wdavidw/node-csv-parser — pull request #32 by eladb (2012-06-14 00:38:24+00:00)
Title: writeOptions.newColumns

If `writeOptions.columns` is not defined and `writeOptions.newColumns` is defined, any new keys
added to the object returned by `transform()` will be added as an output column.

See wdavidw/node-csv-parser#31