https://talktechie.com/TalkTechie is a tech blog covering Spring Boot, Kotlin, AI/ML concepts and practical tech tips for engineers. 2026-05-31T14:27:42+05:30 TalkTechie https://talktechie.com/ Jekyll © 2026 TalkTechie /assets/img/favicons/favicon.ico /assets/img/favicons/favicon-96x96.png 2026-05-30T00:00:00+05:30 2026-05-30T10:16:08+05:30 https://talktechie.com/posts/kotlin-dsa-series-index/ TalkTechie

A complete Data Structures & Algorithms series written in idiomatic Kotlin. Not Java translated to .kt — real Kotlin the way it’s meant to be written. 🟢 Phase 1 — Arrays LC # Problem Difficulty Post #1 Two Sum Easy Read → #121 Best Time to Buy and Sell Stock Easy Read → ...

2026-05-30T00:00:00+05:30 2026-05-30T10:16:08+05:30 https://talktechie.com/posts/kotlin-dsa-arrays-two-sum/ TalkTechie

Problem Info     LeetCode # 1 — Two Sum Difficulty Easy Topic Arrays, HashMap Given an array of integers nums and an integer target, return the indices of the two numbers that add up to target. Example: Input: nums = [2, 7, 11, 15], target = 9 Output: [0, 1] // nums[0] + nums[1] = 2 + ...

2026-05-30T00:00:00+05:30 2026-05-30T00:00:00+05:30 https://talktechie.com/posts/kotlin-dsa-arrays-contains-duplicate/ TalkTechie

Problem Info     LeetCode # 217 — Contains Duplicate Difficulty Easy Topic Arrays, HashSet Given an integer array nums, return true if any value appears at least twice. Example: Input: nums = [1, 2, 3, 1] Output: true Input: nums = [1, 2, 3, 4] Output: false Approach Use a HashSe...

2026-05-30T00:00:00+05:30 2026-05-30T00:00:00+05:30 https://talktechie.com/posts/kotlin-dsa-arrays-best-time-to-buy-sell-stock/ TalkTechie

Problem Info     LeetCode # 121 — Best Time to Buy and Sell Stock Difficulty Easy Topic Arrays, Greedy, Sliding Window Given an array prices where prices[i] is the price on day i, return the maximum profit from a single buy-sell transaction. Example: Input: prices = [7, 1, 5, 3, 6, 4] O...

2026-05-25T00:00:00+05:30 2026-05-26T00:02:22+05:30 https://talktechie.com/posts/post1-n-plus-one-problem/ talktechie

For most of my career, I wrote raw SQL. Not because I was stubborn about it — I just understood it. I knew exactly what was hitting the database. I could read the query, predict the result, and tune it when something was slow. There was no mystery. Then I moved to a project using Spring Data JPA. And I discovered that when you hand query control to a framework, the surprises come fast — espec...