Functional programming books overview
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Designed to be concise,  many of Scala's design decisions aimed to address criticisms of Java. Scala source code is intended to be compiled to Java bytecode , so that the resulting executable code runs on a Java virtual machine. Scala provides language interoperability with Java, so that libraries written in either language may be referenced directly in Scala or Java code. Unlike Java, Scala has many features of functional programming languages like Scheme , Standard ML and Haskell , including currying , type inference , immutability , lazy evaluation , and pattern matching. It also has an advanced type system supporting algebraic data types , covariance and contravariance , higher-order types but not higher-rank types , and anonymous types. Other features of Scala not present in Java include operator overloading , optional parameters, named parameters , and raw strings. Conversely, a feature of Java not in Scala is checked exceptions , which has proved controversial.
Scala is a concise, statically typed scripting language that runs on the Java Virtual Machine. It is both a functional programming language and object-oriented language but its emphasis on functional programming sets it apart from Java. The book will help you translate the Java you already know into Scala and kick-start your productivity. Paperback now available on Amazon. Toby is an independent consultant based in London. He specialises in agile enablement, training and modern software development.
This book is about patterns and functional programming in Scala and Clojure. If you're using Java and want to see how functional programming can help.
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Unfortunately, I don't have time anymore to update this list, the last additions were about 2 years ago , This series aims to reorient your perspective toward a functional mindset, helping you look at common problems in new ways and find ways to improve your day-to-day coding. It explores functional programming concepts, frameworks that allow functional programming within the Java language, functional programming languages that run on the JVM, and some future-leaning directions of language design.
The elegant thing here is that the Scala type system helps the author of the above code get this right from a formal point of view, by offering formal type checking. The closest we can do in Java as illustrated by the article is this. The 7 lines of code using instanceof would quickly bloat up to roughly lines of weird interfaces, abstract classes, and cryptic accept and visit methods. When in fact, the functional programming approach was so much leaner, even in its imperfect Java instanceof form! Object orientation was the new holy grail, and people even wanted to push objects down into databases. View all posts by lukaseder. Sure, DP was about OO, but OO then meant large objects and inheritance and the book challenged that by promoting small objects and composition.