Problem: We are given a number N and we have to find the smallest possible palindrome greater than N that can be formed by using the same set of digits as in N. …

Did you ever think who understands google.com when you type that in your address bar? 🤔 How does this magic happen? ✨ There isn’t a delivery boy to hand over an HTML page directly. Let’s understand the crux of this superfast procedure 🚀 starting from typing a URL address to…

A lambda function is a function that you can write inline in your source code In this article, I’ll first explain why lambdas are great, what are closures vs how lambdas are different from closures? …

How virtual vs. multiple inheritance affect class object construction order? I’ll try to keep this post short and simple 😊 Table of Contents An example class having virtual and/or multiple inheritance What are the rules for object construction order? Understanding the object construction order rules Let’s apply the rules, shall we? Bonus Question Example: A class having virtual and/or multiple inheritance

Using In-member initialization, using constructors smartly and using class members functions in a safe and proper way to avoid mistakes Table of Contents Use member initializers in the same order as their declaration Prefer in-class member initializer over constant initializations OR over default constructor. Don’t cast away const, ever! Use delegating constructors to…

Some puzzles from various talks, blog posts, and other bits Table of Contents Puzzle 1: Capturing unique_ptr by reference Puzzle 2: Capturing the temporary by the reference Puzzle 3: Making mistakes with std functions usage Puzzle 4: Throwing away the dead Puzzle 1: Capturing unique_ptr by reference unique_ptr<A> myFun() { unique_ptr<A> pa(new A()); return…

Let’s discuss what coroutines are in general and how C++20 is introducing them Table of Contents 1. Prerequisite Terminology 2. What are coroutines? 3. Coroutines vs Subroutines? 4. Coroutines vs Threads 5. Applications of coroutines 6. Example in Python 7. How to simulate coroutines in traditional C++ 8. Coroutines in C++20 9. Restrictions Prerequisite Terminology …

How to use a custom deleter with an unique_ptr and shared_ptr Related post: https://medium.com/pranayaggarwal25/a-tale-of-two-allocations-f61aa0bf71fc Table of Contents Introduction The true unknown face of smart pointers What is std::default_delete indeed? Ways to specify custom deleters Using custom deleter with shared_ptr Using custom deleter with unique_ptr Storage of custom deleters Restrictions that come with custom…

Also known as Forwarding reference Prerequisites: Rvalue references Table of Contents: 1. Introduction 2. The double life of “&&” 3. How to identify a Universal Reference 4. Universal Reference in templates 5. Universal Reference in auto 6. How does the magic of Univeral Reference work? 7. Handle with care 8. What is the need? The perfect forwarding problem 9. How to…