All Hard Articles

Art module in Python

Art package is used to print decorative art’s on the terminal as well as to save in file and a word can be represented by… Read More

python-modules

Python

Finding Connected Wi-Fi Password in a Windows System

Windows is one of the most famous and commonly used operating systems in computers, Now when we connect any Wi-Fi network to our system it… Read More

Technical Scripter 2020

Technical Scripter

TechTips

Multithreaded Servers in Java

Prerequisites: Socket Programming in Java Multithreaded Server: A server having more than one thread is known as Multithreaded Server. When a client sends the request,… Read More

Java-Multithreading

Java

Sum of nodes in the path from root to N-th node in given Tree

Given an integer N which needs to be present as a value in a node in the last level of a Tree rooted at 1… Read More

Binary Search

cpp-vector

number-theory

prefix-sum

Arrays

DSA

Mathematical

Searching

Tree

Check if it is possible to reach (X, Y) from (1, 1) by given steps

Given two integers X and Y, the task is to check if it is possible to reach (X, Y) from (1, 1) by the following… Read More

Bitwise-AND

GCD-LCM

maths-power

Bit Magic

DSA

Mathematical

Pattern Searching

Recursion

Check if string S2 can be obtained by appending subsequences of string S1

Given two strings S1 and S2, the task is to check if it’s possible to generate string S2 by repeatedly appending subsequences of S1 to… Read More

cpp-set

frequency-counting

subsequence

DSA

Greedy

Hash

Searching

Strings

Count pairs whose product contains single distinct prime factor

Given an array arr[] of size N, the task is to count the number of pairs from the given array whose product contains only a… Read More

combinatorics

number-theory

Prime Number

prime-factor

Algorithms

Arrays

C++ Programs

Combinatorial

Competitive Programming

DSA

Hash

Mathematical

Searching

Maximum sum possible from given Matrix by performing given operations

Given a matrix arr[][] of dimensions 2 * N, the task is to maximize the sum possible by selecting at most one element from each… Read More

Bitwise-XOR

DSA

Dynamic Programming

Mathematical

Matrix

Flutter – Scroll Snap List

The scroll_snap_list package provides a wrapper that wraps around the ListView.builder widget to enable snapping event on List items. It can be modified to horizontal… Read More

android

Flutter

Flutter UI-components

Dart

Flutter

Flutter – IgnorePointer Widget

IgnorePointer is a built-in widget in flutter which is similar to the AbsorbPointer widget, they both prevent their children’s widget from pointer-events which are taping,… Read More

android

Flutter

Flutter-widgets

Dart

Flutter

Java Program to Accept a Matrix of Order M x N & Interchange the Diagonals

Problem Description: Write a Java program that accepts a matrix of M × N order and then interchange diagonals of the matrix. Steps: 1. We… Read More

Java 8

Java-Output

Java.lang.Class

Output of Java Program

Technical Scripter 2020

Java

Java Programs

Technical Scripter

Encrypt PDF using Java

We can encrypt any PDF using Java by using the external library PDFBox. Inside PDFBox library 2 classes are available StandardProtectionPolicy and AccessPermission Class. Encryption… Read More

Java

Java Programs

Singleton Pattern in Python – A Complete Guide

A Singleton pattern in python is a design pattern that allows you to create just one instance of a class, throughout the lifetime of a… Read More

python-design-pattern

Python

Maximum repeating character for every index in given String

Given string str consisting of lowercase alphabets, the task is to find the maximum repeating character obtained for every character of the string. If for… Read More

frequency-counting

strings

DSA

Hash

Strings

Count numbers in range [L, R] whose sum of digits is a Prime Number

Given two integers L and R, the task is to count all the numbers in the range [L, R] whose sum of digits is a… Read More

number-digits

Prime Number

sieve

DSA

Dynamic Programming

Mathematical

Searching

Check if a string can be obtained by appending subsequences of another string

Given two strings str1 and str2 of lengths N and M respectively, the task is to check if str2 can be formed by appending subsequences… Read More

Binary Search

DSA

Searching

Strings

Count quadruplets with sum K from given array

Given an array arr[] of size N and an integer S, the task is to find the count of quadruplets present in the given array… Read More

cpp-map

cpp-unordered_map

HashTable

interview-preparation

Arrays

DSA

Hash

Searching

Count number of triangles cut by the given horizontal and vertical line segments

Given an array triangles[][] consisting of N triangles of the form {x1, y1, x2, y2, x3, y3} and an array cuts[] consisting of M horizontal… Read More

Geometric-Lines

triangle

Arrays

Competitive Programming

Data Structures

DSA

Geometric

Mathematical

How to install the ext-curl extension with PHP 7 ?

The ext-curl CURL stands for client user, In Linux cURL is a PHP extension, that allows us to receive and send information via the URL… Read More

how-to-install

PHP-Misc

Picked

How To

Installation Guide

PHP

Web Technologies

Class 8 NCERT Solutions – Chapter 6 Squares and Square Roots – Exercise 6.1

Problem 1: What will be the unit digit of the squares of the following numbers? Solution: To find the unit digit of the square of… Read More

NCERT Solutions Class-8

Class 8

Mathematics

NCERT

School Learning