Solutions Nerds

In this coding tutorial, we break down a complete Java solution for reversing an integer – a common interview question from companies like Google, Amazon, and Facebook. We'll handle edge cases, avoid integer overflow, and write clean, efficient code. 📌 What You'll Learn: ✅ How to reverse digits of an integer mathematically ✅ Why using long prevents integer overflow ✅ How to handle negative numbers correctly ✅ Proper bounds checking with Integer.MAX_VALUE and Integer.MIN_VALUE ✅ Step-by-step debugging of the reversal process ⚠️ Important Edge Cases Covered: Input: 123 → Output: 321 Input: -456 → Output: -654 Input: 1534236469 → Output: 0 (overflow case!) Input: -2147483648 → Special MIN_VALUE handling Input: 0 → Output: 0 📚 Perfect For: Java beginners learning algorithm fundamentals Coding interview preparation Computer science students Developers practicing LeetCode/HackerRank problems public class ReverseInteger { // Main method to test the reverse function public...

Hey everyone! In this quick coding tutorial, I walk through a simple Java program that finds the median of two arrays. We manually merge two arrays, sort them, and then calculate the median step by step. What we cover in this video: Creating two sample arrays and merging them without using built-in merge methods Manual array copying using loops Sorting the combined array with Arrays.sort() Determining if the array length is odd or even Calculating the median based on the middle element(s) Printing the final result Code Example Used: We work with two arrays: {1, 3, 2} and {5, 4, 6} , merge them, sort to  {1, 2, 3, 4, 5, 6}, and compute the median. Why I Made This: I often see median problems in coding interviews, so I wanted to break down the logic clearly without relying on complex libraries. This is a beginner-friendly approach to understanding what happens under the hood. Got Questions or Suggestions? Drop them in the comments — I read them all! If you foun...

  Ever felt like you're repeating yourself? Well, strings shouldn’t either! 🧵 In this coding challenge, your mission is to find the  longest section of a given string where no character appears more than once . It sounds simple, but it’s a classic puzzle that makes you think about efficiency, memory, and clever iteration. What you’ll practice: Looping through strings in smart ways Tracking characters you’ve already seen (hint: sets or maps are your friends!) Sliding window technique—a super useful tool for many problems Writing clean, fast code without nested loops if possible Example to get you started: "abcabccc" → "abc" (length 3) "defggft" → "defg" (length 4) Think about: What if the string is empty? Should case matter? (usually yes, unless stated otherwise) How can you avoid starting over from scratch each time? It’s a perfect problem to level up your Java skills and get comfortable with more advanced string manipulation. Give it a t...

In this video, we will find duplicates in the given array or data. We will find an effective way of doing it in Java. We are going to use three methods so stay tuned.

Assalam Alaikum, and welcome to Solutions Nerd. In this video, we'll solve a Java problem efficiently. Let's get started! I've begun a playlist where I'll upload problem solutions using Java. You can adapt these solutions to your preferred programming language. Problem Overview We have two strings: String A: "apple" (a common fruit name) String B: "alpep" (appears to be an anagram of "apple" with rearranged letters) We need to determine if these two strings contain the same characters and are permutations of each other. Solution Approach We'll solve this without using complex data structures or algorithms. Here's our strategy: Create a result string  to store matched characters Use nested loops  to compare characters ...

Here are popular programming languages and its creator with his complete history. for more videos: www.youtube.com/solutionsnerds Python – Guido Van Rossum Guido van Rossum was a Dutch programmer born January 31 January 1956. He is known as the author of the  Python programming language  which was initially released in 1991. The design philosophy that embodies Python emphasizes the code readability using significant whitespace. It also provides constructs that enable a clear programming on both small and large scales. Ruby – Yukihiro Matsumoto Ruby was developed by Yukihiro “Matz” Matsumoto,  a computer scientist and software programmer. It is an object-oriented, general-purpose programming language that was developed in the mid-1990s in Japan. Matz was born on the 14th day of April 1965. Matsumoto is the Chief Architect of Ruby at Heroku as of 2011. It is an online cloud platform-as-a-service in San Francisco. Java – James Gosling James Arthur ...

The listed laptop are chosen based on their specification and users review. for more videos: www.youtube.com/solutionsnerds Toshiba Portege Z30-C-138 The best laptop for programming CPU:  2.5GHz Intel Core i7-6500U |  Graphics:  Intel HD Graphics 520 |  RAM:  16GB |  Screen:  13.3-inch, 1920 x 1080 pixels |  Storage:  512GB SSD the Toshiba Portege Z30-C-138 is the best laptop for programming, as it features a fast processor, a large SSD and hefty 16GB of RAM. Best of all, it also manages 11 hours of battery life, which is ideal if you're looking for a laptop for programming and coding on the go. Toshiba has also managed to squeeze an extraordinary amount of components in this device including a VGA port, a fingerprint reader and even a 4G/LTE modem and A-GPS! Lenovo ThinkPad E470 A brilliant portable laptop for programming CPU:  2.7GHz Intel Core i7-7500U |  Graphics:  Intel HD Graphics 620 |...