Programming Tutorials

Introduction Java data types define the kind of data a variable can store. They help developers organize and process information correctly.

The page says students in a live classroom auction have seen different winning bids after reconnecting. An instructor's screen shows the latest accept

A marketplace import page should fire when scheduled imports stop producing results, not merely when the API process dies. TL;DR: use an external hear

What I notice I cannot stop my thoughts. Try it yourself. Set a timer for thirty seconds and think of nothing. A thought will arrive before

The dual-write problem shows up wherever a service needs to update its database and notify the outside world as one atomic step. The write succeeds an

TL;DR: Use StatusCake, Better Stack, or UptimeRobot for outside-in API checks and production notifications. Add Healthchecks for scheduled jobs that c

On 1 October 2026, Nigeria's postcode changed from six digits to an 11-character code that identifies a single building, such as EK-01-A03-FK-01. Lang

When upgrading an old Rails app, I want to know what will block the upgrade before I start changing versions. I built rails-preflight to find those b

Explore Gemini 4 Argon's Python code, turtle drawing, and responses to small tasks that check modern syntax, release knowledge, focused edits, and mad

Learn how to structure Python projects: pick between flat and src/ layouts, organize your code, and apply the patterns to CLI, web, and GUI apps.

Read More from Kido (Dương Phúc Khánh) 🌐 Official Engineering Hub: https://khanhdp.com 🏛️ Biography & Career Timeline: https://khanhdp.co

Somewhere in the first hour of reading about AI agents, you meet a diagram. A box labelled Thought, an arrow to Action, an arrow to Observation, and a

I run a visa agency in Bali. The half of my week that has nothing to do with visas goes into Apify Actors, and one of them is a transcriber: give it a

I built Portsmith to help reuse focused JS/TS features across repositories. It prepares changes in a copy, runs declared behavior checks and exports

This series covered the minimum steps for using Claude Code mods in the desktop app's Code tab, and answers to the problems people search for most. He

You need data out of a 200-page PDF because you want to feed a RAG pipeline, fill a database from contracts or filings, or ask questions that cross hu

Parsing Telegram Channels with Python: Telethon Basics Without Getting Banned Short answer: Telethon plus your own account, read-only calls

I’m a Student Developer Building an AI Learning Assistant Called Modi I've always been interested in technology, but I didn't want to spend

An invoice data extraction API takes an invoice as a PDF or image and returns structured JSON: header fields such as invoice number, vendor, dates and

Generating a bingo card looks like filling a grid, but the details show up as soon as users request different sizes, custom words, free centers, and m