today's puzzle is:

    Dictionary new
        at: (Set with: 1) put: 'is';
        at: (Set new add: 1; yourself) ifAbsent: ['isnot']

why does this little snippet *sometimes* answer 'is' and *sometimes* answers
'isnot'?

i ask because i am trying to use Sets as keys in a Dictionary, but i am
getting the non-deterministic behaviour witnessed above.

help, commments, suggestions greatly appreciated.

dave

--
        j. david farber
    oo architect+mentor
numenor labs incorporated
in sunny boulder colorado
    dfarber at numenor.com
        www.numenor.com