npm package: @stdlib/string-base-format-tokenize
Description: Tokenize a string into an array of string parts and format identifier objects.
Author: The Stdlib Authors
Latest version: 0.2.4

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# formatTokenize

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

> Tokenize a string into an array of string parts and format identifier objects.

<section class="intro">

</section>

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<section class="installation">

## Installation

```bash
npm install @stdlib/string-base-format-tokenize
```

</section>

<section class="usage">

## Usage

```javascript
var formatTokenize = require( '@stdlib/string-base-format-tokenize' );
```

#### formatTokenize( str )

Tokenizes a string into an array of string parts and format identifier objects.

```javascript
var str = 'Hello, %s! My name is %s.';
var out = formatTokenize( str );
// returns [ 'Hello, ', {...}, '! My name is ', {...}, '.' ]
```

The format identifier objects have the following properties:

| property  | description                                                           |
| --------- | --------------------------------------------------------------------- |
| specifier | format specifier (single alphabetical character, lower- or uppercase) |
| flags     | format flags (string with any of '0', ' ', '+', '-', '#')             |
| width     | minimum field width (integer or `'*'`)                                |
| precision | precision (integer or `'*'`)                                          |
| mapping   | positional mapping from format specifier to argument index            |

</section>

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<section class="examples">

## Examples

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

```javascript
var formatTokenize = require( '@stdlib/string-base-format-tokenize' );

var out = formatTokenize( 'Hello %s!' );
// returns [ 'Hello ', {...}, '!' ]

out = formatTokenize( 'Pi: ~%.2f' );
// returns [ 'Pi: ~', {...} ]

out = formatTokenize( 'Multiple flags: %#+s' );
// returns [ 'Multiple flags: ', {...} ]
```

</section>

<!-- /.examples -->

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<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/string-base/format-interpolate`][@stdlib/string/base/format-interpolate]</span><span class="delimiter">: </span><span class="description">generate string from a token array by interpolating values.</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].

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[umd]: https://github.com/umdjs/umd
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<!-- <related-links> -->

[@stdlib/string/base/format-interpolate]: https://www.npmjs.com/package/@stdlib/string-base-format-interpolate

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</section>

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