subclassing sets

[Jonathan Impett]

Hello,
    I was looking at an exchange from a couple of years ago suggesting
that subclassing sets (and collections in general) was not a wise
strategy. Is that still the case, can anyone tell me?
    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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