In C++, we can use the function overloading. Now the question comes in our mind, that, can we overload the main() function also?Let us see one program to get the idea.Example#include using namespace std; int main(int x) {    cout

To search a sub-filed in MongoDB, you can use double quotes along with dot notation. Let us first create a collection with documents −> db.searchSubFieldDemo.insertOne( ...   { ...      "UserDetails": ...      {"UserEmailId":"John123@gmail.com", "UserAge":21} ...   } ... ); {    "acknowledged" : true,    "insertedId" : ... Read More

In C++, the friendship is not inherited. It means that, if one parent class has some friend functions, then the child class will not get them as friend.In this example it will generate an error because the display() function is friend of MyBaseClass but not the friend of MyDerivedClass. The ... Read More

Let us first create a collection with documents −>db.missingDocumentDemo.insertOne({"StudentFirstName":"Adam", "StudentLastName":"Smith"}); {    "acknowledged" : true,    "insertedId" : ObjectId("5cd3fb1eedc6604c74817ce6") } >db.missingDocumentDemo.insertOne({"StudentFirstName":"Carol", "StudentLastName":"Taylor"}); {    "acknowledged" : true,    "insertedId" : ObjectId("5cd3fb29edc6604c74817ce7") } >db.missingDocumentDemo.insertOne({"StudentFirstName":"David", "StudentLastName":"Miller", "StudentAge":21}); {    "acknowledged" : true,    "insertedId" : ObjectId("5cd3fb40edc6604c74817ce8") }Following is the query to display ... Read More

To disable only the vertical scrollbar, use the VERTICAL_SCROLLBAR_NEVER constant, which displays only the horizontal scrollbar.The following is an example to disable only the vertical scrollbar in Java −Examplepackage my; import java.awt.BorderLayout; import java.awt.Dimension; import javax.swing.Box; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JScrollPane; public class SwingDemo {    public static void ... Read More

This example demonstrate about How can I marquee the text content in Android Notification.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 use aggregate framework for this. Let us first create a collection with documents −> db.summingSubDocumentDemo.insertOne( ... { "_id" :101, "CustomerDetails" : { "CustomerPurchase" : { "CustomerPurchaseAmount" : 2000 } } }); { "acknowledged" : true, "insertedId" : 101 } > db.summingSubDocumentDemo.insertOne( { "_id" :102, "CustomerDetails" : { ... Read More

This example demonstrate about How to create an Android notification with a longer textStep 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 use $avg operator along with aggregate framework. Let us first create a collection with documents −> db.averageOfRatingsInArrayDemo.insertOne( ...   { ...      "StudentDetails":[ ...         { ...             "StudentId":1, ...             "StudentScore":45 ... ... Read More

One way to get the name of the underlying database you have connected with is by invoking the getDatabaseProductName() method of the DatabaseMetaData interface. This method returns the name of the underlying database in String format.Therefore, to retrieve the name of your current database using Java code −Retrieve the DatabaseMetaData ... Read More