reExtname

Regular expression to capture a filename extension.

Installation

npm install @stdlib/regexp-extname

Usage

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

reExtname( [platform] )

Returns a regular expression to capture a filename extension.

var RE = reExtname();
// returns <RegExp>

RE = reExtname( 'posix' );
// returns <RegExp>

var ext = RE.exec( '/foo/bar/index.js' )[ 1 ];
// returns '.js'

RE = reExtname( 'win32' );
// returns <RegExp>

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

reExtname.REGEXP

Regular expression to capture a filename extension.

var bool = ( reExtname.REGEXP.toString() === reExtname().toString() );
// returns true

reExtname.REGEXP_POSIX

Regular expression to capture a POSIX filename extension.

var ext = reExtname.REGEXP_POSIX.exec( '/foo/bar/index.js' )[ 1 ];
// returns '.js'

reExtname.REGEXP_WIN32

Regular expression to capture a Windows filename extension.

var ext = reExtname.REGEXP_WIN32.exec( 'C:\\foo\\bar\\index.js' )[ 1 ];
// returns '.js'

Notes

• The as REGEXP exported regular expression is platform-dependent. If the current process is running on Windows, REGEXP === REGEXP_WIN32; otherwise, REGEXP === REGEXP_POSIX.

Examples

var reExtname = require( '@stdlib/regexp-extname' );
var RE_EXTNAME = reExtname();
var ext;

// Assuming a POSIX platform...
ext = RE_EXTNAME.exec( '/foo/bar/index.js' )[ 1 ];
// returns '.js'

ext = reExtname.REGEXP_WIN32.exec( '/foo/bar/home.html' )[ 1 ];
// returns '.html'

ext = reExtname.REGEXP_WIN32.exec( 'C:\\foo\\bar\\home.html' )[ 1 ];
// returns '.html'

See Also

• @stdlib/regexp-extname-posix: return a regular expression to capture a POSIX filename extension.
• @stdlib/regexp-extname-windows: return a regular expression to capture a Windows filename extension.
• @stdlib/utils-extname: return a filename extension.

Notice

This package is part of 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, see the main project repository.

Community

License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.