ocp0c.js

function announce(collection) {
  console.log(collection.description);
  
  collection.logItems();
}

var favoriteCities = {
  items: {
    "Denmark": "Copenhagen",
    "Uganda": "Kampala",
    "Uraguay": "Montevideo"
  },
  
  description: "My favorite cities around the world:",
  
  logItems: function() {
    Object.keys(this.items).forEach(function(key) {
      console.log(this.items[key]);
    }, this);
  },
};

announce(favoriteCities);
  // Logs: 
  //   "My favorite cities around the world:"
  //   "Copenhagen"
  //   "Kampala"
  //   "Montevideo"