# Jaccard

Very simple package for measuring the similarity of two sets by their shared members.
The module exports a single function that accepts two arrays of attributes and returns their [Jaccard Index](https://en.wikipedia.org/wiki/Jaccard_index).

## Installation
```
$ npm install jaccard-array
```

## Usage

```javascript
const jaccard = require('jaccard-array');


var setA, setB, similarity;

// find the similarity of two movies based on the people that liked them
setA = ['Sara', 'Tom', 'Steve', 'Peter', 'Allison', 'Anne'];
setB = ['Fred', 'Dan', 'Steve', 'Peter', 'Allison'];

similarity = jaccard(setA, setB);

```