Filter by condtion Master Data - google-apps-script

Question

I created a code that merges different g sheet files together into a master spreadsheet from a given folder. Now I'd like to create a filter in the code which filters column 71 (BT) for only criteria "ABC" and merges the data into one. Would you guys help a brother out?
function myFunction() {
var folder = DriveApp.getFolderById("id");
var filesInterator = folder.getFiles();
var file;
var fileType;
var ssID;
var combinedData = [];
var data;
while(filesInterator.hasNext()){
file = filesInterator.next();
fileType = file.getMimeType();
if(fileType === "application/vnd.google-apps.spreadsheet"){
ssID = file.getId();
data = getDataFromSpreadsheet(ssID);
combinedData = combinedData.concat(data);
} // if ends here
} // while loops ends here
//Logger.log(combinedData.length);
var ws = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("QwERTY");
ws.getRange("A2:BK").clearContent();
ws.getRange(2,1,combinedData.length,combinedData[0].length).setValues(combinedData);
}
function getDataFromSpreadsheet(ssID) {
var ss = SpreadsheetApp.openById(ssID);
var ws = ss.getSheetByName("XYZ");
var data = ws.getRange("A2:KB" + ws.getLastRow()).getValues().filter(r => r[0] != '');
return data;
}

Answer 1

You can add the following lines of code:
let filterCriteria = SpreadsheetApp
.newFilterCriteria()
.whenTextContains("ABC")
.build();
let filter = ws.getRange(1, 71).createFilter();
filter.setColumnFilterCriteria(71, filterCriteria).sort(71, true);
Assuming, that ws is your working sheet and the criteria you're looking for is when text contains "ABC", then the snippet above will create a filter on the ws sheet on the BT1 cell.
However, please bear in mind that depending on the exact criteria of your filter you can modify the current one by taking a look at the methods available for the FilterCriteriaBuilder Class here.
Reference
Apps Script FilterCriteriaBuilder Class;
Apps Script Filter Class;
Apps Script FilterCriteria Class.