JS class pattern [2]

klass2.js

// AMD module definition:
define(function (require) {

  // An instantiable class:
  var K = function () {
    this._initialize();
    this._p = {};
  };
  
  
  // A "private" method:
  K.prototype._initialize = function () {
  }


  // A public method:
  K.prototype.update = function () {
  }


  // A constant
  K.MEANING_OF_LIFE = 42;
  
  return K;

});

Also, you want to read this for getting AMD requires working in a CommonJS way reliably: http://requirejs.org/docs/whyamd.html#sugar

Oh, I had a confusing typo from my console experiments — see https://gist.github.com/joseph/9766958/revisions. The 'foo' did not belong, it was for testing only.