Question

Good day everyone!
Working on aprojectmI had to start working with Google Spereadsheet interface and faced a problem I cannot quickly overcome due to not working with JavaScripts ever before.
I have a date in specific format as a string

var date = "2012-08-09";

What I need is to get the next day date as

date = "2012-08-10";

which should include changing not only the day, but month and year too, if necessary.

I’ve tried using date format

  var datum= new Date(date);
  datum.setDate(datum.getDate() + 1);
  date = datum.toString('yyyy-MM-dd');

but the code appears to fail at writing date to datum variable.
What is the best and quickiest way tosolve this litle problem?

Thanks

Answer 1

It sounds like a parsing problem you may have better luck, splitting out the date and putting the parameters in individually, any errors you get would be useful:-

var parts = date.split("-");
var datum = new Date(
  parseInt(parts[0], 10), 
  parseInt(parts[1], 10) - 1, 
  parseInt(parts[2], 10));

There is no built in formatting function for the JavaScript Date object, I’m not sure if the google apps api is any different though. To perform the last line of your code you may either need to write your own functions to extract the data from the JavaScript date object and format it, hint you will also need to write a zerofill function if you want to ensure two digits in your date and month parts of the output.

var formatted = datum.getFullYear() + "-" + 
  zerofill(datum.getMonth() + 1, 2) + "-" + 
  zerofill(datum.getDate(), 2);