I wrote daff to
better visualize diffs between tables (daff = data diff).
You don’t need this if you work with
append-only data, for example a stream of events
churned out by a sensor or bureaucracy. But if you
have a collection of assertions that can change with time
or need correcting, then data diffs are handy.
daff can be used from that command line,
as a library,
or on github, using James Smith’s CSVHub. CSVHub can convert a
diff like this:
to something like this:
