curry car part stamper

gistfile1.js

var partStamper = function(id) {
  return function(part) {
    part.stamp(id);
  }
};

var stamper1 = partStamper('car1');
car1.parts.forEach(stamper1);

var stamper2 = partStamper('car2');
car2.parts.forEach(stamper2);