Change value of cell in same row with google script if column has certain value

Question

I am working on a simple tracking tool for products with google Sheets. The top row has components ranging from 1 to 13 for a product. When all the components are checked as

Answer 1

The combined use of formula and scripts means it's not as straightforward as it could be. If you were using a script to perform all the changes, you could just add a timestamp when the rest of the script runs.

As it is, one solution would be to have a script that runs every few minutes to check if column 'R' has the value 'Ready' and column 'S' has no timestamp, and if that's true = Add a current timestamp.

A simple but inelegant way to do this would be:

function timestamp(){

  var sheet = SpreadsheetApp.getActiveSheet();
  var lastRow = sheet.getLastRow()

  for (var i = 1; i <= lastRow; i++){

    var readyRange = sheet.getRange([i], 18);
    var readyValues = readyRange.getValues();

    var timeRange = sheet.getRange([i], 19);
    var timeValues = timeRange.getValues();

    if (readyValues == 'Ready' && timeValues == ''){ // 
      timeRange.setValue(new Date());

      }
    }
}

This will run through all the rows in the spreadsheet and check if they need a timestamp. You can then set a time trigger for this to run every once in a while.

This works fine for small spreadsheets, but I've thrown it together as a solution in a few minutes, so you'll need to make it more efficient if you intend to use it with several thousand rows.