Functional programming concepts improve predictability, promote code reuse, and manage side effects—the FP’s emphasis on immutability and composability results in more robust and maintainable ...

In Part 2 we’ll revisit those techniques using Java code that pre-dates Java 8. As you’ll see, this code is functional, but it’s not easy to write or read.

The advocates of functional programming say this is example of being able to catch an entire class of errors at compile time, leading to more predictable, reliable, and stable code.

Functions are deterministic In functional programming, given a particular set of inputs, a function always returns the same set of outputs. For example, the following function writing in Clojure is ...

Purely functional programming is a brilliant idea with a misleading name. When people talk about “purely functional programming”, they mean Haskell or something like Haskell.

For the past two years, my day-to-day programming language has been Scala. Scala is a hybrid language that combines the approaches of object-orientation and functional programming.

Built on top of Erlang, Elixir makes it easier to write good functional programming code and harder to mess it up. Here's a first look at this language on the rise.

In “Functional Programming Patterns in Scala and Clojure” from Pragmatic Bookshelf, $36 paper, $24 ebook), readers will use Scala and Clojure to solve in-depth problems and see how familiar ...