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- # union-value [](https://www.npmjs.com/package/union-value) [](https://npmjs.org/package/union-value) [](https://npmjs.org/package/union-value) [](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._
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