You want increased customer satisfaction faster development cycles and less wasted work.
Domain-driven design (DDD) combined with functional programming is the innovative combo that
will get you there. In this pragmatic down-to-earth guide you'll see how applying the core
principles of functional programming can result in software designs that model real-world
requirements both elegantly and concisely - often more so than an object-oriented approach.
Practical examples in the open-source F# functional language and examples from familiar
business domains show you how to apply these techniques to build software that is
business-focused flexible and high quality. Domain-driven design is a well-established
approach to designing software that ensures that domain experts and developers work together
effectively to create high-quality software. This book is the first to combine DDD with
techniques from statically typed functional programming. This book is perfect for newcomers to
DDD or functional programming - all the techniques you need will be introduced and explained.
Model a complex domain accurately using the F# type system creating compilable code that is
also readable documentation---ensuring that the code and design never get out of sync. Encode
business rules in the design so that you have compile-time unit tests and eliminate many
potential bugs by making illegal states unrepresentable. Assemble a series of small testable
functions into a complete use case and compose these individual scenarios into a large-scale
design. Discover why the combination of functional programming and DDD leads naturally to
service-oriented and hexagonal architectures. Finally create a functional domain model that
works with traditional databases NoSQL and event stores and safely expose your domain via a
website or API. Solve real problems by focusing on real-world requirements for your software.
What You Need: The code in this book is designed to be run interactively on Windows Mac and
Linux.You will need a recent version of F# (4.0 or greater) and the appropriate .NET runtime
for your platform.Full installation instructions for all platforms at fsharp.org.
