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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to detect swipe direction between left/right and up/down in Android using Kotlin?
This example demonstrates how to detect swipe direction between left/right and up/down in Android using Kotlin.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. Step 3 − Add the following code to src/MainActivity.ktimport android.content.Context import android.os.Bundle import android.view.GestureDetector import android.view.MotionEvent import android.view.View import android.widget.Toast import androidx.appcompat.app.AppCompatActivity import kotlin.math.abs class MainActivity : AppCompatActivity() { var onSwipeTouchListener: OnSwipeTouchListener? = null override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) ...
Read MoreHow to display progress dialog before starting an activity in Android using Kotlin?
This example demonstrates how to display progress dialog before starting an activity in Android using Kotlin.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. Step 3 − Add the following code to src/MainActivity.ktimport android.app.ProgressDialog import android.os.AsyncTask import android.os.Bundle import androidx.appcompat.app.AppCompatActivity @Suppress("DEPRECATION") class MainActivity : AppCompatActivity() { private lateinit var progressDialog: ProgressDialog override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) title ...
Read MoreHow to detect Scroll Up & Scroll down in Android ListView using Kotlin?
This example demonstrates how to detect Scroll Up & Scroll down in Android ListView using Kotlin.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. Step 3 − Add the following code to src/MainActivity.ktimport android.os.Bundle import android.widget.* import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { private var scrollView: ScrollView? = null private lateinit var listView: ListView private var numbers = arrayOf( "1", "2", ...
Read MoreSum of two large numbers in C++
In this problem, we are given two string that defines two large numbers. Our task is to create a program to find the sum of two large numbers.Let's take an example to understand the problem, Input: number1 = "341299123919" number2 = "52413424" Output: 341351537343To solve this problem, we will traverse both the string. And add digit by digit and propagate the carry. And store the result digit by digit to sum string.AlgorithmInitialize sum = 0, carry = 0. Step 1: loop from n to 0. Step 1.1: intSum = number1[i] + number2[i] Step 1.2: carry = intSum/10. Sum += intSum ...
Read MoreWorking with csv files in Java
OpenCSV has to be installed first, which is a parser library for Java. The dependency has to be mentioned in the pom.xml file in the maven project. After that, the below code can be utilized.Exampleimport java.io.FileReader; import java.io.*; public class Demo{ public static void readDataLineByLine(String file){ try{ FileReader my_filereader = new FileReader(file); CSVReader csvReader = new CSVReader(my_filereader); String[] nextRecord; while ((nextRecord = csvReader.readNext()) != null){ for (String cell : nextRecord){ ...
Read MoreWhat's the connection between Java and Blockchain?
Blockchain has become a buzz word in the recent times. It is being tried to be implemented in every software for various purposes, to check how it would work efficiently given different scenarios. It is a decentralized technology. It basically is data that is digital in nature and every piece of data is known as a transaction. Hence, the date, time and amount of that specific transaction is stored in the blockchain. Every block is unique due to the unique code it has, that is also known as ‘hash’. It is created with the help of different specialized algorithms.Investors are ...
Read MoreMaximum number of Zombie processes a system can handle in C++
Given the task is to find the maximum number of Zombie processes that a system can handle or in other words, the program does not stop its execution.A Zombie process (also known as defunct process) is a process that has completed its process via exit() (system call) but still has an entry in the process table.Approach used in the below program as followsNote that should be added in order to run the program.In main() function initialize num = 0 of type int which we will iterate until the program stops being executed.To initiate a zombie process create a while statement ...
Read MoreWhat are C++ features missing in Java?
There are many features that can be seen in C++ but not in Java. A few of them have been listed below −No unsigned int option in JavaNo destructor in Java as well as ‘delete’ since garbage collector performs this operation for it.No friend classes or friend functions in Java.There are no pointers in Java.There is no typedef option in Java.Since Java is a purely object oriented language, there are no global variables or global functions.The concept of templates present in C++ can’t be found in Java.The ‘::’ scope resolution operator is not there, since there is no question of ...
Read MoreUpper bound and Lower bound for non increasing vector in C++
In this article we are going to discuss the vector::upper_bound() and vector::lower_bound() for an array sorted in non-increasing order in C++ STL.Vectors are similar to the dynamic arrays; they have the ability to modify its size itself whenever a value is inserted into or removed from the container where we are storing the value.In a Vector, lower bound returns an iterator pointing to the first element in the range that does not compare the given value. Upper Bound returns an iterator pointing element in the range that smaller than given value.Input 30 30 30 20 20 20 10 10Output Lower bound of ...
Read MoreSplit the sentence into words in C++
Given is the task to split the sentence into words. In this, we will separate all the words present in sentence.Input I am a good boyOutput I am a good boyIn the above example we will print the single word in single line.Example#include #include #include Using namespace std; void split( string st){ String word = “ “; for ( char s : st){ If (s== ‘ ‘){ Cout
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