Javascript TypeError：无法将未定义转换为对象
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Javascript TypeError: can't convert undefined to object
提问by Robin93K
var horizont, vertikal = new Array ()
for (var i=0; i < 9; i++)
{
horizont[i] = new Array ();
vertikal[i] = new Array ()
}
That's what the console told me:
这就是控制台告诉我的：
TypeError: can't convert undefined to object
类型错误：无法将未定义转换为对象
horizont[i] = new Array ();
(if I would erase it from the code he says the same with vertikal )
（如果我想从代码中删除它，他对 vertikal 说同样的话）
except from some other empty strings getiing born it's the beginning of my code... where is the mistake? Is it so ovious that I don't see it?
除了其他一些空字符串的诞生之外，它是我代码的开始......错误在哪里？是不是太明显了我没看到？
回答by epascarello
The error is because you did not define horizontas an Array. You are using a comma to separate your variable so it is undefined. It does not use the new Array()from vertikal.
错误是因为您没有定义horizont为数组。您正在使用逗号分隔变量，因此它是未定义的。它不使用new Array()from vertikal。
If you take your code
如果你拿你的代码
var horizont, vertikal = new Array ()
And write it out to use multiple variable, the error would pop out.
并写出来使用多个变量，错误会弹出。
var horizont;
var vertikal = new Array();
You need to specify both as Arrays.
您需要将两者都指定为数组。
var horizont = [],
vertikal = [];
