npm package: @stdlib/array-base-accessors
Description: Return element accessors for a provided array-like object.
Author: The Stdlib Authors
Latest version: 0.2.3

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# accessors

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

> Return element accessors for a provided array-like object.

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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-accessors
```

</section>

<section class="usage">

## Usage

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

#### accessors( x )

Returns element accessors for a provided array-like object.

```javascript
var obj = accessors( [ 1, 2, 3, 4 ] );
// returns {...}

var bool = obj.accessorProtocol;
// returns false

var fcns = obj.accessors;
// returns [ <Function>, <Function> ]
```

</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

-   The returned object has the following properties:

    -   **accessorProtocol**: `boolean` indicating whether the provided array-like object supports the get/set protocol (i.e., uses accessors for getting and setting elements).
    -   **accessors**: a two-element array whose first element is an accessor for retrieving an array element (i.e., a getter) and whose second element is an accessor for setting an array element (i.e., a setter).

-   The getter accessor accepts two arguments:

    -   **arr**: array-like object.
    -   **idx**: element index.

-   The setter accessor accepts three arguments:

    -   **arr**: array-like object.
    -   **idx**: element index.
    -   **value**: value to set.

-   The intent of this function is to provide a minimal abstraction over how elements are accessed when operating on indexed (i.e., array-like objects supporting element access via integer indices using bracket `[]` syntax) and accessor (i.e., array-like objects supporting the get/set protocol in which explicit `get` and `set` methods are used for element access) array-like objects.

</section>

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<!-- Package usage examples. -->

<section class="examples">

## Examples

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

```javascript
var Complex64Array = require( '@stdlib/array-complex64' );
var zeroTo = require( '@stdlib/array-base-zero-to' );
var accessors = require( '@stdlib/array-base-accessors' );

// Create an array:
var x = new Complex64Array( zeroTo( 10 ) );

// Get accessor functions for retrieving array elements:
var obj = accessors( x );
// returns {...}

// Check whether the array supports the accessor protocol:
var bool = obj.accessorProtocol;
// returns true

console.log( 'Accessor protocol: %s', bool );

// Retrieve an array element:
var v = obj.accessors[ 0 ]( x, 1 );
// returns <Complex64>

console.log( 'x[1] = %s', v.toString() );
```

</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].

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[npm-url]: https://npmjs.org/package/@stdlib/array-base-accessors

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[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/array-base-accessors/main.svg
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[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/array-base-accessors/main/LICENSE

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