Clojure

Clojure (pronunciation: /ˈkloʊʒɜːr/, like "closure") is a dialect of the Lisp programming language created by Rich Hickey. Clojure is a general-purpose programming language with an emphasis on functional programming. It runs on the Java Virtual Machine, Common Language Runtime, and JavaScript engines. Like other Lisps, Clojure treats code as data and has a macro system. The current development process is community-driven, overseen by Rich Hickey as its BDFL.

Clojure encourages immutability and immutable data structures. While its type system is entirely dynamic, recent efforts have also sought the implementation of gradual typing. Clojure encourages programmers to be explicit about managing state and identity. This focus on programming with immutable values and explicit progression-of-time constructs are intended to facilitate the development of more robust programs, particularly multithreaded ones.

Clojure is successfully used in industry by companies such as Walmart,Puppet Labs, and other large software companies. Commercial support for Clojure is provided by Cognitect. Annual Clojure conferences are organised every year across the globe, the most famous of them being Clojure/conj (US east coast), Clojure/West (US west coast), and EuroClojure (Europe).