How to check if object has any properties in JavaScript?
http://stackoverflow.com/questions/2673121/how-to-check-if-object-has-any-properties-in-javascript

function isEmptyObject(obj) {  for(var prop in obj) {    if (Object.prototype.hasOwnProperty.call(obj, prop)) {      return false;    }  }  return true;}isEmptyObject({}); // trueisEmptyObject({foo:'bar'});  // false