Google form update response options instead of creating a new row - google-apps-script

Question

I would like to edit a response option instead of adding a new response if the timestamp is already present in the reponse spreadsheet.
This is what i have tried.
function trial(event) {
var email = "xxxx#gmail.com";
var ss = SpreadsheetApp.getActiveSheet();
var data = ss.getDataRange().getValues();
var body = '';
//Comapring timestamp in each row with the timestamp entered in the form
var i = 0;
while(i < data.length) {
if(data[i][0].toString() == event.namedValues['Timstamp'].toString()){
body += '\n The row number: ' + i;
data[i][1] = 'ADDDDDDD';
data[i][2] = event.namedValues['Status'].toString();
ss.deleteRow(event.range.getRow());
}
i++;
}
var subject = "Delete Test";
GmailApp.sendEmail(email, subject, body);
}
I am entering the timestamp in the form as a value(I took care of passing the appropriate timestamp, user need not enter it; it would be prefilled). Now if there is a match, it deletes the new response but does not modify the old one. Can anyone point out my mistake.

Answer 1

Your script modifies the data array but doesn't write it back to the spreadsheet...that's why you don't see any change in the spreadsheet.
Just add a line after the loop to update the sheet with the appropriate data. I guess it could be something like
ss.getRange(1,1,data.length,data[0].length).setValues(data);