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I am fairly new to working with promises and now I got stuck. I read a few articles and SO posts, but I can't get my head around it.

I have a simple API that returns an array of people and some properties like firstname, lastname and d.o.b. I want to check for birthays within the next 10 days. Now I am stuck with the function returning a promise. I want the API to return an array with an array for people and an arry for nextBirthdays.

How do I resolve the promise?

( I know the part with calculating the dates is not the most elegant way to do it )

I thought by using getTimezoneOffset leap years would be catered for

My function

So here is the function I want to test

I am trying making basic Todo list. I have created basic React todo list and save it to my database. I set dueDatetime query where it sets the time. I made query like this:

this is my first ever bit of JavaScript I have tried to use (I have done a fair bit of python before this). I just wrote these two functions for a Google Sheets. When I try and run the function, it gives me the error of "Result was not a number". I have no clue as of where I went wrong because, as I said, I am very new to Javascript and this all just looks alien to me!

I am using bootstrap-datetimepicker to get two Date inputs. Everything works until when I am trying to get the day-difference between the Dates.

I have to calculate the total number of business days between selected dates and I am using the following logic

I created the below class with constant properties so I can use it as sort of enum.