wait.coffee

wait = (functions, cb)->
  completed = []
  functions.forEach (func, index)->
    func ()->
      if completed.indexOf(index) is -1
        completed.push(index)
      if completed.length is functions.length
        cb()

wait [
  (cb)->
    setInterval ()->
      console.log 1
      cb()
    , 1000
  (cb)->
    setInterval ()->
      console.log 2
      cb()
    , 100
], ()->
  console.log('done')