質問編集履歴
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コードの追加
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File without changes
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@@ -23,4 +23,243 @@
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a = b + c;
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}
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```
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---
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追記
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単純化させたコードを載せて逆に混乱させてしまった様なので、少々長いですが、コード全文載せます。
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32
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onイベントの中のplacePieceというメソッドはboardという変数に新たな値を代入するメソッドなので、`console.log(board)`(*1)では変更前のboardを表示して、`console.log(board)`(*2)では変更後の値が表示されることを期待していたのですが、どちらも変更後（つまりplacePieceメソッドが動作した後）の値を表示しています。
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33
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34
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placePiece自体が期待した動作をしていないので、読み込みの順番がおかしいのは何となく分かっているのですが、どこが間違っているのか分からないので質問させていただきました。
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35
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36
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`board`という変数に新たな値を代入する直前で`console.log`しても新しい値の代入後の`board`が表示されるので、混乱しています。
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```javascript
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40
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<!DOCTYPE html>
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41
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<html lang="en" dir="ltr">
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<head>
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43
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<meta charset="utf-8">
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<title></title>
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<style>
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46
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#reversiTable {
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border: 2px solid black;
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background: #2A2;
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}
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50
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#reversiTable td {
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border: 2px solid black;
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width: 100px;
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height: 100px;
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}
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55
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.blackPiece{
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width: 70px;
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height: 70px;
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background: black;
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border-radius: 50%;
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margin: auto;
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}
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.whitePiece{
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width: 70px;
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64
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height: 70px;
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background: white;
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border-radius: 50%;
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margin: auto;
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}
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</style>
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</head>
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<body>
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<div>
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<table id="reversiTable">
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</table>
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</div>
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<div id="id">
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</div>
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<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
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<script type="text/javascript">
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(function(){
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// set borad
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let table = document.getElementById("reversiTable");
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for (let i = 0; i < 8; i++) {
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let tr = document.createElement('tr');
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table.appendChild(tr);
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}
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let trElem = table.children;
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for (let i = 0; i < 8; i++) {
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for (var j = 0; j < 8; j++) {
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let td = document.createElement('td');
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trElem[i].appendChild(td)
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}
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}
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tds = $('td');
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for (var i = 0; i < tds.length; i++) {
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tds.eq(i).attr('value', i);
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tds.eq(i).attr('class', 'tdElements');
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tds.eq(i).attr('id', 'tdId-' + i);
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tds.eq(i).append("<div></div>")
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}
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// initialize reversi pieces
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let serializedBoard = [];
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let board = [];
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let activePlayer = 1;
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for (var i = 0; i < 64; i++) {
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serializedBoard.push(0);
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}
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serializedBoard[27] = 2;
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serializedBoard[28] = 1;
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serializedBoard[35] = 1;
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serializedBoard[36] = 2;
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for (var i = 0; i < 8; i++) {
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let array = [];
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for (var j = 0; j < 8; j++) {
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array.push(serializedBoard[8*i + j]);
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}
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board.push(array);
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}
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for (var i = 0; i < serializedBoard.length; i++) {
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if (serializedBoard[i] === 1){
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$("#tdId-"+i+" > div").addClass('whitePiece');
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} else if (serializedBoard[i] === 2){
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$("#tdId-"+i+" > div").addClass('blackPiece');
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}
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}
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for (var i = 0; i < serializedBoard.length; i++) {
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const x = i % 8;
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const y = Math.floor(i / 8);
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board[y][x] = serializedBoard[i]
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}
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//
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// functions of reversi
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//
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$('td').on('click', function(){
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console.log(board); // *1
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// クリック箇所の取得
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const posX = $(this).index();
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const posY = $(this).parent().index();
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// 石をひっくり返すメソッド
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placePiece(posX, posY, activePlayer);
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// 盤面の状態を2次元配列から1次元配列にするメソッド
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serializeTheBoard();
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// 盤面の状態を表す配列から石が置いてある場所にCSSを適用するメソッド
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setColorOfPieces();
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console.log(board); // *2
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});
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function placePiece(_posX, _posY, _activePlayer){
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let opponent = getOpponent(_activePlayer);
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if (board[_posY][_posX] === 0){
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turnOverPiece(_posY, _posX, opponent);
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switchActivePlayer(_posY, _posX, _activePlayer);
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}else{
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return;
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}
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}
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function getOpponent(_activePlayer) {
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if (_activePlayer === 1){
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return 2;
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}else{
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return 1;
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}
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}
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function switchActivePlayer(_posX, _posY, _activePlayer){
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if (board[_posY][_posX] === activePlayer){
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if (activePlayer === 1) {
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activePlayer = 2;
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}else{
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activePlayer = 1;
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}
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}
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}
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function turnOverPiece(posY, posX, opponent){
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for (var i = -1; i <= 1; i++) {
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for (var j = -1; j <= 1; j++) {
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if (board[posY+j][posX+i] == opponent){
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flipPieces(posY, posX, j, i, opponent);
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}
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}
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}
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}
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function flipPieces(posY, posX, j, i, opponent){
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let counter = 1;
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let initDiffX = i;
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let initDiffY = j;
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do {
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counter++;
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diffX = initDiffX * counter;
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diffY = initDiffY * counter;
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if (board[posY + diffY][posX + diffX] === 0){
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break;
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}else if (board[posY + diffY][posX + diffX] === activePlayer){
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for (var a = 1; a < counter; a++){
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board[posY + (a * j)][posX + (a * i)] = activePlayer;
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}
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board[posY][posX] = activePlayer;
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}
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} while (board[posY + diffY][posX + diffX] == opponent);
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}
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function serializeTheBoard(){
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for (var i = 0; i < serializedBoard.length; i++) {
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const x = i % 8;
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const y = Math.floor(i / 8);
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serializedBoard[i] = board[y][x];
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}
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}
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function setColorOfPieces(){
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for (var i = 0; i < serializedBoard.length; i++) {
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if (serializedBoard[i] === 1){
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$("#tdId-"+i+" > div").addClass('whitePiece');
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} else if (serializedBoard[i] === 2){
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$("#tdId-"+i+" > div").addClass('blackPiece');
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}
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}
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}
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})();
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</script>
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</body>
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</html>
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```
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