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what is the work of .id in this given function [closed]

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what is .id in this given function
function getSelected() {
let answer = undefined;
answerEls.forEach((answerEl) => {
if (answerEl.checked) {
answer = answerEl.id;
}
});
return answer;
}
I tried to find what is .id by console .log but it does does not show any value

can not convert this string to object [closed]

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I can not convert this string to object.Why I am getting this error? please help.
onSignup(data:any){
localStorage.setItem('users',JSON.stringify(data));
let users = JSON.parse(localStorage.getItem('users'));
}

Try using function onSignup(data: any) { localStorage.setItem('users', JSON.stringify(data)); let users = JSON.parse(localStorage.getItem('users') as string); }
If you are using typescript you can't pass a string | undefined when a string is expected.

In javascript how can I convert multiple arrays of two elements into key-values an object? [closed]

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I have an array of objects:
arr = [['name', 'jack'],['age', 18],];
How do I convert it into the following by JavaScript?
{ name: 'jack', age: 18 }

arr = [['name', 'jack'],['age', 18],];
const obj = Object.fromEntries(arr);
console.log(obj);
//{
// "name": "jack",
// "age": 18
//}

Removing Object from Array of Array in Javascript [closed]

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Hey Guys I am exporting some data.
And the challenge I am facing is the data should be in Array of Objects but don't know the data format is Array in Array of Objects.
I can write a script to transform the data to the desired format.
Can anyone help me out with how can I remove the object from the inner array to the outer array?
The data is in this format.
{
"data": [
[
{
"id": "4101"
}
]
]
}
My Resultant Format looks like this
Can anyone help me write a javascript to accomplish this objective
{
"data": [
{
"id": "4104",
}
]
}

Please give a try to this :
var a=obj.data.splice(0, 1);
obj.data.push(a[0]);
or in one line if you want :
obj.data.push(obj.data.splice(0, 1)[0]);
Provided you cannot correct the input at the source.

Getting undefined values from JavaScript array [closed]

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I am getting response something like this in the form JavaScript Object
{
"result": [
{
"invoice_prefix": "INV",
"maximum_invoice_no": "0009"
}
]
}
I am trying to fetch the value of invoice_prefix and maximum_invoice_no
I have written result[0].maximum_invoice_no but I am getting undefined .
I have tried a lot of other ways also but still getting undefined . Please help me and give me some hint

I tried that and it is working as expected. I hope this will be helpful.
let test = {
"result": [
{
"invoice_prefix": "INV",
"maximum_invoice_no": "0009"
}
]
}
document.getElementById("output").innerHTML = "Maximum Invoice No. : " + test.result[0].maximum_invoice_no;
console.log(test.result[0].maximum_invoice_no);
<p id="output"></p>