# 4clojure/4clojure

An interactive problem website for learning Clojure

Repository: https://github.com/4clojure/4clojure
Canonical: https://ross.abutalabs.com/products/4clojure
Homepage: https://www.4clojure.com
Language: Clojure
License: EPL-1.0
License Family: copyleft
Archived: true
Last push: 2021-08-08T10:25:33+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5622, "days_push": 1851, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1068, forks 221 (observed 2026-08-28T04:03:27.389516+00:00)

## What it is
4Clojure is an interactive website for learning Clojure through problem-solving exercises, built with Clojure, Leiningen, and MongoDB. The hosted site at 4clojure.com has been discontinued, though the source can still be run locally.

## Use cases
- learn clojure by solving interactive problems
- practice functional programming exercises
- run a coding challenge site locally
- find clojure katas and lisp problems
- teach clojure with hands-on puzzles

## When to choose
- you want to self-host a clojure exercise site
- you want to browse the problem set source data
- you want to study how an interactive coding site is built in clojure

## When to avoid
- you want a live hosted practice site - 4clojure.com is down
- you need a maintained tool with active support
- you want exercises for languages other than clojure

## Facets
- artifact type: application
- maturity: abandoned
- function: web-framework, testing
- domain: education, programming-languages, web-development
- platform: jvm-scripting, self-hosted
- tags: clojure, learning, coding-exercises, interactive-problems, discontinued, education, web-server

## Member repositories
- 4clojure/4clojure (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:27.389516+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 2026-08-30T06:54:36.682456+00:00, confidence not recorded.
  - readme: https://github.com/4clojure/4clojure (fetched 2026-08-28T04:03:27.389516+00:00, sha 149b2034f449)
- Data as of 2026-08-30T08:39:29.467469+00:00.