目录容器算法查找去重排序迭代器差值遍历容器复制元素全排列取集合搜索容器算法
What is the $1? Is that the match found for (\\d+)? $line =~ /^(\\d+)\\s/; next if(!defined($1) ) ; $paperAnnot{开发者_运维技巧$1} = $line;