@extra-array/is-unique.min/README.md

Checks if there are no duplicate values.

Checks if there are no duplicate values.
[:package:](https://www.npmjs.com/package/@extra-array/is-unique)
[:smiley_cat:](https://github.com/orgs/nodef/packages?repo_name=extra-array)
[:running:](https://npm.runkit.com/@extra-array/is-unique)
[:vhs:](https://asciinema.org/a/332084)
[:moon:](https://www.npmjs.com/package/@extra-array/is-unique.min)
[:scroll:](https://unpkg.com/@extra-array/is-unique/)
[:newspaper:](https://nodef.github.io/extra-array/)
[:blue_book:](https://github.com/nodef/extra-array/wiki/)

> Similar: [isUnique], [isDisjoint], [intersection].

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

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

> This is browserified, minified version of [@extra-array/is-unique].<br>
> It is exported as global variable **array_isUnique**.<br>
> CDN: [unpkg], [jsDelivr].

[@extra-array/is-unique]: https://www.npmjs.com/package/@extra-array/is-unique
[unpkg]: https://unpkg.com/@extra-array/is-unique.min
[jsDelivr]: https://cdn.jsdelivr.net/npm/@extra-array/is-unique.min

<br>

```javascript
array.isUnique(x, [fc], [fm]);
// x:  an array
// fc: compare function (a, b)
// fm: map function (v, i, x)
```
> :stopwatch: Compare function => O(n²).

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

var x = [1, 2, -1, -2];
array.isUnique(x);
// true

array.isUnique(x, (a, b) => Math.abs(a) - Math.abs(b));
// false

array.isUnique(x, null, v => Math.abs(v));
// false
```

<br>
<br>


## References

- [Data.List.Unique.isUnique: Haskell](https://hackage.haskell.org/package/Unique-0.4.7.7/docs/Data-List-Unique.html#v:isUnique)
- [List-Extra.allDifferent: elm](https://package.elm-lang.org/packages/elm-community/list-extra/7.1.0/List-Extra#allDifferent)
- [List-Extra.allDifferentBy: elm](https://package.elm-lang.org/packages/elm-community/list-extra/7.1.0/List-Extra#allDifferentBy)
- [is-iterable-uniq: @Richienb](https://www.npmjs.com/package/is-iterable-uniq)

[isUnique]: https://github.com/nodef/extra-array/wiki/isUnique
[isDisjoint]: https://github.com/nodef/extra-array/wiki/isDisjoint
[intersection]: https://github.com/nodef/extra-array/wiki/intersection