Google Apps Script - Hide Rows Older Than a Month - google-apps-script

Question

I found this solution but am struggling to get it to work on my sheet.
The user who submitted that question had 3 header rows and wanted the script to only work on row 4 and down. I have 1 header, and as such need the script to work on row 2 and down.
I've got it leaving row 1 alone - but it ONLY hides rows 2 and 3. I can't figure out where I'm going wrong.
function onOpen() {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var menuItems=[{name: 'HideRows', functionName: 'hideRows'}];
ss.addMenu('Hide Rows', menuItems);
};
function hideRows() {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var s = ss.getSheetByName("Responses");
var v = s.getRange("B:B").getValues();
var today = new Date();
var m = today.getMonth();
for(var i=3;i<v.length;i++)
if(v[i][0]=="" || v[i][0].getMonth()>=m) break;
if(i>1) s.hideRows(2,i-1)
};
ETA: Here's a link to my sheet/script: https://docs.google.com/spreadsheets/d/1PkB1_hlJoI-iFYTAN8to_ES9R8QyUxEgPsWtSTUmj8U/edit?usp=sharing

Answer 1

function hideRows() {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var s = ss.getSheetByName('Responses');
// start range from B2 skipping header
// join() + split(',') converts 2D array into plain array
// filter(Boolean) skips all the blank cells in column
var v = s.getRange('B2:B').getValues().join().split(',').filter(Boolean);
// today in milliseconds for date comparison
var today = new Date().getTime();
// one month in milliseconds
var oneMonth = 2629746000;
Logger.log(v.length);
for (var i=0;i<v.length;i++) {
// Date Object from cell in B2:B in milliseconds
var vDate = new Date(v[i]).getTime();
// exit for loop when first date less than one month is found
if (today - vDate <= oneMonth) {
break;
}
}
Logger.log(i+1);
s.hideRows(2, i);
}

Answer 2

You have a syntax error on your for loop as well as the if statements. There should be {} the code to be worked on when in these portions. Then there is an error in your logic. The month of October in row 2 is greater than the current month, February. So you may want to first compare Years for the highest year and then compare months:
function hideRows() {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var s = ss.getSheetByName("Responses");
var v = s.getRange("B:B").getValues();
var today = new Date();
var m = today.getMonth();
var y = today.getYear();
for(var i=3;i<v.length;i++){
if(v[i][0] === "" || v[i][0].getYear() >= y){
if(v[i][0].getMonth() >= m) {
var stophere = 0;
break;
}
}
}
if(i>1) {
s.hideRows(2,i-1);
}
};

Answer 3

function onOpen(e) {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheet = ss.getSheetByName('Responses');
var today= new Date();
var today=today.setDate(today.getDate()-30); //minus 30 days
for ( var i = sheet.getLastRow(); i >= 2 ; i-- ) {
var filter = sheet.getRange(i, 2).getValue();//Evaluates Column B
if ( filter.valueOf() < today.valueOf()) {
sheet.hideRows(i); }
}
}