Nodejs Utililty Methods Object Clone

Object.prototype.clone = function() {
  var copy = this.constructor()
  for (var attr in this) {
    if (this.hasOwnProperty(attr)) copy[attr] = this[attr]
  return copy

Object.prototype.clone = function () {
  var obj = this.constructor === Array ? [] : {};
  for (var e in this) {
    obj[e] = typeof this[e] === 'object' ? this[e].clone() : this[e];
  return obj;

Object.prototype.clone = function() {
  var newObj = {};
  for (var i in this) {
    if (typeof(this[i]) == 'object' || typeof(this[i]) == 'function') {
      newObj[i] = this[i].clone();
    } else {
      newObj[i] = this[i];
  return newObj;
};

Object.prototype.clone = function () {
  var o = new Object(); 
  for (var property in this) {
    o[property] = typeof (this[property]) == 'object' ? this[property].clone() : this[property]
  return o

Object.clone = function(object) {
  var clone = {};
  Object.each(object, function(key, value) {
    clone[key] = value;
  });
  return clone;
};

Object.prototype.clone = function clone() {
  function F() {}
  F.prototype = this;
  return new F();

function copy(object) {
    if (
            !object || typeof (object) != 'object' ||
                    object instanceof Class
            ) {
        return object;
    else if (object instanceof Array) {
        var c = [];
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