It's a common misunderstanding that every discrete change to a model must
originate from a different message. In general messages are for expressing
what is allowed to happen in your application as a result of outside
behavior like user input and server responses, whereas you want to run your
AI as a direct, immediate result of your user making a move. What you
should do instead is write two functions, toggleAtIndex : Int -> Model ->
Model which handles the model changes under Toggle indexToToggle, and runAi
: Model -> Model, which handles the call to miniMax. Then in your single
Toggle message branch, call them both in the right order:
toggleAtIndex indexToToggle model =
{ model | board = move indexToToggle model.turn model.board }
runAi model =
fst (miniMax model 0)
update msg model =
case msg of
Toggle indexToToggle ->
( model
|> toggleAtIndex indexToToggle
|> runAi
, Cmd.none
)
On Monday, October 10, 2016 at 2:23:51 AM UTC-5, [email protected] wrote:
>
> I wrote an TicTacToe AI game. I published it here.
> https://tronyeu0802.github.io/TicTacToe-elm/
>
> Currently, when you make a move, the game will calculate an AI move then
> the browser will display both your move and the AI move at the same time. I
> did this by create and perform a task that always succeeds with the AIMove
> message.
>
> update msg model =
>
> case msg of
>
> Toggle indexToToggle ->
>
> ( { model
>
> | board = move indexToToggle model.turn model.board
>
> }
>
> , Task.perform (\_ -> Debug.crash "This failure cannot
> happen.") identity (Task.succeed AIMove)
>
> --Cmd.Extra.message AIMove
>
> )
>
>
> AIMove ->
>
> ( fst (miniMax model 0)
>
> , Cmd.none
>
> )
>
>
> How can I display the player's move, then the AI's move after that?
>
> I'm thinking that this could be done by subscribing to the number of
> available moves left. If this is even then do an AI move else do nothing.
>
> I'm very new to ELM , I hope you teach better ways to achieve this. :D
> Thank you
>
>
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