Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Python uses a mechanism, which is known as "Call-by-Object", sometimes also called "Call by Object Reference" or "Call by Sharing"If you pass immutable arguments like integers, strings or tuples to a function, the passing acts like Call-by-value. It's different, if we pass mutable arguments.All parameters (arguments) in the Python language are passed by reference. It means if you change what a parameter refers to within a function, the change also reflects back in the calling function.Examplestudent={'Archana':28, 'krishna':25, 'Ramesh':32, 'vineeth':25} def test(student): new={'alok':30, 'Nevadan':28} student.update(new) print("Inside the function", student) return test(student) print("outside the function:", student)OutputInside the function ... Read More
The HTML DOM input hidden name property returns and alter the value of name attribute of input field of type=”hidden” in an HTML document.SyntaxFollowing is the syntax −1. Returning nameobject.name2. modifying nameobject.name=”text”ExampleLet us see an example of HTML DOM input hidden name property − Live Demo body{ text-align:center; background-color:#F19A3E; color:#fff; } .btn{ background-color:#3C787E; border:none; height:2rem; border-radius:50px; width:60%; margin:1rem auto; display:block; color:#fff; ... Read More
Here we will see one interesting Boolean matrix problem. One Boolean matrix is given which contains 0’s and 1’s. Our goal is to find where 1 is marked. If the 1 is marked at position mat[i, j], then we will make all entries to 1 of the row i and column j. Let us see an example. If the matrix is like below −1 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0Then after modification, it will be −1 1 1 1 1 1 0 1 1 1 0 1 1 1 1 1AlgorithmmatrixUpdate(matrix[R, ... Read More
As per the question, the task is to find the nearest prime number by adding the prime number starting from 2 if the number N is not Prime.Input: N=6 Output: 11ExplanationSince 6 is not prime add first prime to 6 i.e. 2 which will result to 8 now 8 is also not prime now add next prime after 2 which is 3 which will give 8+3 = 11. Hence 11 is a prime number output will be 11.AlgorithmSTART Step 1- > declare num=15, i = num/2 Step 2 -> Loop For k=2 and k
In order to convert NumberLong to String in MongoDB, you can use toString() −NumberLong('yourValue').valueOf().toString();To convert NumberLong to String, you can use valueOf() as well −NumberLong('yourValue').valueOf();Let us implement both the above syntaxes.Following is the query to convert NumberLong to String with toString() −> NumberLong('1000').valueOf().toString();This will produce the following output −1000Following is the query to convert NumberLong to Number with valueOf()> NumberLong('1000').valueOf();This will produce the following output −1000
The following is an example to add action listener to Button:Examplepackage my; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class SwingDemo { private JFrame frame; private JLabel headerLabel; private JLabel statusLabel; private JPanel controlPanel; public SwingDemo(){ prepareGUI(); } public static void main(String[] args){ SwingDemo swingControlDemo = new SwingDemo(); swingControlDemo.showButtonDemo(); } private void prepareGUI(){ frame = new JFrame("Java Swing"); frame.setSize(500, 500); frame.setLayout(new GridLayout(3, 1)); frame.addWindowListener(new WindowAdapter() { ... Read More
The supportsSavepoints() method of the DatabaseMetaData interface is used to determine whether the underlying database supports savepoints.This method returns a boolean value which is −True, when the underlying database supports savepoints.False, when the underlying database doesn't support savepoints.To determine whether the underlying database supports save points −Make sure your database is up and running.Register the driver using the registerDriver() method of the DriverManager class. Pass an object of the driver class corresponding to the underlying database.Get the connection object using the getConnection() method of the DriverManager class. Pass the URL the database and, user name, password of a user in the ... Read More
You can concatenate results with the help of forEach(). Let us first create a collection with documents −> db.concatenateDemo.insertOne({"Name":"John", "Age":21}); { "acknowledged" : true, "insertedId" : ObjectId("5cc80dd88f9e6ff3eb0ce448") } > db.concatenateDemo.insertOne({"Name":"Carol", "Age":23}); { "acknowledged" : true, "insertedId" : ObjectId("5cc80de18f9e6ff3eb0ce449") }Following is the query to display all documents from a collection with the help of find() method −> db.concatenateDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5cc80dd88f9e6ff3eb0ce448"), "Name" : "John", "Age" : 21 } { "_id" : ObjectId("5cc80de18f9e6ff3eb0ce449"), "Name" : "Carol", "Age" : 23 }Here is the query to concatenate results ... Read More
We can arrange the characters of a string in different order. Here we will see how we can count the number of permutations can be formed from a given string.We know that if one string is ‘abc’. It has three characters; we can arrange them into 3! = 6 different ways. So a string with n characters, we can arrange them into n! different ways. But now if there are same characters are present for multiple times, like aab, then there will not be 6 permutations.abaaabbaabaaaababaHere the (1, 6), (2, 5), (3, 4) are same. So here the number of ... Read More
To customize how a JTabbedPane looks, change its font style, font face, font size and the background and foreground colors.Let’s say the following is the JTabbedPane −JTabbedPane tabbedPane = new JTabbedPane();Now, let us customize the above created JTabbedPane −tabbedPane.setBackground(Color.orange); tabbedPane.setForeground(Color.white); Font font = new Font("Verdana", Font.CENTER_BASELINE, 18); tabbedPane.setFont(font);The following is an example to customize JTabbedPane −Examplepackage my; import javax.swing.*; import java.awt.*; public class SwingDemo { public static void main(String args[]) { JFrame frame = new JFrame("Technologies"); JTabbedPane tabbedPane = new JTabbedPane(); JPanel panel1, panel2, panel3, panel4, panel5; ... Read More