Object.setPrototypeOf()

var dict = Object.setPrototypeOf({}, null);

if (!Object.setPrototypeOf) {
  Object.prototype.setPrototypeOf = function (obj, proto) {
    if (obj.__proto__) {
      obj.__proto__ = proto;
      return obj;
    } else {
      //       Object.create(null) 
      var Fn = function () {
        for (var key in obj) {
          //       
          Object.defineProperty(this, key, {
            value: obj[key],
          });
        }
      };
      Fn.prototype = proto;
      return new Fn();
    }
  };
}

/**
 *** Object.appendChain(@object, @prototype)
 *
 *        .
 *  @object (    ,     ).
 *
 *** Object.appendChain(@object [, "@arg_name_1", "@arg_name_2", "@arg_name_3", "..."], "@function_body")
 *** Object.appendChain(@object [, "@arg_name_1, @arg_name_2, @arg_name_3, ..."], "@function_body")
 *
 *          Function.prototype,  
 * new Function(["@arg"(s)], "@function_body")   .
 *  .
 *
 **/

Object.appendChain = function (oChain, oProto) {
  if (arguments.length < 2) {
    throw new TypeError("Object.appendChain - Not enough arguments");
  }
  if (typeof oProto === "number" || typeof oProto === "boolean") {
    throw new TypeError(
      "second argument to Object.appendChain must be an object or a string",
    );
  }

  var oNewProto = oProto,
    oReturn =
      (o2nd =
      oLast =
        oChain instanceof this ? oChain : new oChain.constructor(oChain));

  for (
    var o1st = this.getPrototypeOf(o2nd);
    o1st !== Object.prototype && o1st !== Function.prototype;
    o1st = this.getPrototypeOf(o2nd)
  ) {
    o2nd = o1st;
  }

  if (oProto.constructor === String) {
    oNewProto = Function.prototype;
    oReturn = Function.apply(null, Array.prototype.slice.call(arguments, 1));
    this.setPrototypeOf(oReturn, oLast);
  }

  this.setPrototypeOf(o2nd, oNewProto);
  return oReturn;
};

function Mammal() {
  this.isMammal = "";
}

function MammalSpecies(sMammalSpecies) {
  this.species = sMammalSpecies;
}

MammalSpecies.prototype = new Mammal();
MammalSpecies.prototype.constructor = MammalSpecies;

var oCat = new MammalSpecies("Felis");

alert(oCat.isMammal); // ''

function Animal() {
  this.breathing = "";
}

Object.appendChain(oCat, new Animal());

alert(oCat.breathing); // ''

function Symbol() {
  this.isSymbol = "";
}

var nPrime = 17;

alert(typeof nPrime); // 'number'

var oPrime = Object.appendChain(nPrime, new Symbol());

alert(oPrime); // '17'
alert(oPrime.isSymbol); // ''
alert(typeof oPrime); // 'object'

function Person(sName) {
  this.identity = sName;
}

var george = Object.appendChain(
  new Person(""),
  'alert(", !!");',
);

alert(george.identity); // ''
george(); // ', !!'