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Michael C. Feathers
The average book on Agile software development describes a fairyland of greenfield projects, with wall-to-wall tests that run after every few edits, and clean & simple source code.
The average software project, in our industry, was written under some aspect of code-and-fix, and without automated unit tests. And we can't just throw this code away; it represents a significant effort debugging and maintaining. It contains many latent requirements decisions. Just as Agile processes are incremental, Agile adoption must be incremental too. No more throwing away code just because it looked at us funny.
Mike begins his book with a very diplomatic definition of "Legacy". I'l skip ahead to the undiplomatic version: Legacy code is code without unit tests.
Before cleaning that code up, and before adding new features and removing bugs, such code must be de-legacified. It needs unit tests.
To add unit tests, you must change the code. To change the code, you need unit tests to show how safe your change was.
The core of the book is a cookbook of recipes to conduct various careful attacks. Each presents a particular problem, and a relatively safe way to migrate the code towards tests.
Code undergoing this migration will begin to experience the benefits of unit tests, and these benefits will incrementally make new tests easier to write. These efforts will make aspects of a legacy codebase easy to change.
It's an unfortunate commentary on the state of our programming industry how much we need this book.
Daniel P. Friedman, Matthias Felleisen
"drawings by Duane Bibby" foreword by Gerald J. Sussman "I learned more about LISP from this book than I have from any of the other LISP books I've read over the years. . . . While other books will tell you the mechanics of LISP, they can leave you largely uninformed on the style of problem-solving for which LISP is optimized. The Little LISPer teaches you how to think in the LISP language. . . an inexpensive, enjoyable introduction." -- Gregg Williams, Byte The notion that "thinking about computing is one of the most exciting things the human mind can do" sets both "The Little Schemer" (formerly known as "The Little LISPer" ) and its new companion volume, "The Seasoned Schemer," apart from other books on LISP. The authors' enthusiasm for their subject is compelling as they present abstract concepts in a humorous and easy-to-grasp fashion. Together, these books will open new doors of thought to anyone who wants to find out what computing is really about. "The Little Schemer" introduces computing as an extension of arithmetic and algebra -- things that everyone studies in grade school and high school. It introduces programs as recursive functions and briefly discusses the limits of what computers can do. The authors use the programming language Scheme, and interesting foods to illustrate these abstract ideas. "The Seasoned Schemer" informs the reader about additional dimensions of computing: functions as values, change of state, and exceptional cases. "The Little LISPer" has been a popular introduction to LISP for many years. It had appeared in French and Japanese. "The Little Schemer" and "The SeasonedSchemer" are worthy successors and will prove equally popular as textbooks for Scheme courses as well as companion texts for any complete introductory course in Computer Science. Download DrScheme - a graphical environment for developing Scheme programs
This is, quite simply, the definitive reference on the most important development in software technology for the last 20 years: object-orientation.A whole generation was introduced to object technology through the first edition of this book. This long-awaited new edition retains the qualities of clarity, practicality and scholarship that made the first an instant best-seller, but has been thoroughly revised and expanded. Among the new topics covered in depth are: Concurrency, distribution, client/server and the Internet; object-oriented databases; design by contract; fundamental design patterns; finding classes; the use and misuse of inheritance; abstract data types; and typing issues. The book also includes completely updated discussions of reusability, modularity, software quality, object-oriented languages, memory management, and many other essential topics.All software developers and computer science students, worldwide.
In his long-awaited book, Martin Fowler has done for application domain patterns what the Gang of Four [Gamma et al.] have done for general purpose design patterns in their book, Design Patterns: Elements of Reusable Object-Oriented Software. This book is a must have for all analysts and designers doing object-oriented business modeling and business process re-engineering. —Donald G. Firesmith, Knowledge Systems Corporation Fowler shares with you his wealth of object modeling experience and his keen eye for identifying repeating problems and transforming them into reusable models. Analysis Patterns provides a catalogue of patterns that have emerged in a wide range of domains, including trading, measurement, accounting, and organizational relationships.
Structure and Interpretation of Computer Programs has had a dramatic impact on computer science curricula over the past decade. This long-awaited revision contains changes throughout the text. There are new implementations of most of the major programming systems in the book, including the interpreters and compilers, and the authors have incorporated many small changes that reflect their experience teaching the course at MIT since the first edition was published. A new theme has been introduced that emphasizes the central role played by different approaches to dealing with time in computational models: objects with state, concurrent programming, functional programming and lazy evaluation, and nondeterministic programming. There are new example sections on higher-order procedures in graphics and on applications of stream processing in numerical programming, and many new exercises. In addition, all the programs have been reworked to run in any Scheme implementation that adheres to the IEEE standard.
Paradigms of AI Programming is the first text to teach advanced Common Lisp techniques in the context of building major AI systems. By reconstructing authentic, complex AI programs using state-of-the-art Common Lisp, the book teaches students and professionals how to build and debug robust practical programs, while demonstrating superior programming style and important AI concepts. The author strongly emphasizes the practical performance issues involved in writing real working programs of significant size. Chapters on troubleshooting and efficiency are included, along with a discussion of the fundamentals of object-oriented programming and a description of the main CLOS functions. This volume is an excellent text for a course on AI programming, a useful supplement for general AI courses and an indispensable reference for the professional programmer.
Let Over Lambda is one of the most hardcore computer programming books out there. Starting with the fundamentals, it describes the most advanced features of the most advanced language: Common Lisp. Only the top percentile of programmers use lisp and if you can understand this book you are in the top percentile of lisp programmers. If you are looking for a dry coding manual that re-hashes common-sense techniques in whatever langue du jour, this book is not for you. This book is about pushing the boundaries of what we know about programming. While this book teaches useful skills that can help solve your programming problems today and now, it has also been designed to be entertaining and inspiring. If you have ever wondered what lisp or even programming itself is really about, this is the book you have been looking for.
Luke VanderHart, Stuart Sierra
Clojure is the best all-purpose programming language that I have yet to encounter in my software development career. When I first began learning it, I found myself thrilled and satisfied in ways that I can only recall experiencing once beforeùwhen I received my first computer, and entered those first few commands and watched in delight as it responded with precision to my instructions. Over the years, of course, much of the charm of programming wore off. The excitement of imposing my will on a complex machine gradually became lost as I repeatedly slogged through the same exercises and patterns, overcoming with difficulty the inherent complexities of ever-larger systems. But with Clojure, I noticed a curious shift. I began, once more, to enjoy the act of programming. Not just the act of creation and planning, which I've always liked, but even implementing low-level, "everyday" routines. Programming in Clojure is like removing a restrictive suitùonce more, you'll feel like you are actually in control, expressing yourself to the program directly rather than through layers of vaguely necessary indirection. You will be impressed and pleased with Clojure's expressiveness, allowing scope for creativity and original abstractions. Instead of programs becoming more complex and difficult to understand as they grow, Clojure programs become simpler and more expressive. More than that, Clojure will encourage you to try things that are simply too complicated to do regularly in other languages: concurrency, immutability, and lazy data structures. Plus since it runs on the JVM, you can use the same platform, libraries, and tools that you are comfortable with. I hope that this book opens the same doors for you as it did for me, and shows Clojure to be the fun, expressive, and mature language that I have found it to be. Sincerely, Luke VanderHart
Phylogenies, or evolutionary trees, are the basic structures necessary to think about and analyze differences between species. Statistical, computational, and algorithmic work in this field has been ongoing for four decades now, and there have been great advances in understanding. Yet no book has summarized this work. Inferring Phylogenies does just that in a single, compact volume. Phylogenies are inferred with various kinds of data. This book concentrates on some of the central ones: discretely coded characters, molecular sequences, gene frequencies, and quantitative traits. Also covered are restriction sites, RAPDs, and microsatellites.
Stuart Sierra, Luke VanderHart
G. E. Revesz
Originally published in 1988, this book presents an introduction to lambda-calculus and combinators without getting lost in the details of mathematical aspects of their theory. Lambda-calculus is treated here as a functional language and its relevance to computer science is clearly demonstrated. The main purpose of the book is to provide computer science students and researchers with a firm background in lambda-calculus and combinators and show the applicabillity of these theories to functional programming. The presentation of the material is self-contained. It can be used as a primary text for a course on functional programming. It can also be used as a supplementary text for courses on the structure and implementation of programming languages, theory of computing, or semantics of programming languages.
A single-volume guide to recreating 100 top-selected synthesizer sounds from hit songs provides illustrated two-page spreads that list details about how the sound was originally created on professional-grade synthesizers and how to create the same sounds today using modern plug-ins and readily available software instruments. Original.
If the usual patchwork of web development tools and languages just isn't cutting it for you, you need Web Development With Clojure. Clojure gives you the rich infrastructure of the JVM with the expressive power of a modern functional language. It combines excellent performance with rapid development--and you can exploit these virtues for web app development. With step-by-step examples, you'll learn how to harness that power and richness to build modern web applications. Modern web development needs modern tools. Web Development With Clojure shows you how to apply Clojure programming fundamentals to build real-world solutions. You'll develop all the pieces of a full web application in this powerful language. If you already have some familiarity with Clojure, you'll learn how to put it to serious practical use. If you're new to the language, the book provides just enough Clojure to get down to business. You'll learn the full process of web development using Clojure while getting hands-on experience with current tools, libraries, and best practices in the language. You'll develop Clojure apps with both the Light Table and Eclipse development environments. Rather than frameworks, Clojure development builds on rich libraries. You'll acquire expertise in the popular Ring/Compojure stack, and you'll learn to use the Liberator library to quickly develop RESTful services. Plus, you'll find out how to use ClojureScript to work in one language on the client and server sides. Throughout the book, you'll develop key components of web applications, including multiple approaches to database access. You'll create a simple guestbook app and an app to serve resources to users. By the end, you will have developed a rich Picture Gallery web application from conception to packaging and deployment. This book is for anyone interested in taking the next step in web development. What You Need: The latest JVM, Clojure 1.4+, and the Leiningen build tool, as well as an editor such as Emacs, Eclipse, or Light Table.