Just a simple, mini short code generator.

short_code_generator.js

// For Nodejs

const crypto = require('crypto');

/**
 * Get Short Code
 *
 * Mini Short Code Generator
 *
 * @param {Number} size
 *
 * @helper public
 * @return String
 */

exports.get_short_code = function(size){
  var random  = Math.floor(Math.random()*999999) + '';
  var md5crypto = crypto.createHash('md5').update(random).digest("hex");
  var short_code = md5crypto.substring(0, size);
  return short_code; // Ha! BOOM
}