# uiua-lang/uiua

A tacit array programming language

Repository: https://github.com/uiua-lang/uiua
Canonical: https://ross.abutalabs.com/products/uiua
Homepage: https://www.uiua.org
Language: Rust
License: MIT
License Family: permissive
Topics: apl, array-programming, rust, tacit, uiua
Last push: 2026-08-26T18:01:51+00:00

## Health v2 (maintenance only)
Score: 87/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 70, longevity 91
- inputs: {"age_days": 1283, "days_push": 7, "days_rel": 200, "gap_med": 4, "n_releases_24m": 14}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2157, forks 176 (observed 2026-08-28T04:06:19.801533+00:00)

## What it is
Uiua is a tacit, stack-based array programming language implemented in Rust, inspired by APL. It ships as a local interpreter/REPL with a built-in language server for editor integration, plus an online interpreter at uiua.org.

## Use cases
- write tacit array programs
- learn array programming like APL
- run a REPL for an array language
- experiment with stack-based point-free code
- integrate an array language into an editor via LSP
- do concise data/array manipulation

## When to choose
- you want a modern APL-like array language with active development
- you prefer tacit/point-free programming style
- you need a cross-platform interpreter with editor tooling

## When to avoid
- you need a mainstream production language with large ecosystems
- you dislike stack-based or symbol-heavy syntax
- you need long-term stability guarantees for critical systems

## Facets
- artifact type: cli-tool
- maturity: active
- function: interpreter, programming-language, cli
- domain: programming-languages
- platform: windows, rust, cli, cross-platform
- tags: array-programming, tacit-programming, apl-inspired, stack-based, language-server, repl, arrays, command-line, linux, macos

## Member repositories
- uiua-lang/uiua (main) score 87

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:19.801533+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 2026-08-30T02:50:26.481999+00:00, confidence not recorded.
  - readme: https://github.com/uiua-lang/uiua (fetched 2026-08-28T04:06:19.801533+00:00, sha a07cb4f5f008)
  - homepage: https://www.uiua.org (fetched 2026-08-29T10:30:27.803378+00:00, sha 71f84adcd741)
  - registry_crates: https://crates.io/api/v1/crates/uiua (fetched 2026-08-29T10:30:27.817092+00:00, sha 4af373c59a0e)
- Data as of 2026-08-30T08:39:29.467469+00:00.