stream，做减法，优化搜索代码。

做一个搜索，三个输入条件，求这个条件的交集。起初我的思路是按照操作的流程，一步步的来做这三个筛选。

let searchResults = [];//step1 根据id搜索，得到一个子集。if (searchId) {    //开始按照id查找，查找目标为allData    let eds = allData;    searchResults = this._searchWithId(searchId, eds);    searchFlag = true;}if (searchTime) {    //开始按照searchtime查找,如果searchFlag为true则查找目标为searchResults，否则为allData    searchTime = Number(searchTime);    if (searchFlag === true) {        let srs = [];        srs= this._searchWithMilliSeconds(searchId, searchResults );        searchResults = srs;    } else {        let eds = allData;        searchResults = this._searchWithMilliSeconds(searchId, eds);    }    searchFlag = true;}if (searchWords) {    //开始按照searchwords查找,如果searchFlag为true则查找目标为searchResults，否则为allData    if (searchFlag === true) {        let srs = [];        srs = this._searchWithKeyWord(searchId, searchResults );        searchResults = srs;    } else {        let eds = allData;        searchResults = this._searchWithKeyWord(searchId, eds);    }    searchFlag = true;}let result = searchDataStream;

经过某同事的帮助，采用做减法的思想，数据就像是流一样被filter掉。代码就被缩减了好多。主要是思路和经验，大家看看，细节请忽略

let searchDataStream = allData;if (searchId) {    //开始按照id查找，查找目标为_editLineDatas    searchDataStream = this._searchWithId(searchId, searchDataStream);}if (searchTime) {    //开始按照searchtime查找,如果searchFlag为true则查找目标为searchResults，否则为_editLineDatas    searchTime = Number(searchTime);    searchDataStream = this._searchWithMilliSeconds(searchTime, searchDataStream);}if (searchWords) {    //开始按照searchwords查找,如果searchFlag为true则查找目标为searchResults，否则为_editLineDatas    searchDataStream = this._searchWithKeyWord(searchWords, searchDataStream);}let result = searchDataStream;