Filename Extension

Return a filename extension.

Usage

var extname = require( '@stdlib/utils/extname' );

extname( filename )

Returns a filename extension.

var ext = extname( 'index.js' );
// returns '.js'

Examples

var fs = require( 'fs' );
var path = require( 'path' );
var extname = require( '@stdlib/utils/extname' );

var files;
var fpath;
var base;
var stat;
var ext;
var i;

base = path.resolve( __dirname, '..' );
files = fs.readdirSync( base );

for ( i = 0; i < files.length; i++ ) {
    fpath = path.join( base, files[ i ] );
    stat = fs.statSync( fpath );
    if ( !stat.isDirectory() ) {
        ext = extname( fpath );
        console.log( '%s --> %s', fpath, ext || '(no ext)' );
    }
}