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'Eric Evans has written a fantastic book on how you can make the design of your software match your mental model of the problem domain you are addressing. 'His book is very compatible with XP. It is not about drawing pictures of a domain; it is about how you think of it, the language you use to talk about it, and how you organize your software to reflect your improving understanding of it. Eric thinks that learning about your problem domain is as likely to happen at the end of your project as at the beginning, and so refactoring is a big part of his technique. 'The book is a fun read. Eric has lots of interesting stories, and he has a way with words. I see this book as essential reading for software developers-it is a future classic.' -Ralph Johnson, author of Design Patterns 'If you don't think you are getting value from your investment in object-oriented programming, this book will tell you what you've forgotten to do. 'Eric Evans convincingly argues for the importance of domain modeling as the central focus of development and provides a solid framework and set of techniques for accomplishing it. This is timeless wisdom, and will hold up long after the methodologies du jour have gone out of fashion.' -Dave Collins, author of Designing Object-Oriented User Interfaces 'Eric weaves real-world experience modeling-and building-business applications into a practical, useful book. Written from the perspective of a trusted practitioner, Eric's descriptions of ubiquitous language, the benefits of sharing models with users, object life-cycle management, logical and physical application structuring, and the process and results of deep refactoring are major contributions to our field.' -Luke Hohmann, author of Beyond Software Architecture 'This book belongs on the shelf of every thoughtful software developer.' -Kent Beck 'What Eric has managed to capture is a part of the design process that experienced object designers have always used, but that we have been singularly unsucc

Functional programming (FP) is a programming style emphasizing functions that return consistent and predictable results regardless of a program's state. As a result, functional code is easier to test and reuse, simpler to parallelize, and less prone to bugs. Scala is an emerging JVM language that offers strong support for FP. Its familiar syntax and transparent interoperability with existing Java libraries make Scala a great place to start learning FP., Functional Programming in Scala is a serious tutorial for programmers looking to learn FP and apply it to the everyday business of coding. The book guides readers from basic techniques to advanced topics in a logical, concise, and clear progression. In it, you'll find concrete examples and exercises that open up the world of functional programming., You'll discover simple but powerful ideas and techniques that cut through the complexity of modern software engineering, including writing multi-core and distributed programs. You'll learn how FP gives you high confidence in the correctness of your code and helps you design software at high levels of abstraction so that even very large systems become comprehensible at a glance., WHAT'S INSIDE:, Functional programming from square one in clear, readable language, No prior Scala experience needed, Learn both the hows and whys of FP, No prior experience with FP or Scala is required. Perfect for programmers familiar with FP in other languages wishing to apply their knowledge in Scala.