4 Dec
2010
4 Dec
'10
12:31 p.m.
On 4 Dec 2010, at 06:25, wren ng thornton wrote:
Well the paradigmatic (programming) examples of functors are all container-like structures: sets, multisets, lists, trees,...
Really? Just as monads are not (only) containers, I think it is a mistake to think of functors as (only) containers too. There are many common paradigmatic examples of "active" functors as well: parsers, pretty-printers, database queries. Regards, Malcolm