sets

[Jonathan Impett]

Hello,
    I've clearly misconceived the working of sets - but could anyone
please tell me why this works:

    inventionlist = [List create: self];
    [inventionlist addLast: invention1];
    [inventionlist addLast: invention2];
    no = [inventionlist getCount];
    printf("inventionlist has %d objects\n", no);

    but this -adding the same objects to a set instead of a list -
doesn't (i.e. getCount returns zero):

    inventionset = [Set create: self];
    idptr1 = [inventionset add: invention1];
    idptr2 =  [inventionset add: invention2];
    no = [inventionset getCount];
    printf("inventionsethas %d objects\n", no);

        Thanks,
        Jonathan


Jonathan Impett
Faculty of Music
University of Cambridge
West Road
Cambridge CB3 9DP
UK

tel: (+44) (0)1954 250192
address@hidden








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