How to Force New Google Spreadsheets to refresh and recalculate?

Question

There were some codes written for this purpose but with the new add-ons they are no longer applicable.

Thanks in advance, Iddo

Answer 1

File -> Spreadsheet Settings -> (Tab) Calculation -> Recalculation (3 Options)
- On change
- On change and every minute
- On change and every hour
This affects how often NOW, TODAY, RAND, and RANDBETWEEN are updated.

but.. .. it updates only, if the functions arguments (their ranges, cells) are affected by that.
  

from my example
I use google spreadsheet to find out the age of a person. I have his birthday date in the format (dd.mm.yyyy) -> it's the used format here in Switzerland.

=ARRAYFORMULA(IF(ISTEXT(K4:K), IF(TODAY() - DATE(YEAR(TODAY()), MONTH(REGEXREPLACE(K4:K, "[.]", "/")), DAY(REGEXREPLACE(K4:K, "[.]", "/"))) > 0, YEAR(TODAY()) - YEAR(REGEXREPLACE(K4:K, "[.]", "/")) + 1, YEAR(TODAY()) - YEAR(REGEXREPLACE(K4:K, "[.]", "/"))), IF(LEN(K4:K) > 0, IF(TODAY() - DATE(YEAR(TODAY()), MONTH(K4:K), DAY(K4:K)) > 0, YEAR(TODAY()) - YEAR(K4:K) + 1, YEAR(TODAY()) - YEAR(K4:K)), "")))

I'm using TODAY() and I did the recalculation settings described above. -> but no automatically refresh. :-(
It updates only, if I change some value inside the ranges where the function is looking for.

So I wrote a Google Script (Tools -> Script Editor..) for that purpose.

function onOpen() {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheetMaster = ss.getSheetByName("Master"); 
  var sortRange = sheetMaster.getRange(firstRow, firstColumn, lastRow, lastColumn);  

  sortRange.getCell(1, 2).setValue(sortRange.getCell(1, 2).getValue());
}

You need to set numbers for firstRow, firstColumn, lastRow, lastColumn

The Script get active when the spreadsheets open, writes the content of one cell into the same cell again. That's enough to trigger the TODAY() function.

Look for more information on that link from Edward Moffett. Force google sheet formula to recalculate

Best regards,
Christoph