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A thread in computer science is a set of instructions that can be managed independently by a scheduler, which is a part of operating system.The main function of Threading is to run multiple threads at a time. Threads means different tasks, function calls in the program and multiple threads run at the same time that does not means that they are executed on different machines.Multi-threading is used in two cases.When the outputs of the sub-programs need to combined with main program.When main program contains piece of code that are relatively independent of each other.Threading modulePython provides Threading module which is ... Read More
This example demonstrate about How to check existence of an element in android listview.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. In the above code, we have taken editext, button and listview. When user click on button after inserting value in edittext, it will do data validation with listview items.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.EditText; import ... Read More
To store username and passwords safely in MySQL database, we can use MD5().Let us see an example. First, we will create a table. The CREATE command is used to create a table.mysql> create table UserNameAndPasswordDemo - > ( - > U_Id int(10) unsigned NOT NULL AUTO_INCREMENT, - > UserId varchar(255) DEFAULT NULL, - > UserPassword varchar(255) DEFAULT NULL, - > primary key(U_Id), - > UNIQUE KEY `UserId` (`UserId`) - > ); Query OK, 0 rows affected (0.61 sec)Inserting records and safely storing passwords with the help of MD5().mysql> INSERT INTO UserNameAndPasswordDemo(UserId, UserPassword) VALUES ('John@gg.com', MD5('john123')); Query OK, 1 row affected ... Read More
This example demonstrate about How to add footer view to android listview.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 code, we have taken listview to show array valuesStep 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.view.Gravity; import android.widget.ArrayAdapter; import android.widget.EditText; import android.widget.ListView; import android.widget.TextView; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.HashSet; public class MainActivity extends AppCompatActivity ... Read More
The Trim() function is used to remove new line characters from data rows in MySQL. Let us see an example. First, we will create a table. The CREATE command is used to create a table.mysql> create table tblDemotrail - > ( - > id int, - > name varchar(100) - > ); Query OK, 0 rows affected (0.57 sec)Let us now insert some records.mysql> insert into tblDemotrail values(1, 'John '); Query OK, 1 row affected (0.15 sec) mysql> insert into tblDemotrail values(2, ' Carol'); Query OK, 1 row affected (0.32 sec) mysql> insert into tblDemotrail values(3, ' Sam ... Read More
This example demonstrate about Factory method to create Immutable Set in android.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 listview to add immutable set.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.TextView; import java.util.Arrays; import java.util.Collections; import java.util.HashSet; import java.util.Set; public class MainActivity extends AppCompatActivity { ListView ... Read More
This example demonstrate about Factory method to create Immutable List in android.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 listview to add immutable list.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.TextView; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.HashSet; import java.util.List; import java.util.Set; public class MainActivity extends ... Read More
This example demonstrate about How to sort an array elements in android.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 text view to sorted array.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.widget.TextView; import java.util.ArrayList; public class MainActivity extends AppCompatActivity { TextView text; int temp; int[] ... Read More
Synchronization between processesMultiprocessing is a package which supports spawning processes using an API. This package is used for both local and remote concurrencies. Using this module, programmer can use multiple processors on a given machine. It runs on Windows and UNIX os.All equivalent synchronization primitives are present in this package.Example codefrom multiprocessing import Process, Lock def my_function(x, y): x.acquire() print ('hello world', y) x.release() if __name__ == '__main__': lock = Lock() for num in range(10): Process(target= my_function, args=(lock, num)).start()Here one instance can lock ... Read More
This example demonstrate about How to check edit text values are Anagram or Not in android.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 two edit texts to take the data from the user and when user click on a button it will give the result on toast.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Build; import ... Read More