Recursive Object traversal (loops through Object keys and Arrays)

gistfile1.txt

var updateKeys = function (form) {

    var objString = Object.prototype.toString;

    var traverse = function (obj) {
      if (objString.call(obj) === '[object Array]') {
        for (var i = 0; i < obj.length; i++) {
          console.log(obj[i].type, obj[i].title);
          traverse(obj[i]);
        }
      } else {
        for (var key in obj) {
          if (objString.call(obj[key]) === '[object Array]') {
            traverse(obj[key]);
          }
        }
      }
    };

    traverse(form);

  };