README.md

# union-value [![NPM version](https://img.shields.io/npm/v/union-value.svg?style=flat)](https://www.npmjs.com/package/union-value) [![NPM monthly downloads](https://img.shields.io/npm/dm/union-value.svg?style=flat)](https://npmjs.org/package/union-value)  [![NPM total downloads](https://img.shields.io/npm/dt/union-value.svg?style=flat)](https://npmjs.org/package/union-value) [![Linux Build Status](https://img.shields.io/travis/jonschlinkert/union-value.svg?style=flat&label=Travis)](https://travis-ci.org/jonschlinkert/union-value)

> Set an array of unique values as the property of an object. Supports setting deeply nested properties using using object-paths/dot notation.

## Install

Install with [npm](https://www.npmjs.com/):

```sh
$ npm install --save union-value
```

## Usage

```js
var union = require('union-value');

var obj = {};

union(obj, 'a.b.c', ['one', 'two']);
union(obj, 'a.b.c', ['three']);

console.log(obj);
//=> {a: {b: {c: [ 'one', 'two', 'three' ] }}}
```

## About

### Related projects

* [assign-value](https://www.npmjs.com/package/assign-value): Assign a value or extend a deeply nested property of an object using object path… [more](https://github.com/jonschlinkert/assign-value) | [homepage](https://github.com/jonschlinkert/assign-value "Assign a value or extend a deeply nested property of an object using object path notation.")
* [get-value](https://www.npmjs.com/package/get-value): Use property paths (`a.b.c`) to get a nested value from an object. | [homepage](https://github.com/jonschlinkert/get-value "Use property paths (`a.b.c`) to get a nested value from an object.")
* [has-value](https://www.npmjs.com/package/has-value): Returns true if a value exists, false if empty. Works with deeply nested values using… [more](https://github.com/jonschlinkert/has-value) | [homepage](https://github.com/jonschlinkert/has-value "Returns true if a value exists, false if empty. Works with deeply nested values using object paths.")
* [set-value](https://www.npmjs.com/package/set-value): Create nested values and any intermediaries using dot notation (`'a.b.c'`) paths. | [homepage](https://github.com/jonschlinkert/set-value "Create nested values and any intermediaries using dot notation (`'a.b.c'`) paths.")
* [unset-value](https://www.npmjs.com/package/unset-value): Delete nested properties from an object using dot notation. | [homepage](https://github.com/jonschlinkert/unset-value "Delete nested properties from an object using dot notation.")

### Contributing

Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new).

### Building docs

_(This project's readme.md is generated by [verb](https://github.com/verbose/verb-generate-readme), please don't edit the readme directly. Any changes to the readme must be made in the [.verb.md](.verb.md) readme template.)_

To generate the readme, run the following command:

```sh
$ npm install -g verbose/verb#dev verb-generate-readme && verb
```

### Running tests

Running and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command:

```sh
$ npm install && npm test
```

### Author

**Jon Schlinkert**

* [github/jonschlinkert](https://github.com/jonschlinkert)
* [twitter/jonschlinkert](https://twitter.com/jonschlinkert)

### License

Copyright © 2017, [Jon Schlinkert](https://github.com/jonschlinkert).
Released under the [MIT License](LICENSE).

***

_This file was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme), v0.4.2, on February 25, 2017._