multiple inheritance in coffeescript

multiinherit.coffee

class Mixin
  # "Class method". Augment object or class `t` with new methods.
  augment: (t) ->
    (t[n] = m unless n == 'augment' or !this[n].prototype?) for n, m of this
    t.setup()
  # When an object is augmented with at least one mixin, call this method to
  # remove `mixin`.
  eject: (mixin) ->
    (delete this[n] if m in (p for o, p of mixin::)) for n, m of this
  # Implement in your mixin to act as a constructor for mixed-in properties
  setup: ->


class subHelper1 extends Mixin
  #setup can act as constructor
  setup: ->
    @h1= "ooxoooxx"
  smalltask1: ->
    console.log "subHelper1 do smalltask1 for #{@nm}"

class subHelper2 extends Mixin
  #setup can act as constructor
  setup: ->
    @h2 = "blahblah"
  smalltask2: ->
    console.log "subHelper2 do smalltask2 for #{@nm}"
  smalltask3: ->
    console.log "subHelper2 do smalltask3 for #{@nm}"

class MainProtocol
  constructor: (@nm)->
    subHelper1::augment this
    subHelper2::augment this

  bigtask: ->
    @smalltask1()
    @smalltask2()
    @smalltask3()

  
mp = new MainProtocol('jj')
mp.bigtask()