Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
The DoubleStream.generate() method returns an infinite sequential unordered stream where each element is generated by the provided DoubleSupplier.The syntax is as follows −static DoubleStream generate(DoubleSupplier s)Here, s is the DoubleSupplier for generated elements. The DoubleSupplier represents a supplier of double-valued results.To use the DoubleStream class in Java, import the following package −import java.util.stream.DoubleStream;The following is an example to generate Infinite stream of Double in Java with DoubleStream.generate() method −Exampleimport java.util.stream.*; import java.util.*; public class Demo { public static void main(String[] args) { Random r = new Random(); DoubleStream.generate(r::nextDouble).forEach(System.out::println); } }Here is ... Read More
Let us see an example to understand the $toString in MongoDB. 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.objectidToStringDemo.insertOne({"UserName":"John"}); { "acknowledged" : true, "insertedId" : ObjectId("5c92b80036de59bd9de0639d") } > db.objectidToStringDemo.insertOne({"UserName":"Chris"}); { "acknowledged" : true, "insertedId" : ObjectId("5c92b80436de59bd9de0639e") } > db.objectidToStringDemo.insertOne({"UserName":"Larry"}); { "acknowledged" : true, "insertedId" : ObjectId("5c92b80936de59bd9de0639f") } > db.objectidToStringDemo.insertOne({"UserName":"Robert"}); { "acknowledged" : true, "insertedId" : ObjectId("5c92b81836de59bd9de063a0") }Display all documents from a collection with the help of find() method. The query is as follows ... Read More
This example demonstrate about How to use Constraint Layout with recyclerviewStep 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 app bar layout and recycler view.Step 3 − Add the following code to src/MainActivity.java import android.annotation.TargetApi; import android.app.Activity; import android.content.Intent; import android.content.SharedPreferences; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.support.v4.content.pm.ShortcutInfoCompat; import android.support.v4.content.pm.ShortcutManagerCompat; import android.support.v4.graphics.drawable.IconCompat; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.DefaultItemAnimator; ... Read More
Let’s say the following is our List with elements −ArrayList < String > arrList = new ArrayList < String > (); arrList.add("Jack"); arrList.add("Tom"); arrList.add("Brad"); arrList.add("Amy"); arrList.add("Ben"); arrList.add("Peter"); arrList.add("Katie"); arrList.add("Tim");Now, use the listIterator(). The next() method returns the next element in the List. Hoverer, remove an element using remove() method −ListIteratoriterator = arrList.listIterator(); iterator.next(); iterator.remove();Example Live Demoimport java.util.ArrayList; import java.util.ListIterator; public class Demo { public static void main(String[] args) { ArrayListarrList = new ArrayList(); arrList.add("Jack"); arrList.add("Tom"); arrList.add("Brad"); arrList.add("Amy"); arrList.add("Ben"); arrList.add("Peter"); ... Read More
Following is the syntax to GROUP BY in a select query on positive or negative values:select *from yourTableName group by -yourColumnName;Let us first create a table:mysql> create table DemoTable (Value int); Query OK, 0 rows affected (0.60 sec)Following is the query to insert some records in the table using insert command:mysql> insert into DemoTable values(-10); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values(-20); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(20); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(10); Query OK, 1 row affected (0.13 sec) mysql> insert ... Read More
A duplicate buffer of a buffer can be created using the method duplicate() in the class java.nio.IntBuffer. This duplicate buffer is identical to the original buffer. The method duplicate() returns the duplicate buffer that was created.A program that demonstrates this is given as follows −Example Live Demoimport java.nio.*; import java.util.*; public class Demo { public static void main(String[] args) { int n = 5; try { IntBuffer buffer1 = IntBuffer.allocate(n); buffer1.put(8); buffer1.put(1); buffer1.put(3); buffer1.put(7); ... Read More
In this program we will see how to find the gray code from a binary number.Problem StatementWrite 8086 Assembly language program to find the equivalent gray code from a binary number. The number is stored at location 2500 and store the result at 2600.DiscussionTo convert binary to gray code, we have to shift the number one bit to the right, then XOR with the previous number. Thus the gray code will be generated. For a number 2C (0010 1100) the gray code will be 3A (0011 1010)InputAddressData……25002C…… Flow Diagram Program OutputAddressData……26003A……
In this section we will see how to check whether a number is odd or even without using any kind of conditional statements like (=, ==).We can easily check the odd or even by using the conditional statements. We can divide the number by 2, then check whether the remainder is 0 or not. if 0, then it is even. Otherwise we can perform AND operation with the number and 1. If the answer is 0, then it is even, otherwise odd.Here no conditional statements can be used. We will see two different methods to check the odd or even.Method ... Read More
Context variable can have different values depending on its context. Unlike Thread-Local Storage where each execution thread may have a different value for a variable, a context variable may be several contexts in one execution thread. This is useful in keeping track of variables in concurrent asynchronous tasks.The ContextVar class is used to declare and work with Context Variables.import contextvars name = contextvars.ContextVar("name", default = 'Hello')The optional default parameter is returned by ContextVar.get() when no value for the variable is found in the current context.name: The name of the variable. This is a read-only property.Following methods are defined in ContextVar ... Read More
Following example shows how a 407 error code is sent to the client browser. After this, the browser would show you "Need authentication!!!" message. Setting HTTP Status Code You will receive the following output −HTTP Status 407 - Need authentication!!! type Status report message Need authentication!!! description The client must first authenticate itself with the proxy (Need authentication!!!). Apache Tomcat/5.5.29