@extra-array/unique-on

Removes duplicate values. [:running:] [:vhs:] [:package:] [:moon:]
> Alternatives: [compare], [map].

> This is part of package [extra-array].

[extra-array]: https://www.npmjs.com/package/extra-array

``javascript
array.uniqueOn(x, [fn], [ths]);
// x: an array
// fn: map function (v, i, x)
// ths: this argument
`

`javascript
const array = require('extra-array');

var x = [1, 2, 3, 4, 2, 3];
array.uniqueOn(x);
// [1, 2, 3, 4]

var x = [1, 2, 3, 4, -2, -3];
array.uniqueOn(x, v => Math.abs(v));
// [1, 2, 3, 4]
``

$3

- Data.List.nub: Haskell
- List-Extra.unique: elm
- List-Extra.uniqueBy: elm
- _.uniq: lodash

[compare]: https://github.com/nodef/extra-array/wiki/unique
[map]: https://github.com/nodef/extra-array/wiki/uniqueOn
[:running:]: https://npm.runkit.com/@extra-array/unique-on
[:package:]: https://www.npmjs.com/package/@extra-array/unique-on
[:moon:]: https://www.npmjs.com/package/@extra-array/unique-on.min
[:vhs:]: https://asciinema.org/a/319446