numbers = _objectWrappers.wrap(_arrays.arrayOf(_plugins.loadClass("java.lang.Long"), 1, 2, 3, 4, 5))
# 计算累积和, 累积和: [0, 1, 3, 6, 10, 15]
numbers.runningFold(0, lambda acc, element: acc + element).forEach(lambda it: _console.log(it))