gistfile1.js

/* Clone With Inheritance
 *
 * Creates a new object that inherits from the given object so it will reflect any
 * future changes to the original object
 */
Object.cloneWithInheritance = function cloneWithInheritance(source){
  var sourceClass = function(){};
  sourceClass.prototype = source;
  return new sourceClass();
};

Hash.prototype.cloneWithInheritance = function cloneWithInheritance(){
  var hash = new Hash();
  hash._object = Object.cloneWithInheritance(this._object);
  return hash;
};

Object.extendWithInheritance = function extendWithInheritance(source, extension){
  return Object.extend(Object.cloneWithInheritance(source),extension);
};

Hash.prototype.mergeWithInheritance = function mergeWithInheritance(source){
  return this.cloneWithInheritance().update(source);
};