javascript hash merge

gistfile1.js

var a = {aaa: 1, bbb: 2, ccc: 3};
var b = {ddd: 4, eee: 5};

var Hash = function(hash){
  this.hash = hash;
};
Hash.prototype.merge = function(target) {
  for (var i in target) {
    if (typeof target[i] === 'function') { continue; }
    if (typeof target[i] === 'object') { continue; }
    this.hash[i] = target[i];
  }
  return this.hash;
};

console.log(new Hash(a).merge(b));

// or

Object.extend = function(destination, source) {
  for (var property in source) {
    if (source.hasOwnProperty(property)) {
      destination[property] = source[property];
    }
  }
  return destination;
};

console.log(Object.extend(a, b));