Ok after a cup of tea I'm starting to realize i can easily do something
like:
(let [moved (update-position p coords)] ;no mutation - returns a new piece
(filter (complement dead?)
(-> board
(dissoc (getListPosition p)) ;get rid of
the old piece
(assoc (getListPosition moved) moved)))) ;shove in the new one
and this will take care of dead-pieces concisely as well...
Jim
On 13/06/12 17:55, Jim - FooBar(); wrote:
On 13/06/12 17:22, [email protected] wrote:
For example, if your state were a vector [:x :o :x nil .... :x]
(for a board of tic-tac-toe), calling (assoc board 3 :x) will return a
new board
with the position 3 set to :x.
Yes but in tic-tac-toe you are inserting pieces while in
chess/checkers you move pieces...that is, pieces disappear from their
original position and move to the next. Using your recommendation I
would have to do at least 1 dissoc and 1 assoc for a single move won't
I? on the other hand, with your approach it means I don't have to
build a new board after each move - it happens automatically...
by the way, and I'm not trying to argue here...trying to make
constructive conversation! I don't have a lot of people I can talk
with about these things...thanks :-)
Jim
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