上海大型企业有哪些_平台公司股权投资_电商网页制作代码_湖南人文科技学院地址

上海大型企业有哪些_平台公司股权投资_电商网页制作代码_湖南人文科技学院地址 {typedef struct format{string title;string url;string content;uint64_t docid;//文档id}Format;typedef struct Inverted_zipper//倒排拉链{uint64_t docid;//文档idstring keyword;//关键词int weight;//权重Inverted_zipper():weight(0){}}Inverted_zipper;class index{private:vector<Format> Front_index;//正排索引下标模拟文档idunordered_map<string,vector<Inverted_zipper>> inverted_index;//倒排关键词与多个(一个)倒排拉链的对应static index * Index;static mutex mtx; index(const index &)=delete;index& operator=(const index&)=delete;index(){}public:~index(){}static index* GetIndex(){if(nullptr == Index){mtx.lock();if(nullptr == Index){Index = new index();}mtx.unlock();}return Index;}//id获得文档内容Format* GetFront_index(uint64_t docid){if(docid>=Front_index.size()){LOG(Warning,"docid>=Front_index.size");return nullptr;}return &Front_index[docid];}//关键词获得倒排拉链vector<Inverted_zipper>* Getinverted_index(const string &keyword){auto it = inverted_index.find(keyword);if(it == inverted_index.end()){LOG(Warning,"keyword find Warning");return nullptr;}return &(it->second);}//建立索引数据源:parser处理完的数据bool Establish_index(const string &raw){ifstream in(raw,ios::in | ios::binary);if(!in.is_open()){LOG(Warning,"in.is_open Warning");return false;}string temp;int count =0;while(getline(in,temp)){Format* doc = Establish_Front_index(temp);//建立正排索引if(doc == nullptr){LOG(Warning,"Establish_Front_index warning");continue;}bool flag = Establish_inverted_index(*doc);//建立倒排索引count++;LOG(Info,"当前已经建立索引的文档 :" + to_string(count));}return true;} private:Format* Establish_Front_index(string &temp){}bool Establish_inverted_index(Format &doc)//建立倒排{}};index * index::Index = nullptr;mutex index::mtx;">