Timothy S. Nelson wrote:
On Sat, 4 Apr 2009, Xiao Yafeng wrote:
I mean whether I can see Set as a table and Bag as a table with a
unique constraint? like:
I think you have that backwards. A Set is conceptually like a Bag with a
uniqueness constraint, not the other way around.
subset test of Bag(test_name Str, test_ID Int, primary
key(test_ID))
I don't think you can really do something like that. Perl 6 as
specified leaves many things up to libraries. Implementing a Table type
will no doubt be one of those things. I would like to have a Table type
that will work well with the Tree/Plex type that I am working on.
In the meantime, a table would need to be represented as an array of
hashes, or a hash of arrays.
Speaking of libraries, I already implemented a table type ... it's called
Set::Relation/::V2 and its on CPAN right now ... for Perl 5 ... I still have to
port it to Perl 6, unless someone else wants to do that, but I designed it so
that would be easy to do. The port could stand for some additional Perl 6
savvyness too.
-- Darren Duncan
