I implemented the below classes for transfer amount between different accounts. Used ConcurrentHashMap and Stamped Lock to handle concurrency. Am I missing any important concepts here? Are there any improvements that can be done to improve performance and key builder logic? What could be some few...

The util class to find all the indexes on an element into a Collection supports forward and reverse lookup starting from a given index along with changing the Collection the element’s index is to be found into. A convoluted implementation of Builder design pattern starting from the simplest imple...

This time, I have a simple string view class for faster operation on substrings in actual string objects: com.github.coderodde.util.StringView.java: package com.github.coderodde.util; import java.util.Objects; /** * This class implements a string view that can be enlarged, shrinked or * shift...

I asked similar question on stackoverflow, but here I am trying to get a code review. I never write a production code for frontend part, so I need some sight from the side. I am trying to implement role-based protection in ReactJS (typescript) application. I have searched the web for this topic, ...

#include <iostream> #include <cstdlib> #include <ctime> using namespace std; double money = 100; int blackJack(); int numberguess(); void main2() { srand(static_cast<unsigned int>(time(0))); if (money == 0) { cout << "Sorry you hit 0 dollars \a"; return; } ...