Event.coffee

# Eventクラスの作成
# Immutable.jsが必要
class Event
  constructor: ->
    @funcs = new Immutable.Set()
    
  register: (func) ->
    @funcs = @funcs.add(func)
    
  unregister: (func) ->
    @funcs = @funcs.delete(func)
    
  fire: () ->
    @funcs.forEach (func) ->
      func()
      true

Event.create = () ->
  event = new Event()
  
  methods = ['register', 'unregister', 'fire']
  methods.forEach (method) ->
    event[method] = event[method].bind(event)

  event

# Eventクラスの使い方
e = Event.create()
e.fire()

f = () -> console.log 'Hi'
f2 = () -> console.log 'Ho'
e.register f
e.register f2
e.fire()

e.unregister f

e.fire()