Binary Search Algorithm – Deep thinking with Java

import java.util.Scanner;   class BinarySearch { public static void main(String args[]) { int c, first, last, middle, n, search, array[];   Scanner in = new Scanner(System.in); System.out.println(“Enter number of elements”); n = in.nextInt(); array = new int[n];   System.out.println(“Enter ” + n + ” integers”);     for (c = 0; c < n; c++) […]

IOS – Main Thread Checker: UI API called on a background thread: -[UIApplication delegate] PID: 902, TID: 13120, Thread name: (none), Queue name: NSOperationQueue 0x604000037a20 (QOS: UNSPECIFIED), QoS: 0 Backtrace:

Solution : use DispatchQueue.main.async { // Correct }     Updating UI from a Completion Handler Long-running tasks such as networking are often executed in the background, and provide a completion handler to signal completion. Attempting to read or update the UI from a completion handler may cause problems. let task = URLSession.shared.dataTask(with: url) { […]

Firebase for android : Read list of data from database and show on recyclerview

Part -1 : Take that we have some data field on child node named “user” . We will first retrieve all data and then we will show it on recyclerview. , public class UserListActivity extends AppCompatActivity { private DatabaseReference mDatabase; ArrayList<User> userArrayList; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_user_list); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); […]

!] Unable to add a source with url `https://github.com/CocoaPods/Specs.git` named `master-1`. You can try adding it manually in `~/.cocoapods/repos` or via `pod repo add`.

Open Terminal and run this command that will add the source on master branch on cocoapod repos .   $ cd ~/.cocoapods/repos $ git clone https://github.com/CocoaPods/Specs.git master     if again issuing already has master branch and it’s not empty and completely remove cocoapod and install from new . How to uninstall cocoapod completely and install new

Android Encryption and Decryption String with AES/DES .

Base Class :  import android.util.Base64; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.security.GeneralSecurityException; import java.security.InvalidAlgorithmParameterException; import java.security.InvalidKeyException; import java.security.NoSuchAlgorithmException; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.NoSuchPaddingException; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; /** * Created by ADN Digital on 1/17/2018. */ public class EncryptionDecryption { public static String encrypt(String value, String key) throws UnsupportedEncodingException, InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidAlgorithmParameterException, […]

Android notify users when app version is updated on play store .

1 . First get current play store version. int currentVersion,updateVersion; VersionChecker versionChecker = new VersionChecker(); try { String latestVersion = versionChecker.execute().get(); updateVersion = Integer.parseInt(latestVersion.substring(latestVersion.length()-1)); Toast.makeText(HomeActivity.this, latestVersion.toString(), Toast.LENGTH_SHORT).show(); } catch (InterruptedException e) { e.printStackTrace(); } catch (ExecutionException e) { e.printStackTrace(); } PackageManager manager = this.getPackageManager(); PackageInfo info = null; try { info = manager.getPackageInfo(this.getPackageName(), 0); } […]

Swift 3 / 4 get current location with location manager .

Step – 1 :  First define LocationManager . And Current location of CLLocaion .   var manager = CLLocationManager() var currentLocation: CLLocation! Step 2 : In ViewDidController get Current location with location manager . That’s it .   manager.requestWhenInUseAuthorization()                  if (CLLocationManager.authorizationStatus() == CLAuthorizationStatus.authorizedWhenInUse ||       […]

Swift 3 /4 take photo from camera or gallery and show it .

Step One : First create a project and take imageView and a button to capture image . Connect it to ViewController . Step Two : Copy this code and run . hope it will be done . 😀    class ImageCapture: UIViewController , UIImagePickerControllerDelegate,UIPopoverControllerDelegate,UINavigationControllerDelegate{      @IBOutlet var imageViewWeight: UIImageView!      var imagePicker:UIImagePickerController?=UIImagePickerController() override func viewDidLoad() { […]

Laravel 5.5 : include css , js and image for boostrap theme .

Put your assets in the public folder public/css public/images public/fonts public/js And then called it using Laravel   {{ URL::asset(‘js/scrollTo.js’); }} // Generates the path to public directory public/js/scrollTo.js {{ URL::asset(‘css/css.css’); }} // Generates the path to public directory public/css/css.css {{ URL::asset(‘image/one.png’); }} //Generates the path to public directory public/image/one.png or {{ HTML::script(‘js/scrollTo.js’); }} // […]

Script php artisan clear-compiled handling the pre-update-cmd event returned with error code 255

In laravel there may be shown the following error when working with bellow laravel 5.3 projects . Cause composer structure has been changed .   So how to solve it : Its easy way to just replace the code in composer.php (Only bold sections) :   { “name”: “laravel/laravel”, “description”: “The Laravel Framework.”, “keywords”: [“framework”, […]

Laravel : Specified key was too long error

Laravel 5.4 or later  made a change to the default database character set, and it’s now utf8mb4 which includes support for storing emojis. This only affects new applications and as long as you are running MySQL v5.7.7 and higher you do not need to do anything. For those running MariaDB or older versions of MySQL you may […]

IOS 10 : TableView tutorial with Swift 3 – most easy way

import UIKit class ViewController: UIViewController , UITableViewDelegate , UITableViewDataSource{ var names = [“arif”,”hasnat”,”ios”,”developer”] @IBOutlet weak var tableView: UITableView! override func viewDidLoad() { super.viewDidLoad() tableView.delegate = self tableView.dataSource = self } func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return names.count } func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { let cell […]

Insertion Sort Algorithm

Insertion Sort: Insertion sort is a simple sorting algorithm that is relatively efficient for small lists and mostly sorted lists, and is often used as part of more sophisticated algorithms. It works by taking elements from the list one by one and inserting them in their correct position into a new sorted list.[17] In arrays, […]

Android Schedule Notifications at specific time

A notification is a message you can display to the user outside of your application’s normal UI. When you tell the system to issue a notification, it first appears as an icon in the notification area. To see the details of the notification, the user opens the notification drawer. Both the notification area and the […]

Android Push Notification Using Firebase

Firebase is a very nice services of Google specially for mobile   platform . Apps developer can do many things simply . Firebase has several features including real-time database , hosting, messaging , notifications ,analytics , app-linking ,admob and so on . I will discuss here push notification using firebase including big image notification. Firebase Account and […]