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what is higher fr?

xvilka/higher — explained in plain English

Analysis updated 2026-07-18 · repo last pushed 2019-12-23

Audience · developerComplexity · 4/5DormantSetup · easy

tl;dr

An OCaml library that lets you write one function that works across list, array, tree, or any container type, using a pattern called higher-kinded polymorphism.

vibe map

mindmap
  root((higher))
    What it does
      Higher-kinded polymorphism
      Generic over container types
      Based on 2014 research paper
    Tech Stack
      OCaml
      opam
    Use Cases
      Write generic transforms
      Build flexible abstractions
      Port Haskell patterns
    Related Languages
      TypeScript
      Java
      Swift
    Audience
      Library authors
      Framework builders

Code map

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filefunction / class

what do people make with this?

VIBE 1

Write one transform function that works over lists, arrays, and trees without duplicating code

VIBE 2

Build reusable abstractions for an OCaml library or framework that need to stay generic

VIBE 3

Port a higher-kinded pattern you know from Haskell, TypeScript, or Swift into OCaml

VIBE 4

Reduce repeated boilerplate in code that operates across multiple container types

what's the stack?

OCamlopam

how it stacks up fr

xvilka/higher0verflowme/alarm-clock0verflowme/seclists
Language—CSS—
Last pushed2019-12-232022-10-032020-05-03
MaintenanceDormantDormantDormant
Setup difficultyeasyeasyeasy
Complexity4/52/51/5
Audiencedevelopervibe coderops devops

Figures from each repo's GitHub metadata at analysis time.

how do i run it?

Difficulty · easy time til it works · 30min

prompts (copy fr)

prompt 1
Show me an example of writing a container-generic map function in OCaml using the higher library
prompt 2
Explain how higher-kinded polymorphism works in this library compared to how it works in Haskell
prompt 3
Help me install and set up the higher library with opam in my OCaml project
prompt 4
Walk me through porting a TypeScript higher-kinded type pattern to OCaml using this library

Frequently asked questions

what is higher fr?

An OCaml library that lets you write one function that works across list, array, tree, or any container type, using a pattern called higher-kinded polymorphism.

Is higher actively maintained?

Dormant — no commits in 2+ years (last push 2019-12-23).

How hard is higher to set up?

Setup difficulty is rated easy, with roughly 30min to a first successful run.

Who is higher for?

Mainly developer.

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