Failed to convert a string in array format like '[55]' into an actual array

After receiving the payload from another server with query param, which looks like this: "[55]", the goal is to convert it into an array using JavaScript.

The conversion process involves the following steps:

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

However, when attempting to iterate through the converted array using a loop:

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

An unexpected result is obtained, displaying:

[
5
5
]

The question remains: how can this be properly converted into an array format?

Answer №1

All you have to do is extract the data from the JSON string.

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

Answer №2

JSON.stringify is not needed here

const example = JSON.parse("[55]")
console.log(example)

Answer №3

An issue arises with the inner JSON.stringify() function in this scenario. When the method is called, it mistakenly converts "[66]" into ""[66]"", resulting in a string with escaped inner quotes. Consequently, the end result remains as the original string "[66]". Due to the nature of JavaScript strings being iterable, the iteration process yields individual characters as the outcome.

Here is the recommended fix for your situation:

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

Answer №4

Success! It's functioning perfectly.

const b = "[88]";

b = JSON.parse(b);

for (let j in b) {
  console.log(b[j]); //88
}

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