flatten-object.js

/*
 * Flatten Object @gdibble: Inspired by https://gist.github.com/penguinboy/762197
 *   input:  { 'a':{ 'b':{ 'b2':2 }, 'c':{ 'c2':2, 'c3':3 } } }
 *   output: { 'a.b.b2':2, 'a.c.c2':2, 'a.c.c3':3 }
 */
var flattenObject = function(ob) {
  var toReturn = {};
  var flatObject;
  for (var i in ob) {
    if (!ob.hasOwnProperty(i)) {
      continue;
    }
    if ((typeof ob[i]) === 'object') {
      flatObject = flattenObject(ob[i]);
      for (var x in flatObject) {
        if (!flatObject.hasOwnProperty(x)) {
          continue;
        }
        toReturn[i + (!!isNaN(x) ? '.' + x : '')] = flatObject[x];
      }
    } else {
      toReturn[i] = ob[i];
    }
  }
  return toReturn;
};

Your flatten object, messes up existing values of an array if the object or any embedded object at any level has an array. HERE is an even better gist inspired from yours :)

Awesome, thanks for advacing the code @slidenerd 👍