On Wed, Dec 31, 2008 at 10:22 AM, John Machin <sjmachin at lexicon.net> wrote: (snip) > The "crawl through the shrubbery looking for evidence" approach > stumbles on the actual code: Yes I found his implementation soon after :) Not bad actually... I wonder why bag() isn't shipped with the std lib - perhaps in teh set module ? --JamesMills