javascript - 无法读取未定义的属性 'score'

Question

无法读取未定义的属性“分数”这是一个使用极小极大算法的井字游戏。这是我整个应用程序的笔。

https://codepen.io/MartinaMF/pen/LjNdNN

    $(document).ready(function(){
    var turns=[0,1,2,3,4,5,6,7,8];
    var computerTurn;
    var playerTurn;
    var iter=0;
    var count=0;

  function winCondition(turnArray,currentTurn){
    if((turnArray[0]===currentTurn && turnArray[1]===currentTurn && turnArray[2]===currentTurn)||
       (turnArray[3]===currentTurn && turnArray[4]===currentTurn && turnArray[5]===currentTurn)||
       (turnArray[6]===currentTurn && turnArray[7]===currentTurn && turnArray[8]===currentTurn)||
       (turnArray[0]===currentTurn && turnArray[3]===currentTurn && turnArray[6]===currentTurn)||
       (turnArray[1]===currentTurn && turnArray[4]===currentTurn && turnArray[7]===currentTurn)||
       (turnArray[2]===currentTurn && turnArray[5]===currentTurn && turnArray[8]===currentTurn)||
       (turnArray[0]===currentTurn && turnArray[4]===currentTurn && turnArray[8]===currentTurn)||
        (turnArray[2]===currentTurn && turnArray[4]===currentTurn && turnArray[6]===currentTurn)){
      return true;
    }
    else{
      return false;} 

  }
  function availableSpots(Arr){
    return Arr.filter(function(item){
      return item!="X" && item!="O";
    });
  }
   function minimax(reboard,player){
     iter++;
     let array = availableSpots(reboard);
     if (winCondition(reboard, playerTurn))
     {
     return {score:-10};

    }
    else if (winCondition(reboard, computerTurn))
    {
    return 
    {score:10};

      }
  else if (array.length === 0)
  {
    return {score:0};

  }
     var moves = [];
     for(var i=0; i<array.length;i++){
       var move = {};
       move.index =  reboard[array[i]];
       reboard[array[i]] = player;
       if(player==computerTurn){
         var g = minimax(reboard, playerTurn);
       move.score = g.score;
       }
       else{
         var g = minimax(reboard, computerTurn);
        move.score = g.score;
       }
       reboard[array[i]] = move.index;
       moves.push(move); 
     }
    var bestMove;
     if(player === computerTurn){
       var bestScore = -10000;
       for(var i=0; i<moves.length;i++){
       if(moves[i].score > bestScore){
         bestScore = moves[i].score;
         bestMove = i;
       }
     }
     }
     else{
       var bestScore = 10000;
       for(var i=0; i<moves.length;i++){
         if(moves[i].score < bestScore){
           bestScore = moves[i].score;
           bestMove = i;
         }
       }
     }
     return moves[bestMove];
}

  function reset(){
    turns = [0,1,2,3,4,5,6,7,8];
    count = 0;
    $(".box").text("");
  }
  function movement(turn,id){
    var spotTaken = $("#"+id).text();
    if(spotTaken!="X" ||spotTaken!="O" ){
      count++;
     $("#"+id).text(turn);
      turns[id]=turn;
      if(winCondition(turns,turn)){
        alert("you win!!");
        reset();
      }else if(count>8){
        alert("it was a draw");
        reset();
      }
      else{
        count++;
        var computerChoice = minimax(turns,computerTurn).index;
        console.log(computerChoice);
       $("#"+computerChoice).text(computerTurn);
        turns[computerChoice]=computerTurn;
        if(winCondition(turns,computerTurn)){
          alert("you lose!!");
          reset();
        }
        else if(count > 8){
          alert("it was a draw");
        }
      }

  }
  }
  $("#onePlayer").on("click",function(){
    $("#xOro").show();
    $("#chooseGame").hide();
  });
  $("#chooseX").on("click",function(){
    $("#xOro").hide();
    $("#gameBoard").show();
    computerTurn = "O";
    playerTurn = "X";
    $(".playerOneTurn").show();
    $(".playerOneTurn").html("<p>Computer's turn</p>");

  }); 
  $("#chooseO").on("click",function(){
    $("#xOro").hide();
    $("#gameBoard").show();
    computerTurn = "X";
    playerTurn = "O";
    $(".playerOneTurn").show();
    $(".playerOneTurn").html("<p>Computer's turn</p>");
  });
  $(".box").on("click",function(){
    var spot = $(this).attr("id");
    movement(playerTurn,spot);
  });
});

我在上面的笔中为 tic tac toe 游戏创建了一个笔，但是当我尝试玩它时，它给我这条消息“无法读取未定义的属性分数”我不知道为什么？谁能帮帮我？

Answer 1

你的 minimax() 返回 {score} 然后你这样做:

 var g = minimax(reboard, computerTurn).score;
 move.score = g.score;

'g' 的分数值不是对象，所以下面的行将失败

move.score = g.score;

你应该这样做:

var g = minimax(reboard, computerTurn).score;
 move.score = g;