callbackを使って協調的に動作するクラスの例を示すためのコード

tashitari-kaketari.coffee

class TasuHito
  constructor: (base) ->
    @base       = base
    @tashitaAto = null

  tasu: (number) =>
    result = number + @base
    console.log result

    setTimeout =>
      @tashitaAto(result) if @tashitaAto
    , 1000


class KakeruHito
  constructor: (base) ->
    @base      = base
    @kaketaAto = null

  kakeru: (number) =>
    result = number * @base
    console.log result

    setTimeout =>
      @kaketaAto(result) if @kaketaAto
    , 1000


tasuHito   = new TasuHito(3)
kakeruHito = new KakeruHito(2)

tasuHito.tashitaAto  = kakeruHito.kakeru
kakeruHito.kaketaAto = tasuHito.tasu

tasuHito.tasu(1)