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https://github.com/stdlib-js/array-base-flatten2d
Flatten a two-dimensional nested array.
https://github.com/stdlib-js/array-base-flatten2d
2d array flat flatten generic javascript matrix multidimensional ndarray node node-js nodejs stdlib strided utilities utils
Last synced: about 1 month ago
JSON representation
Flatten a two-dimensional nested array.
- Host: GitHub
- URL: https://github.com/stdlib-js/array-base-flatten2d
- Owner: stdlib-js
- License: apache-2.0
- Created: 2023-07-21T22:13:09.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2024-12-10T03:57:14.000Z (about 1 month ago)
- Last Synced: 2024-12-10T04:29:55.841Z (about 1 month ago)
- Topics: 2d, array, flat, flatten, generic, javascript, matrix, multidimensional, ndarray, node, node-js, nodejs, stdlib, strided, utilities, utils
- Language: JavaScript
- Homepage: https://github.com/stdlib-js/stdlib
- Size: 300 KB
- Stars: 1
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md
- Citation: CITATION.cff
- Security: SECURITY.md
Awesome Lists containing this project
README
About stdlib...
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The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.
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To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
# flatten2d
[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url]
> Flatten a two-dimensional nested array.
## Installation
```bash
npm install @stdlib/array-base-flatten2d
```
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 flatten2d = require( '@stdlib/array-base-flatten2d' );
```
#### flatten2d( x, shape, colexicographic )
Flattens a two-dimensional nested array.
```javascript
var x = [ [ 1, 2 ], [ 3, 4 ] ];
var out = flatten2d( x, [ 2, 2 ], false );
// returns [ 1, 2, 3, 4 ]
```
To flatten in colexicographic order, provide a third argument equal to `true`.
```javascript
var x = [ [ 1, 2 ], [ 3, 4 ] ];
var out = flatten2d( x, [ 2, 2 ], true );
// returns [ 1, 3, 2, 4 ]
```
#### flatten2d.assign( x, shape, colexicographic, out, stride, offset )
Flattens a two-dimensional nested array and assigns elements to a provided output array.
```javascript
var Float64Array = require( '@stdlib/array-float64' );
var x = [ [ 1, 2 ], [ 3, 4 ] ];
var out = new Float64Array( 4 );
var y = flatten2d.assign( x, [ 2, 2 ], false, out, 1, 0 );
// returns [ 1, 2, 3, 4 ]
var bool = ( y === out );
// returns true
y = flatten2d.assign( x, [ 2, 2 ], true, out, 1, 0 );
// returns [ 1, 3, 2, 4 ]
```
## Notes
- Both functions assume that all nested arrays have the same length (i.e., the input array is **not** a ragged array).
## Examples
```javascript
var flatten2d = require( '@stdlib/array-base-flatten2d' );
var x = [
[ 1, 2, 3, 4 ],
[ 5, 6, 7, 8 ],
[ 9, 10, 11, 12 ],
[ 13, 14, 15, 16 ]
];
var out = flatten2d( x, [ 0, 0 ], false );
// returns []
out = flatten2d( x, [ 0, 0 ], true );
// returns []
out = flatten2d( x, [ 1, 1 ], false );
// returns [ 1 ]
out = flatten2d( x, [ 1, 1 ], true );
// returns [ 1 ]
out = flatten2d( x, [ 2, 2 ], false );
// returns [ 1, 2, 5, 6 ]
out = flatten2d( x, [ 2, 2 ], true );
// returns [ 1, 5, 2, 6 ]
out = flatten2d( x, [ 3, 3 ], false );
// returns [ 1, 2, 3, 5, 6, 7, 9, 10, 11 ]
out = flatten2d( x, [ 3, 3 ], true );
// returns [ 1, 5, 9, 2, 6, 10, 3, 7, 11 ]
out = flatten2d( x, [ 4, 4 ], false );
// returns [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 ]
out = flatten2d( x, [ 4, 4 ], true );
// returns [ 1, 5, 9, 13, 2, 6, 10, 14, 3, 7, 11, 15, 4, 8, 12, 16 ]
```
* * *
## See Also
- [`@stdlib/array-base/flatten2d-by`][@stdlib/array/base/flatten2d-by]: flatten a two-dimensional nested array according to a callback function.
* * *
## 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 © 2016-2024. The Stdlib [Authors][stdlib-authors].
[npm-image]: http://img.shields.io/npm/v/@stdlib/array-base-flatten2d.svg
[npm-url]: https://npmjs.org/package/@stdlib/array-base-flatten2d
[test-image]: https://github.com/stdlib-js/array-base-flatten2d/actions/workflows/test.yml/badge.svg?branch=main
[test-url]: https://github.com/stdlib-js/array-base-flatten2d/actions/workflows/test.yml?query=branch:main
[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/array-base-flatten2d/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/array-base-flatten2d?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-flatten2d/tree/deno
[deno-readme]: https://github.com/stdlib-js/array-base-flatten2d/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/array-base-flatten2d/tree/umd
[umd-readme]: https://github.com/stdlib-js/array-base-flatten2d/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/array-base-flatten2d/tree/esm
[esm-readme]: https://github.com/stdlib-js/array-base-flatten2d/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/array-base-flatten2d/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/array-base-flatten2d/main/LICENSE
[@stdlib/array/base/flatten2d-by]: https://github.com/stdlib-js/array-base-flatten2d-by