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...

  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.

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 ...