Object.setPrototypeOf

Object.setPrototypeOf(obj, prototype

var dict = Object.setPrototypeOf{}, null

// Only works in Chrome and FireFox, does not work in IE:
Object.setPrototypeOf = Object.setPrototypeOf || function(obj, proto) {
  obj.__proto__ = proto;
  return obj; 
}

/**
*** Object.appendChain(@object, @prototype)
*
* Appends the first non-native prototype of a chain to a new prototype.
* Returns @object (if it was a primitive value it will transformed into an 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")
*
* Appends the first non-native prototype of a chain to the native Function.prototype object, then appends a
* new Function(["@arg"(s)], "@function_body") to that chain.
* Returns the function.
*
**/

Object.appendChain = function(oChain, oProto) {
  if (arguments.length < 2) { 
    throw new TypeError('Object.appendChain - Not enough arguments'
  }
  if (typeof oProto !== 'object' && typeof oProto !== 'string') {
    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 = 'yes';
}

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

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

var oCat = new MammalSpecies('Felis'

console.log(oCat.isMammal // 'yes'

function Animal() {
  this.breathing = 'yes';
}

Object.appendChain(oCat, new Animal()

console.log(oCat.breathing // 'yes'

function MySymbol() {
  this.isSymbol = 'yes';
}

var nPrime = 17;

console.log(typeof nPrime // 'number'

var oPrime = Object.appendChain(nPrime, new MySymbol()

console.log(oPrime // '17'
console.log(oPrime.isSymbol // 'yes'
console.log(typeof oPrime // 'object'

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

var george = Object.appendChain(new Person('George'),
                                'console.log("Hello guys!!"'

console.log(george.identity // 'George'
george( // 'Hello guys!!'