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A bipartite graph is a graph in which if the graph coloring is possible using two colors i.e.; vertices in a set are colored with the same color. This is a C++ program to Check whether a graph bipartite or not using 2 color algorithm.Functions and pseudocodesBegin 1. Develop function isSafe() to check if the current color assignment is safe for vertex v, i.e. checks whether the edge exists or not. If it exists, then next check whether the color to be filled in the new vertex is already used ... Read More
You can use aggregate framework along with $month projection operator. Let us first create a collection with documents −> db.specificMonthDemo.insertOne({"StudentName":"Larry", "StudentDateOfBirth":new ISODate('1995-01-12')}); { "acknowledged" : true, "insertedId" : ObjectId("5cb9a9ca8f1d1b97daf71819") } > db.specificMonthDemo.insertOne({"StudentName":"Chris", "StudentDateOfBirth":new ISODate('1999-12-31')}); { "acknowledged" : true, "insertedId" : ObjectId("5cb9a9db8f1d1b97daf7181a") } > db.specificMonthDemo.insertOne({"StudentName":"David", "StudentDateOfBirth":new ISODate('2000-06-01')}); { "acknowledged" : true, "insertedId" : ObjectId("5cb9a9ee8f1d1b97daf7181b") }Following is the query to display all documents from the collection with the help of find() method −> db.specificMonthDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5cb9a9ca8f1d1b97daf71819"), "StudentName" : "Larry", "StudentDateOfBirth" : ISODate("1995-01-12T00:00:00Z") } { "_id" ... Read More
Google Drive Filestream is launched by Google to allow you to quickly access all your files on google drive directly from the computer. It does not use your hard drive space !!It is a new desktop application created for the G-suite users which takes far less time to access the files, than the Google drive.The path to access the files is Apps > G Suite > Drive and Docs > Data Access.
The equality of two durations can be determined using the equals() method in the Duration class in Java. This method requires a single parameter i.e. the duration to be compared. Also, it returns true if both the durations are equal and false otherwise.A program that demonstrates this is given as follows −Example Live Demoimport java.time.Duration; public class GFG { public static void main(String[] args) { Duration d1 = Duration.ofDays(1); Duration d2 = Duration.ofHours(24); boolean flag = d1.equals(d2); ... Read More
The contain() method is used to search a value in Septet class.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 −Exampleimport org.javatuples.Septet; public class Demo { public static void main(String[] args) { Septet ... Read More
To exclude entries with “0”, you need to use NULLIF() with function AVG().The syntax is as followsSELECT AVG(NULLIF(yourColumnName, 0)) AS anyAliasName FROM yourTableName;Let us first create a tablemysql> create table AverageDemo - > ( - > Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, - > StudentName varchar(20), - > StudentMarks int - > ); Query OK, 0 rows affected (0.72 sec)Insert some records in the table using insert command.The query is as followsmysql> insert into AverageDemo(StudentName, StudentMarks) values('Adam', NULL); Query OK, 1 row affected (0.12 sec) mysql> insert into AverageDemo(StudentName, StudentMarks) values('Larry', 23); Query OK, ... Read More
Page redirection is generally used when a document moves to a new location and we need to send the client to this new location. This can be because of load balancing, or for simple randomization.The simplest way of redirecting a request to another page is by using sendRedirect() method of response object. Following is the signature of this method −public void response.sendRedirect(String location) throws IOExceptionThis method sends back the response to the browser along with the status code and new page location. You can also use the setStatus() and the setHeader() methods together to achieve the same redirection example −.... ... Read More
The string value of the MonthDay object can be obtained using the method toString() in the MonthDay class in Java. This method requires no parameters and it returns the string value of the MonthDay object.A program that demonstrates this is given as follows −Example Live Demoimport java.time.*; public class Demo { public static void main(String[] args) { MonthDay md = MonthDay.parse("--02-22"); System.out.println("The MonthDay is: " + md.toString()); } }OutputThe MonthDay is: --02-22Now let us understand the above program.The string value of the MonthDay ... Read More
The build() method of the LongStream.Builder class builds the stream, transitioning this builder to the built state.The syntax is as followsLongStream build()To use the LongStream.Builder class in Java, import the following packageimport java.util.stream.LongStream;The following is an example to implement LongStream.Builder build() method in JavaExample Live Demoimport java.util.stream.LongStream; public class Demo { public static void main(String[] args) { LongStream.Builder builder = LongStream.builder(); builder.accept(255L); builder.accept(570L); builder.accept(355L); builder.accept(155L); ... Read More
You can use $set operator for this. The syntax is as follows −db.yourCollectionName.update({}, { $set : {"yourFieldName": [] }} , {multi:true} );To understand the above syntax, let us create a collection with the document. The query to create a collection with a document is as follows −> db.deleteAllElementsInArrayDemo.insertOne({"InstructorName":"Larry", "InstructorTechnicalSubject":["Java", "MongoDB"]}); { "acknowledged" : true, "insertedId" : ObjectId("5c8fb971d3c9d04998abf00e") } > db.deleteAllElementsInArrayDemo.insertOne({"InstructorName":"Mike", "InstructorTechnicalSubject":["C", "C++", "Python"]}); { "acknowledged" : true, "insertedId" : ObjectId("5c8fb98ad3c9d04998abf00f") }Display all documents from a collection with the help of find() method. The query is as follows −> db.deleteAllElementsInArrayDemo.find().pretty();The following is the output −{ "_id" ... Read More