Introducing frtclap: A C++20 CLI Parser Library

Reflection in modern C++ enables code, which maps command line arguments directly to a struct. It turns handling CLI parameters to an easy task . Thanks Fırat Özkan for the library Has anyone else nice examples with C++ reflection?

𝐋𝐞𝐞𝐭𝐜𝐨𝐝𝐞 𝐃𝐚𝐢𝐥𝐲 𝐂𝐡𝐚𝐥𝐥𝐞𝐧𝐠𝐞 - 𝟑𝟑𝟏𝟖. 𝐅𝐢𝐧𝐝 𝐗-𝐒𝐮𝐦 𝐨𝐟 𝐀𝐥𝐥 𝐊-𝐋𝐨𝐧𝐠 𝐒𝐮𝐛𝐚𝐫𝐫𝐚𝐲𝐬 𝐈 🔹 Problem Overview: Given an array nums, an integer k (window size), and x, we slide a window of size k across the array and, for each window, calculate its x-sum — the sum formed by the top x most frequent elements (based on frequency, then value). If there are fewer than x distinct elements, we take the total sum of that subarray. 💡 Approach Explanation: [1] 𝐒𝐥𝐢𝐝𝐢𝐧𝐠 𝐭𝐡𝐞 𝐰𝐢𝐧𝐝𝐨𝐰: iterate over each window of size k in the array - total (n - k + 1) windows. [2] 𝐂𝐨𝐮𝐧𝐭𝐢𝐧𝐠 𝐟𝐫𝐞𝐪𝐮𝐞𝐧𝐜𝐢𝐞𝐬: For each window, use an unordered_map to store the frequency of each element. [3] 𝐒𝐞𝐥𝐞𝐜𝐭𝐢𝐧𝐠 𝐭𝐨𝐩 𝐱 𝐟𝐫𝐞𝐪𝐮𝐞𝐧𝐭 𝐞𝐥𝐞𝐦𝐞𝐧𝐭𝐬: use a min-heap (priority_queue) to maintain only the top x most frequent elements. • Each heap entry is {frequency, value}. • The heap ensures that only the most frequent (and if tie, higher value) elements remain. • If the heap size exceeds x, the least frequent is removed. [7] 𝐂𝐚𝐥𝐜𝐮𝐥𝐚𝐭𝐢𝐧𝐠 𝐱-𝐬𝐮𝐦: For the remaining x elements in the heap, calculate ans += frequency * value. That gives the x-sum for that particular window. Complexity: Time Complexity: O(n × k), Space Complexity: O(k + x) 𝑇𝘩𝑖𝑠 𝑎𝑝𝑝𝑟𝑜𝑎𝑐𝘩 𝑒𝑓𝑓𝑖𝑐𝑖𝑒𝑛𝑡𝑙𝑦 𝑐𝑜𝑚𝑏𝑖𝑛𝑒𝑠 𝑓𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦 𝑐𝑜𝑢𝑛𝑡𝑖𝑛𝑔 𝑎𝑛𝑑 𝘩𝑒𝑎𝑝 𝑙𝑜𝑔𝑖𝑐 𝑡𝑜 𝘩𝑎𝑛𝑑𝑙𝑒 𝑡𝘩𝑒 𝑠𝑢𝑏𝑎𝑟𝑟𝑎𝑦 𝑎𝑛𝑑 𝑓𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦-𝑏𝑎𝑠𝑒𝑑 𝑠𝑒𝑙𝑒𝑐𝑡𝑖𝑜𝑛 𝑝𝑟𝑜𝑐𝑒𝑠𝑠. #LeetCode #ProblemSolving #DSA #Cplusplus #CodingChallenge #SlidingWindow #Heap #Programming #DailyLeetcode

🚀 Day 76 of #100DaysOfCode — Reverse Words in a String (C++) Today I worked on a classic string manipulation problem — Reverse Words in a String — using only the reverse() function in C++. 🧩 Problem Statement: Given a string where words are separated by dots ('.'), the task is to reverse the order of the words while keeping the characters inside each word in the correct order. 📘 Example: Input: i.like.this.program.very.much Output: much.very.program.this.like.i 💡 Approach: First, reverse the entire string. Then, reverse each individual word between dots. Skip any empty segments to handle consecutive or trailing dots properly. Implemented the entire logic using only the reverse() function — no extra vector or split logic needed! 🧠 Concepts Used: String manipulation, two-pointer technique, in-place reversal, and C++ STL. #Day76 #100DaysOfCode #CPlusPlus #CodingChallenge #LeetCode #GeeksForGeeks #StringManipulation #CodeNewbie #ProblemSolving #SoftwareEngineering #DSA #DeveloperJourney #CodingCommunity

🧠 Day 37 of #100DaysOfCode 📦 Project: Number to Words Converter in C Today I built a C program that converts any number (up to 9 digits) into its word representation! 💬🔢 ✨ Highlights: Handles billions, millions, thousands, and hundreds with proper segmentation. Covers special cases like teens (10–19) and tens (20, 30, …). Modular design using arrays for digit names and a clean convert_hundreds() function. Input: 123456789 → Output: "One Hundred Twenty Three Million Four Hundred Fifty Six Thousand Seven Hundred Eighty Nine" This was a fun challenge in logic structuring and string formatting. It deepened my understanding of number decomposition and control flow in C. 💡 Next up: maybe adding support for decimals or currency formatting? 💸 🔧 Built with: C language Console I/O Arrays & conditionals #CProgramming #CodingChallenge #100DaysOfCode #CodeNewbie

💻 Built a Password & Unique ID Generator using C++ and DSA! Excited to share my latest mini-project — a Password & Unique ID Generator built entirely in C++, leveraging concepts from Data Structures and Algorithms (DSA) ⚙️ This project helped me explore: 🔹 String manipulation and randomization techniques 🔹 Implementation of time-based unique identifiers 🔹 Efficient use of STL (like vector, map, set) 🔹 Concepts of hashing and data security fundamentals The program generates strong, random, and unique IDs or passwords with customizable lengths and character combinations — useful for authentication systems, APIs, or even as a simple security utility tool. I believe small projects like this play a big role in mastering logic building and bridging the gap between theory and practical coding. 🚀 📂 Tech Stack: C++ | STL | DSA #Cplusplus #DSA #Coding #Programming #SoftwareDevelopment #LearningByBuilding #Projects #LinkedInCodingCommunity

C++Now 2025 - David Sankel: "C++ Program Correctness and its Limitations" youtu.be/In2elCXQ10A We talk about "correct" programs all the time, but what does that really mean? This talk dives into the tricky business of defining program correctness, exploring several attempts and their pitfalls along the way. Even with a solid definition, we'll see how formal correctness only goes so far in real-world software development. The talk concludes by looking at the bigger picture: what are we actually trying to achieve with correctness, and are there better ways to get there? --- David Sankel David Sankel is a Principal Scientist, leads Adobe's Software Technology Lab, and is an active member of the C++ Standardization Committee. His experience spans microservice architectures, CAD/CAM, computer graphics, visual programming languages, web applications, computer vision, and cryptography. He is a frequent speaker at C++ conferences and specializes in large-scale software engineering and advanced C++ topics. David’s interests include dependently typed languages, semantic domains, EDSLs, and functional reactive programming. He was the project editor of the C++ Reflection TS, is the Executive Director of the Boost Foundation, and authored several C++ proposals including pattern matching and language variants.

Smart Pointers in C++ — Modern Memory Management In C++, memory management has always been a critical topic. Before C++11, developers relied on raw pointers with `new` and `delete`, which often led to memory leaks. With C++11, the introduction of **smart pointers** completely changed the game! std::unique_ptr =>Owns an object exclusively. => Cannot be copied — ownership can only be transferred using `std::move`. `std::shared_ptr` =>Enables shared ownership of the same object. =>Automatically deletes the object when the last pointer goes out of scope. std::weak_ptr =>Observes a `shared_ptr` without extending its lifetime. #include <memory> #include <iostream> int main() { auto ptr = std::make_unique<int>(42); std::cout << *ptr << std::endl; } Smart pointers are one of the pillars of modern C++. If you want to write robust, efficient, and leak-free code. #Cplusplus #SmartPointers #ModernCpp #SoftwareDevelopment #Coding #Programming

just published a new breakdown on ref, in and out in C#, when to use them, how they work, and the performance trade-offs If you want a simple, quick and practical guide to passing parameters efficiently (with real examples), here you go 👇 🔗 https://lnkd.in/dbb_WtQ2 #csharp #dotnet #programming #softwareengineering #performance #cleancode #developers

Imagine we are trying to use a function that is not existent yet in C++, We would have identifier error and to solve you could either re-arrange your code or do a foward-declaration #include <iostream> int add(x,y); int main() { std::cout<<add(5,6); return 0; }; int add(int x , int y) { return x+y } This is essentially useful in multiple code files in C++