两个数组对象去重并且根据第一个数据生成一个新的对象？-灵析社区
七安前如果没有看错的话，就是记录一下各会议室在某个小时段是否有开会。说一下解法。 前两个数据是一样的： const thisDate = [ { date: "12", prop: "twelve", }, { date: "13", prop: "thirteen", }, { date: "14", prop: "fourteen", }, { date: "15", prop: "fifteen", }, { date: "16", prop: "sixteen", }, { date: "17", prop: "seventeen", }, { date: "18", prop: "eighteen", }, ]; const data = [ { DATE: "2023-09-04 15:33:54.0", ROOMNAME: "测试会议室1", ROOMID: "001", }, { DATE: "2023-09-04 16:00:00", ROOMNAME: "测试会议室1", ROOMID: "001", }, { DATE: "2023-09-04 17:00:00", ROOMNAME: "测试会议室1", ROOMID: "001", }, { DATE: "2023-09-04 18:00:00", ROOMNAME: "测试会议室1", ROOMID: "001", }, { DATE: "2023-09-04 19:00:00", ROOMNAME: "测试会议室1", ROOMID: "001", }, { DATE: "2023-09-04 20:00:00", ROOMNAME: "测试会议室1", ROOMID: "001", }, { DATE: "2023-09-04 21:00:00", ROOMNAME: "测试会议室1", ROOMID: "001", }, { DATE: "2023-09-04 22:00:00", ROOMNAME: "测试会议室1", ROOMID: "001", }, { DATE: "2023-09-04 23:00:00", ROOMNAME: "测试会议室1", ROOMID: "001", }, { DATE: "2023-09-04 14:53:42.0", ROOMNAME: "会议室2222", ROOMID: "002", }, { DATE: "2023-09-04 15:00:00", ROOMNAME: "会议室2222", ROOMID: "002", }, { DATE: "2023-09-04 16:00:00", ROOMNAME: "会议室2222", ROOMID: "002", }, { DATE: "2023-09-04 17:00:00", ROOMNAME: "会议室2222", ROOMID: "002", }, { DATE: "2023-09-04 18:00:00", ROOMNAME: "会议室2222", ROOMID: "002", }, { DATE: "2023-09-04 19:00:00", ROOMNAME: "会议室2222", ROOMID: "002", }, { DATE: "2023-09-04 20:00:00", ROOMNAME: "会议室2222", ROOMID: "002", }, ]; 使用哈希表做一个前置处理，根据会议室名称进行分组，其值为该会议室开会的小时。 > 注意，此处比较随意。若是严谨一点，应当使用 `ROOMID` 作为 `key`，`value` 也应当使用 `Set` > 作为容器，以免数据量大导致的重复问题。 const map = new Map(); for (const { DATE, ROOMNAME } of data) { map.set(ROOMNAME, [...(map.get(ROOMNAME) ?? []), DATE.slice(11, 13)]); } 最后遍历哈希表，与 `thisDate` 对照一下，即可得到结果： const list = []; for (const [k, v] of map.entries()) { const obj = { name: k, }; for (const { prop, date } of thisDate) { obj[prop] = v.includes(date) ? "1" : ""; } list.push(obj); } console.log("生成新的数组对象"); console.log(list); 结果如下： 生成新的数组对象 [ { name: '测试会议室1', twelve: '', thirteen: '', fourteen: '', fifteen: '1', sixteen: '1', seventeen: '1', eighteen: '1' }, { name: '会议室2222', twelve: '', thirteen: '', fourteen: '1', fifteen: '1', sixteen: '1', seventeen: '1', eighteen: '1' } ]