# funkia/list

🐆 An immutable list with unmatched performance and a comprehensive functional API.

Repository: https://github.com/funkia/list
Canonical: https://ross.abutalabs.com/products/funkia-list
Language: TypeScript
License: MIT
License Family: permissive
Topics: functional-programming, data-structures, immutable, ramda, fantasy-land, immutable-lists, redux
Last push: 2024-01-15T10:31:01+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3640, "days_push": 961, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1650, forks 51 (observed 2026-08-28T04:05:16.837341+00:00)

## What it is
List is a TypeScript library providing a fast immutable list data structure implemented with relaxed radix balanced trees. It offers a comprehensive functional API with curried functions, chainable methods, and seamless Ramda integration.

## Use cases
- use immutable lists instead of arrays in functional JavaScript code
- avoid accidental mutation bugs in Redux state updates
- get faster functional list operations than native arrays
- use curried list functions with Ramda-style pipelines
- write type-safe list transformations in TypeScript
- tree-shake a lightweight immutable collection library into a bundle

## When to choose
- you need immutable, persistent list semantics with strong performance
- you write functional-style code and want currying and Ramda compatibility
- you want a focused library that does one data structure well

## When to avoid
- you need many different data structures like maps or sets in one package
- you mainly mutate arrays in place and don't need immutability
- you need a library with frequent updates or large community activity

## Facets
- artifact type: library
- maturity: stable
- function: serialization
- domain: developer-tools, web-development
- platform: browser, cross-platform
- tags: immutable-list, functional-programming, data-structures, typescript, ramda, fantasy-land, persistent-data-structure, redux, algorithms, nodejs

## Member repositories
- funkia/list (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:16.837341+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 2026-08-30T03:45:04.921513+00:00, confidence not recorded.
  - readme: https://github.com/funkia/list (fetched 2026-08-28T04:05:16.837341+00:00, sha ef31ff3a5263)
  - registry_npm: https://registry.npmjs.org/list (fetched 2026-08-29T11:18:19.039541+00:00, sha 95513a8a5fde)
- Data as of 2026-08-30T08:39:29.467469+00:00.