无法将数组格式为“ [55]”的字符串转换为数组

Question

I receive the following from another server in my payload as query param:

"[55]"

Now I want to convert it to an array in JavaScript,

Here is what I do:

var termssValidation= JSON.parse(JSON.stringify(event.termsQuery));

But when I run the following:

for(var t in termssValidation ){
    console.log(termssValidation[t]);
}

I get 3 lines as follows:

[
5
5
]

How can I convert the above to an array properly?

Answer 1

您只需要解析JSON字符串。

 console.log(JSON.parse('[55]')); 

Answer 2

JSON.stringify is excess

 let j = JSON.parse("[55]") console.log(j) 

Answer 3

The problem is the inner JSON.stringify(). This method converts the "[66]" into ""[66]"". JSON.parse then converts this string as if the inner quotes were escaped. So the result is the original string "[66]". Because the String in javascript is an iterable you get the individual characters as the result of the iteration.

This is the solution to your problem:

var termssValidation= JSON.parse(event.termsQuery);

Answer 4

This code works!

 let a = "[55]"; a = JSON.parse(a); for (let i in a) { console.log(a[i]); //55 }