javascript - 使用 for 循环语句的结果作为 else if 语句中的条件

Question

我的第三个else if语句条件应该是for循环的结果。如何使用条件循环？

        //If player clicks centre on first move go in corner square
        if (current[4] === playerToken && this.state.stepNumber === 1) {
          let move = cornerSquares[Math.floor(Math.random() * cornerSquares.length)];
          drawSquare(move);
        } 
        //If player clicks corner square on first move go in centre square
        else if (this.state.stepNumber === 1) {
          for (let i = 0; i < cornerSquares.length; i++){
            if (current[cornerSquares[i]] === playerToken) {
              drawSquare(4);
            }
          }
        }
        //If player or computer has 2 in a row, place in 3rd square to win or block
        else if (/*CONDITION OF THE BELOW FOR LOOP*/) {
          for (let i = 0; i < twoInRow.length; i++) {
            const [a, b, c] = twoInRow[i];  
            if (current[a] && current[a] === current[b]) {
              drawSquare(c);
            }
          }
        }
        //Place in random empty square
        else {
         //code to randomly place x/o in random square
        }
      }

Answer 1

您可以使用 move 变量来指示您在何处找到了移动或尚未找到移动，并在下一个 if 中使用该变量(没有 else):

let move = null;
//If player clicks centre on first move go in corner square
if (current[4] === playerToken && this.state.stepNumber === 1) {
    let move = cornerSquares[Math.floor(Math.random() * cornerSquares.length)];
} 
//If player clicks corner square on first move go in centre square
else if (this.state.stepNumber === 1) {
    for (let i = 0; i < cornerSquares.length; i++){
        if (current[cornerSquares[i]] === playerToken) {
            move = 4;
            break; // Don't lose time on looping further
        }
    }
}
//If player or computer has 2 in a row, place in 3rd square to win or block
if (move === null) {
    for (let i = 0; i < twoInRow.length; i++) {
        const [a, b, c] = twoInRow[i];  
        if (current[a] && current[a] === current[b]) {
            move = c;
            break; // Don't lose time on looping further
        }
    }
}
//Place in random empty square
if (move === null {
    //code to randomly place x/o in random square
    move = // your logic here
}
// Perform move
drawSquare(move);