Find centralized, trusted content and collaborate around the technologies you use most.
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
如何在不更新数据库集合的情况下获取数组中的字段?我需要一个数组中的一个字段来获取 Node js 中的代码。例如我有
{ "_id" : ObjectId("abcs1234566"), "name": "A" }, { "_id" : ObjectId("sfdghjk234"), "name": "B" }, { "_id" : ObjectId("hgfd765"), "name": "C" }
我需要的结果是[A,B,C]。
您可以使用 javascript 地图功能:
const dbResult = [{ "_id" : "abcs1234566", "name": "A" }, { "_id" : "sfdghjk234", "name": "B" }, { "_id" : "hgfd765", "name": "C" }]; const names = dbResult.map(x => x.name); console.log(names);