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In general a catalog is a directory which holds information about data sets, file or, a database. Whereas, in a database, catalog holds the list of all the databases, base tables, views (virtual tables), synonyms, value ranges, indexes, users, and user groups.The getCatalogName() method of the ResultSetMetaData (interface) retrieves the name of the catalog of the table containing a particular column.This method accepts an integer value representing the index of the column in the current ResultSet object, as an argument and, returns a String value representing the name of the catalog.To get the ResultSetMetaData object, you need to −Register the Driver: Select the ... Read More
For MongoDB multidimensional array projection, you need to use aggregate framework. Let us first create a collection with documents. Here, we have multidimensional array for Student marks −> db.multiDimensionalArrayProjection.insertOne( ... { ... "StudentFirstName" : "Chris", ... "StudentMarks" : [ [98, 99], [56, 79] ] ... } ... ); { "acknowledged" : true, "insertedId" : ObjectId("5cc6b75a9cb58ca2b005e66c") }Following is the query to display all documents from a collection with the help of find() method −> db.multiDimensionalArrayProjection.find().pretty();This will produce the following output −{ "_id" : ObjectId("5cc6b75a9cb58ca2b005e66c"), "StudentFirstName" : "Chris", "StudentMarks" ... Read More
We have set a component first −GridBagConstraints constraints = new GridBagConstraints(); constraints.gridy = 0; panel.add(new JButton("First row"), constraints);Now, we will place it next to the previously added component −constraints.gridx = GridBagConstraints.RELATIVE; constraints.gridy = 1; panel.add(new JButton("2nd row 1st column"), constraints); panel.add(new JButton("2nd row 2nd column"), constraints);Examplepackage my; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel panel = new JPanel(); panel.setLayout(new GridBagLayout()); GridBagConstraints constraints = new ... Read More
The cite attribute of the element sets a URL to the HTML document and states why a specific text was deleted. Following is the syntax −Here, url is the link that displays the address of the document wherein it is specified why the text was deleted. Let us now see an example to implement the cite attribute of the element −Example Live Demo Subjects to Learn JavaScript A scripting language. Java It is a programming language. jQuery A JavaScript library. C# Object-oriented programming language. Internal Exams from 3rd May ... Read More
The C++ language is designed by adding some additional features like Object Oriented concepts with C. Most of the C programs can be compiled using C++ compiler also. Though there are some programs that cannot be compiled using C++ compiler.Let us see some code, that will compile in C compiler, but not in C++ compilers.In this program there will be one compilation error for C++ code. Because it is trying to call a function that is not declared before. But in C it may compileLive Demo For C.Example Live Demo#include int main() { myFunction(); // myFunction() is called before its ... Read More
An interface in Java is a specification of method prototypes. Whenever you need to guide the programmer or, make a contract specifying how the methods and fields of a type should be you can define an interface.In Java 7As of Java7 you can have only public, abstract as modifiers for the methods of an interface.interface MyInterface{ public abstract void display(); public abstract void setName(String name); public abstract void setAge(int age); }Using any other modifier with the methods of an interface would lead to a compile time error.From Java8From Java8 onwards interfaces ... Read More
The HTML DOM FileUpload disabled property returns and modify the value of disabled attribute of a FileUpload input type in HTML.SyntaxFollowing is the syntax −1. Returning disabledobject.disabled2. Setting disabledobject.disabled = true|false;ExampleLet us see an example of HTML FileUpload disabled property − Live Demo body{ background-color:#397367; color:#fff; padding:10px; } p{ font-size:1.2rem; } input{ width:200px; border:none; margin:10px 0; } .btn{ display:block; margin:10px 0; ... Read More
The HTML DOM Input Email defaultValue property sets/returns the default value corresponding to Email Input. The value attribute changes as the user types in the email input but default value does not change.SyntaxFollowing is the syntax −Returning string valueinputEmailObject.defaultValueSetting defaultValue to stringinputEmailObject.defaultValue = ‘string’ExampleLet us see an example of Input Email defaultValue property − Live Demo Input Email defaultValue form { width:70%; margin: 0 auto; text-align: center; } * { padding: 2px; margin:5px; } input[type="button"] { ... Read More
Input number of elements user want to enters and than input the total value user want to calculate from the given list of elements.Input : N=5 Enter any 5 values : 3 1 6 5 7 Enter sum you want to check : 10 Output : 3 1 6AlgorithmSTART STEP1-> Take values from the user STEP2-> Take the sum a user want to check in the set. STEP3-> For i = 0; i < n; i++ STEP4-> Check If sum - *(ptr+i) >= 0 then, STEP4.1-> sum -= *(ptr+i); STEP4.2-> Print the value of *(ptr+i) END ... Read More
You can use $lt operator for this. Let us create a collection with documents −> db.beforeSpecifyDateDemo.insertOne({"UserLoginDate":new ISODate('2016-03-21')}); { "acknowledged" : true, "insertedId" : ObjectId("5cbd91e4de8cc557214c0e0d") } > db.beforeSpecifyDateDemo.insertOne({"UserLoginDate":new ISODate('2016-05-11')}); { "acknowledged" : true, "insertedId" : ObjectId("5cbd91ecde8cc557214c0e0e") } > db.beforeSpecifyDateDemo.insertOne({"UserLoginDate":new ISODate('2017-01-31')}); { "acknowledged" : true, "insertedId" : ObjectId("5cbd91f9de8cc557214c0e0f") } > db.beforeSpecifyDateDemo.insertOne({"UserLoginDate":new ISODate('2018-05-15')}); { "acknowledged" : true, "insertedId" : ObjectId("5cbd9206de8cc557214c0e10") } > db.beforeSpecifyDateDemo.insertOne({"UserLoginDate":new ISODate('2019-04-01')}); { "acknowledged" : true, "insertedId" : ObjectId("5cbd9211de8cc557214c0e11") }Display all documents from a collection with the help of find() method. The query is as follows −> db.beforeSpecifyDateDemo.find().pretty();This will produce the ... Read More