In this section we will see what is the conversion constructor or converting constructor in C++ class. A constructor is a special type of function of class. It has some unique property like, its name will be same as class name, it will not return any value etc. The constructors are used to construct objects of a class. Sometimes constructors may take some arguments, or sometimes it does not take arguments.When a constructor takes only one argument then this type of constructors becomes conversion constructor. This type of constructor allows automatic conversion to the class being constructed.Example#include using namespace std; ... Read More

Yes, you need to use AND or OR operator. The syntax is as follows −select *from yourTableName where yourColumnName1=yourValue AND yourColumnName=yourValue';For AND condition, both conditions must be true otherwise you will get an empty set.To understand the above syntax, let us create a table. The query to create a table is as follows −mysql> create table WhereDemo -> ( -> Id int, -> Name varchar(20) -> ); Query OK, 0 rows affected (0.56 sec)Now you can insert some records in the table using insert command. The query is ... Read More

PC is a 16-bit register. It contains a memory address. PC contains that very memory address from where the next instruction is to be fetched for execution. Suppose the PC contents are 8000H, then it means that the 8085 Desires to fetch the instruction Byte at 8000H. After fetching the Byte at 8000H, the PC is automatically incremented by 1. This way 8085 becomes ready to fetch the next Byte of the instruction (in case instruction fetch is incomplete), or fetch the next opcode (in case instruction fetch is over).So in this example, first of all PC is loaded with ... Read More

This example demonstrates about Android Determine App Starts First Time OR Not Programmatically.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. In the above code, we have taken textview, when user open application, it will check whether it is the first time or not. If first time, it will append first-time text to textview or else it shows more than first-time text.Step 3 − Add the following code to src/MainActivity.javapackage ... Read More

Use the fromCollection() method to create Quartet Tuple from List. Let us first see what we need Let us first see what we need to work with JavaTuples. To work with JavaTuples. Let us first see what we need to work with JavaTuples. To work with Quartet class in JavaTuples, you need to import the following package −import org.javatuples.Quartet;Note − Steps to download and run JavaTuples program If you are using Eclipse IDE to run Quartet Class in JavaTuples, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file.The ... Read More

Following table lists out the other advantages of using JSP over other technologies −vs. Active Server Pages (ASP)The advantages of JSP are twofold. First, the dynamic part is written in Java, not Visual Basic or other MS specific language, so it is more powerful and easier to use. Second, it is portable to other operating systems and non-Microsoft Web servers.vs. Pure ServletsIt is more convenient to write (and to modify!) regular HTML than to have plenty of println statements that generate the HTML.vs. Server-Side Includes (SSI)SSI is really only intended for simple inclusions, not for "real" programs that use form ... Read More

An immutable copy of a LocalDate where the required duration is added to it can be obtained using the plus() method in the LocalDate class in Java. This method requires two parameters i.e. the duration to be added and the TemporalUnit of the duration. Also, it returns the LocalDate object with the required duration added to it.A program that demonstrates this is given as follows −Example Live Demoimport java.time.*; import java.time.temporal.*; public class Demo { public static void main(String[] args) { LocalDate ld = LocalDate.parse("2019-02-15"); System.out.println("The ... Read More

The averagingInt() method of the Collectors class returns a Collector that produces the arithmetic mean of a int-valued function applied to the input elements.The syntax is as follows −static Collector averagingInt(ToIntFunction

You can use positional operator $ for this. To understand the above concept, let us create a collection with the document. The query to create a collection with a document is as follows −> db.incrementValueInNestedArrayDemo.insertOne(    ... {"UniqueId":1,       ... "StudentDetails":       ... [          ... {             ... "StudentId":101,             ... "StudentMarks":97          ... },          ... {             ... "StudentId":103,             ... "StudentMarks":99     ... Read More

The following is the syntax to order by date field which is not in date formatselect *from yourTableName order by STR_TO_DATE(yourColumnName, '%d/%m/%Y') DESC;To understand the above syntax, let us create a table. The query to create a table is as followsmysql> create table orderByDateFormatDemo    -> (    -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> ArrivalDatetime varchar(100)    -> ); Query OK, 0 rows affected (0.73 sec)Insert some records in the table using insert command. The query is as follows −mysql> insert into orderByDateFormatDemo(ArrivalDatetime) values('01/10/2012'); Query OK, 1 row affected (0.20 sec) mysql> insert into orderByDateFormatDemo(ArrivalDatetime) values('03/11/2010'); ... Read More