Scala Design Patterns

Explaining how to achieve code reuse in Scala, this review of the exciting new programming language includes numerous code examples. It explores functional design patterns and considers how these can be interpreted in Scala's uniquely hybrid style.

Scala is a new and exciting programming language that is a hybrid between object oriented languages such as Java and functional languages such as Haskell. As such it has its own programming idioms and development styles.

Scala Design Patterns looks at how code reuse can be successfully achieved in Scala. A major aspect of this is the reinterpretation of the original Gang of Four design patterns in terms of Scala and its language structures (that is the use of Traits, Classes, Objects and Functions). It includes an exploration of functional design patterns and considers how these can be interpreted in Scala's uniquely hybrid style.

A key aspect of the book is the many code examples that accompany each design pattern, allowing the reader to understand not just the design pattern but also to explore powerful and flexible Scala language features. Including numerous source code examples, this book will be of value to professionals and practitioners working in the field of software engineering.

Interprets purely Functional Patterns in terms of design patterns for use in Scala's hybrid style Illustrates how to maximise code reuse through functions, currying, and dependency injection using Scala language facilities Presents the Gang of Four Design Patterns using Scala language structures (which differ significantly from languages such as Java with the inclusion of Functions as first class language elements)

Contenu

Author's Note.- Part I Introduction .- Introduction.- Design Patterns.- UML and Scala.- Part II Fundamental Patterns .- Immutability.- Singleton.- Marker Trait.- Delegation.- Part III Code Reuse Patterns .- Lazy Parameters.- Partially Applied Functions.- Trait Based Template Operation.- Stackable Traits.- Currying and Code Reuse.- Cake Pattern.- Structural Injection.- Implicit Injection Pattern.- Part IV Gang of Four Patterns .- Gang of Four Design Patterns.- Gang of Four Patterns Catalogs.- Factory Operation.- Abstract Factory Pattern.- Builder.- Adapter Pattern.- Decorator.- Facade.- Flyweight.- Proxy.- Filter.- Bridge.- Chain of Responsibility.- Command.- Strategy.- Mediator.- Observer.- State.- Visitor.- Memento.- Part V Functional Design Patterns .- Functor.- Applicative Functor.- Monoid Pattern.- Monad Pattern.- Foldable.- Zipper.- Lens Pattern.- View Pattern.- Arrow Pattern.