npm package: @stdlib/buffer-from-array
Description: Allocate a buffer using an octet array.
Author: The Stdlib Authors
Latest version: 0.2.3

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# array2buffer

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

> Allocate a [buffer][@stdlib/buffer/ctor] using an octet array.

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<section class="intro">

</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/buffer-from-array
```

</section>

<section class="usage">

## Usage

```javascript
var array2buffer = require( '@stdlib/buffer-from-array' );
```

#### array2buffer( arr )

Allocates a [buffer][@stdlib/buffer/ctor] using an `array` (or array-like `object`) of octets.

```javascript
var buf = array2buffer( [ 1, 2, 3, 4 ] );
// returns <Buffer>[ 1, 2, 3, 4 ]
```

</section>

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<section class="notes">

</section>

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<!-- Package usage examples. -->

<section class="examples">

## Examples

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

```javascript
var array2buffer = require( '@stdlib/buffer-from-array' );

var octets;
var buf;
var str;
var i;

// Define a string we want to convert to a buffer:
str = 'this is a string.';

// Manually convert the string to an array of octets...
octets = new Array( str.length );
for ( i = 0; i < str.length; i++ ) {
    octets[ i ] = str.charCodeAt( i ) % 256;
}

// Create a buffer from the octet array:
buf = array2buffer( octets );
console.log( buf.toString() );
```

</section>

<!-- /.examples -->

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* * *

## See Also

-   <span class="package-name">[`@stdlib/buffer-ctor`][@stdlib/buffer/ctor]</span><span class="delimiter">: </span><span class="description">Buffer.</span>
-   <span class="package-name">[`@stdlib/buffer-from-arraybuffer`][@stdlib/buffer/from-arraybuffer]</span><span class="delimiter">: </span><span class="description">allocate a buffer from an ArrayBuffer.</span>
-   <span class="package-name">[`@stdlib/buffer-from-buffer`][@stdlib/buffer/from-buffer]</span><span class="delimiter">: </span><span class="description">copy buffer data to a new Buffer instance.</span>
-   <span class="package-name">[`@stdlib/buffer-from-string`][@stdlib/buffer/from-string]</span><span class="delimiter">: </span><span class="description">allocate a buffer containing a provided string.</span>

</section>

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* * *

## 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

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---

## License

See [LICENSE][stdlib-license].


## Copyright

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

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[@stdlib/buffer/ctor]: https://www.npmjs.com/package/@stdlib/buffer-ctor

[@stdlib/buffer/from-arraybuffer]: https://www.npmjs.com/package/@stdlib/buffer-from-arraybuffer

[@stdlib/buffer/from-buffer]: https://www.npmjs.com/package/@stdlib/buffer-from-buffer

[@stdlib/buffer/from-string]: https://www.npmjs.com/package/@stdlib/buffer-from-string

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