MongoDB is better when you are querying array elements. Let us use the following syntax for querying array elements −db.yourCollectionName.find({yourArrayFieldName:"yourValue"}).pretty();The above syntax will return all those documents which have the value “yourValue” in an array field.To understand the concept, let us create a collection with the document. The query to ... Read More

To add value in Octet Tuple, you need to use the addAtX() method. Here, X is the index wherein you need to add the value i.e. to add value at index 0, use the addAt0() and value as a parameter.Let us first see what we need to work with JavaTuples. ... Read More

This example demonstrate about How to find Second most repeated string in a sequence in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. ... Read More

You can achieve this with the help of $addFields operator. To understand the concept, let us create a collection with the document. The query to create a collection with a document is as follows −> db.addFieldDemo.insertOne({"EmployeeId":101, "EmployeeName":"Larry", "EmployeeDetails":{    "EmployeeSalary":65000, "EmployeeCity":"New York", "Message":"Hi"}}); {    "acknowledged" : true,    "insertedId" ... Read More

Sometimes, you may come across a situation, when you want to have a function, which can take variable number of arguments, i.e., parameters, instead of predefined number of parameters. The C/C++ programming language provides a solution for this situation and you are allowed to define a function which can accept ... Read More

You can easily iterate through Octet Tuple using a for the loop. Let us first see what we need to work with JavaTuples. To work with Octet class in JavaTuples, you need to import the following package −import org.javatuples.Octet;Note − Download JavaTuples Jar library to run JavaTuples program. If you ... Read More

Here we will see what type of operations can be performed on struct variables. Here basically one operation can be performed for struct. The operation is assignment operation. Some other operations like equality check or other are not available for stack.Example#include typedef struct { //define a structure for complex ... Read More

This example demonstrate about How to Sort a stack in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml.     In the above ... Read More

The contains() method of the Ennead Tuple in Java is used to search for a value in the Tuple. To find the existence of a value, you need to just set it as a parameter of the method. It returns a boolean value i.e. TRUE is returned for the existence ... Read More

You can perform distinct with multiple keys with the help of an aggregate framework.To understand the concept, let us create a collection with the document. The query to create a collection with a document is as follows −> db.distinctWithMultipleKeysDemo.insertOne({"StudentName":"Mike", "StudentAge":22, "StudentMathMarks":56}); {    "acknowledged" : true,    "insertedId" : ObjectId("5c7f74488d10a061296a3c53") ... Read More