template<class InputIterator> typename iterator_traits<InputIterator>::difference_type distance (InputIterator first, InputIterator last); Return distance between iterators Calculates the number of elements between first and last. // advance e
svn关键词BASE, HEAD, COMMITTED, PREV可以很方便用于日常操作中,但是很多人对他们的工作原理和方式不是太了解. 在这里我将使用用例,诠释他们的作用和意图. 先给出svn手册中对他的解释: "HEAD" latest in repository "BASE" base rev of item's working copy "COMMITTED" last commit at or befor