remove common elements from two arrays in appscript? - arrays

Question

I have a google sheet. I am try to get all tab names in to array. I used this code.
function allTabNames() {
try{
var out = new Array();
var sheets = SpreadsheetApp.getActiveSpreadsheet().getSheets();
for (var i =0; i<sheets.length; i++) out.push([sheets[i].getName()]);
Logger.log(out);
Logger.log(out.length);
return out
}
catch (er){
Logger.log(er);
}
}
It's working correctly. Now I want to remove some tab names. I created a new array using the tab names I want to remove.
var duparray = ["Sheet1", "newRoad147", "Sheet2", "Sheet3", "Sheet4","Sheet5", "Sheet6"];
When I run the first mentioned code I will get this. The array "out".
[[Sheet1], [newRoad147], [Sheet2], [Sheet3], [Sheet4], [Sheet5], [Sheet6], [Sheet7], [AddData], [WCO069], [WCO065], [WCO149], [WCO141], [WCO158], [BarChart], [Sheet11]]
I am trying to remove the common element in these two arrays. For that I used the following code. But it did not go well.
function allTabNames() {
try{
var out = new Array();
var sheets = SpreadsheetApp.getActiveSpreadsheet().getSheets();
for (var i =0; i<sheets.length; i++) out.push([sheets[i].getName()]);
Logger.log(out);
Logger.log(out.length);
//return out
var duparray = ["Sheet1", "newRoad147", "Sheet2", "Sheet3", "Sheet4","Sheet5", "Sheet6"];
var outx = out.filter( function( el ) {
return duparry.indexOf( el ) < 0;
} );
}
catch (er){
Logger.log(er);
}
Logger.log(outx);
}
The order of these tabs can be changed. That is why I try to remove the element using the specific names of the elements in the array. Then we hope to create a dropdown list of elements in this new array using data validation.

Answer 1

Get Sheet names and omit not included
function getTabName() {
const ss = SpreadsheetApp.getActive();
const nincl = ['Sheet1','Sheet2'];//not included
const shts = ss.getSheets().filter(sh => !~nincl.indexOf(sh.getName())).map(sh => sh.getName());
ss.getSheetByName('Sheet5').getRange("C5").setDataValidation(SpreadsheetApp.newDataValidation().requireValueInList(shts,true).build());
return shts;
}