I have a json.rows file -> instances.json.rows with approximately 223k rows
I tried using jsonlite and came up with
instancesfile <- fromJSON(\"inst
out <- lapply(readLines("instances.json.rows"), fromJSON)
Congrats out is what you want it to be. The L apply applies the fromJSON function to each member returned from readLines and returns the results to out. I miss Spoke a bit in my comment, to make your file valid json you would have to replace the newlines with comma, then put the result where the * is in the below example. But that's all non-sense, just use the above one liner.
{"data":[*]}