使用另一个变量值设置变量名 - Java 脚本

发布于 2024-08-20 20:29:00 字数 191 浏览 6 评论 0原文

我想从变量中获取一个值，然后将其用作另一个变量的名称。我得到这样的信息：

var eval(BodyWeight[i]["ExerciseTitle"]) = BodyWeight[i]["ExerciseVideo"];

这给了我一个错误，“丢失；”在声明之前”。

有什么想法吗？

原文

I want to get a value from a variable then use that as the name for another variable. I got something like this:

var eval(BodyWeight[i]["ExerciseTitle"]) = BodyWeight[i]["ExerciseVideo"];

This is giving me an error, 'missing ; before statement'.

Any ideas?

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回眸一遍 2024-08-27 20:29:00

虽然 eval 将为您提供一种可变变量的形式，但它很混乱，并且可能会导致语法错误：

try {
    eval('var ' + BodyWeight[i]["ExerciseTitle"] + ' = BodyWeight[i].ExerciseVideo');
} catch () {
    // what to do here if BodyWeight[i]["ExerciseTitle"] isn't a valid variabe name?
}

最好使用对象属性而不是局部变量。

thing[BodyWeight[i].ExerciseTitle] = BodyWeight[i].ExerciseVideo;

While eval will give you a form of variable variables, it's messy and potentially leads to syntax errors:

try {
    eval('var ' + BodyWeight[i]["ExerciseTitle"] + ' = BodyWeight[i].ExerciseVideo');
} catch () {
    // what to do here if BodyWeight[i]["ExerciseTitle"] isn't a valid variabe name?
}

Better to use object properties rather than local variables.

thing[BodyWeight[i].ExerciseTitle] = BodyWeight[i].ExerciseVideo;

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森末i 2024-08-27 20:29:00

如果您将当前包含在 eval 中的部分指定为属性，则会更容易。

var myvar = {};
myvar[BodyWeight[i]["ExerciseTitle"]] = BodyWeight[i]["ExerciseVideo"];

无需进行邪恶评估。

It will be easier if you specify the part you currently have enclosed in eval as a property.

var myvar = {};
myvar[BodyWeight[i]["ExerciseTitle"]] = BodyWeight[i]["ExerciseVideo"];

No evil eval necessary.

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深爱成瘾 2024-08-27 20:29:00

如果我明白您希望实现什么：

var eval(BodyWeight[i]["ExerciseTitle"]) = BodyWeight[i]["ExerciseVideo"]; 

//to try and get
var BodyWeight4ExerciseTitle = BodyWeight[i]["ExerciseVideo"];
              ^-//guessing this is an iterator

要实现这一目标，只需执行以下操作：

var key = 'BodyWeight' + i + 'ExerciseTitle';
window[key] = BodyWeight[i]["ExerciseVideo"];

//now you have a global variable "BodyWeight4ExerciseTitle"

If I understand what you are hoping to accomplish:

var eval(BodyWeight[i]["ExerciseTitle"]) = BodyWeight[i]["ExerciseVideo"]; 

//to try and get
var BodyWeight4ExerciseTitle = BodyWeight[i]["ExerciseVideo"];
              ^-//guessing this is an iterator

To accomplish this, just do:

var key = 'BodyWeight' + i + 'ExerciseTitle';
window[key] = BodyWeight[i]["ExerciseVideo"];

//now you have a global variable "BodyWeight4ExerciseTitle"

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