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- [](https://travis-ci.org/fgnass/uniqs)
- ### Tiny utility to create unions and de-duplicated lists.
- Example:
- ```js
- var uniqs = require('uniqs');
- var foo = { foo: 23 };
- var list = [3, 2, 2, 1, foo, foo];
- uniqs(list);
- // => [3, 2, 1, { foo: 23 }]
- ```
- You can pass multiple lists to create a union:
- ```js
- uniqs([2, 1, 1], [2, 3, 3, 4], [4, 3, 2]);
- // => [2, 1, 3, 4]
- ```
- Passing individual items works too:
- ```js
- uniqs(3, 2, 2, [1, 1, 2]);
- // => [3, 2, 1]
- ```
- ### Summary
- * Uniqueness is defined based on strict object equality.
- * The lists do not need to be sorted.
- * The resulting array contains the items in the order of their first appearance.
- ### About
- This package has been written to accompany utilities like
- [flatten](https://npmjs.org/package/flatten) as alternative to full-blown
- libraries like underscore or lodash.
- The implementation is optimized for simplicity rather than performance and
- looks like this:
- ```js
- module.exports = function uniqs() {
- var list = Array.prototype.concat.apply([], arguments);
- return list.filter(function(item, i) {
- return i == list.indexOf(item);
- });
- };
- ```
- ### License
- MIT
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