In functional programming, there are two varieties of functions: first-order functions and pure functions. First-order functions. A first-order function takes standard data types (string, number, ...

Functional programming with arrays Although JavaScript’s arrays are very capable out of the box, the functional paradigm improves the clarity and maintainability of array code.

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.