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Here we will see how we can check number of set bits in an integer number. The set bits are 1’s in the binary representation of a number. For an example the number 13 has three set bits 1101. So the count will be 3.To solve this problem, we will shift the number to the right, and if the LSb is 1, then increase count. Until the number becomes 0, it will run.AlgorithmcountSetBit()begin count := 0 while count is not 0, do if LSb of n is set, then count := ... Read More
In C++, when classes are created, we can copy it using some copy constructor or assignment operator. In this section we will see, how to prevent object copy of a class in C++. To prevent object copy, we can follow some rules. These are like below.1. Creating private copy constructor and private assignment operator.Example#include using namespace std; class MyClass { int x; public: MyClass() { //non-parameterized constructor } MyClass(int y): x(y) { } private: MyClass(const MyClass& obj) ... Read More
Here we will see how to compare two floating point data or two double data using C or C++. The floating point / double comparison is not similar to the integer comparison.To compare two floating point or double values, we have to consider the precision in to the comparison. For example, if two numbers are 3.1428 and 3.1415, then they are same up to the precision 0.01, but after that, like 0.001 they are not same.To compare using this criteria, we will find the absolute value after subtracting one floating point number from another, then check whether the result is ... Read More
The setClientInfo() method of the Connection interface sets values to the client info properties of the current connection object.ParametersThis method accepts a Properties object as a parameter.con.setClientInfo(properties);To set values to the client info properties file.Register the driver using the registerDriver() method of the DriverManager class as −//Registering the Driver DriverManager.registerDriver(new com.mysql.jdbc.Driver());Get the connection using the getConnection() method of the DriverManager class as −//Getting the connection String url = "jdbc:mysql://localhost/mydatabase"; Connection con = DriverManager.getConnection(url, "root", "password");Create a properties object as −Properties properties = new Properties();Add the required key-value pairs to the above created Properties object as −properties.put("user_name", "new_user"); properties.put("password", "password");Set the above created ... Read More
Use the $pull operator to pull array element from a collection. Let us first create a collection with documents −> db.pullElementFromAnArrayDemo.insertOne( ... { ... "StudentScores":[89, 56, 78, 90] ... } ... ); { "acknowledged" : true, "insertedId" : ObjectId("5cd0104a588d4a6447b2e063") }Following is the query to display all documents from a collection with the help of find() method −> db.pullElementFromAnArrayDemo.find();This will produce the following output −{ "_id" : ObjectId("5cd0104a588d4a6447b2e063"), "StudentScores" : [ 89, 56, 78, 90 ] }Following is the query to pull array element from a collection. Here, we are removing element 78 −> ... Read More
To highlight multiple rows in a table, you can use the addRowSelectionInterval() method. At first create a table −DefaultTableModel tableModel = new DefaultTableModel(); JTable table = new JTable(tableModel);Add some columns −tableModel.addColumn("Language/ Technology"); tableModel.addColumn("Text Tutorial"); tableModel.addColumn("Video Tutorial"); tableModel.addColumn("Views");Now, add rows to the table −tableModel.addRow(new Object[] { "NodeJS", "No", "Yes", "2350"}); tableModel.addRow(new Object[] { "MVC", "Yes", "No", "1500"}); tableModel.addRow(new Object[] { "ASP.NET", "Yes", "Yes", "3400"}); tableModel.addRow(new Object[] { "F#", "Yes", "No", "7890"}); tableModel.addRow(new Object[] { "Blockchain", "Yes", "No", "10600"}); tableModel.addRow(new Object[] { "SharePoint", "Yes", "Yes", "4900"});Highlight multiple rows by adding interval of rows from both ends. Set interval (index) for both the ... Read More
Matching two dates in PHP is quite smooth when both the dates are in a similar format but php failed to analyze when the two dates are in an unrelated format. In this article, we will discuss different cases of date comparison in PHP. We will figure out how to utilize DateTime class, strtotime() in comparing dates.Case 1:we can analyze the dates by simple comparison operator if the given dates are in a similar format.Output:2019-03-26 is latest than 2018-11-24Explanation:Here we have declared two dates $date1 and $date2 in the same format. So we have used a comparison operator(>) to compare ... Read More
Let us first create a collection with documents −> db.findOneWorkingDemo.insertOne({"ClientId":1, "ClientName":"Larry", "ClientAge":26}); { "acknowledged" : true, "insertedId" : ObjectId("5cd7c1716d78f205348bc64d") } > db.findOneWorkingDemo.insertOne({"ClientId":2, "ClientName":"Chris", "ClientAge":28}); { "acknowledged" : true, "insertedId" : ObjectId("5cd7c17d6d78f205348bc64e") } > db.findOneWorkingDemo.insertOne({"ClientId":3, "ClientName":"Robert", "ClientAge":34}); { "acknowledged" : true, "insertedId" : ObjectId("5cd7c1896d78f205348bc64f") }Following is the query to display all documents from a collection with the help of find() method −> db.findOneWorkingDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5cd7c1716d78f205348bc64d"), "ClientId" : 1, "ClientName" : "Larry", "ClientAge" : 26 } { "_id" : ObjectId("5cd7c17d6d78f205348bc64e"), "ClientId" : 2, ... Read More
In this article, we will learn about how to implement iterators and their effective implementation in Python 3.x. Or earlier. Let’ s take a look at various methods available in python which implements iterators.Type 1 − Implementation Of While Loop With Known LengthExample Code Live Demogenre = ("Python", "C", "C++", "Java") print("The topic available on Tutorial's Point are:") i = 0 while (i < len(genre)): print (genre[i]) i += 1ExplanationDue to its less compact structure, this method is not favored. Error Handling is also difficult in this case . Large-scale programs or designs doesn’t use ... Read More
Let’s say the following is our int array elements:10, 50, 100, 200, 250, 300, 400, 500Here, we are mapping and creating a new value by incrementing each int element with 1:Arrays.stream(new int[] {10, 50, 100, 200, 250, 300, 400, 500}).map(val -> val + 1)Now find the average:Arrays.stream(new int[] {10, 50, 100, 200, 250, 300, 400, 500}).map(val -> val + 1).average()The following is an example to Map and create new value from int array:Exampleimport java.util.Arrays; public class Demo { public static void main(String[] args) throws Exception { Arrays.stream(new int[] {10, 50, 100, 200, 250, 300, 400, 500}).map(val -> val + 1).average() .ifPresent(System.out::println); } }Output227.25