How can I make the code more readable and more efficient? (provided code is O(n^2) time, but intuition says it can be pre-processed and done in O(n) time) Description it tags the first and last of each object matching a condition, and removes all objects without tags the input order must be pre...

This is a problem I have been trying to work on for the last week and I have been struggling a lot. I think I finally got it to work, but I am still not fully sure if my R code is correct. Here is the problem: Suppose there is a factory that on day 1 has 100 boxes New boxes arrive according to s...

Have Implemented below service registry class with 2 load balancing strategies.Used Strategy Pattern. Used Stamped lock ( Optimistic write locking) for ensuring thread safety and concurrency. Used Atomic Integer and ThreadLocalRandom in round robin and random load balancers for concurrency. Am...

EDIT: This post has a single question but a lot of context. The single question is if there are downsides with the approach I'm taking over the common Visitor pattern. I've been thinking about the way the Visitor pattern works and how to create a better implementation that is easier to understand...

As a part of bigger project, I want to add tutorial mode after first user login. That mode is simply a QFrame showing description of highlighted element in parent window + Next/Cancel buttons, moving to the next element or stopping tutorial mode completely. In particular, it works as follows: Ma...