[r-t] Delta-based transposition representation

Don Morrison dfm at ringing.org
Fri Jun 10 02:10:54 UTC 2016

On Thu, Jun 9, 2016 at 7:22 PM, Alan Burlison <alan.burlison at gmail.com>
> I'm not sure why having a representation that looks identical for
> two different semantics is considered to be a bonus

It's certainly not necessary, but it is sometimes convenient. For example,
if you have any operations you want to be able to apply both to changes (in
the more general sense, such as permutation operations of lead end and
course ends and so on) and to rows (e.g. isInCourse()) you only have to
write them once, not twice.

Don Morrison <dfm at ringing.org>
"The faults of the burglar are the qualities of the financier: the
manners and habits of a duke would cost a city clerk his situation."
              -- George Bernard Shaw, _Major Barbara_
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