new.js

var items = MemoryBank.items,
    removedItems;

removedItems = _.countBy(items, function (item) {
  if (item.memories.completed) {
    return "completed";
  } else if (item.memories.skipped) {
    return "skipped";
  }
});

items = _.reject(items, function (item) {
  return item.memories.completed;
});

items = _.reject(items, function (item) {
  return item.memories.skipped;
});

Logger.info("MemoryBank", removedItems.completed + " completed items removed.",
                          removedItems.skipped + " skipped items removed.",
                          _.size(items) + " items remain.");