dfr to-jsonl for dataframe> dfr to-jsonl {flags} (file)
file: file path to save dataframe| input | output | 
|---|---|
| any | any | 
Saves dataframe to JSON lines file
> [[ab]; [12] [34]] |dfr into-df|dfr to-jsonltest.jsonl
Tips: Dataframe commands were not shipped in the official binaries by default, you have to build it with --features=dataframe flag
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    https://www.nushell.sh/commands/docs/dfr_to-jsonl.html