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The HTML DOM Input Email type property returns/sets type of Input Email.SyntaxFollowing is the syntax −Returning string valueinputEmailObject.typeSetting type to string valueinputEmailObject.type = stringValueString ValuesHere, “stringValue” can be the following −stringValueDetailsemailIt defines that input type is emaildatetime-localIt defines that input type is datetime-localradioIt defines that input type is radiotelIt defines that input type is tel and a number keypad is shown for inputExampleLet us see an example of Input Email type property − Live Demo Input Email type form { width:70%; margin: 0 auto; text-align: center; } ... Read More
To store string array in JList, at first create String array list:String sports[]= { "Football", "Fencing", "Cricket", "Squash", "Hockey", "Rugby"};Now, set it to JList:JList list = new JList(sports);The following is an example to store string array in JList:Examplepackage my; import java.awt.event.*; import java.awt.*; import javax.swing.*; class SwingDemo extends JFrame { static JFrame frame; static JList list; public static void main(String[] args) { frame = new JFrame("JList Demo"); SwingDemo s = new SwingDemo(); JPanel panel = new JPanel(); String sports[]= {"Football", "Fencing", "Cricket", "Squash", "Hockey", "Rugby"}; ... Read More
Here we will see how to convert Little endian value to Big endian or big endian value to little endian in C++. Before going to the actual discussion, we will see what is the big endian and the little endian?In different architectures, the multi-byte data can be stored in two different ways. Sometimes the higher order bytes are stored first, in that case these are known as big endian, and sometimes the lower order bytes are stored first, then it is called little endian.For example, if the number is 0x9876543210, then the big endian will be −The little endian will ... Read More
You can use aggregate framework for this. Let us first create a collection with documents −>db.exactPositionDemo.insertOne({"StudentName":"John", "StudentScores":[78, 98, 56, 45, 89]}); { "acknowledged" : true, "insertedId" : ObjectId("5cd29a1c345990cee87fd883") }Following is the query to display all documents from a collection with the help of find() method −> db.exactPositionDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5cd29a1c345990cee87fd883"), "StudentName" : "John", "StudentScores" : [ 78, 98, 56, 45, 89 ] }Case 1 − Query to aggregate a $slice to get an ... Read More
For this, set the layout orientation to the following −setLayoutOrientation(JList.VERTICAL_WRAP);The following is an example to display the JList items from top to bottom and left to right −Examplepackage my; import java.awt.BorderLayout; import java.util.ArrayList ; import java.util.List; import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JPanel; import javax.swing.JScrollPane; public class SwingDemo { public static void main(String[] args) { JPanel panel = new JPanel(new BorderLayout()); List myList = new ArrayList(10); for (int index = 0; index < 20; index++) { myList.add("List Item " + index); } ... Read More
Use keyword AS for this. Let us first create a table −mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Name varchar(20) ); Query OK, 0 rows affected (3.16 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Name) values('John'); Query OK, 1 row affected (0.50 sec) mysql> insert into DemoTable(Name) values('Robert'); Query OK, 1 row affected (0.29 sec) mysql> insert into DemoTable(Name) values('David'); Query OK, 1 row affected (0.54 sec)Display all records from the table using select statement −mysql> select *from DemoTable;Output+----+--------+ | Id | Name | ... Read More
It is basically pointless to check for a NULL pointer before deleting. Deleting a pointer will do nothing if the pointer set to NULL. It might be the reason to check for the NULL pointer that deleting a pointer which is already set to NULL may indicate bugs in the program.
A complex number is created from real numbers. Python complex number can be created either using direct assignment statement or by using complex () function.Complex numbers which are mostly used where we are using two real numbers. For instance, an electric circuit which is defined by voltage(V) and current(C) are used in geometry, scientific calculations and calculus.Syntaxcomplex([real[, imag]])Creating a simple complex number in python>>> c = 3 +6j >>> print(type(c)) >>> print(c) (3+6j) >>> >>> c1 = complex(3, 6) >>> print(type(c1)) >>> print(c1) (3+6j)From above results, we can see python complex numbers are of type complex. Each complex ... Read More
The commit() method of the Connection interface saves all the modifications made since the last commit.con.save()If any issue occurs after the commit you can revert all the changes done till this commit by invoking the rollback() method.Con.rollback()To commit a transactionRegister 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");Turn off the auto-commit using the setAutoCommit() method as −//Setting the auto commit false con.setAutoCommit(false);Commit the transaction using the commit() method as −con.commit();Let us create a table with ... Read More
You can use dot(.) notation along with array index to get record beginning with specific element. Let us first create a collection with documents −>db.arrayStartsWithElementDemo.insertOne({"PlayerName":"Chris", "PlayerScore":[780, 9000, 456, 789, 987]}); { "acknowledged" : true, "insertedId" : ObjectId("5cd29fed345990cee87fd889") } >db.arrayStartsWithElementDemo.insertOne({"PlayerName":"Robert", "PlayerScore":[890, 670, 890, 54646, 42424]}); { "acknowledged" : true, "insertedId" : ObjectId("5cd2a00c345990cee87fd88a") } >db.arrayStartsWithElementDemo.insertOne({"PlayerName":"David", "PlayerScore":[909090, 896555, 3344433, 78900]}); { "acknowledged" : true, "insertedId" : ObjectId("5cd2a025345990cee87fd88b") }Following is the query to display all documents from a collection with the help of find() method −> db.arrayStartsWithElementDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5cd29fed345990cee87fd889"), ... Read More