The TunnelPart 5: Where Does It Come From?14. Janet Jaworski Joggles A Jerk15. Mister Matczyszyn Mends The Matter16. Make-Works And Take-Credits17. Examinations And Other PuzzlesPart 6: Do We Really Want To Solve It?18. Tom Tireless Tinkers With Toys19. Patience Plays Politics20. A Priority Assignment

    Under the leadership of Henrik Kniberg they experimented with different team sizes, different sprint lengths, different ways of defining "done", different formats for product backlogs and sprint backlogs, different testing strategies, different ways of doing demos, different ways of synchronizing multiple Scrum teams, etc. They also experimented with XP practices - different ways of doing continuous build, pair programming, test driven development, etc, and how to combine this with Scrum.

    With this insightful book, intermediate to experienced programmers interested in data analysis will learn techniques for working with data in a business environment. You'll learn how to look at data to discover what it contains, how to capture those ideas in conceptual models, and then feed your understanding back into the organization through business plans, metrics dashboards, and other applications.Along the way, you'll experiment with concepts through hands-on workshops at the end of each chapter. Above all, you'll learn how to think about the results you want to achieve -- rather than rely on tools to think for you.Use graphics to describe data with one, two, or dozens of variablesDevelop conceptual models using back-of-the-envelope calculations, as well asscaling and probability argumentsMine data with computationally intensive methods such as simulation and clusteringMake your conclusions understandable through reports, dashboards, and other metrics programsUnderstand financial calculations, including the time-value of moneyUse dimensionality reduction techniques or predictive analytics to conquer challenging data analysis situationsBecome familiar with different open source programming environments for data analysisFinally, a concise reference for understanding how to conquer piles of data.--Austin King, Senior Web Developer, MozillaAn indispensable text for aspiring data scientists.--Michael E. Driscoll, CEO/Founder, Dataspora

    It is written in a conversational tone, doesn't take itself too seriously, and avoids extraneous fluff."- Eric Ries, Author & Creator of the Lean Startup methodology"Get the CustDev book to dive deep into customer interviews and understand how your product can be developed to meet your customers' needs."- Dan Martell, Founder of Flowtown, angel investorCustomer Development is a four-step framework for helping startups discover and validate their customers, product, and go-to-market strategy, developed by Steve Blank and an integral part of Eric Ries' Lean Startup methodology. Focused on the Customer Discovery step, The Entrepreneur's Guide to Customer Development is an easy to follow guide for finding early adopters, building a Minimum Viable Product, finding Product-Market fit, and establishing a sales and marketing roadmap.Deemed a "must-read" by Steve Blank and Eric Ries, inside you will find detailed customer development and lean startup concept definitions, a step-by-step approach to best practices, a business model analysis guide, case studies, rich graphics, as well as worksheets and exercises. No matter the stage of your business, you will return often to this guide to learn how to build a product people want;"get out of the building;" foster strong customer relationships; test business model risk; reach out to early adopters; conduct startup marketing; create a customer funnel based on buyers' process; and prepare your startup to scale up.The Entrepreneur's Guide to Customer Development: A Cheat Sheet to The Four Steps to the Epiphany, affectionately known as the "CustDev book," serves as course text for classes at Stanford University, University of Chicago, Boston University, DePaul University, University of Minnesota and University of Norway."Our UCL (University College London) students love The Entrepreneur's Guide to Customer Development. Thanks to Brant & Patrick for writing this helpful book. "- Dave Chapman, Deputy Head of the Department of Management Science and Innovation at UCL (University College London)"Love it! Required reading for all NYU entrepreneurs."- Frank Rimalovski, Managing Director of NYU Innovation Venture FundThis book is both an introduction for those unfamiliar with lean concepts and highly actionable for lean practitioners. It is a user friendly guide, written to be accessible to marketing professionals, Engineers startup founders and entrepreneurs, VCs, angels, and anyone else involved in building scalable startups.Existing companies will benefit to from applying Customer Development principles described in detail herein: for example, startups struggling to achieve market traction, or well established companies seeking to spark new innovation.This is a business book for startups like no other. No fluff, but rather sound principles and concrete steps to take to build your business. Get up to speed on Customer Development now.

    B.J. Fogg, director of the Persuasive Technology Lab at Stanford University. Fogg has coined the phrase Captology(an acronym for computers as persuasive technologies) to capture the domain of research, design, and applications of persuasive computers.In this thought-provoking book, based on nine years of research in captology, Dr. Fogg reveals how Web sites, software applications, and mobile devices can be used to change people's attitudes and behavior. Technology designers, marketers, researchers, consumers--anyone who wants to leverage or simply understand the persuasive power of interactive technology--will appreciate the compelling insights and illuminating examples found inside.Persuasive technology can be controversial--and it should be. Who will wield this power of digital influence? And to what end? Now is the time to survey the issues and explore the principles of persuasive technology, and B.J. Fogg has written this book to be your guide.

    In fact, this one document can steer an entire organization when it comes to delivering on company strategy. This practical guide teaches you how to create an effective product roadmap, and demonstrates how to use the roadmap to align stakeholders and prioritize ideas and requests. With it, you’ll learn to communicate how your products will make your customers and organization successful. Whether you're a product manager, product owner, business analyst, program manager, project manager, scrum master, lead developer, designer, development manager, entrepreneur, or business owner, this book will show you how to: Articulate an inspiring vision and goals for your product Prioritize ruthlessly and scientifically Protect against pursuing seemingly good ideas without evaluation and prioritization Ensure alignment with stakeholders Inspire loyalty and over­-delivery from your team Get your sales team working with you instead of against you Bring a user­ and buyer-­centric approach to planning and decision-making Anticipate opportunities and stay ahead of the game Publish a comprehensive roadmap without over­committing

    But there's often mystery around product research, with the feeling that you need to be a research Zen master to gather anything useful. Fact is, anyone can conduct product research. With this quick reference guide, you'll learn a common language and set of tools to help you carry out research in an informed and productive manner.This book contains four sections, including a brief introduction to UX research, planning and preparation, facilitating research, and analysis and reporting. Each chapter includes a short exercise so you can quickly apply what you've learned.Learn what it takes to ask good research questionsKnow when to use quantitative and qualitative research methodsExplore the logistics and details of coordinating a research sessionUse softer skills to make research seem natural to participantsLearn tools and approaches to uncover meaning in your raw dataCommunicate your findings with a framework and structure