Best Books For Functional Programming (Functional programming forum at Coderanch)Unfortunately, I don't have time anymore to update this list, the last additions were about 2 years ago The first variant of this article was published in the first issue of Russian magazine " Practice of functional programming ", but I decided to continue to maintain it, as more books were released Russian version of this article also includes description of books published in Russian. You can leave comments and suggestions in the comment widget on this page, or send them to me via e-mail Updates to this page usually happening not so often — every months. Descriptions for the books are relatively short — just to give an overview of the book's topics, otherwise this article will become too big. For some of books there are more detailed reviews published in my blog. You can also follow my reviews on Goodreads.
Functional patterns for scala beginners
Scala (programming language)
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.
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.
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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.