reExtnamePosix

Regular expression to capture a POSIX filename extension.

Installation

npm install @stdlib/regexp-extname-posix

Alternatively,

To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
If you are using Deno, visit the deno branch (see README for usage intructions).
For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).

The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.

To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.

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 ''

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.