Functional Kotlin

Kotlin is highly regarded for its role in transforming Android and backend development. It stands out for its robust capabilities in functional programming, featuring tools like functional collection processing, DSL builders, scope functions, and context receivers to promote a more intuitive and expressive coding style. Additionally, Kotlin's flexibility supports libraries like Arrow, enhancing a functional approach while ensuring type safety, stability, and performance integrity. As a result, Kotlin is celebrated among developers who are enthusiastic about applying functional programming in practical scenarios.

The book at hand delves into these functional programming aspects of Kotlin, building upon foundational concepts to explore advanced topics. It covers practical subjects such as collection processing, function references, scope functions, the use and creation of DSLs, and context receivers, offering insights into how these elements contribute to a more refined development process.

Targeted towards developers with a basic understanding of Kotlin who wish to expand their knowledge of advanced features, this book does not require a background in math. It serves as a natural progression from the foundational lessons offered in Kotlin Essentials.

Covering a wide array of functional features in Kotlin, the book examines generic variance modifiers, the Covariant Nothing Object pattern, and their limitations. It also discusses interface delegation, custom property delegates, Kotlin stdlib property delegates, Kotlin Contracts, and type mapping between Kotlin and Java. Additionally, it touches upon interoperability annotations, multiplatform development concepts, library implementation, and shared module application development for Android and iOS. Furthermore, the essentials of Kotlin/JS, the reflection of Kotlin elements and types, custom annotation and symbol processors, KSP incremental compilation, and compiler plugin definition are explored.

Notably, the book includes comprehensive static analysis concepts, a look at Kotlin static analyzers, and guides for defining custom Detekt rules. Among the practical projects featured are a type-safe task update class using the Covariant Nothing Object pattern, a logging property delegate, an object serializer, a generic types random value generator, an annotation processor for interface generation, a Kotlin Symbol Processor for interface generation, and a Detekt rule identifying the use of System.out.println. The details provided stem from the publisher's description.