npm package: @stdlib/ndarray-base-output-policy-str2enum
Description: Return the enumeration constant associated with an output ndarray data type policy string.
Author: The Stdlib Authors
Latest version: 0.2.3

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# str2enum

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> Return the enumeration constant associated with an output ndarray [data type policy][@stdlib/ndarray/output-dtype-policies] string.

<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->

<section class="intro">

</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/ndarray-base-output-policy-str2enum
```

</section>

<section class="usage">

## Usage

```javascript
var str2enum = require( '@stdlib/ndarray-base-output-policy-str2enum' );
```

#### str2enum( policy )

Returns the enumeration constant associated with an output ndarray [data type policy][@stdlib/ndarray/output-dtype-policies] string.

```javascript
var v = str2enum( 'same' );
// returns <number>
```

If unable to resolve an enumeration constant, the function returns `null`.

```javascript
var v = str2enum( 'beep' );
// returns null
```

</section>

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

<section class="notes">

## Notes

-   Downstream consumers of this function should **not** rely on specific integer values (e.g., `SAME == 0`). Instead, the function should be used in an opaque manner.

</section>

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<!-- Package usage examples. -->

<section class="examples">

## Examples

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

```javascript
var str2enum = require( '@stdlib/ndarray-base-output-policy-str2enum' );

var v = str2enum( 'same' );
// returns <number>

v = str2enum( 'promoted' );
// returns <number>

v = str2enum( 'floating_point' );
// returns <number>

v = str2enum( 'real_floating_point' );
// returns <number>

v = str2enum( 'signed_integer' );
// returns <number>

v = str2enum( 'unsigned_integer' );
// returns <number>

v = str2enum( 'complex_floating_point' );
// returns <number>

v = str2enum( 'integer' );
// returns <number>
```

</section>

<!-- /.examples -->

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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

[![Chat][chat-image]][chat-url]

---

## License

See [LICENSE][stdlib-license].


## Copyright

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

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[deno-url]: https://github.com/stdlib-js/ndarray-base-output-policy-str2enum/tree/deno
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[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/ndarray-base-output-policy-str2enum/main/LICENSE

[@stdlib/ndarray/output-dtype-policies]: https://www.npmjs.com/package/@stdlib/ndarray-output-dtype-policies

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