问题

我有一个程序，其行为取决于属性的数据类型。在这个程序中，我可以通过类似以下方式设置数据类型：

```js
const myObject = new MyObject ();
myObject.numberType = number
myObject.main()

我想能够从一个 json 文件中读取数据类型，但我不能直接在 json 中记录数据类型，我能做的最好的就是记录一个包含与数据类型匹配的文本的字符串。

例如：

{
    "type1": "number",
    "type2": "string"
}

我想要将我的程序改成下面的样子，并使其表现相同：

import types from './types.json' assert { type: "json" };
// const types = require ('./types.json'); // 如果使用 es5

const myObject = new MyObject ();
myObject.numberType = types['type1'];  // 这行需要做一些改变
myObject.main()

MRE

json

{
    "type1": "number",
    "type2": "string"
}

js

import types from './types.json' assert { type: "json" };

async function main () {

    const type1 = typeof (types['type1']);
    const type2 = typeof (types['type2']);

    console.log (type1);
    console.log (type2);

};

main ();

当前输出

string
string

期望输出

number
string

不过，我需要将实际的数据类型保存在变量中，而不是匹配数据类型的字符串。
我基本上是想在一个 json 文件中记录我的数据类型，并让我的程序以某种方式读取它。

<details>
<summary>英文:</summary>

I have a program that behaves differently depending on what the datatype of an attribute is. Within this program I can set the data type by doing something like

const myObject = new MyObject ();
myObject.numberType = number
myObject.main()

I want to be able to read the data type from a json file, but I cannot record the data types literally within the json, the best I can do is record a string containing text that matches the data type

For example

```json
{
    "type1": "number",
    "type2": "string"
}

I would like to change my program to look more like the program below and have it behave the same

import types from './types.json' assert { type: "json" };
// const types = require ('./types.json'); // if using es5

const myObject = new MyObject ();
myObject.numberType = types['type1'];  // This line will need some changing
myObject.main()

MRE

json

{
    "type1": "number",
    "type2": "string"
}

js

import types from './types.json' assert { type: "json" };

async function main () {

    const type1 = typeof (types['type1']);
    const type2 = typeof (types['type2']);

    console.log (type1);
    console.log (type2);

};

main ();

current output

string
string

desired output

number
string

I need to save the actual types in the variables though, not strings whose text matches the type

I'm basically trying to record my data types within a json file and have my program read it somehow

答案1

得分: 1

const type1 = types['type1'];
const type2 = types["type2"];

const type1 = types['type1'];
const type2 = types["type2"];