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Assume we already have a table named MyData in the database with the following description.+---------+--------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +---------+--------------+------+-----+---------+-------+ | Name | varchar(255) | YES | | NULL | | | Article | longtext | YES | | NULL | | +---------+--------------+------+-----+---------+-------+If you need to insert ... Read More
The contains() method of AbstractSequentialList in Java is used to check whether an element is in the Collection.The syntax is as followspublic boolean contains(Object ob)Here, ob is the element to be checked. To work with the AbstractSequentialList class in Java, you need to import the following packageimport java.util.AbstractSequentialList;The following is an example to implement AbstractSequentialList contains() method in JavaExample Live Demoimport java.util.LinkedList; import java.util.AbstractSequentialList; public class Demo { public static void main(String[] args) { AbstractSequentialList absSequential = new LinkedList(); absSequential.add(250); ... Read More
Image recognition used to be done using much simpler methods such as linear regression and comparison of similarities. The results were obviously not very good, even the simple task of recognizing hand-written alphabets proved difficult. Convolution neural networks (CNNs) are supposed to be a step up from what we traditionally do by offering a computationally cheap method of loosely simulating the neural activities of a human brain when it perceives images.Convolutional neural network overviewVery similar to how we recognise different objects, computer algorithms need to go through millions of images before it is able to generalize the input and make ... Read More
The argc stands for argument count and argv stands for argument values. These are variables passed to main function when it starts executing. When we run a program we can give arguments to that program like:$ ./a.out helloHere hello is an argument to the executable. This can be accessed in your program.Example Code#include using namespace std; int main(int argc, char** argv) { cout
To insert a specific index for MongoDB array, you can use $push operator. Let us create a collection with documents>db.insertToSpecificIndexDemo.insertOne({"StudentName":"Larry", "StudentSubjects":["MySQL", "Java"]}); { "acknowledged" : true, "insertedId" : ObjectId("5c9d2562a629b87623db1b2c") } >db.insertToSpecificIndexDemo.insertOne({"StudentName":"Chris", "StudentSubjects":["C++", "C"]}); { "acknowledged" : true, "insertedId" : ObjectId("5c9d2573a629b87623db1b2d") }Following is the query to display all documents from a collection with the help of find() method> db.insertToSpecificIndexDemo.find().pretty();This will produce the following output{ "_id" : ObjectId("5c9d2562a629b87623db1b2c"), "StudentName" : "Larry", "StudentSubjects" : [ "MySQL", "Java" ] } { "_id" : ObjectId("5c9d2573a629b87623db1b2d"), "StudentName" : "Chris", ... Read More
You can use stored procedure to insert into two tables in a single query. Let us first create a table −mysql> create table DemoTable ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentFirstName varchar(20) ); Query OK, 0 rows affected (0.56 sec)Here is the query to create second table −mysql> create table DemoTable2 ( ClientId int NOT NULL AUTO_INCREMENT PRIMARY KEY, ClientName varchar(20), ClientAge int ); Query OK, 0 rows affected (0.76 sec)Following is the query to create stored procedure to insert into two tables created above −mysql> DELIMITER // mysql> CREATE PROCEDURE insert_into_twoTables(name ... Read More
First, create a List with String elements:List myList = new ArrayList(); myList.add("pqr"); myList.add("stu"); myList.add("vwx"); myList.add("yza"); myList.add("bcd"); myList.add("efg"); myList.add("vwxy");Use the startsWith() method to check if any of the above string in the myList begins with a specific letter:myList.stream().anyMatch((a) -> a.startsWith("v"));TRUE is returned if any of the string begins with the specific letter, else FALSE.The following is an example to check if any String in the list starts with a letter:Exampleimport java.util.ArrayList; import java.util.List; public class Demo { public static void main(final String[] args) { List myList = new ArrayList(); myList.add("pqr"); myList.add("stu"); ... Read More
A read-only byte buffer can be created using the contents of a buffer with the method asReadOnlyBuffer() in the class java.nio.ByteBuffer. The new buffer cannot have any modifications as it is a read-only buffer. However, the capacity, positions, limits etc. of the new buffer are the same as the previous buffer.A program that demonstrates this is given as follows −Example Live Demoimport java.nio.*; import java.util.*; public class Demo { public static void main(String[] args) { int n = 5; try { ByteBuffer buffer = ByteBuffer.allocate(5); ... Read More
The addAtX() method is used to add value to the Septet Tuple. The index can be set here with the X i.e. the place where the value gets added.Let us first see what we need to work with JavaTuples. To work with Septet class in JavaTuples, you need to import the following package −import org.javatuples.Septet;Note − Steps to download and run JavaTuples program. If you are using Eclipse IDE to run Septet Class in JavaTuples, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file.The following is an example ... Read More
Following table lists out the nine Implicit Objects that JSP supports −Sr.No.Object & Description1requestThis is the HttpServletRequest object associated with the request.2responseThis is the HttpServletResponse object associated with the response to the client.3outThis is the PrintWriter object used to send output to the client.4sessionThis is the HttpSession object associated with the request.5applicationThis is the ServletContext object associated with the application context.6configThis is the ServletConfig object associated with the page.7pageContextThis encapsulates use of server-specific features like higher performance JspWriters.8pageThis is simply a synonym for this, and is used to call the methods defined by the translated servlet class.9ExceptionThe Exception object allows ... Read More