Name: Ferdinando Santacroce's review of Domain Modeling Made Functional by Scott Wlaschin
Item: Domain Modeling Made Functional
Rating: 5
Author: Ferdinando Santacroce

Scott Wlaschin

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.

Tackle Software Complexity with Domain-Driven Design and F#

Domain Modeling Made Functional

Ferdinando Santacroce

This book walks you through the key concepts of Domain Driven Design in a practical and easy to grok manner. Examples are well crafted and do not require expertise of F# (I read it with a little knowledge of a similar language, Kotlin). It helped me learn the "why" behind functional patterns.

The journey starts with identifying the Vocabulary for a Domain (ubiquitous language) using Event Storming. Next modeling with Types is covered. Workflows are represented with Functions along with the Types. Second part covers implementation strategies - dependency injection, handling effects with railway oriented programming and so on.

A great book, liked it.
A very good distillation of DDD, an interesting picture of F# and it's powerful Type System, and some Functional concepts and wisdom.

Don't buy it if you want to learn FP. It's not a book that wants to tech you one particular argument (DDD, FP, F#), but "only" a demonstration of how the "three amigos" can play well together.

Ferdinando Santacroce &
Domain Modeling Made Functional by Scott Wlaschin

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Ferdinando Santacroce &Domain Modeling Made Functional by Scott Wlaschin

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Ferdinando Santacroce &
Domain Modeling Made Functional by Scott Wlaschin