I don't have time to look at it today, but people interested in the
best of both worlds should check out how Character and String works.
There's only one instance of Character representing the letter 'a' in
the whole system, but there are many letter 'a's. String stores bytes
for each character for compactness, but gives you back a Character
object when you call at:. It is worth looking at how. The pattern is
referenced in Object Design Patterns as 'Flyweight'.
-Todd Blanchard
On Aug 25, 2008, at 4:21 AM, Marcin Tustin wrote:
For anyone who's interested, here's an implementation with the cards
represented as integers (or wrapping integers). Perhaps this could
be the basis of a super-compact representation. In any case, sorting
hands becomes simpler, but either dealing (creating a card object)
or checking that a play is legal becomes more involved (because at
some point you would have to reconstruct the symbolic information
regarding suit and rank).
Alternatively, if you want to make the deck bridge-specific you
could change the undealt variable into an Array or
OrderedCollection, and after shuffling treat each of the quarters as
belonging to a specific hand. Again, more compact, less simplicity.
Taking something out of the hand could be represented by replacing
that card's integer with 0 in the deck/hand array.
Another alternative would be to use an "ordinary" representation for
shuffling etc. then write that into a bit-packed representation with
each two bits representing a player, as the original questioner
wanted. Some utility classes could go over that to make handling
such a thing look like an array of players, and use a formatting
method similar to the one used in the attached code.
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