Filename Extension

Regular expression to capture a Windows filename extension.

Usage

var reExtnameWindows = require( '@stdlib/regexp/extname-windows' );

reExtnameWindows()

Returns a regular expression to capture a Windows filename extension.

var RE_EXTNAME_WINDOWS = reExtnameWindows();
var ext = RE_EXTNAME_WINDOWS.exec( 'index.js' )[ 1 ];
// returns '.js'

reExtnameWindows.REGEXP

Regular expression to capture a Windows filename extension.

var ext = reExtnameWindows.REGEXP.exec( 'C:\\foo\\bar\\index.js' )[ 1 ];
// returns '.js'

Notes

When executed against dotfile filenames (e.g., .gitignore), the regular expression does not capture the basename as a filename extension.

var ext = reExtnameWindows.REGEXP.exec( '.bash_profile' )[ 1 ];
// returns ''

ext = reExtnameWindows.REGEXP.exec( '.travis.yml' )[ 1 ];
// returns '.yml'

Examples

var reExtnameWindows = require( '@stdlib/regexp/extname-windows' );

var RE_EXTNAME_WINDOWS = reExtnameWindows();
var ext;

ext = RE_EXTNAME_WINDOWS.exec( 'index.js' )[ 1 ];
// returns '.js'

ext = RE_EXTNAME_WINDOWS.exec( 'C:\\foo\\bar\\home.html' )[ 1 ];
// returns '.html'

ext = RE_EXTNAME_WINDOWS.exec( 'foo\\file.pdf' )[ 1 ];
// returns '.pdf'

ext = RE_EXTNAME_WINDOWS.exec( 'beep\\boop.' )[ 1 ];
// returns '.'

ext = RE_EXTNAME_WINDOWS.exec( '' )[ 1 ];
// returns ''

ext = RE_EXTNAME_WINDOWS.exec( '\\foo\\bar\\file' )[ 1 ];
// returns ''

ext = RE_EXTNAME_WINDOWS.exec( 'C:\\foo\\bar\\.gitignore' )[ 1 ];
// returns ''