iteration6.js

var products = { 
  "widget": 400,
  "gear": 80,
  "crank": 375,
  "lever": 870,
};

var otherProducts = Object.create(products);
otherProducts["wheel"] = 210;

var otherProductKeys = Object.keys(otherProducts);
console.log("otherProductKeys: ", otherProductKeys);
  // logs otherProductKeys:  [ "wheel" ]

for (var i = 0; i < otherProductKeys.length; i += 1) {
  var key = otherProductKeys[i];
  console.log(key + " : " + otherProducts[key]);
}
  // logs "wheel: 210"