Get Json key using JsonPath - json

Question

I am struggling to write a JsonPath query to extract particular keys from the following sample Json.
{
"initial": "somevalue",
"somekey2": {
"inner1": "innerval1",
"inner2": "innerval2"
}
}
For example:
1) I wish to extract the first key, which in this case is initial. Is this possible using JsonPath?
2) Get an inner key such as inner1. Something similar to $."initial"."somekey2" but returning an array with just the keys (inner1 and inner2).

Answer 1

This SO question covers it.
$.*~ returns
[
"initial",
"somekey2"
]
$.somekey2.*~ returns
[
"inner1",
"inner2"
]
To get all 2nd order children use $.*.*~. Basically for nth order, $.(n times *).*~

Answer 2

not sure about json path, but suppose your object is a
a={
"initial": "somevalue",
"somekey2": {
"inner1": "innerval1",
"inner2": "innerval2"
}
};
the you can get all keys by using Object.keys(a)
that will give array of keys ["initial", "somekey2"]
then you can use that key to revtrive its nested value
a[Object.keys(a)[1]] // returns {inner1: "innerval1", inner2: "innerval2"}
and you can repeat the same for all nested element