hexo/node_modules/cuid/lib/fingerprint.js

var pad = require('./pad.js');

var os = require('os'),
    padding = 2,
    pid = pad(process.pid.toString(36), padding),
    hostname = os.hostname(),
    length = hostname.length,
    hostId = pad(hostname
      .split('')
      .reduce(function (prev, char) {
        return +prev + char.charCodeAt(0);
      }, +length + 36)
      .toString(36),
    padding);

module.exports = function fingerprint () {
  return pid + hostId;
};