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Computer Move: Basicλ︎

Lets assume that the human player always goes first for now.

Once the human player has taken their turn, we will call a function for the computer to take their turn.

So we add a call to computer-move to the :on-click option of the cell-empty function.

(defn cell-empty
  "Generate a cell that has not yet been clicked on"
  [x-cell y-cell]
  ^{:key (str x-cell y-cell)}
  [:rect {:width 0.9
          :height 0.9
          :fill "grey"
          :x x-cell
          :y y-cell
          (fn rectangle-click [e]
            (println "Cell" x-cell y-cell "was clicked!")
             (swap! app-state assoc-in [:board y-cell x-cell] :nought))

Then add the computer-move function

(defn computer-move
  "Takes a turn for the computer, adding an X shape to the board"
  (swap! app-state assoc-in [:board 0 0] :cross))

Computer Move

Hint:: Thinking timeλ︎

We could add some artificial thinking time to the computer move using js/setTimeout. If you do set some thinking time, then you should also visualise that the computer is thinking, so the human player knows what is going on.

(js/setTimeout (fn []) timeout)

Computer thinking time - sample suggested code