# А вот это можно классно отрефакторить при помощи SugarJS (или любого аналога вроде Underscore, LoDash)

# look for any left subscribers
subscriberFound = false
for subscriberName, subscriber of evt.subscribers
  if !!subscriber
    subscriberFound = true
    break

# remove event binding if nobody listens
if !subscriberFound
  evt.unsubscribe()
  delete @events[eventName]


# Стало

if Object.any evt.subscribers, subscriber
  evt.unsubscribe()
  delete @events[eventName]