loop through sheet for unmarked value to update Google contacts - loops

Question

I've got a working script that grabs the last row of a Google sheet and pushes the info into Google contacts.
var ss = SpreadsheetApp.getActiveSheet(); //var emailRow = ss.getRange('F2:F').getValues();
var emailRowNum = ss.getLastRow(); //var emailRowNum = emailRow.filter(String).length + 1;
function email() {
var emailNew = ss.getRange(emailRowNum,6).getValue(); //var emailNew = ss.getRange("F"+emailRowNum).getValues();
return emailNew;}
function givenName() {
var fname = ss.getRange(emailRowNum,4).getValue();
return fname;}
function lastName() {
var lname = ss.getRange(emailRowNum,5).getValue();
return lname;}
function loc() {
var street = ss.getRange(emailRowNum,8).getValue();
var city = ss.getRange(emailRowNum,9).getValue();
return street + " " + city;}
function phone() {
var phone = ss.getRange(emailRowNum,7).getValue();
return phone;}
function notes() {
var date = ss.getRange(emailRowNum,1).getValue();
var work = ss.getRange(emailRowNum,2).getValue();
var photo = ss.getRange(emailRowNum,3).getValue();
var site = ss.getRange(emailRowNum,12).getValue();
var find = ss.getRange(emailRowNum,10).getValue();
var referrer = ss.getRange(emailRowNum,11).getValue();
return (date + "\n\n" + work + "\n\n" + photo + "\n\n" + site + "\n\n" + find + " " + referrer + "\n\n-- eom --\n\n");}
function create() {
var fname = givenName();
var lname = lastName();
var contact = ContactsApp.createContact(fname, lname, email());
var group = ContactsApp.getContactGroup('emf');
group.addContact(contact);
var contacts = ContactsApp.getContactsByName(fname + ' ' + lname);
var setaddress = contacts[0].addAddress(ContactsApp.Field.HOME_ADDRESS,loc());
var setphone = contacts[0].addPhone(ContactsApp.Field.MAIN_PHONE,phone());
for (var i in contacts) {
contacts[i].setNotes(notes());
}
}
I'd like to modify it so that instead of grabbing the last row, it checks a column for a (not) value. If value is not found, then update Google contacts with that row's information.
Currently, I'm getting a 'Range not found' error ...
function info(){
var ss = SpreadsheetApp.getActiveSheet();
var data = ss.getRange("N1:N").getValues();
for(var n=0;n<data.length;n++){
if(data[n-1] != 'done'){
var email = ss.getRange("F"+n).getValue(); // Range not found error
var fname = ss.getRange("D"+n).getValue();
var lname = ss.getRange("E"+n).getValue();
var city = ss.getRange("I"+n).getValue();
var street = ss.getRange("H"+n).getValue();
var phone = ss.getRange("G"+n).getValue();
var date = ss.getRange("A"+n).getValue();
var work = ss.getRange("B"+n).getValue();
var photo = ss.getRange("C"+n).getValue();
var site = ss.getRange("L"+n).getValue();
var find = ss.getRange("J"+n).getValue();
var referrer = ss.getRange("K"+n).getValue();
var contact = ContactsApp.createContact(fname, lname, email);
var group = ContactsApp.getContactGroup('emf');
group.addContact(contact);
var contacts = ContactsApp.getContactsByName(fname + ' ' + lname);
var setaddress = contacts[0].addAddress(ContactsApp.Field.HOME_ADDRESS,street + " " + city);
var setphone = contacts[0].addPhone(ContactsApp.Field.MAIN_PHONE,phone);
for (var i in contacts) {
contacts[i].setNotes(date + "\n\n" + work + "\n\n" + photo + "\n\n" + site + "\n\n" + find + " " + referrer + "\n\n-- eom --\n\n");}
}
}
}

Answer 1

1 is the first row using A1Notation with getRange(). The first iteration is trying to getValue() of F0. Changing the n to start at 1 and n <= data.length should get the ranges you are looking for.
...
for(var n=1;n<=data.length;n++){
if(data[n-1] == 'done'){
var email = ss.getRange("F"+n).getValue(); // Range not found error
...
edit: One thing to note the var data = ss.getRange("N1:N").getValues(); range is going to loop over all 1000 default rows. This may not be ideal if your data set is significantly smaller than 1000 rows.