@thi.ng/gp
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Genetic programming helpers & strategies (tree based & multi-expression programming)
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# 
[](https://www.npmjs.com/package/@thi.ng/gp)
[](https://mastodon.thi.ng/@toxi)
> [!NOTE]
> This is one of 209 standalone projects, maintained as part
> of the [@thi.ng/umbrella](https://github.com/thi-ng/umbrella/) monorepo
> and anti-framework.
>
> 🚀 Please help me to work full-time on these projects by [sponsoring me on
> GitHub](https://github.com/sponsors/postspectacular). Thank you! ❤️
- [About](#about)
- [Status](#status)
- [Related packages](#related-packages)
- [Blog posts](#blog-posts)
- [Installation](#installation)
- [Dependencies](#dependencies)
- [Usage examples](#usage-examples)
- [API](#api)
- [Authors](#authors)
- [License](#license)
## About
Genetic programming helpers & strategies (tree based & multi-expression programming).
This package does not (yet) provide a complete GP framework and is
largely focused on the following operations:
- General GP setup configuration
- Genotype / chromosome / AST generation
- Phenotype / chromosome translation
- Offspring generation
- Crossover (single-point, uniform)
- Mutation
Does *not* specifically deal with:
- Population management
- AST evaluation
- Fitness computation
References:
- [Evolutionary failures (blog post)](https://medium.com/@thi.ng/evolutionary-failures-part-1-54522c69be37)
- [Multi Expression Programming (Oltean, Dumitrescu)](https://www.mepx.org/oltean_mep.pdf)
## Status
**ALPHA** - bleeding edge / work-in-progress
[Search or submit any issues for this package](https://github.com/thi-ng/umbrella/issues?q=%5Bgp%5D+in%3Atitle)
## Related packages
- [@thi.ng/defmulti](https://github.com/thi-ng/umbrella/tree/develop/packages/defmulti) - Dynamic, extensible multiple dispatch via user supplied dispatch function.
- [@thi.ng/pointfree](https://github.com/thi-ng/umbrella/tree/develop/packages/pointfree) - Pointfree functional composition / Forth style stack execution engine
- [@thi.ng/sexpr](https://github.com/thi-ng/umbrella/tree/develop/packages/sexpr) - Extensible S-Expression parser & runtime infrastructure
- [@thi.ng/shader-ast](https://github.com/thi-ng/umbrella/tree/develop/packages/shader-ast) - DSL to define shader code in TypeScript and cross-compile to GLSL, JS and other targets
- [@thi.ng/zipper](https://github.com/thi-ng/umbrella/tree/develop/packages/zipper) - Functional tree editing, manipulation & navigation
### Blog posts
- [Evolutionary failures (Part 1)](https://medium.com/@thi.ng/evolutionary-failures-part-1-54522c69be37)
## Installation
```bash
yarn add @thi.ng/gp
```
ESM import:
```ts
import * as gp from "@thi.ng/gp";
```
Browser ESM import:
```html
<script type="module" src="https://esm.run/@thi.ng/gp"></script>
```
[JSDelivr documentation](https://www.jsdelivr.com/)
For Node.js REPL:
```js
const gp = await import("@thi.ng/gp");
```
Package sizes (brotli'd, pre-treeshake): ESM: 1.28 KB
## Dependencies
- [@thi.ng/api](https://github.com/thi-ng/umbrella/tree/develop/packages/api)
- [@thi.ng/errors](https://github.com/thi-ng/umbrella/tree/develop/packages/errors)
- [@thi.ng/math](https://github.com/thi-ng/umbrella/tree/develop/packages/math)
- [@thi.ng/random](https://github.com/thi-ng/umbrella/tree/develop/packages/random)
- [@thi.ng/transducers](https://github.com/thi-ng/umbrella/tree/develop/packages/transducers)
- [@thi.ng/zipper](https://github.com/thi-ng/umbrella/tree/develop/packages/zipper)
Note: @thi.ng/api is in _most_ cases a type-only import (not used at runtime)
## Usage examples
One project in this repo's
[/examples](https://github.com/thi-ng/umbrella/tree/develop/examples)
directory is using this package:
| Screenshot | Description | Live demo | Source |
|:----------------------------------------------------------------------------------------------------------------------|:---------------------------------------------------------|:-----------------------------------------------------|:----------------------------------------------------------------------------------|
| <img src="https://raw.githubusercontent.com/thi-ng/umbrella/develop/assets/examples/shader-ast-evo.jpg" width="240"/> | Evolutionary shader generation using genetic programming | [Demo](https://demo.thi.ng/umbrella/shader-ast-evo/) | [Source](https://github.com/thi-ng/umbrella/tree/develop/examples/shader-ast-evo) |
## API
[Generated API docs](https://docs.thi.ng/umbrella/gp/)
TODO
## Authors
- [Karsten Schmidt](https://thi.ng)
If this project contributes to an academic publication, please cite it as:
```bibtex
@misc{thing-gp,
title = "@thi.ng/gp",
author = "Karsten Schmidt",
note = "https://thi.ng/gp",
year = 2019
}
```
## License
© 2019 - 2025 Karsten Schmidt // Apache License 2.0