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# Java Interview Preparation Roadmap for Freshers (0–3 Years)

Preparing for your first Java developer interview can feel overwhelming. There are so many topics to cover, including Core Java, OOP concepts, Collections, Exce…

🎉 New release of ECD++ 2026.9.1 is out!

Spring Data JPA Transactions and Queries

The last but not least part of my series of articles on Spring Data JPA guide, employing best practices to help you keep the code base clean and avoid common mi…

Floor plans that compile: byte-identical output, errors as data, and an access graph

Floor plans that compile I compiled the same floor plan twice and diffed the output: import { readFileSync } from " node:fs " ; import { createHash } from " nod…

Reproducible is not correct: defect classes a green test suite cannot see

Reproducible is not correct Here is a measurement you can reproduce in eight lines, plus a dozen-line helper. It is from the example plans that ship with my flo…

Developing a Web-Based GameBoy/GBA Emulator in TypeScript: Overcoming Processor and Audio Challenges

Introduction The GB.js project stands as a testament to the fusion of historical hardware emulation and modern web technologies. By developing a GameBoy and GBA…

Deploy a Next.js Template to Vercel Without Breaking Production

Your Next.js template works locally. Pushing it to Vercel breaks the build because your local .env.local isn't uploaded and preview deploys hit production APIs.…

Modelling missing values in a 6,500-cell table: Sri Lanka's university cut-offs

Every year the University Grants Commission (UGC) in Sri Lanka publishes a table of minimum Z-scores for university admission. Each row is a course at a univers…

I Built a Tool That Turns 40-Year-Old Banking Packets Into Modern APIs — Using Kiro

Every time you tap your card at a terminal, your payment travels through a binary protocol written in 1987. It's called ISO-8583. Banks run it on IBM mainframes…

Count tokens before you call OpenAI or Claude: the count tokens APIs in Next.js

You want to know how many tokens a request will use before you send it: to check it fits the model's context window, to estimate what it will cost, or to stop o…

Aontu says no clearly, but only when you ask it to

I'm a full-stack developer in Nairobi, and I recently took on two small tasks for Voxgig : build an open-source SDK with their SDK generator, then write a criti…

MCP servers stopped working in July 2026 — here is the exact change (with a working diff)

If you copied an MCP server example in the last year and it stopped working, you are not doing anything wrong. The protocol and the TypeScript SDK both changed,…

Vue.js com TanStack Query

Por que usar TanStack Query com Vue.js? A gestão de estado em aplicações frontend divide-se em Client State (modal aberto, tema escuro, formulários locais) e Se…

Samsung Wallet sends USDC on Solana. Here's a 40-line script that tells which chain an address is for

The news, briefly On November 5, 2026, Samsung Wallet launched stablecoin accounts for eligible U.S. Galaxy users. The account holds USDC on Solana . Users can …

The Seventeen Ways a Wall Can Repeat

I have been building a series of pages where the computer generates the pattern: tin-glazed tiles painted by rule , cut tile and poured cement , heraldry , knot…

🏗️ 1. WebGL2 GLSL 핵심 문법과 개념 정리

WebGL 보일러플레이트(HTML/JS)는 이미 구성되어 있다는 가정 하에, 셰이더 코드( vert.glsl , frag.glsl ) 자체에서 알아야 하는 문법과 개념만 다룹니다. 기준 버전은 WebGL2에서 사용하는 GLSL ES 3.00( #version 300 es )입니다. 1.…

Is the Supabase anon key safe to expose?

Practical checklist from ShipSafeStack . Not a penetration test, compliance audit, score, or proof that a project is safe. Informational only — no guarantees. S…

Five mistakes beginners make learning full stack JavaScript in Nepal

Most beginners who learn full stack JavaScript today do not get stuck on syntax, because AI tools write the syntax. They get stuck on where the code runs, who c…

Refunded or disputed, but the customer still has access? Your Stripe webhook only listens for the purchase

A lot of paywalls handle exactly one Stripe event. checkout.session.completed arrives, the handler sets paid = true , and that's the end of it. Nothing in the c…

How much does a Solana smart contract audit cost? Numbers by project size

Audit pricing is mostly effort: how many security engineers, for how many days. By the method used in our free audit cost calculator ($1,600-2,800 per engineer-…