boennemannnerf-dart
Maps a URL to an identifier.
var toNerfDart = require('nerf-dart')
toNerfDart('http://registry.npmjs.org')
// //registry.npmjs.org/
Originally from npm. Taken from https://github.com/npm/npm/blob/master/lib/config/nerf-dart.js and made available as a standalone package for easier reuse.