npm package: @stdlib/array-base-join
Description: Return a string created by joining array elements using a specified separator.
Author: The Stdlib Authors
Latest version: 0.1.2

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<details>
  <summary>
    About stdlib...
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  <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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# join

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

> Return a string created by joining array elements using a specified separator.

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<section class="intro">

</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/array-base-join
```

</section>

<section class="usage">

## Usage

```javascript
var join = require( '@stdlib/array-base-join' );
```

#### join( x, separator )

Returns a string created by joining array elements using a specified separator.

```javascript
var x = [ 1, 2, 3, 4, 5, 6 ];

var out = join( x, ',' );
// returns '1,2,3,4,5,6'
```

</section>

<!-- /.usage -->

<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

## Notes

-   If provided an array-like object having a `join` method, the function defers execution to that method and assumes that the method API has the following signature:

    ```text
    x.join( separator )
    ```

-   If provided an array-like object without a `join` method, the function manually constructs the output string.

-   If an array element is either `null` or `undefined`, the function will serialize the element as an empty string.

</section>

<!-- /.notes -->

<!-- Package usage examples. -->

<section class="examples">

## Examples

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

```javascript
var Complex128Array = require( '@stdlib/array-complex128' );
var Complex64Array = require( '@stdlib/array-complex64' );
var AccessorArray = require( '@stdlib/array-base-accessor' );
var Float64Array = require( '@stdlib/array-float64' );
var join = require( '@stdlib/array-base-join' );

var x = [ 0, 1, 2, 3, 4, 5 ];
var s = join( x, ',' );
// returns '0,1,2,3,4,5'

x = new Float64Array( [ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0 ] );
s = join( x, ',' );
// returns '0,1,2,3,4,5'

s = join( x, '-' );
// returns '0-1-2-3-4-5'

x = new AccessorArray( [ 1, 2, 3, 4 ] );
s = join( x, ',' );
// returns '1,2,3,4'

x = new Complex128Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] );
s = join( x, ',' );
// returns '1 + 2i,3 + 4i,5 + 6i'

x = new Complex64Array( [ 1.0, -1.0, 2.0, -2.0 ] );
s = join( x, ',' );
// returns '1 - 1i,2 - 2i'
```

</section>

<!-- /.examples -->

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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>

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

[test-image]: https://github.com/stdlib-js/array-base-join/actions/workflows/test.yml/badge.svg?branch=v0.1.2
[test-url]: https://github.com/stdlib-js/array-base-join/actions/workflows/test.yml?query=branch:v0.1.2

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/array-base-join/main.svg
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[stdlib]: https://github.com/stdlib-js/stdlib

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

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

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