code: function keysInObject(obj, keys) {
    for (var i in keys) {
      if (keys[i] in obj) return true;
    }
    return false;
  }
docs: Determines if any key in an array exists on an object.
  @param {object} obj - Object to check for keys.
  @param {array} keys - Keys to check.
  @returns {boolean} `true` if any key is found on the object, or `false` if not.