Functional Programming in Kotlin  is a reworked version of the bestselling   Functional Programming in Scala, with all code samples, instructions, and exercises translated into the powerful Kotlin language. In this authoritative guide, you'll take on the challenge of learning functional programming from first principles, and start writing Kotlin code that's easier to read, easier to reuse, better for concurrency, and less prone to bugs and errors. about the technologyKotlin is a new JVM language designed to interoperate with Java and offer an improved developer experience for creating new applications. It's already a top choice for writing web services, and Android apps. Although it preserves Java's OO roots, Kotlin really shines when you adopt a functional programming mindset. By learning the core principles and practices of functional programming outlined in this book, you'll start writing code that's easier to read, easier to test and reuse, better for concurrency, and less prone to bugs. about the book Functional Programming in Kotlin  is a serious tutorial for programmers looking to learn FP and apply it to the everyday business of coding. Based on the bestselling   Functional Programming in Scala, this book guides intermediate Java and Kotlin programmers 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. The book will deliver practical mastery of FP using Kotlin and a valuable perspective on program design that you can apply to other languages.   what's inside Functional programming techniques for real-world applicationsWrite combinator librariesIdentify common structures and idioms in functional designCode for simplicity, modularity, and fewer bugs about the readerFor intermediate Kotlin and Java developers. No experience with functional programming is required. about the author Marco Vermeulen  has almost two decades of programming experience on the JVM, with much of that time spent on functional programming using Scala and Kotlin. Rúnar Bjarnason  and   Paul Chiusano  are the authors of   Functional Programming in Scala, on which this book is based. They are internationally-recognized experts in functional programming and the Scala programming language.