Programming Tutorials

Here’s the story: last week my boss threw a “simple” task at me — pull data from 120 internal APIs simultaneously and compile a report. I thought, “Th

It happened last year when I was adding a “batch domain liveness check” feature to our internal operations platform. The requirement was simple: perio

Last Friday at 5 PM, right when I was about to close my laptop and sneak out, the alert channel exploded — the online data collection service had a ti

Last month, the data platform I maintain suddenly got a new requirement: run health checks against 100+ downstream services. Each endpoint averages 20

Here’s the situation: we have a data collection service that fetches data from a dozen upstream APIs. The synchronous version took a painful 30 minute

TL;DR Zod's .refine() executes on every input — even when earlier validators like .min() and .max() have already failed. If you place an ex

Last week I was building an internal monitoring tool that needed to fetch pages from over 200 websites concurrently. Our old synchronous script took m

This article was originally published on Jo4 Blog. We found three authentication bugs in production. Not from penetration testing. Not from a secur

This article was originally published on Jo4 Blog. Our OAuth implementation worked perfectly. Every test passed. Users authorized apps, got tokens,

ตอนที่ 2 ของบทความ "Concurrency ใน Go" เราจะมาพูดถึงวิธีการที่แนะนำให้ใช้สื่อสารกันระหว่างหลายๆ goroutine ซึ่งก็คือ Channel Channel แนวทาง

ตอนแรกของบทความ "Concurrency ใน Go" เราจะว่ากันด้วยพื้นฐานเกี่ยวกับ concurrency และ synchronization Concurrency vs Parallelism ก่อนอื่นมาท

I Built a Privacy-First Chrome Extension That Saves Your Forms Locally You're 800 words deep into a job application. Tab crashes. Refresh.

Advanced Techniques for Optimizing JavaScript Rendering Pipelines Introduction The rendering pipeline in JavaScript is a critica

Spring Batch Chunk Processing Explained with Examples A comprehensive guide to Spring Batch chunk processing, including examples and best

In a 2024 survey of 1,200 Next.js enterprise teams, 68% reported wasting 14+ hours per sprint debugging metadata applied via ad-hoc patterns instead o

273 Free React UI Components 2026 — No npm Install ProofMatcher offers 273+ free React components — copy-paste JSX, no package install, no

TL;DR: The resident set size on my finite element solver hit 8GB during a full run on a 10-million-node mesh. The working set — the actual data I wa

The Full Content In the fast-paced world of web development, JavaScript remains the engine that powers the modern web. Whether you are building intera

A 2MB gzipped JavaScript bundle is ~7MB for V8 to parse and compile. On a mid-range Android at 3G, that is 12 seconds before a single interaction is p

TypeScript 5.6 vs Python 3.13 for Backend APIs with PostgreSQL 17 Choosing the right tech stack for backend API development is a critical d