get_in.js

/* Get a value from a nested object using just a string for readability
 *
 * Example:
 * var o = {first: {second: {third: {a: 1, b: 2}}}};
 * o.get_in('first.second.third.b'); // => 2
 */
Object.prototype.get_in = function(selector) {
  return selector.split('.').reduce(
    function(obj, key) {
      return obj[key];
    },
    this
  );
};