Date.Add Syntax?

Help & Support
1

Not for the first time I find myself struggling to work out how to apply a script method. :confused: In the attached example I am trying, and failing, to add 1 hour to a modified date. Could some kind soul please point me in the right direction. :slight_smile:

Regards, AB


2

Date.Add modifies the date object it is used on, and does not return anything:

e2b66bdaba8e838f857991c7ad79b9c584f2475b.png863×225 7 KB

Instead of:

new_date_obj = date_obj.Add(1,"h");

Try:

new_date_obj = date_obj.Clone(); new_date_obj.Add(1,"h");

(BTW, it's good to paste the text version of code for questions like this, so people can quickly try it out without having to type everything from a screenshot.)

3

Good point re text vs screen shot. Your Add code sample using a clone date object works fine. Given that the original date_obj variable is also a date object I would expect the second Add to work but it doesn't.

Regards, AB

var src = DOpus.listers.lastactive.activetab;
var n = src.selected.count;
var date_obj;
var new_date_obj;
DOpus.clearoutput;
for (var i = 0; i < n; i++){
	date_obj = src.selected(i).modify;
	DOpus.output(date_obj);
	new_date_obj = date_obj.Clone();
	new_date_obj.Add(1,"h"); // This works on the clone
	DOpus.output(new_date_obj);
	date_obj.Add(1,"h"); // Not clear to me why this doesn't work
	DOpus.output(date_obj);
}

Output:

21/10/2016 12:10:28
21/10/2016 13:10:28
Error at line 12, position 2
A method was called unexpectedly (0x8000ffff)
4

Ah, that is because the Date objects Item returns are all set as read-only, to avoid accidentally modifying them (since it would change what item.modified returned if you called it a second time).

5

Thanks. Makes sense.

Regards, AB