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At first, let us create and array of strings:String[] strArr = { "ABCD", "AB", "ABCDEFG", "ABC", "A", "ABCDE", "ABCDEF", "ABCDEFGHIJ" }Now, for longest to shortest pattern, for example ABCDEFGHIJ, ABCDEFG, ABCDEF, etc.; get the length of both the string arrays and work them like this:Arrays.sort(strArr, (str1, str2) → str2.length() - str1.length());The following is an example to sort array of strings by their lengths with longest to shortest pattern in Java:Exampleimport java.util.Arrays; public class Demo { public static void main(String[] args) { String[] strArr = { "ABCD", "AB", "ABCDEFG", "ABC", "A", "ABCDE", "ABCDEF", "ABCDEFGHIJ" }; ... Read More
Now let us see a program of Intel 8085 Microprocessor. In this program we will see how to do different operations based on choice.Problem Statement:Write 8085 Assembly language program to perform some operations on two 8-bit binary numbers base on choice.Discussion:In this program we are taking a choice. The choice value is stored at memory location 8000H (named as X). And the numbers are stored at location 8001H and 8002H. We are storing the result at location 8050H and 8051H.Here if the choice is 00H, then it will perform addition, for 01H, it will perform subtraction, and for 02H, it ... Read More
To get a random record from MongoDB, you can use aggregate function. The syntax is as follows:db.yourCollectionName.aggregate([{$sample:{size:1}}]);To understand the above syntax, let us create a collection with some documents. The query to create collection is as follows:>db.employeeInformation.insert({"EmployeeId":1, "EmployeeName":"Maxwell", "EmployeeAge":26}); WriteResult({ "nInserted" : 1 }) >db.employeeInformation.insert({"EmployeeId":2, "EmployeeName":"David", "EmployeeAge":25}); WriteResult({ "nInserted" : 1 }) >db.employeeInformation.insert({"EmployeeId":3, "EmployeeName":"Carol", "EmployeeAge":24}); WriteResult({ "nInserted" : 1 }) >db.employeeInformation.insert({"EmployeeId":4, "EmployeeName":"Bob", "EmployeeAge":28}); WriteResult({ "nInserted" : 1 }) >db.employeeInformation.insert({"EmployeeId":5, "EmployeeName":"Sam", "EmployeeAge":27); WriteResult({ "nInserted" : 1 })Now you can display all documents from a collection with the help of find() method. The query is as follows:> db.employeeInformation.find().pretty();The following is the output:{ ... Read More
This example demonstrate about How to find edit text values start from consonant or not.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 edit text and button view to verify edit text data is starting with a consonant.Step 3− Add the following code to java/MainActivity.xmlpackage com.example.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends AppCompatActivity ... Read More
The noneMatch() method of the LongStream class in Java returns whether no elements of this stream match the provided predicate.The syntax is as followsboolean noneMatch(LongPredicate predicate)Here, the parameter predicate is a stateless predicate to apply to elements of this stream. However, LongPredicate in the syntax represents a predicate (boolean-valued function) of one long-valued argument.To use the LongStream class in Java, import the following packageimport java.util.stream.LongStream;The method returns true if either no elements of the stream match the provided predicate or the stream is empty. The following is an example to implement LongStream noneMatch() method in JavaExample Live Demoimport java.util.stream.LongStream; public class ... Read More
The distinct() method in the LongStream class returns a stream consisting of the distinct elements of this stream.The syntax is as follows.LongStream distinct()To use the LongStream class in Java, import the following package.import java.util.stream.LongStream;Create a LongStream and add elements.LongStream longStream = LongStream.of(100L, 150L, 100L, 300L, 150L, 500L);Now, get the distinct elements.longStream.distinct().The following is an example to implement LongStream distinct() method in Java. Here, we have repeated elements in the stream.Example Live Demoimport java.util.stream.LongStream; public class Demo { public static void main(String[] args) { LongStream longStream = LongStream.of(100L, 150L, 100L, 300L, 150L, 500L); System.out.println("Distinct elements..."); ... Read More
To find a document with Objectid in MongoDB, use the following syntax −db.yourCollectionName.find({"_id":ObjectId("yourObjectIdValue")}).pretty();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.findDocumentWithObjectIdDemo.insertOne({"UserName":"Larry"}); { "acknowledged" : true, "insertedId" : ObjectId("5c90e4384afe5c1d2279d69b") } > db.findDocumentWithObjectIdDemo.insertOne({"UserName":"Mike", "UserAge":23}); { "acknowledged" : true, "insertedId" : ObjectId("5c90e4444afe5c1d2279d69c") } > db.findDocumentWithObjectIdDemo.insertOne({"UserName":"Carol", "UserAge":26, "UserHobby":["Learning", "Photography"]}); { "acknowledged" : true, "insertedId" : ObjectId("5c90e4704afe5c1d2279d69d") }Display all documents from a collection with the help of find() method. The query is as follows −> db.findDocumentWithObjectIdDemo.find().pretty();The following is the output ... Read More
The contains() method of the AbstractCollection class checks whether an element is in the AbstractCollection or not. It returns a Boolean i.e. TRUE if the element is in the collection, else FALSE is returned.The syntax is as follows:public boolean contains(Object ele)Here, ele is the element to be checked for existence.To work with AbstractCollection class in Java, import the following package:import java.util.AbstractCollection;The following is an example to implement AbstractCollection contains() method in Java:Example Live Demoimport java.util.ArrayList; import java.util.AbstractCollection; public class Demo { public static void main(String[] args) { AbstractCollection absCollection = new ArrayList(); absCollection.add("Football"); ... Read More
To set a query for not equal to null or empty, use the $nin operator. The syntax is as followsdb.yourCollectionName.find({yourFieldName:{$nin:[null, ""]}});Let us create a collection with documents> db.notEqualToNullOrEmptyDemo.insertOne({"UserName":"Larry", "UserAge":24}); { "acknowledged" : true, "insertedId" : ObjectId("5c9d20b6a629b87623db1b26") } > db.notEqualToNullOrEmptyDemo.insertOne({"UserName":"", "UserAge":29}); { "acknowledged" : true, "insertedId" : ObjectId("5c9d20bea629b87623db1b27") } > db.notEqualToNullOrEmptyDemo.insertOne({"UserName":"Sam", "UserAge":32}); { "acknowledged" : true, "insertedId" : ObjectId("5c9d20c7a629b87623db1b28") } > db.notEqualToNullOrEmptyDemo.insertOne({"UserName":null, "UserAge":27}); { "acknowledged" : true, "insertedId" : ObjectId("5c9d20d2a629b87623db1b29") } > db.notEqualToNullOrEmptyDemo.insertOne({"UserName":"Robert", "UserAge":26}); { "acknowledged" : true, "insertedId" : ObjectId("5c9d20dda629b87623db1b2a") } > db.notEqualToNullOrEmptyDemo.insertOne({"UserName":"", "UserAge":23}); { "acknowledged" : true, ... Read More
To perform complex MySQL insert, you can use CONCAT() function. Let us see an example and create a table with StudentId and StudentFirstName.After that, complex MySQL insert will be performed and 'Web Student’ text will get inserted for every value and unique StudentId will get concatenated.The query to create first table is as follows −mysql> create table DemoTable ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentFirstName varchar(20) ); Query OK, 0 rows affected (0.55 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(StudentFirstName) values('John'); Query OK, 1 row affected (0.16 sec) mysql> insert ... Read More