@extra-array/swap-update/README.md

Exchanges two values.

Exchanges two values.
[:package:](https://www.npmjs.com/package/@extra-array/swap-update)
[:smiley_cat:](https://github.com/orgs/nodef/packages?repo_name=extra-array)
[:running:](https://npm.runkit.com/@extra-array/swap-update)
[:vhs:](https://asciinema.org/a/332142)
[:moon:](https://www.npmjs.com/package/@extra-array/swap-update.min)
[:scroll:](https://unpkg.com/@extra-array/swap-update/)
[:newspaper:](https://nodef.github.io/extra-array/)
[:blue_book:](https://github.com/nodef/extra-array/wiki/)

> Alternatives: [swap], [swap$].

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

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

<br>

```javascript
array.swap$(x, i, j);
// x: an array (updated)
// i: an index
// j: another index
// → x
```

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

var x = [1, 2, 3, 4];
array.swap$(x, 0, 1);
// [ 2, 1, 3, 4 ]

x;
// [ 2, 1, 3, 4 ]

var x = [1, 2, 3, 4];
array.swap$(x, 0, 3);
// [ 4, 2, 3, 1 ]
```

<br>
<br>


## References

- [List-Extra.swapAt: elm](https://package.elm-lang.org/packages/elm-community/list-extra/7.1.0/List-Extra#swapAt)
- [Collections.swap: Java](https://docs.oracle.com/javase/7/docs/api/java/util/Collections.html#swap(java.util.List,%20int,%20int))
- [pure-swap: @alferov](https://www.npmjs.com/package/pure-swap)

[swap]: https://github.com/nodef/extra-array/wiki/swap
[swap$]: https://github.com/nodef/extra-array/wiki/swap$