Første kvalitet Functional Programming Patterns in Scala and Clojure: Write Lean Programs for the JVM (Paperback) by Bevilacqua-Linn Michael OtYRvaIG

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Solve real-life programming problems with a fraction of the code that pure object-oriented programming requires. Use Scala and Clojure to solve in-depth problems with two sets of patterns: object-oriented patterns that become more concise with functional programming and natively functional patterns. Your code will be more declarative with fewer bugs and lower maintenance costs. Functional languages have their own patterns that enable you to solve problems with less code than object-oriented programming alone. This book introduces you the experienced Java programmer to Scala and Clojure: practical production-quality languages that run on the JVM and interoperate with existing Java. By using both the statically typed type-inferred Scala and the dynamically typed modern Lisp Clojure you'll gain a broad understanding of functional programming. For each pattern you'll first see the traditional object-oriented solution and then dig into the functional replacements in both Scala and Clojure. These patterns are common in the functional world and deserve to become part of your problem-solving toolkit. On the object-oriented side you'll see many common patterns such as Command Strategy and Null Object. On the functional side you'll learn core functional patterns such as Memoization Lazy Sequence and Tail Recursion. Each pattern helps you solve a common programming problem. Working through them gives you a set of patterns you can use to solve problems you come across while writing programs. Finally you'll learn how to work your existing Java code into new Scala or Clojure projects. You can start off small adding functional code little by little so you can complement your existing knowledge with Scala and Clojure as these languages gain popularity on the JVM.