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https://github.com/stdlib-js/array-base-cartesian-square

Return the Cartesian square.
https://github.com/stdlib-js/array-base-cartesian-square

array cartesian generic javascript math mathematics node node-js nodejs ordered sets stdlib utilities utils

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Return the Cartesian square.

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# cartesianSquare

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url]

> Return the [Cartesian square][cartesian-product].

## Installation

```bash
npm install @stdlib/array-base-cartesian-square
```

Alternatively,

- To load the package in a website via a `script` tag without installation and bundlers, use the [ES Module][es-module] available on the [`esm`][esm-url] branch (see [README][esm-readme]).
- If you are using Deno, visit the [`deno`][deno-url] branch (see [README][deno-readme] for usage intructions).
- For use in Observable, or in browser/node environments, use the [Universal Module Definition (UMD)][umd] build available on the [`umd`][umd-url] branch (see [README][umd-readme]).

The [branches.md][branches-url] file summarizes the available branches and displays a diagram illustrating their relationships.

To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.

## Usage

```javascript
var cartesianSquare = require( '@stdlib/array-base-cartesian-square' );
```

#### cartesianSquare( x )

Returns the [Cartesian square][cartesian-product].

```javascript
var x = [ 1, 2 ];

var out = cartesianSquare( x );
// returns [ [ 1, 1 ], [ 1, 2 ], [ 2, 1 ], [ 2, 2 ] ]
```

If provided an empty array, the function returns an empty array.

```javascript
var out = cartesianSquare( [] );
// returns []
```

## Examples

```javascript
var linspace = require( '@stdlib/array-base-linspace' );
var cartesianSquare = require( '@stdlib/array-base-cartesian-square' );

var x = linspace( 0, 5, 6 );

var out = cartesianSquare( x );
// returns [ [ 0, 0 ], [ 0, 1 ], ..., [ 5, 4 ], [ 5, 5 ] ]
```

* * *

## See Also

- [`@stdlib/array-cartesian-square`][@stdlib/array/cartesian-square]: return the Cartesian square.
- [`@stdlib/array-base/cartesian-power`][@stdlib/array/base/cartesian-power]: return the Cartesian power.
- [`@stdlib/array-base/cartesian-product`][@stdlib/array/base/cartesian-product]: return the Cartesian product.

* * *

## Notice

This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].

#### Community

[![Chat][chat-image]][chat-url]

---

## License

See [LICENSE][stdlib-license].

## Copyright

Copyright © 2016-2025. The Stdlib [Authors][stdlib-authors].

[npm-image]: http://img.shields.io/npm/v/@stdlib/array-base-cartesian-square.svg
[npm-url]: https://npmjs.org/package/@stdlib/array-base-cartesian-square

[test-image]: https://github.com/stdlib-js/array-base-cartesian-square/actions/workflows/test.yml/badge.svg?branch=main
[test-url]: https://github.com/stdlib-js/array-base-cartesian-square/actions/workflows/test.yml?query=branch:main

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/array-base-cartesian-square/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/array-base-cartesian-square?branch=main

[chat-image]: https://img.shields.io/gitter/room/stdlib-js/stdlib.svg
[chat-url]: https://app.gitter.im/#/room/#stdlib-js_stdlib:gitter.im

[stdlib]: https://github.com/stdlib-js/stdlib

[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors

[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules

[deno-url]: https://github.com/stdlib-js/array-base-cartesian-square/tree/deno
[deno-readme]: https://github.com/stdlib-js/array-base-cartesian-square/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/array-base-cartesian-square/tree/umd
[umd-readme]: https://github.com/stdlib-js/array-base-cartesian-square/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/array-base-cartesian-square/tree/esm
[esm-readme]: https://github.com/stdlib-js/array-base-cartesian-square/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/array-base-cartesian-square/blob/main/branches.md

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/array-base-cartesian-square/main/LICENSE

[cartesian-product]: https://en.wikipedia.org/wiki/Cartesian_product

[@stdlib/array/cartesian-square]: https://github.com/stdlib-js/array-cartesian-square

[@stdlib/array/base/cartesian-power]: https://github.com/stdlib-js/array-base-cartesian-power

[@stdlib/array/base/cartesian-product]: https://github.com/stdlib-js/array-base-cartesian-product