multiplication of lists of strings

[castironpi at gmail.com]

On Mar 5, 2:16 am, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> castiro... at gmail.com a écrit :
> (snip)
>
> > That reminds me:  Is there a generic 'relation' pattern/recipie, such
> > as finding a computer that's "paired" with multiple users, each of who
> > are "paired" with multiple computers, without maintaining dual-
> > associativity?
>
> Yes : use a relational database.

No performance hit.  Can I write an ad hoc relational class structure?