[{_id:ObjectId("618c6718c6a8cc3a84a0b37f"),subscribers:[{userId:ObjectId("618c643545f4ecd43e9b20f7"),points:{daily:50,total:100}},{userId:ObjectId("618c641345f4ecd43e9b20f0"),points:{daily:10,total:80}},{userId:ObjectId("618c648c45f4ecd43e9b20fc"),points:{daily:20,total:80}}],quizzes:[],leaderboards:{daily:[],total:[]},}]

db.collection.aggregate([{"$set":{"leaderboards.daily":{"$function":{"body":"function(arr) {return arr.sort((a,b) => (a.points.daily < b.points.daily) ? 1 : ((b.points.daily > a.points.daily) ? -1 : 0));}","args":["$subscribers"],"lang":"js",},},}}])