如何在每天结束时自动将值附加到数组？

Question

I am working on a calorie tracking app where the user inputs values to keep a running calorie total throughout the day. I would like to automatically append this daily value to an array at the end of each day so I can present running averages for the last seven days, fourteen days, and thirty days from the array data.

This seems like a straightforward enough issue, but I've been having trouble finding an answer or relevant example on here or googling in general. Thanks in advance for any assistance or relevant links.

Answer 1

Don't append the value at the end of the day, append it the first time someone performs an action on the next day. You can use Date() to work out what day it is. If the day has changed since the last input then append the previous totals to the array.