Every time you call a GPT or Claude API, you’re paying by the token. But what exactly is a token, and how do you estimate token counts without load…
Posts for: #Http
SVG Optimizer Implementation: From Regex to Performance
Working on an icon library project, I noticed exported SVG files were often 50KB+. After optimization, they shrank by 60%. But manually uploading a…
Responsive Testing Tool: iframe Sandbox and Device Simulation
Testing responsive designs usually means switching devices in Chrome DevTools or opening multiple tabs. I built a responsive testing tool that cons…
Building a Visual Regex Generator: From Zero to Match
Regular expressions are powerful but notoriously hard to remember. Even experienced developers need to look up syntax for email validation or IP ma…
Regex Cheatsheet: From Syntax Classification to Search Filtering
Regular expressions are essential for developers, but the syntax is complex and hard to memorize. A well-designed regex cheatsheet helps you find t…
From PX to REM: Unit Conversion in Responsive Design
I inherited a legacy project with hardcoded px values everywhere. The product team wanted user-customizable font sizes. I opened the CSS files—2,…
Building a Perfect Maze Generator with DFS Recursive Backtracker
Maze generation is one of those problems that looks simple until you actually implement it. I recently built an online maze generator on [JsonKit](…
Linux whois Command Deep Dive: From Domain Registration to Network Asset Investigation
When troubleshooting a domain ownership issue, I first encountered the whois command. This simple tool hides the entire design philosophy of the …
Linux uname Command: The Swiss Army Knife for System Information
Deep Dive into Linux mkdir Command: Directory Creation Art and Performance Optimization
Original link: https://jsokit.com/tools/linux-commands/mkdir