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hnswlib-node

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hnswlib-node provides Node.js bindings for Hnswlib

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- - build.yml
  - commitlint.yml
  - tsd.yml
- dependabot.yml
- commit-msg
- index.d.ts
- index.js
- index.test-d.ts
- - bruteforce.h
  - hnswalg.h
  - hnswlib.h
  - LICENSE
  - space_ip.h
  - space_l2.h
  - stop_condition.h
  - visited_list_pool.h
- addon.cc
- BruteforceSearch.test.js
- HierarchicalNSW.test.js
- InnerProductSpace.test.js
- L2Space.test.js
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biome.json
CHANGELOG.md
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package.json
README.md
tsconfig.json
vitest.config.mjs

# Installation Guide

1. Get the code

git clone https://github.com/yoshoku/hnswlib-node

Downloads the entire project code from GitHub to your computer.

cd hnswlib-node

Moves into the project folder you just downloaded.

2. Node.js

Easy Recommended

Prerequisites

Git Needed to download the project code from GitHub.
Node.js Node.js must be installed to use npm. The LTS version is recommended.

$ npm install hnswlib-node

Downloads and installs the libraries listed in package.json.

✅ After running the command, open the address shown in the terminal (usually something like http://localhost:3000) in your browser.

Pulled directly from this repo's README.

// repository documentation

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# hnswlib-node

[![npm version](https://badge.fury.io/js/hnswlib-node.svg)](https://badge.fury.io/js/hnswlib-node)
[![Build Status](https://github.com/yoshoku/hnswlib-node/actions/workflows/build.yml/badge.svg)](https://github.com/yoshoku/hnswlib-node/actions/workflows/build.yml)
[![License](https://img.shields.io/badge/License-Apache%202.0-yellowgreen.svg)](https://github.com/yoshoku/hnswlib-node/blob/main/LICENSE.txt)
[![Documentation](https://img.shields.io/badge/api-reference-blue.svg)](https://yoshoku.github.io/hnswlib-node/doc/)

hnswlib-node provides Node.js bindings for [Hnswlib](https://github.com/nmslib/hnswlib)
that implements approximate nearest-neighbor search based on
hierarchical navigable small world graphs.

## Installation

```sh
$ npm install hnswlib-node
```

## Documentation

* [hnswlib-node API Documentation](https://yoshoku.github.io/hnswlib-node/doc/)
* [How to run hnswlib-node on AWS Lambda](https://github.com/yoshoku/hnswlib-node/wiki/How-to-run-hnswlib-node-on-AWS-Lambda)

## Usage

Generating search index:

```typescript
import { HierarchicalNSW } from 'hnswlib-node';

const numDimensions = 8; // the length of data point vector that will be indexed.
const maxElements = 10; // the maximum number of data points.

// declaring and intializing index.
const index = new HierarchicalNSW('l2', numDimensions);
index.initIndex(maxElements);

// inserting data points to index.
for (let i = 0; i < maxElements; i++) {
  const point = new Array(numDimensions);
  for (let j = 0; j < numDimensions; j++) point[j] = Math.random();
  index.addPoint(point, i);
}

// saving index.
index.writeIndexSync('foo.dat');
```

Searching nearest neighbors:

```typescript
import { HierarchicalNSW } from 'hnswlib-node';

// loading index.
const index = new HierarchicalNSW('l2', 3);
index.readIndexSync('foo.dat');

// preparing query data points.
const numDimensions = 8;
const query = new Array(numDimensions);
for (let j = 0; j < numDimensions; j++) query[j] = Math.random();

// searching k-nearest neighbor data points.
const numNeighbors = 3;
const result = index.searchKnn(query, numNeighbors);

console.table(result);
```

## License

hnswlib-node is available as open source under the terms of the [Apache-2.0 License](https://www.apache.org/licenses/LICENSE-2.0).

## Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/yoshoku/hnswlib-node.
This project is intended to be a safe, welcoming space for collaboration,
and contributors are expected to adhere to the [Contributor Covenant](https://contributor-covenant.org) code of conduct.