How to filter array inside mongoDB document, so it will return a document with filtered array inside.

MongoDb-FilteredArray-Source.js

/* 1 */
{
    "_id" : "joe",
    "name" : "Joe Bookreader",
    "addresses" : [ 
        {
            "street" : "123 Fake Street",
            "city" : "Faketon",
            "state" : "MA",
            "zip" : "12345"
        }, 
        {
            "street" : "1 Some Other Street",
            "city" : "Boston",
            "state" : "MA",
            "zip" : "12345"
        }
    ]
}

/* 2 */
{
    "_id" : "driver",
    "name" : "Driver X",
    "addresses" : [ 
        {
            "street" : "123 Fake Street 12222",
            "city" : "Faketon",
            "state" : "MA",
            "zip" : "11111"
        }, 
        {
            "street" : "1 Some Other Street 34",
            "city" : "Boston",
            "state" : "MA",
            "zip" : "12345"
        }
    ]
}

MongoDb-FilteredArray.js

db.getCollection('sample').aggregate(
  {
    "$match": {
      "addresses.zip" : "11111"
       }
  },
  {
    "$unwind" :"$addresses"
  }, 
  {
    "$match": {
       "addresses.zip" : "11111"
    }
  },
  {
    "$group" : {
        "_id": "$_id",
        "addresses" :{
             "$addToSet" : "$addresses"
        }
    }
  )

http://stackoverflow.com/questions/33531808/mongodb-c-sharp-aggregation-unwind-groupby