Apply Tags in Snippets

Pick List:

for (var i = 0; i < oldValue.length; i ++) {
   if (newValue.indexOf(oldValue[i]) == -1) {
      customer.removeTag(oldValue[i]);
   }
}
for (var i = 0; i < newValue.length; i++) {
   customer.addTag(newValue[i], '');
}

Radio Buttons:

if (oldValue) {
   customer.removeTag(oldValue);
}
customer.addTag(newValue);