gistfile1.txt

////////////////////////////////// task1
db.Film.createIndex({address: "text"})

/////////////////////////////////// task2
db.zadanieMongo.find(
	{
	  age: {$lt: 20},
	  $text: { $search: "California Texas Pennsylvania" }
	},
	{
	  _id: 0,
	  name: 1,
	  age: 1,
	  address: 1
	}
)

///////////////////////////////// task3
db.Film.update({
 $text: {
   $search: "California"
 }
},
{
    $set: {
        activity: [
            {
                data: new Date(),
                hobby: ""
            },
            {
                data: new Date(),
                hobby: ""
            },
            {
                data: new Date(),
                hobby: ""
            },
            {
                data: new Date(),
                hobby: ""
            }
        ]
    }
},
{
	multi: true
})
AFFECTED 5

////////////////////////////////// task4
db.Film.update({
 $text: {
   $search: "California"
 }
},
{
	$push: {
	 	 activity: {
	 	 	$each: [
	 	 		{
	 	 		 	data: new Date(),
	 	 		 	hobby: 'pilka nozna'
	 	 		}
	 		],
	 		$sort: { data: -1 },
	 		$slice: 4
	 	 }
	}
},
{
	multi: true
})
AFFECTED 5

/////////////////////// task5
db.Film.find({
	activity: {
	 	$exists: false
	}
}).count()
RETURNS 238

/////////////////////// task6
db.zadanieMongo.aggregate(
	{
	  $match: 
	  {
	    favoriteFruit: {$exists: true}
	  }
	},
	{
	  $group: 
	  {
	  	_id: "$favoriteFruit",
	  	suma: {$sum: 1}
	  }
	}
)

///////////////////////// task7
db.zadanieMongo.aggregate(
	{
	  $unwind: "$tags"
	},
	{
	  $group: 
	  {
	    _id: "$tags",
	    count: {$sum: 1}
	  }
	}
)


//////////////////////// task8
db.Film.update({
  $text: {
   $search: "Alaska"
  }
},
{
	$inc: {
	  age: 1
	}
},
{
	multi: true
})
AFFECTED 4

////////////////////////// task9
db.Film.find({
 isActive: {
   $exists: true
 }
}).forEach(function (doc) {
	var isActive = doc.isActive;
	if (isActive) {
	  doc.isActive = "yes"
	} else {
	  doc.isActive = "no"
	}

	db.Film.save(doc)
})

//////////////////////// task10
db.zadanieMongo.getIndexes()