Filename Extension

Regular expression to capture a POSIX filename extension.

Usage

var reExtnamePosix = require( '@stdlib/regexp/extname-posix' );

reExtnamePosix()

Returns a regular expression to capture a POSIX filename extension.

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

reExtnamePosix.REGEXP

Regular expression to capture a POSIX filename extension.

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

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

Examples

var reExtnamePosix = require( '@stdlib/regexp/extname-posix' );

var RE_EXTNAME_POSIX = reExtnamePosix();
var ext;

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

ext = RE_EXTNAME_POSIX.exec( '/foo/bar/home.html' )[ 1 ];
// returns '.html'

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

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

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

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

ext = RE_EXTNAME_POSIX.exec( '/foo/bar/.gitignore' )[ 1 ];
// returns ''