npm package: @stdlib/utils-unzip
Description: Unzip a zipped array (i.e., a nested array of tuples).
Author: The Stdlib Authors
Latest version: 0.2.3

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<details>
  <summary>
    About stdlib...
  </summary>
  <p>We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.</p>
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</details>

# Unzip

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

> Unzip a [zipped array][@stdlib/utils/zip] (i.e., a nested array of tuples).

<section class="intro">

</section>

<!-- /.intro -->

<section class="installation">

## Installation

```bash
npm install @stdlib/utils-unzip
```

</section>

<section class="usage">

## Usage

```javascript
var unzip = require( '@stdlib/utils-unzip' );
```

#### unzip( arr\[, idx] )

Unzips a [zipped array][@stdlib/utils/zip] (i.e., a nested `array` of tuples).

```javascript
var arr = [ [ 1, 'a', 3 ], [ 2, 'b', 4 ] ];

var out = unzip( arr );
// returns [ [ 1, 2 ], [ 'a', 'b' ], [ 3, 4 ] ];
```

To unzip specific tuple elements, you can provide an `array` of indices as an optional second argument.

```javascript
var arr = [ [ 1, 'a', 3 ], [ 2, 'b', 4 ] ];

var out = unzip( arr, [ 0, 2 ] );
// returns [ [ 1, 2 ], [ 3, 4 ] ];
```

</section>

<!-- /.usage -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var discreteUniform = require( '@stdlib/random-base-discrete-uniform' );
var filled2dBy = require( '@stdlib/array-base-filled2d-by' );
var unzip = require( '@stdlib/utils-unzip' );

function random( indices ) {
    var j = indices[ 1 ] * 100;
    return discreteUniform( j, j+100 );
}

var arr = filled2dBy( [ 100, 5 ], random );
console.dir( arr );

var out = unzip( arr );
console.dir( out );
```

</section>

<!-- /.examples -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/utils-zip`][@stdlib/utils/zip]</span><span class="delimiter">: </span><span class="description">generate array tuples from input arrays.</span>

</section>

<!-- /.related -->

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<section class="main-repo" >

* * *

## 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 &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

</section>

<!-- /.stdlib -->

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<section class="links">

[npm-image]: http://img.shields.io/npm/v/@stdlib/utils-unzip.svg
[npm-url]: https://npmjs.org/package/@stdlib/utils-unzip

[test-image]: https://github.com/stdlib-js/utils-unzip/actions/workflows/test.yml/badge.svg?branch=v0.2.3
[test-url]: https://github.com/stdlib-js/utils-unzip/actions/workflows/test.yml?query=branch:v0.2.3

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/utils-unzip/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/utils-unzip?branch=main

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-->

[chat-image]: https://img.shields.io/badge/zulip-join_chat-brightgreen.svg
[chat-url]: https://stdlib.zulipchat.com

[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/utils-unzip/tree/deno
[deno-readme]: https://github.com/stdlib-js/utils-unzip/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/utils-unzip/tree/umd
[umd-readme]: https://github.com/stdlib-js/utils-unzip/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/utils-unzip/tree/esm
[esm-readme]: https://github.com/stdlib-js/utils-unzip/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/utils-unzip/blob/main/branches.md

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/utils-unzip/main/LICENSE

<!-- <related-links> -->

[@stdlib/utils/zip]: https://www.npmjs.com/package/@stdlib/utils-zip

<!-- </related-links> -->

</section>

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