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Uncaught TypeError: Cannot read property '1' of undefined（尽管已定义）

javascripthtmlarrayspropertiesundefined
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我们的老师给了我们“生命游戏”项目。我为我的项目感到自豪，直到我运行它并收到错误消息“未捕获的类型错误:无法读取未定义属性 '1'”。对于那些不知道什么是生命游戏的人，这是一个“游戏”，其中有一个矩阵（这里是8x8的矩阵）和一些规则来定义每个“人”（矩阵中的数字）是否能够存活。1表示活着，0表示死亡。 我会附上整个项目作为参考，但这里是出现错误的部分：

function process(matrix) { //creates the next generation

var neighbors = 0,
    position = '',
    nextgen = new Array(8); //the matrix has 8 rows
    for (i = 1; i <= 8; i++) {
        nextgen[i] = new Array(8);
        for (j = 1; j <= 8; j++) {
            neighbors = neighbors(matrix, i, j);

            //Game Rules
                if (neighbors < 2) {nextgen[i][j] = 0;
                } else if (neighbors == 2) {nextgen[i][j] = 1;
                } else if (neighbors <= 3) {nextgen[i][j] = nextgen[i][j];
                } else {nextgen[i][j] = 0;}
        }
    }
    return nextgen;
}

错误出现在if (neighbors < 2) {nextgen[i][j] = 0;}。有人有什么想法吗？我在定义8个nextgen[1]数组时，也定义了nextgen[1][1]，对吧？
这是整个项目。请注意，名称和其他内容均为德语。 

function berechne_nachbarn(matrixb, x, y) { //berechnet die Anzahl der Nachbarn fuer eine Zelle

var zelle = 0,
  nachbarn = 0,
  oben = 0,
  unten = 0,
  links = 0,
  rechts = 0;

//loesung fuer die Randzellen
 if (x == 1) {oben = 1} else {oben = x - 1}
 if (y == 1) {links = 1} else {links = y - 1}
 if (x == 8) {unten = 8} else {unten = x + 1}
 if (y == 8) {rechts = 8} else {rechts = y - 1}
 
for (i = oben; i <= unten; i++) {
 for (j = links; j <= rechts; j++) {
  zelle = parseInt (matrixb[i][j]);
  //loesung fuer leere Zellen
  if (isNaN(zelle)) {zelle = 0;}
  nachbarn = nachbarn + zelle;
 }//ende for j
}//ende for i
//die Zelle selbst ist nicht sein eigener Nachbar!
 nachbarn = nachbarn - matrixb[x][y];
 return nachbarn;
}//ende berechne_nachbarn;

function eingabe() {//erstellt Matrix

var spalte = 0,
  zeile = 0,
  ort = ''
  zelle = 0;
 brett = new Array(8); //8 Zeilen
 for (i = 1; i <= 8; i++) {
  brett[i] = new Array(8); //8 Spalten
  for (j = 1; j <= 8; j++) {
   ort = i + 'xx' + j;
    zelle = parseInt(document.formular.elements[ort].value);
    if (isNaN(zelle)) {zelle = 0;}
   brett[i][j] = zelle;
  }//ende for j
 }//ende for i
 return brett;
}//ende eingabe

function verarbeitung(matrix) {//Spielregeln und Verarbeitung

var nachbarn = 0,
  ort = '',
 nextgen = new Array(8); //neue Matrix fuer neue Generation
 for (i = 1; i <= 8; i++) {
  nextgen[i] = new Array(8);
  for (j = 1; j <= 8; j++) {
   nachbarn = berechne_nachbarn(matrix, i, j);
   
   //Spielregeln
    if (nachbarn < 2) {nextgen[i][j] = 0;
    } else if (nachbarn == 2) {nextgen[i][j] = 1;
    } else if (nachbarn <= 3) {nextgen[i][j] = nextgen[i][j];
    } else {nextgen[i][j] = 0;}
  }//ende for j
 }//ende for i
 return nextgen;
}//ende verarbeitung

function ausgabe(matrix) {//aendert die Werte im Formular

var ort = '';
 for (i = 1; i <= 8; i++) {
  for (j = 1; j <= 8; j++) {
   ort = i + 'xx' + j;
   document.formular.elements[ort].value = matrix[i][j];
  }//ende for j
 }//ende for i
}//ende ausgabe
<body>

<h1> Game Of Life</h1>

<form name = "formular">
 <input name = "1xx1" size = "1">
 <input name = "1xx2" size = "1">
 <input name = "1xx3" size = "1">
 <input name = "1xx4" size = "1">
 <input name = "1xx5" size = "1">
 <input name = "1xx6" size = "1">
 <input name = "1xx7" size = "1">
 <input name = "1xx8" size = "1"> <br>
 <input name = "2xx1" size = "1">
 <input name = "2xx2" size = "1">
 <input name = "2xx3" size = "1">
 <input name = "2xx4" size = "1">
 <input name = "2xx5" size = "1">
 <input name = "2xx6" size = "1">
 <input name = "2xx7" size = "1">
 <input name = "2xx8" size = "1"> <br>
 <input name = "3xx1" size = "1">
 <input name = "3xx2" size = "1">
 <input name = "3xx3" size = "1">
 <input name = "3xx4" size = "1">
 <input name = "3xx5" size = "1">
 <input name = "3xx6" size = "1">
 <input name = "3xx7" size = "1">
 <input name = "3xx8" size = "1"> <br>
 <input name = "4xx1" size = "1">
 <input name = "4xx2" size = "1">
 <input name = "4xx3" size = "1">
 <input name = "4xx4" size = "1">
 <input name = "4xx5" size = "1">
 <input name = "4xx6" size = "1">
 <input name = "4xx7" size = "1">
 <input name = "4xx8" size = "1"> <br>
 <input name = "5xx1" size = "1">
 <input name = "5xx2" size = "1">
 <input name = "5xx3" size = "1">
 <input name = "5xx4" size = "1">
 <input name = "5xx5" size = "1">
 <input name = "5xx6" size = "1">
 <input name = "5xx7" size = "1">
 <input name = "5xx8" size = "1"> <br>
 <input name = "6xx1" size = "1">
 <input name = "6xx2" size = "1">
 <input name = "6xx3" size = "1">
 <input name = "6xx4" size = "1">
 <input name = "6xx5" size = "1">
 <input name = "6xx6" size = "1">
 <input name = "6xx7" size = "1">
 <input name = "6xx8" size = "1"> <br>
 <input name = "7xx1" size = "1">
 <input name = "7xx2" size = "1">
 <input name = "7xx3" size = "1">
 <input name = "7xx4" size = "1">
 <input name = "7xx5" size = "1">
 <input name = "7xx6" size = "1">
 <input name = "7xx7" size = "1">
 <input name = "7xx8" size = "1"> <br>
 <input name = "8xx1" size = "1">
 <input name = "8xx2" size = "1">
 <input name = "8xx3" size = "1">
 <input name = "8xx4" size = "1">
 <input name = "8xx5" size = "1">
 <input name = "8xx6" size = "1">
 <input name = "8xx7" size = "1">
 <input name = "8xx8" size = "1"> <br> <br>
 <br>
 <button type = "button" onClick = "{jetzt = eingabe(); nextgen = verarbeitung(jetzt); ausgabe(nextgen);}"> Next Generation </button>
</form>
</body>

你解决了这个问题吗？我的回答有帮到你吗？ - dWinder
是的，我解决了这个问题。有两个问题。首先，在countNeighbors函数中，我将maxY = y -1写成了y +1，导致了奇怪的'-1'属性错误。另一个问题在于input函数。它给了我一个错误，并说我没有定义矩阵。因此，在游戏规则部分之前，我只是给棋盘的每个单元格赋值0，然后查看表单并用用户输入的值替换了这些值。 - CubeMage
1个回答
1
我找到了问题，大家。它在berechne_nachbarn函数中，在该程序计算游戏棋盘上每个单元格的邻居时。具体来说，在这部分代码中：
if (y == 8) {rechts = 8} else {rechts = y - 1}

y - 1 应该改为 y + 1。

附：程序现在可以正常工作，我感到非常自豪 ^_^

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