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# Filename

> [Regular expression][mdn-regexp] to split a Windows filename.

<section class="usage">

## Usage

```javascript
var reFilenameWindows = require( '@stdlib/regexp/filename-windows' );
```

#### reFilenameWindows()

Returns a [regular expression][mdn-regexp] to split a Windows filename.

<!-- eslint no-trailing-spaces: "off" -->

```javascript
var RE_FILENAME_WINDOWS = reFilenameWindows(); 
var parts = RE_FILENAME_WINDOWS.exec( 'C:\\foo\\bar\\index.js' ).slice();
/* returns
    [
        'C:\\foo\\bar\\index.js',  // input value
        'C:',                      // device
        '\\',                      // slash
        'foo\\bar\\',              // dirname
        'index.js',                // basename
        '.js'                      // extname
    ]
*/
```

#### reFilenameWindows.REGEXP

[Regular expression][mdn-regexp] to split a Windows filename.

```javascript
var parts = reFilenameWindows.REGEXP.exec( 'C:\\foo\\bar\\home.html' ).slice();
/* returns
    [
        'C:\\foo\\bar\\home.html',
        'C:'
        '\\',
        'foo\\bar\\',
        'home.html',
        '.html'
    ]
*/
```

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   When executed against dotfile filenames (e.g., `.gitignore`), the [regular expression][mdn-regexp] does **not** capture the basename as a filename extension.

    ```javascript
    var parts = reFilenameWindows.REGEXP.exec( '.bash_profile' ).slice();
    /* returns
      [
          '.bash_profile',
          '',
          '',
          '',
          '.bash_profile',
          ''
      ]
    */

    parts = reFilenameWindows.REGEXP.exec( '.travis.yml' ).slice();
    /* returns
      [
          '.travis.yml',
          '',
          '',
          '',
          '.travis.yml',
          '.yml'
      ]
    */
    ```

</section>

<!-- /.notes -->

<section class="examples">

## Examples

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

```javascript
var reFilenameWindows = require( '@stdlib/regexp/filename-windows' );

var RE_FILENAME_WINDOWS = reFilenameWindows();
var parts = RE_FILENAME_WINDOWS.exec( 'index.js' ).slice();
/* returns
    [
        'index.js',
        '',
        '',
        '',
        'index.js',
        '.js'
    ]
*/

parts = RE_FILENAME_WINDOWS.exec( 'C:\\foo\\bar\\home.html' ).slice();
/* returns
    [
        'C:\\foo\\bar\\home.html',
        'C:',
        '\\',
        'foo\\bar\\',
        'home.html',
        '.html'
    ]
*/

parts = RE_FILENAME_WINDOWS.exec( 'foo\\file.pdf' ).slice();
/* returns
    [
        'foo\\file.pdf',
        '',
        '',
        'foo\\',
        'file.pdf',
        '.pdf'
    ]
*/

parts = RE_FILENAME_WINDOWS.exec( 'beep\\boop.' ).slice();
/* returns
    [
        'beep\\boop.',
        '',
        '',
        'beep\\',
        'boop.',
        '.'
    ]
*/

parts = RE_FILENAME_WINDOWS.exec( '' ).slice();
/* returns
    [
        '',
        '',
        '',
        '',
        '',
        ''
    ]
*/

parts = RE_FILENAME_WINDOWS.exec( '\\foo\\bar\\file' ).slice();
/* returns
    [
        '\\foo\\bar\\file',
        '',
        '\\',
        'foo\\bar\\',
        'file',
        ''
    ]
*/

parts = RE_FILENAME_WINDOWS.exec( 'C:\\foo\\bar\\.gitignore' ).slice();
/* returns
    [
        'C:\\foo\\bar\\.gitignore',
        'C:',
        '\\',
        'foo\\bar\\',
        '.gitignore',
        ''
    ]
*/
```

</section>

<!-- /.examples -->

<section class="links">

[mdn-regexp]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions

</section>

<!-- /.links -->