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How to convert NaN value to 0 inside app.post in .js file [closed]

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In below code question1 value is coming as NaN. I want to convert it to 0 but I am not able to do it using parseInt. How can I do this?
app.post('/auth/total',function(req,res){
console.log(req.body);
const { question1, question2, question3, question4} = req.body;
let total1 = parseInt(question1) + parseInt(question2)
let total2 = parseInt(question3) + parseInt(question4)
//some code to insert data in db and render the view
});

you can do this:
let total1 = (parseInt(question1) || 0) + (parseInt(question2) || 0)
this will convert any falsy value to 0

How te get an element from .fields [closed]

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I am having trouble getting the property filename from the req.files that I get from the router. Here's what I get:
And here's how I've been trying to get the filename of each (I am only using 2 pictures in this example but I could get more than two images so that's why I am iterating with the forEach)
let arrayImages = [];
if (req.files) {
Array(req.files).forEach(image => {
arrayImages.push(image[0].filename);
})
}

Hi everyone thanks for all the help, i finally figured it out!
let arrayImages = [];
for (const clave in req.files) {
array = req.files[clave]
arrayImages.push(`${array[0].filename}`);
}
that way i've got the fieldname of each element

The root of your data from screen is an object.
So try to code like that:
let arrayImages = [];
if (req.files) {
Object.values(req.files).forEach(arr => {
arrayImages.push(arr[0].filename);
})
}

How to check if all elements in a node list have the same class or the same style property value? [closed]

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I created memory game. The only problem is that when the game is done and the player wins, it doesn't console.log('win)
Code:
let checkingImages = document.querySelectorAll('.card')
checkingImages = Array.from(checkingImages)
let check = checkingImages.every((each)=>{
each.classList.contains('matched')
})
if(check == true){
console.log('win')
}

Inside your every method, you're only checking for the class's existence, not actually returning anything.
You have to write it like this:
let checkingImages = document.querySelectorAll('.card')
checkingImages = Array.from(checkingImages)
let check = checkingImages.every(item => item.classList.contains('matched'))
console.log(check)
Or like this, if you want to stick to your original answer:
let checkingImages = document.querySelectorAll('.card')
checkingImages = Array.from(checkingImages)
let check = checkingImages.every((item) => {
return item.classList.contains('matched')
})
console.log(check)

String's split method shows undefined [closed]

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I am trying to get all characters starting from = inside url:
let url = this.$route.query.item
console.log(typeof(url)) // outputs string
let status = url => url.split('=')[1]
it shows split as undefined. What is the problem and how can be it fixed?

Here is what you want:
let url = "foo=bar";
console.log(typeof (url)) // outputs string
let status = url => url.split('=')[1]
console.log(status(url));// "bar"

I think your this.$route.query.item does not contain = character. if you are looking for current url try this may be
let url = this.$router.currentRoute;
console.log(url); // check if this is the url you expect
let status = 'url does not contain = char';
if(url.includes('='){
status = url.split('=')[1];
}
console.log(status);
note: if you actually need to split this.$route.query.item, console log it and check if it contains = or perhaps add a check for it.

Adding a for loop within a variable declaration [closed]

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Im having trouble looping through the array tabData and storing the new array into 'filteredData'
const filteredData = allData.filter(
({ class }) => tab === tabData[1].tab && class === tabData[1].label,
);
tabData contains the following 0:{Tab:1, Label:'firstTab'} 1:{Tab:2 , Label:'secondTab'} ... and so on

1) You cant use 'class' is reserved word.
2) I guess code should look like:
const filteredData = allData.filter(tab => tab.label === OTHER.label)
Where "OTHER.label" filtering for that label

You’d better take a look at Array.prototype.filter ’doc
var newArray = arr.filter(callback(element[, index[, array]])[, thisArg])
see details