code: function shallowClone(obj) {
      let result = {};
      for (let p in obj) {
          if (obj.hasOwnProperty(p)) {
              result[p] = obj[p];
          }
      }
      return result;
  }
docs: clones the given object's properties shallowly, ignores properties from prototype
  @param obj the object to clone
  @return the cloned object