javascript - 类型错误 : arrayal[i] is undefined but it is defined

Question

我有一个像这样创建的数组:

var gelenveri = document.getElementById("cakalinput").value;

var arrayal = [];

arrayal = gelenveri.split(" ");

我在函数中使用这个 arrayal，但在另一个 for 循环中的 while 语句中出现错误(TypeError: arrayal[i] 未定义，但已定义):

while(((!(arrayal[i].indexOf('%') > -1)) || (arrayal[i] != "-") )){

temizarray[j] = temizarray[j] + arrayal[i];
i++;


}

当我尝试查看 typeof(arrayal[i]) 时，它是字符串类型。我花了一个小时都无法解决这个问题。有什么想法吗？

这是我的整个代码:

function cakallik() {
    var gelenveri = document.getElementById("cakalinput").value;
    var arrayal = [];
    arrayal = gelenveri.split(" ");
    var uzunluk = arrayal.length;
    var temizarray = [];
    var j = 0;
    var i = 0;

    for (; i < uzunluk;) {
        temizarray[j] = arrayal[i]; //ilk satır alındı
        i++;
        j++;
        temizarray[j] = arrayal[i]; //ikincisatır alındı
        i++;
        j++;
        temizarray[j] = arrayal[i]; //üçüncü satır alındı
        i++;
        j++;
        temizarray[j] = arrayal[i]; //dördüncü alındı
        i++;
        j++;
        temizarray[j] = arrayal[i]; // beşinci alındı
        i++;

        while (arrayal[i] != "-") {
            temizarray[j] = temizarray[j] + arrayal[i];
            i++;
        }

        i++;
        j++;
        temizarray[j] = arrayal[i];
        i++;
        console.log(typeof (arrayal[i]));

        while (((!(arrayal[i].indexOf('%') > -1)) || (arrayal[i] != "-"))) {
            temizarray[j] = temizarray[j] + arrayal[i];
            i++;
        }

        i++;
        j++;
        temizarray[j] = arrayal[i];
        i++;
        j++;
        temizarray[j] = arrayal[i];
        i++;
        i++;
        j++;
        temizarray[j] = arrayal[i];
        i++;
        j++;
        temizarray[j] = arrayal[i];
        i++;
        i++;
        j++;
        temizarray[j] = arrayal[i];
        i++;
        j++;
        temizarray[j] = arrayal[i];
        i++;
        i++;
        j++;
        temizarray[j] = arrayal[i];
        i++;
        j++;
        temizarray[j] = arrayal[i];
        i++;
        i++;
        j++;
        temizarray[j] = arrayal[i];
        i++;
        j++;
        temizarray[j] = arrayal[i];
        i++;
        i++;
        j++;
        temizarray[j] = arrayal[i];
        i++;
        j++;
        temizarray[j] = arrayal[i];
        i++;
        i++;
        j++;
        temizarray[j] = arrayal[i];
        i++;
        j++;
        temizarray[j] = arrayal[i];
    }

    console.log(temizarray);
}

Answer 1

arrayal[i] is undefined

错误信息非常清楚。虽然 arrayal 已定义，但 arrayal[i] 未定义，因为您试图访问该数组中未出现的元素。

简而言之，你的数组 arrayal 长度小于 i，你应该在 while 中添加一个条件来检查 arrayal 的长度。

while(arrayal.length < i && ((!(arrayal[i].indexOf('%') > -1)) || (arrayal[i] != "-") )){

temizarray[j] = temizarray[j] + arrayal[i];
i++;


}