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Your First LeetCode Journey: Conquering 'Two Sum' (Problem 1) with Ease! Hey fellow developers! 👋 Kushalx here, and today we're diving into the absolute cornerstone of algorithmic problem-solving: LeetCode's very first problem, Two Sum. If you're just starting your LeetCode adventure, this is the p
Pairs trading rests on a simple idea: find two assets that move together, wait for them to diverge, and bet on convergence. The hard part is defining "move together." Two commodity ETFs, EWA (Australia) and EWC (Canada), show a 0.95 correlation over a multi-year window. A mean-reversion trader sees
For context: in the previous piece, I worked through a five-dimension review framework for documentation, covering clarity, readability, style, completeness, and technical accuracy. Those dimensions are now part of how our team's AI agent reviews PRs. It runs them on every review pass, quietly, in t
Roadmap Position: Stage 0 → Module 1 of 5 Prerequisite: None — this is where everything begins Next Module: 0.2 — Operating System Fundamentals Estimated Study Time: 2–3 days of focused study + hands-on practice Most cybersecurity courses rush past hardware. They hand you Kali Linux and say "start h
E-commerce client runs an automation that sends personalized coupon emails. The coupon code comes from a "coupon bank" DE - prebuilt batch of codes, each used once. When the bank empties, emails ship with %%CouponCode%% rendered as blank. Customers receive a coupon email with no coupon. Fixing it af
The easiest way to think about it is: Predicate = Watch for something Effect = Do something when it happens Example: predicate: Is someone entering the building? effect: Check their ID Example 1: Add Item To Cart // cartSlice.ts import { createSlice, PayloadAction } from '@reduxjs/toolkit' interface
The OWASP Top 10 (2025): 10 Ways Developers Are Handing Attackers the Keys Every major breach you've read about in the last five years? It was probably on this list. The OWASP Top 10 is updated every few years. It is not theory. It is a leaderboard of the most exploited vulnerabilities in production
The Problem We Were Actually Solving We had a high-traffic server running our treasure hunt engine, a complex system that needed to scale quickly to handle sudden spikes in user activity. At the time, we were seeing latency degrade significantly once we passed the initial load, causing user experien
If you're building a multi-tenant SaaS, this is the first real architecture decision that will haunt you if you get it wrong. Option A: Shared schema with row-level security (RLS) Every tenant's data lives in the same tables. A tenant_id column on every -- Enable RLS on the table ALTER TABLE orders
A few weeks ago, I was trying to find an old Claude Code session where I had built a small automation script. I remembered the idea. But finding it? Impossible. Just endless chat history. That’s when I had a stupid but fun idea: What if my chats looked like Sword Art Online’s Aincrad instead of a si
Building a generative AI application is easy; building one that is both blazingly fast and rigorously accurate is a completely different beast. Recently, as part of Challenge 2 for the Google Cloud Gen AI Academy (APAC Edition), I was tasked with moving beyond simple prompting and diving deep into S
Mid-market distributors adopting Business Central often ask the same question at the end of a customization project: should the work be shipped as a per-tenant extension, or productized as an AppSource app to sell to similar distributors? The technical work is almost identical. The ALM, support mode
The Most Underrated Announcement from Google I/O 2026 Was Buried in a 90-Second Demo Google I/O Writing Challenge Submission S M Tahosin May 21 #discuss #googleiochallenge #devchallenge #python 27 reactions comments 6 min read
AWS has recently made its managed Model Context Protocol (MCP) server generally available, giving AI coding agents controlled access to AWS APIs, documentation, and operational workflows through a standard interface. It provides a safer and more auditable way to connect AI agents to AWS services wit
Welcome to Episode 4 of "Sunday Source". Today’s villain? Errors in the JavaScript Console. That scary red text developers pretend they understand instantly. And honestly, console errors are one of those things every developer eventually becomes friends with. Not because we want to… but because Java
In 1985, the best computer a reasonably affluent American could buy was the IBM PC AT, which cost $19,400 in today’s money. Today, a Tecno Spark Go costs $30 in a Nairobi market stall and runs a processor billions of times faster. No other good in history has experienced a cost decline on that scale
