copy spreadsheet to a specific folder and remove viewers from the copy - google-apps-script

Question

I'm trying to make a copy of the active spreadsheet to a specific folder, then remove all editors from the copied spreadsheet and keep myself as Owner.
Here is my code :
//Save Spreadsheet in selected folder
function freezeSS(vname,option) {
if (vname != ""){
var mainSs = SpreadsheetApp.getActiveSpreadsheet();
var SSID = mainSs.getId();
var CopyDate = Utilities.formatDate(new Date(), "GMT-3", "dd/MM/yy-HH:mm"); // Function Date + Format
var file = DriveApp.getFileById(SSID);
if (option == "Public") {
var folder = DriveApp.getFolderById("0B_EpGZ420rEUfk1mZ2Z3RmFKUk9xaGd1bm1CdGhmZ0FCbTdVT2p2MUlJY3NZUTV0MTR0LTQ");
file.makeCopy(vname + "_" + CopyDate, folder);
}
else {
var folder = DriveApp.getFolderById("0B_EpGZ420rEUfk9jTl81NXNVOXNhRDF2N2R4c1FGTW9wQTB5Q3dNS25nd1NEejBTWWd1RFk");
var backup = file.makeCopy(vname + "_" + CopyDate, folder);
var editors = backup.getEditors().getEmail();
Logger.log(editors);
var permision = backup.removeEditor(editors);
}
} return false;
}
Everything works but I have a problem in removing editors. I always get an error and still have the same editors as in the original spreadsheet.

Answer 1

As the documentation states, you have 2 options for removeEditor():
removeEditor(user)
or
removeEditor(emailAddress)
You're using neither, you'll need to make a loop in the getEditors() without the getEmail(), this one will also get into the loop, as so:
var editors = backup.getEditors();
for( i in editors ){
var email = editors[i].getEmail();
var permision = backup.removeEditor(email);
}
or shorter:
var editors = backup.getEditors();
for( i in editors )
var permision = backup.removeEditor(editors[i]);
BTW, this was well documented, a ctrl+c ctrl+v from there would almost solve your problem, please take a little more time to fiddle with it.
https://developers.google.com/apps-script/reference/drive/user#getEmail();