Given a JSON key value structure, like "key1": 1, "key2": 2, the
gather_keys() function duplicates the rows of the tbl_json data.frame for
every key, adds a new column (default name "key") to capture the key names,
and then dives into the JSON values to enable further manipulation with
downstream tidyjson functions.
Usage
gather_keys(x, column.name = "key")
Arguments
x
a tbl_json whose JSON attribute should always be an object
column.name
the name to give to the column of key names created
Value
a tbl_json with a new column (column.name) that captures the keys
and JSON attribute of the associated value data
Details
This allows you to *enter into* the keys of the objects just like `gather_array`
let you enter elements of the array.