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<a name="module_reduce-unique"></a>

## reduce-unique
Reduce an array to unique values, optionally into a separate array.

**Example**  
```js
> const unique = require('reduce-unique')

> const arr = [ 1, 3, 8, 3, 1, 2, 1, 9, 3, 3 ]

> arr.reduce(unique)
[ 1, 3, 8, 2, 9 ]

> arr.reduce(unique, [ 'one', 'two' ])
[ 'one', 'two', 1, 3, 8, 2, 9 ]

> arr.reduce([ 3 ])
3
```

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&copy; 2016-18 Lloyd Brookes \<75pound@gmail.com\>. Documented by [jsdoc-to-markdown](https://github.com/jsdoc2md/jsdoc-to-markdown).