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Here we will see some program that will return different results if they are compiled in C or C++ compilers. We can find many such programs, but here we are discussing about some of them.In C and C++, the character literals are treated as different manner. In C, they are treated as int but in C++, they are treated as characters. So if we check the size using sizeof() operator, it will return 4 in C, and 1 in C++.Live Demo For C.Example Live Demo#include int main() { printf("The character: %c, size(%d)", 'a', sizeof('a')); }Output(C)The character: a, size(4)Live Demo For ... Read More
Yes, you can.If you implement an interface and provide body to its methods from a class. You can hold object of the that class using the reference variable of the interface i.e. cast an object reference to an interface reference.But, using this you can access the methods of the interface only, if you try to access the methods of the class a compile time error is generated.ExampleIn the following Java example, we have an interface named MyInterface with an abstract method display().We have a class with name InterfaceExample with a method (show()). In addition to it, we are implementing the ... Read More
The HTML DOM Input Email form property returns the reference of enclosing form for input Email.SyntaxFollowing is the syntax −Returning reference to the form objectinputEmailObject.formExampleLet us see an example of Input Email form property − Live Demo Input Email form form { width:70%; margin: 0 auto; text-align: center; } * { padding: 2px; margin:5px; } input[type="button"] { border-radius: 10px; } Email-form Employee Email : ... Read More
Given two sorted arrays and output should display their uncommon elementsGiven : array1[]= {1, 4, 6, 9, 12} array2[]= {2, 4, 7, 8, 9, 10} Output : 1 2 6 7 8 10 12AlgorithmSTART Step 1 -> declare two arrays array1 and array2 with elements as int and variables n1, n2, i to 0 and j to 0 Step 2 -> calculate number of elements in array1 sizeof(array1)/sizeof(array1[0]) Step 3-> calculate number of elements in array2 sizeof(array2)/sizeof(array2[0]) Step 4 -> Loop While till i loop While i < n1 && array1[i]!=array2[j] Print array1[i++] Step 7 -> End Loop ... Read More
Let us create a collection with documents −> db.selectOnlyNumericDemo.insertOne({"UserId":"User101"}); { "acknowledged" : true, "insertedId" : ObjectId("5cbdb711de8cc557214c0e16") } > db.selectOnlyNumericDemo.insertOne({"UserId":"102"}); { "acknowledged" : true, "insertedId" : ObjectId("5cbdb716de8cc557214c0e17") } > db.selectOnlyNumericDemo.insertOne({"UserId":"User103"}); { "acknowledged" : true, "insertedId" : ObjectId("5cbdb71dde8cc557214c0e18") } > db.selectOnlyNumericDemo.insertOne({"UserId":"104"}); { "acknowledged" : true, "insertedId" : ObjectId("5cbdb725de8cc557214c0e19") }Display all documents from a collection with the help of find() method −> db.selectOnlyNumericDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5cbdb711de8cc557214c0e16"), "UserId" : "User101" } { "_id" : ObjectId("5cbdb716de8cc557214c0e17"), "UserId" : "102" } { "_id" : ObjectId("5cbdb71dde8cc557214c0e18"), "UserId" : "User103" } { "_id" : ... Read More
This is a C++ program to implement Treap. Treap data structure is basically a randomized binary search tree. Here, we shall consider insert, delete and search operations on this.Functions and descriptionsfunction rotLeft() for left rotationFirst rotate the tree then set new root.function rotRight() for right rotationFirst rotate the tree then set new root.function insetNod() to insert a given key into treap with priority recursively −If root = nullptr return data as root. If given data is less then root node, Insert data in left subtree. Rotate left if heap property violated. else Insert data in right ... Read More
To remove only a single document, use the remove() in MongoDB. Let us first create a collection with documents −> db.removeOnlyOneDocumentDemo.insertOne({"FirstName":"John", "LastName":"Smith"}); { "acknowledged" : true, "insertedId" : ObjectId("5cc6ca2f9cb58ca2b005e674") } > db.removeOnlyOneDocumentDemo.insertOne({"FirstName":"Carol", "LastName":"Taylor"}); { "acknowledged" : true, "insertedId" : ObjectId("5cc6ca399cb58ca2b005e675") } > db.removeOnlyOneDocumentDemo.insertOne({"FirstName":"David", "LastName":"Miller"}); { "acknowledged" : true, "insertedId" : ObjectId("5cc6ca429cb58ca2b005e676") }Following is the query to display all documents from a collection with the help of find() method −> db.removeOnlyOneDocumentDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5cc6ca2f9cb58ca2b005e674"), "FirstName" : "John", "LastName" : "Smith" } { "_id" : ObjectId("5cc6ca399cb58ca2b005e675"), ... Read More
To create titled border for a panel, use the createTitledBorder() method. Let us create a panel first −JPanel panel = new JPanel(); JButton btn1 = new JButton("One"); JButton btn2 = new JButton("Two"); panel.add(btn1); panel.add(btn2);Now, set titled border with BorderFactory class −panel.setBorder(BorderFactory.createTitledBorder("Title of the border"));The following is an example to create titled border for a panel in Java −Examplepackage my; import java.awt.Component; import java.awt.Dimension; import javax.swing.BorderFactory; import javax.swing.BoxLayout; 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); frame.getContentPane().setLayout(new ... Read More
Enumeration (enum) in Java is a datatype which stores a set of constant values. You can use enumerations to store fixed values such as days in a week, months in a year etc.You can define an enumeration using the keyword enum followed by the name of the enumeration as −enum Days { SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY }Points to keep in mindYou need to keep the following points in mind while declaring an enum −It is recommended to write the name of the constants in all capital letters as −public class EnumerationExample { enum Days { ... Read More
The HTML DOM Input Email maxLength property returns/sets the maxLength property for input Email. If not defined this property returns ‘-1’.SyntaxFollowing is the syntax −Returning maxLength attributeinputEmailObject.maxLengthSet maxLength property to a numberinputEmailObject.maxLength = numberExampleLet us see an example of Input Email maxLength property − Live Demo Input Email maxLength form { width:70%; margin: 0 auto; text-align: center; } * { padding: 2px; margin:5px; } input[type="button"] { border-radius: 10px; } ... Read More