push_and_sort.js

> db.game.insert({
      "_id": "55555", 
      "scores": [223, 220, 190, 176, 151, 139, 124, 123, 80, 57]
  })
> db.game.update(
      { "_id": "55555" },
      { 
          $push: {
               scores: {
                  $each: [72],
                  $sort: -1,
                  $slice: 10,
              }
          }
      }
  )
> db.game.find({ "_id": "55555" })
{ "scores" : [223, 220, 190, 176, 151, 139, 124, 123, 80, 72] }