Dynamic object building in JS

gistfile1.txt

var superBlinders = [ ["Firestorm", 4000], ["Solar Death Ray", 6000], ["Supernova", 12000] ];
var lighthouseRock = {
  gateClosed: true,
  weaponBulbs: superBlinders,
  capacity: 30,
  secretPassageTo: "Underwater Outpost",
  numRangers: 0
};

function addRanger(location, name, skillz, station) {
  location["numRangers"]++;
  location["ranger" + location["numRangers"]] = { name: name, skillz: skillz, station: station };
}

addRanger(lighthouseRock, "Nick Walsh", "magnification burn", 2);
addRanger(lighthouseRock, "Drew Barontini", "uppercut launch", 3);
addRanger(lighthouseRock, "Christine Wong", "bomb defusing", 1);

lighthouseRock.numRangers #=> 3
lighthouseRock.ranger1.name #=> "Nick Walsh"

// And so on and so forth...