dash

A modern list API for Emacs.

Dash is a utility library that affords functional programming
patterns inspired by Clojure, particularly in the realm of list
manipulation.  Examples include higher-order functions (map, reduce,
filter) and derivatives (drop, flatten, sum); function combinators
(partial application, argument flipping, composition); and threading
and anaphoric macros with destructuring support.

Dash is particularly useful in providing a broad and consistent API
across many Emacs versions.

Documentation and examples are in the manual at Info node `(dash) Top'
and on the web at https://elpa.gnu.org/packages/doc/dash.html, as well
as in the project’s README.md file.