On Jan 3, 10:14 am, "Mark Volkmann" <r.mark.volkm...@gmail.com> wrote:
> What do you think of this way of resolving the issue? Note the use of the
> local variable "message". That can get set to either "You win!" or "You
> killed the snake!" inside dosync. Then outside dosync I check that and call
> new-game only if it's set.
That is correct with respect to transactions. I guess I would
structure the code differently: I would treat each move as a function
M: state -> (state, {win, loss, continue}) and check the second return
value for win or loss each time. M can be a pure function, except for
the IO and for telling, say, a display agent about the new state of
the world. But your way works too. I'm not sure which is better.
mfh
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