class.countable
0 2021/06/08 【接口】
class.outeriterator
class.recursiveiterator
class.seekableiterator
seekableiterator.seek
0 2021/06/08 【The SeekableIterator interface】
recursiveiterator.getchildren
0 2021/06/08 【The RecursiveIterator interface】
recursiveiterator.haschildren
outeriterator.getinneriterator
0 2021/06/08 【The OuterIterator interface】
countable.count
0 2021/06/08 【The Countable interface】