2D Arrays in Java Explained Simply

🔹 Polymorphism in C++ — Approach 2 (Runtime Polymorphism) This video is part of my "C++ OOP & Class Relationships Explained" series 👇 It also connects to my Design Patterns in C++ playlist. 💡 The idea: Using inheritance and virtual functions to decide behavior at runtime. 🔥 Pros: >Very flexible >Enables working with different types via a base class >Ideal for large, scalable systems ⚠️ Cons: >Slightly slower due to virtual dispatch >Some optimizations (like inlining) may not apply 📌 Takeaway: This is the standard polymorphism approach in most real-world applications. 🎥 Watch here: https://lnkd.in/d9yw555P 📚 Design Patterns playlist: https://lnkd.in/dH73xkFW 📚 Full source code, UML diagrams, and notes are available on GitHub: https://lnkd.in/d7EmTwzr #cpp #oop #polymorphism #softwaredesign #designpatterns #programming

💡 𝐂#/.𝐍𝐄𝐓 𝐓𝐢𝐩 - 𝗗𝗲𝗰𝗹𝗮𝗿𝗮𝘁𝗶𝗼𝗻 𝗣𝗮𝘁𝘁𝗲𝗿𝗻 🔥 💎 𝗪𝗵𝗮𝘁 𝗶𝘀 𝗶𝘁? Declaration patterns let you check the runtime type of an expression AND declare a new variable in one step. When the pattern matches, the variable is automatically assigned with the converted result. This eliminates the need for separate type checking and casting. ✅ 𝗞𝗲𝘆 𝗕𝗲𝗻𝗲𝗳𝗶𝘁𝘀 ◾ Combines type checking and variable declaration in a single, readable expression. ◾ Eliminates explicit casting and reduces boilerplate code. ◾ Prevents type mismatch errors with compile-time safety. ⚡ 𝗖𝗼𝗺𝗺𝗼𝗻 𝗨𝘀𝗲 𝗖𝗮𝘀𝗲𝘀 ◾ Type checking in if statements: if (obj is string text). ◾ Switch expressions with pattern matching. ◾ Processing collections with different element types. 🤔 Do you use declaration patterns in your code? #csharp #dotnet #programming #softwareengineering #softwaredevelopment

🚀 🧠 Logical Programming Series – Challenge 5 🔍 Find duplicate characters between two strings 📌 Example: "hello" & "world" → l, o 💻 C# Quick Solution: var result = new HashSet<char>(str1) .Intersect(str2); Console.WriteLine(string.Join(", ", result)); ⚡ Simple problem. Powerful concept. Perfect for interviews 💯 💬 Can you solve it without using extra space or using LINQ? 👀 #codingchallenge #dotnet #csharp #developers #programming #codinginterview #learncoding 🚀🔥

🔹 Polymorphism in C++ — Approach 1 (Function Overloading) This video is part of my "C++ OOP & Class Relationships Explained" series. 👇 And also connects to my Design Patterns in C++ playlist. 💡 The idea: Using function overloading to handle different class types. ✅ Pros: >Simple and easy to understand >Great for beginners ❌ Cons: >You must write a new function for every class >Code duplication increases >Poor scalability >Hard to work with mixed types in a single container 📌 Takeaway: This approach is useful for learning, but not practical for scalable systems. 🎥 Main video: https://lnkd.in/d9yw555P 📚 Design Patterns playlist: https://lnkd.in/dH73xkFW 📚 Full source code, UML diagrams, and notes are available on GitHub: https://lnkd.in/d7EmTwzr #cpp #programming #softwareengineering #oop #polymorphism #designpatterns

Ever needed a high‑resolution bitmap of a LaTeX formula for a legacy report or a custom GUI? Python developers can now achieve that with a .NET‑based SDK that renders LaTeX directly into BMP files. The guide starts by walking you through the prerequisites—installing the SDK, configuring the runtime, and setting up a simple console project. Once the environment is ready, you’ll see how to load a LaTeX string, invoke the rendering engine, and produce a BMP image with full control over resolution and color depth. The workflow also covers handling complex equations and embedded graphics, ensuring the output matches the original document’s precision. After rendering, the sample code saves the BMP to disk and includes verification steps to confirm image quality. Common pitfalls, such as font mismatches and memory usage, are addressed with practical troubleshooting tips. A complete, ready‑to‑run code example is included, so you can copy, adapt, and integrate the solution into your own applications in minutes. #Python #LaTeX #ImageProcessing #DotNet #Automation https://lnkd.in/dTkyAU4Z

🚀 Leveling up my DSA skills: Mastering the Sliding Window! I recently tackled the "Longest Substring Without Repeating Characters" problem on LeetCode using C++. This was a great exercise in optimizing time complexity and understanding how to manage dynamic windows within a string. 💡 The Approach To solve this efficiently, I used the Sliding Window technique combined with an unordered_map: Expansion: The high pointer expands the window by adding characters to the frequency map. Contraction: If the number of unique characters in the map is less than the window size ($f.size() < k$), it means we have a duplicate. The low pointer then slides forward, removing characters until the window is valid again. Efficiency: This approach ensures we traverse the string in $O(n)$ time, which is much better than a brute-force $O(n^2)$ search. #LeetCode #CodingJourney #CPP #DataStructures #Algorithms #SoftwareEngineering #ProblemSolving #SlidingWindow #Programming

💡 𝗖#/.𝐍𝐄𝐓 𝐂𝐥𝐞𝐚𝐧 𝐂𝐨𝐝𝐞 𝐓𝐢𝐩 🔥 💎𝗪𝗵𝗮𝘁 𝗶𝘀 𝗣𝗿𝗼𝗽𝗲𝗿𝘁𝘆 𝗣𝗮𝘁𝘁𝗲𝗿𝗻 𝗠𝗮𝘁𝗰𝗵𝗶𝗻𝗴? Property Pattern Matching allows you to test whether an object's properties or fields match specific values without verbose null checks and nested conditions. It transforms complex if-else chains into clean, declarative expressions that clearly communicate your intent. ✅ 𝗞𝗲𝘆 𝗔𝗱𝘃𝗮𝗻𝘁𝗮𝗴𝗲𝘀 ◾ 𝗖𝗼𝗻𝗰𝗶𝘀𝗲𝗻𝗲𝘀𝘀: Reduces 5-6 lines of traditional null checks into a single readable expression. ◾ 𝗘𝘅𝗽𝗿𝗲𝘀𝘀𝗶𝘃𝗲𝗻𝗲𝘀𝘀: Enables nested property matching and complex conditions in a natural, readable syntax. ◾ 𝗧𝘆𝗽𝗲 𝗦𝗮𝗳𝗲𝘁𝘆: Compile-time validation catches errors early and eliminates runtime type mismatches. 🤔 Which one do you prefer? #csharp #dotnet #programming #softwareengineering #softwaredevelopment

💡 𝗖#/.𝐍𝐄𝐓 𝐂𝐥𝐞𝐚𝐧 𝐂𝐨𝐝𝐞 𝐓𝐢𝐩 🔥 💎𝗪𝗵𝗮𝘁 𝗶𝘀 𝗣𝗿𝗼𝗽𝗲𝗿𝘁𝘆 𝗣𝗮𝘁𝘁𝗲𝗿𝗻 𝗠𝗮𝘁𝗰𝗵𝗶𝗻𝗴? Property Pattern Matching allows you to test whether an object's properties or fields match specific values without verbose null checks and nested conditions. It transforms complex if-else chains into clean, declarative expressions that clearly communicate your intent. ✅ 𝗞𝗲𝘆 𝗔𝗱𝘃𝗮𝗻𝘁𝗮𝗴𝗲𝘀 ◾ 𝗖𝗼𝗻𝗰𝗶𝘀𝗲𝗻𝗲𝘀𝘀: Reduces 5-6 lines of traditional null checks into a single readable expression. ◾ 𝗘𝘅𝗽𝗿𝗲𝘀𝘀𝗶𝘃𝗲𝗻𝗲𝘀𝘀: Enables nested property matching and complex conditions in a natural, readable syntax. ◾ 𝗧𝘆𝗽𝗲 𝗦𝗮𝗳𝗲𝘁𝘆: Compile-time validation catches errors early and eliminates runtime type mismatches. 🤔 Which one do you prefer? #csharp #dotnet #programming #softwareengineering #softwaredevelopment

🚀 🧠 Logical Programming Series – Challenge 4 🔍 Problem Statement: Find the last occurrence of a non-repeating character in a given string. 💡 A non-repeating character is one that appears only once in the string. Your task is to identify the last such character based on its position. 📌 Example: Input: "swiss" Output: 'w' 👉 Explanation: 's' appears multiple times 'i' appears once 'w' appears once The last non-repeating character is 'w' 🧠 Approach: 1️⃣ Use a Dictionary to store character frequency 2️⃣ Traverse the string from right to left 3️⃣ Return the first character with frequency = 1 💻 C# Solution (Using Dictionary): using System; using System.Collections.Generic; class Program { static char? FindLastNonRepeating(string str) { Dictionary<char, int> freq = new Dictionary<char, int>(); // Step 1: Count frequency foreach (char ch in str) { if (freq.ContainsKey(ch)) freq[ch]++; else freq[ch] = 1; } // Step 2: Traverse from right for (int i = str.Length - 1; i >= 0; i--) { if (freq[str[i]] == 1) return str[i]; } return null; // No non-repeating character } static void Main() { string input = "swiss"; var result = FindLastNonRepeating(input); Console.WriteLine(result.HasValue ? result.ToString() : "No non-repeating character found"); } } ⚡ Time Complexity: O(n) ⚡ Space Complexity: O(n) 💬 Bonus Challenge: Can you solve this using LINQ or without extra space? #LogicalProgramming #CSharp #DotNet #CodingChallenge #ProblemSolving #DeveloperCommunity

Free course on "Calculator implementation in C++ using Expression Grammar (context free grammar)" From Chapter 6 of the book "Programming: Principles and Practice using C++" by Bjarne Stroustrup. I have tried to share my learning experience while converting Expression Grammar into the Calculator program using C++. Hope, it will help people like me to understand the concepts in a faster way and help to resolve doubts. While coding the program, I am also sharing the thought process which goes on in developers mind. We will face compile-time, run-time errors and then we will resolve them using gdb debugger. Implementing Expression Grammar in C++ gives us a bit of understanding on how the parsing works. Instructor: Kashinath Chillal (Founder, Aloraq Software (OPC) Pvt. Ltd.) https://lnkd.in/gX8eXRK3