Customer Hungarian Notation

Customer.js

var Customer = function (config) {
  this.sFirstName = config.firstName || '';
  this.sLastName = config.lastName || '';
  this.aAddressLines = (config.addressLines || []).concat();
  this.aEmployees = (config.employees || []).concat();
  this.sFullName = this._getFullName();
};

Customer.prototype._getFullName = function () {
  return this.sFirstName + this.sLastName;
};