Tally custom fields

gistfile1.txt

function tallyCustomFieldsForList(notification)
{
  var notif = new Notification(notification);
  notif.movedCard();
  tallyCustomFieldForList(notif.listBefore());
  tallyCustomFieldForList(notif.listAfter());
}

function tallyCustomFieldForList(list)
{
  var total = 0;
  
  list.cards().each(function(card)
  {
    total += parseInt(card.customFieldValue("Something to Tally"));
  });
  
  if(parts = /(.+) \([0-9]+\)/.exec(list.name()))
    var base_list_name = parts[1];
  else
    var base_list_name = list.name();
    
  list.setName(base_list_name+" ("+total+")");
}