# magnars/dash.el

A modern list library for Emacs

Repository: https://github.com/magnars/dash.el
Canonical: https://ross.abutalabs.com/products/dashel
Language: Emacs Lisp
License: GPL-3.0
License Family: copyleft
Last push: 2026-08-10T18:03:24+00:00

## Health v2 (maintenance only)
Score: 66/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 97, release rhythm 8, longevity 100
- inputs: {"age_days": 5063, "days_push": 23, "days_rel": 539, "gap_med": null, "n_releases_24m": 1}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1745, forks 138 (observed 2026-08-28T04:05:30.654310+00:00)

## What it is
dash.el is a modern list manipulation library for Emacs Lisp, providing a rich functional-style list API without requiring the cl library. It includes anaphoric macro variants and tooling like fontification and Info symbol lookup support.

## Use cases
- manipulate lists in Emacs Lisp with map/filter/reduce functions
- avoid using cl-lib for list operations in Emacs packages
- write more readable functional-style Elisp code
- add a modern list API dependency to an Emacs package
- fontify dash variables like it and acc in Elisp buffers

## When to choose
- you are writing Emacs Lisp and need expressive list processing functions
- you want a well-maintained, widely-used list library available on GNU ELPA and MELPA
- you prefer functional-style list operations without cl-lib dependencies

## When to avoid
- you are not programming in Emacs Lisp
- you only need basic built-in list functions and want zero dependencies

## Facets
- artifact type: library
- maturity: stable
- function: developer-tools
- domain: developer-tools, programming-languages
- platform: -
- tags: emacs-lisp, list-library, functional-programming, emacs

## Member repositories
- magnars/dash.el (main) score 66

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:30.654310+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:29:14.801764+00:00, confidence not recorded.
  - readme: https://github.com/magnars/dash.el (fetched 2026-08-28T04:05:30.654310+00:00, sha f92efcfbdf3e)
- Data as of 2026-08-30T08:39:29.467469+00:00.