https://github.com/s-taylor/youneek
a function to filter unique (you-neek) values
https://github.com/s-taylor/youneek
Last synced: about 2 months ago
JSON representation
a function to filter unique (you-neek) values
- Host: GitHub
- URL: https://github.com/s-taylor/youneek
- Owner: s-taylor
- License: mit
- Created: 2019-05-31T07:26:23.000Z (about 6 years ago)
- Default Branch: master
- Last Pushed: 2019-07-15T12:40:58.000Z (almost 6 years ago)
- Last Synced: 2025-04-22T06:44:54.766Z (about 2 months ago)
- Language: JavaScript
- Size: 160 KB
- Stars: 5
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# youneek
A function to filter unique (you-neek) values
## Why?
You can read about it on [Medium](https://medium.com/@simontaylorau/filter-unique-in-javascript-226007247354)
## How to use it?
`npm install youneek`
```js
const unique = require('youneek');
const arr = [1,2,3,4,1,3,5,8,9,9];
/* Make sure you call unique! See why below */
const result = arr.filter(unique());
// result === [1, 2, 3, 4, 5, 8, 9];
```
### Copy Paste
Though to be honest, you could copy and paste this. It's really small and I won't begrudge you for doing that, but maybe give me a star?
```js
const unique = () => {
let cache;
return (elem, index, array) => {
if (!cache) cache = new Set(array);
return cache.delete(elem);
};
};
```
## Try it out
Try it out with [runkit](https://runkit.com/nizmox/5d0bf825fda884001a41f6e7)
## Older browsers
This package uses `new Set`. If you are on an older browser you may need a polyfill.
* [Set support](https://kangax.github.io/compat-table/es6/#test-Set)
* [Polyfill with core-js](https://github.com/zloirock/core-js)