how do you apply code to all tabs on a google sheet - google-apps-script

Question

Novice at the google scripting ... so apologies ..
I have the below code that works ... however I have a further ten tabs that this needs to apply to ... is there a way of writing this so you don't have to reference each active sheet?
the idea is to hide rows and columns automatically if a certain value exists in them ...
function onOpen()
{
var s = SpreadsheetApp.getActive().getSheetByName('O4');
s.showRows(1, s.getMaxRows());
s.getRange('BQ:BQ')
.getValues()
.forEach( function (r, i) {
if (r[0] == 'Done')
s.hideRows(i + 1);
});
var b = SpreadsheetApp.getActive().getSheetByName('O4');
b.showColumns(1, b.getMaxColumns());
b.getRange('135:135')
.getValues()[0]
.forEach(function (r, i) {
if (r && r == 'N') b.hideColumns(i + 1)
});
var s = SpreadsheetApp.getActive().getSheetByName('OG3');
s.showRows(1, s.getMaxRows());
s.getRange('BQ:BQ')
.getValues()
.forEach( function (r, i) {
if (r[0] == 'Done')
s.hideRows(i + 1);
});
var b = SpreadsheetApp.getActive().getSheetByName('OG3');
b.showColumns(1, b.getMaxColumns());
b.getRange('135:135')
.getValues()[0]
.forEach(function (r, i) {
if (r && r == 'N') b.hideColumns(i + 1)
});
}

Answer 1

You can just loop over all of the tabs in your sheet using this snippet.
var sheets = SpreadsheetApp.getActiveSpreadsheet().getSheets();
sheets.forEach(function (sheet) {
callYourFunction(sheet)
})
If you need to on apply your code on particular sheets do this.
var sheets = ['SheetA', 'SheetB', 'SheetG', 'SheetH', 'SheetM']
for (var i = 0; i < sheets.length; i++) {
var sheetName = sheets[i]
var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName(sheetName);
if (sheet != null) {
callYourFunction(sheet)
}
}
Hope that helps