我们正在 MongoDB 上构建一个简化版本的搜索引擎。
样本数据集
{ "_id" : 1, "dept" : "tech", "updDate": ISODate("2014-08-27T09:45:35Z"), "description" : "lime green computer" }
{ "_id" : 2, "dept" : "tech", "updDate": ISODate("2014-07-27T09:45:35Z"), "description" : "wireless red mouse" }
{ "_id" : 3, "dept" : "kitchen", "updDate": ISODate("2014-04-27T09:45:35Z"), "description" : "green placemat" }
{ "_id" : 4, "dept" : "kitchen", "updDate": ISODate("2014-05-27T09:45:35Z"), "description" : "red peeler" }
{ "_id" : 5, "dept" : "food", "updDate": ISODate("2014-04-27T09:45:35Z"), "description" : "green apple" }
{ "_id" : 6, …