Can't create json for $.1 ($.integer)

[Shalitha Wijethilaka]

code:
$jsonObject = new JsonObject();
$jsonObject->set('$.1','asdf');
dd($jsonObject->getJson());

---

error : InvalidJsonPathExceptionError in JSONPath near '.1'

[Alessio Linares]

Hi!
The following should work:
$jsonObject->set('$[1]','asdf');
or
$jsonObject->set('$["1"]','asdf');