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Articles on Trending Technologies
Technical articles with clear explanations and examples
Where are the app cookies stored on the iPhone?
Cookies are small files which are stored on a user's device while browsing internet.When we talk about cookies in iPhone we usually talk about application using the Web Views or the browser applications.A normal iOS application does not contains cookies. An app will have cookies only if the application has one or more web views.To check where are the app cookies stored on iPhone, On an iPhone, go to Settings -> Safari -> Advanced -> Website Data and you will see all cookies stored on your device.For iOS Application using web view The UIWebView will automatically store the cookies in the sharedHTTPCookieStorage.
Read MoreHow to Create a Reminder Notification in Android?
This example demonstrate about How to Create a Reminder Notification in AndroidStep 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. Step 3 − Add the following code to src/MainActivity.package app.tutorialspoint.com.notifyme ; import android.app.AlarmManager ; import android.app.PendingIntent ; import android.content.Intent ; import android.os.Bundle ; import android.support.v7.app.AppCompatActivity ; import android.view.View ; import java.util.Calendar ; public class MainActivity extends AppCompatActivity { @Override protected void onCreate (Bundle savedInstanceState) { super .onCreate(savedInstanceState) ...
Read MoreThe Hidden Terminal Problem
In wireless LANs ( wireless local area networks), the hidden terminal problem is a transmission problem that arises when two or more stations who are out of range of each other transmit simultaneously to a common recipient. This is prevalent in decentralised systems where there aren’t any entity for controlling transmissions. This occurs when a station is visible from a wireless access point (AP), but is hidden from other stations that communicate with the AP.Problem IllustrationSuppose that there are three stations labelled STA, STB, and STC, where STA and STC are transmitting while STB is receiving. The stations are in ...
Read MoreCompare multiple properties in MongoDB?
To compare multiple properties, use the $where operator. Let us first create a collection with documents −> dbcomparingMultiplePropertiesDemoinsertOne({"Values":[10, 70, 60]}); { "acknowledged" : true, "insertedId" : ObjectId("5cf228fcb64a577be5a2bc0a") }Following is the query to display all documents from a collection with the help of find() method −> dbcomparingMultiplePropertiesDemofind()pretty();This will produce the following document −{ "_id" : ObjectId("5cf228fcb64a577be5a2bc0a"), "Values" : [ 10, 70, 60 ] }Case 1: If condition becomes true then you will get an array otherwise nothing will get displayed Following is the query to compare multiple ...
Read MoreDetermine what a MySQL DB’s charset is set to
Let’s say we are creating a database “web” −mysql> SHOW CREATE DATABASE web;This will produce the following output displaying the default charset as well −+----------+-----------------------------------------------------------------------------------------+ | Database | Create Database | +----------+-----------------------------------------------------------------------------------------+ | web | CREATE DATABASE `web` /*!40100 DEFAULT CHARACTER SET utf8 COLLATEutf8_unicode_ci */ | +----------+-----------------------------------------------------------------------------------------+ 1 row in set (0.03 sec)If you want to know ...
Read MoreProgram for converting Alternate characters of a string to Upper Case.\\n
You can convert a character to upper case using the toUpperCase() method of the character class.ExampleFollowing program converts alternate characters of a string to Upper Case. Live Demoimport java.util.Scanner; public class UpperCase { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter a string :"); String str = sc.nextLine(); str = str.toLowerCase(); char[] ch = str.toCharArray(); for(int i=0; i
Read MoreHow to determine the version of the C++ standard used by the compiler?
Sometimes we need to know that, what is the current C++ standard. To get this kind of information, we can use the macro called __cplusplus. For different standards, the value of this will be like below.Standard__cplusplus outputC++ pre C++981C++98199711LC++98 + TR1This cannot be checked, this will be marked as C++98C++11201103LC++14201402LC++17201703LExample#include int main() { if (__cplusplus == 201703L) std::cout
Read MoreHow to set font face, style, size and color for JTextPane text in Java
For background and foreground color of the JTextPane, use the following −JTextPane textPane = new JTextPane(); textPane.setBackground(Color.blue); textPane.setBackground(Color.green);For font face, style and size, use the Font class and set the font −Font font = new Font("Serif", Font.ITALIC, 18); textPane.setFont(font);The following is an example to set font, style and color for text in JTextPane −Examplepackage my; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Container; import java.awt.Font; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTextPane; import javax.swing.text.BadLocationException; import javax.swing.text.SimpleAttributeSet; import javax.swing.text.Style; import javax.swing.text.StyleConstants; import javax.swing.text.StyledDocument; public class SwingDemo { public static void main(String args[]) throws BadLocationException { JFrame frame = new JFrame("Demo"); ...
Read MoreHow to freeze an Object in JavaScript?
In the Real time world javascript doesn't have traditional classes as seen in other languages. It has objects and constructors. Object.freeze() is one among many constructor methods helps to freeze an object.Freezing an object does not allow new properties to be added to the object and also prevents the object from changing its own properties. Object.freeze() will always try to preserve the enumerability, configurability, writability and the prototype of the object. It won't create a frozen copy.Applications1) freeze() is used for freezing objects and arrays.2) freeze() is used to make an object immutable.SyntaxObject.freeze(obj)ExampleLive Demo // an object is created ...
Read MoreGroup all documents with common fields in MongoDB?
For this, use the $addToSet operator. Let us first create a collection with documents −> db.findDocumentWithCommonFieldsDemo.insertOne( { "UserId":1, "UserName":"Carol" } ); { "acknowledged" : true, "insertedId" : ObjectId("5cdf8ebebf3115999ed51200") } > db.findDocumentWithCommonFieldsDemo.insertOne( { "UserId":2, "UserName":"David" } ); { "acknowledged" : true, "insertedId" : ObjectId("5cdf8ebebf3115999ed51201") } > > db.findDocumentWithCommonFieldsDemo.insertOne( { "UserId":1, "UserName":"Sam" } ); { "acknowledged" : true, "insertedId" : ObjectId("5cdf8ebebf3115999ed51202") }Following is the query to display all documents from a collection ...
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