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Gopi Gorantala

Hello 👋,

I am Gopi, an engineering leader with 13+ years of experience in backend and frontend development. A specialist in Java-based technology stack. I worked in India and European countries for multiple startups, the European government, and technology giants.

I've mostly taught myself and lived as a Digital Nomad. This site contains my learnings, experiences, tools, etc. My written notes covers the most trending software topics.

Featured Posts

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Mastering Arrays For Coding Interviews in Java

Arrays are fundamental data structures in computer science and serve as building blocks for complex ones.

Mastering Arrays For Coding Interviews in Java
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How To Prevent cannot read property map of undefined

The "cannot read property map of undefined" error occurs when we try to call the map method on a variable that stores an undefined or null value.

How To Prevent cannot read property map of undefined
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How can I remove a specific item from an array in JavaScript?

Removing a specific item from an array is the most use case a developer runs into. You will learn more than 7 ways to achieve this.

How can I remove a specific item from an array in JavaScript?

Recent Posts

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Control Statements In Java

Introduction When you write code or a program, the program executes the blocks in the order in which they appear from top to bottom. Control flow statements help break up this execution flow by providing decision-making, looping, and branching capabilities, allowing your program to execute specific code blocks conditionally. In

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Printing To The Console in Java

Introduction Printing something on the console or panel that displays important messages, such as errors, messages, or data outputs, directly for developers. In Java, you can print to the console using the System.out.println() method. Here's a simple example: System.out.println(100); prints 100 on the

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Leetcode 217: Contains Duplicate

This question marks the first problem when working on duplicate data, either integers or strings etc. Companies that have asked this in their coding interview are Amazon, Apple, Netflix, Google, Microsoft, Adobe, Facebook, and many more top tech companies. Problem statement Given an integer array nums, return true if any

Leetcode 217: Contains Duplicate
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Leetcode 121: Best Time To Buy and Sell Stock

The Best time to buy and sell stock problem is a classic problem that can be solved using the Greedy approach. This is one of the most popular questions asked in such interviews. Companies that have asked this in their coding interview are Facebook, Amazon, Apple, Netflix, Google, Microsoft, Adobe,

Leetcode 121: Best Time To Buy and Sell Stock
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Blind 75 LeetCode Problems: Detailed Solutions

💡More problems are on the way. Blind 75 is a curated collection of 75 coding problems commonly used by fast-paced startups and the top 1% of companies. List gained popularity among software engineers for tech interviews, especially at Google, Amazon, and Facebook (Meta). Arrays 1. Two Sum 2. Best Time