[.tbl_json: Extract subsets of a tbl_json object (not replace)
Description
Extends `[.data.frame` to work with tbl_json objects, so that row filtering
of the underlying data.frame also filters the associated JSON.Usage
# S3 method for tbl_json
[(x, i, j, drop = if (missing(i)) TRUE else length(cols) ==
1)
Arguments
j
column elements to extract
drop
whether or not to simplify results