Delete a row in Google Sheets when a date has passed - google-apps-script

Question

I have a spreadsheet that I would like to autosort based on date, delete duplicate rows, and delete rows if the date listed has passed. I have the autosort and deleting duplicates, I just need help with deleting rows based on the date. It will delete all rows except row # 2, regardless of date.
So far I have:
function deleteRow1() {
var sheet = SpreadsheetApp.getActiveSheet();
var startRow = 2; // First row of data to process
var numRows = sheet.getLastRow()-1; // Number of rows to process
var dataRange = sheet.getRange(startRow, 2, numRows);
var data = dataRange.getValues();
for (i = 0; i < data.length; i++) {
var row = data[i];
var date = new Date();
var sheetDate = new Date(row);
var Sdate = Utilities.formatDate(date, 'EST-0500', 'MM:dd:yyyy')
var SsheetDate = Utilities.formatDate(sheetDate, 'EST-0500', 'MM:dd:yyyy')
if (Sdate > SsheetDate) {
sheet.deleteRow(i + 2)
}
}
}

Answer 1

So here is about what it could look like, I think. I changed as little as I could about your routine, focusing on the parts that seemed like they were troubling.
In particular, dates are compared to dates, with times removed/equated. Also, it bothered me to repeatedly construct today, so I took that outside the loop.
Also, I worked from the bottom up to make sure deletions did not affect which row to consider next.
function deleteRow1() {
var sheet = SpreadsheetApp.getActiveSheet();
var startRow = 2; // First row of data to process
var numRows = sheet.getLastRow()-1; // Number of rows to process
var dataRange = sheet.getRange(startRow, 2, numRows);
var data = dataRange.getValues();
var today = new Date();
today.setHours(0,0,0,0);
for (i = data.length-1; i > -1; i--) {
var row = data[i];
var sheetDate = new Date(row);
sheetDate.setHours(0,0,0,0);
if (today > sheetDate) {
sheet.deleteRow(i + 2)
}
}
}
It might be a nice touch to change i+2 to startRow+i.