db.aaaa.update({},{$push:{money:{$each:[8,9,10],$slice:-4}}})
db.aaaa.update({},{$addToSet:{money:{$each:[8,9,10,11,12,13]}}})
db.aaaa.update({},{$pop:{"money":-11}})
db.aaaa.update({},{$pull:{"money":10.0}})
db.coll.updateMany({"rep":31},{$inc:{"rep":3}},{upsert:true})
