npm package: @stdlib/error-tools-msg2id
Description: Return a two-character error identifier corresponding to a provided error message.
Author: The Stdlib Authors
Latest version: 0.2.3

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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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# msg2id

[![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 two-character error identifier corresponding to a provided error message.

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<section class="intro">

</section>

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<section class="installation">

## Installation

```bash
npm install @stdlib/error-tools-msg2id
```

</section>

<section class="usage">

## Usage

```javascript
var msg2id = require( '@stdlib/error-tools-msg2id' );
```

#### msg2id( msg )

Returns a two-character error identifier corresponding to a provided error message.

```javascript
var v = msg2id( 'invalid value. `%s` must be a number. Value: `%s`.' );
// e.g., returns '6d'
```

If provided an unrecognized error message, the function returns `null`.

```javascript
var v = msg2id( 'beep boop baz' );
// 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">

</section>

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<section class="examples">

## Examples

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

```javascript
var msg2id = require( '@stdlib/error-tools-msg2id' );

var list;
var v;
var i;

list = [
    'invalid argument. First argument must be a number and not `NaN`. Value: `%s`.',
    'invalid argument. First argument must be a positive integer. Value: `%s`.'
];

for ( i = 0; i < list.length; i++ ) {
    v = list[ i ];
    console.log( 'msg: "%s". id: "%s".', v, msg2id( v ) );
}
```

</section>

<!-- /.examples -->

<!-- Section for describing a command-line interface. -->



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## See Also

-   <span class="package-name">[`@stdlib/error-tools-msg2id-cli`][@stdlib/error-tools-msg2id-cli]</span><span class="delimiter">: </span><span class="description">CLI package for use as a command-line utility.</span>


</section>

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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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[@stdlib/error-tools-msg2id-cli]: https://www.npmjs.com/package/@stdlib/error-tools-msg2id-cli

[npm-image]: http://img.shields.io/npm/v/@stdlib/error-tools-msg2id.svg
[npm-url]: https://npmjs.org/package/@stdlib/error-tools-msg2id

[test-image]: https://github.com/stdlib-js/error-tools-msg2id/actions/workflows/test.yml/badge.svg?branch=v0.2.3
[test-url]: https://github.com/stdlib-js/error-tools-msg2id/actions/workflows/test.yml?query=branch:v0.2.3

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/error-tools-msg2id/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/error-tools-msg2id?branch=main

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[stdlib]: https://github.com/stdlib-js/stdlib

[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors

[cli-section]: https://github.com/stdlib-js/error-tools-msg2id#cli
[cli-url]: https://github.com/stdlib-js/error-tools-msg2id/tree/cli
[@stdlib/error-tools-msg2id]: https://github.com/stdlib-js/error-tools-msg2id/tree/main

[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/error-tools-msg2id/tree/deno
[deno-readme]: https://github.com/stdlib-js/error-tools-msg2id/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/error-tools-msg2id/tree/umd
[umd-readme]: https://github.com/stdlib-js/error-tools-msg2id/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/error-tools-msg2id/tree/esm
[esm-readme]: https://github.com/stdlib-js/error-tools-msg2id/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/error-tools-msg2id/blob/main/branches.md

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/error-tools-msg2id/main/LICENSE

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