func doEnum(_data)
  var(i, item, dt, c)
  dt = _data
  c = _arr.mt_count(dt)
  for(i = 0; i < c; i++)
    event(onItem, _arr.mt_pop(dt))
  end
  event(onEndEnum)
end

func doStop(_data)
  i = c
end

func Item()
  return(item)
end

func Index()
  return(i)
end