PubSub via jQuery without DOM bindings

pubsub.coffee

# Simple global PubSub system built around $.Callbacks
# Enables PubSub without relying on DOM element bindings
#
# Usage:
#
#     PubSub.subscribe 'foo', (message) -> console.log("Received: #{message}")
#     PubSub.publish 'foo', 'bar'
#     # Outputs: "Received: bar"
$(document).on 'ready', () ->
  window.PubSub = 
    subscriptions: {}

    subscribe: (eventName, callbackFn) ->
      @subscriptions[eventName] ?= $.Callbacks()
      @subscriptions[eventName].add(callbackFn)
      console.log("Subscribing to #{eventName}")

    unsubscribe: (eventName, callbackFn) ->
      @subscriptions[eventName]?.remove(callbackFn)
      console.log("Unsubscribing to #{eventName}")

    publish: (eventName, args) ->
      @subscriptions[eventName]?.fire(args)
      console.log("Publishing #{eventName}")

    reset: () ->
      @subscriptions = {}
      console.log('PubSub subscriptions reset')