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News
The Illusion of String.length: How to safely count Unicode, Emojis, and Words in JS
32+ min ago (173+ words) If you are building a text input that restricts users to a specific character limit (like a tweet, an SMS gateway, or an SEO meta tag), your first instinct is probably to use String.prototype.length. If you are doing…...
Make Fully Customizable QR Codes (Actually)
27+ min ago (28+ words) Tired of usual bland QR codes that don't show off your brand? I made a simple API to create fully... Tagged with python, api, backend, tools....
Distributed Locks
58+ min ago (110+ words) One-liner: A distributed lock ensures that only one node in a cluster can perform a critical operation at a time — preventing race conditions across services. In a single-server world, a mutex or semaphore handles concurrency. But in distributed systems: Classic…...
Three things that bit us moving a document scanner fully into the browser
1+ hour, 2+ min ago (596+ words) I work on LensUp, which does exactly that — the whole pipeline runs in the tab, and files are never uploaded. Disclosure up front: it's our tool, and this post is about the parts that were harder than the pipeline itself....
Ecualizador de Audio online
58+ min ago (20+ words) Hola buen día me gustaría compartir este pequeño proyecto con todos la verdad es que no soy... Tagged with webdev....
Your First AWS Production Architecture: From a Simple Application to a Scalable System
1+ hour, 12+ min ago (1081+ words) Most people learn AWS by studying individual services. RDS is a database. But that's not how AWS is used in the real world. In a real project, these services work together to solve one problem: How do we run an…...
gh api --paginate --slurp --jq 'length' Counts Pages, Not Issues
1+ hour, 10+ min ago (415+ words) gh api --paginate --slurp --jq 'length' is the command everyone reaches for to count issues in a repository. It does not count issues. It counts pages. I found this while writing pagination recipes for a toolkit, and then found the…...
Someone Force-Pushed Over main. Here Is the Reflog Nobody Knows They Have.
1+ hour, 10+ min ago (423+ words) A colleague pushed a fix to main. Ten minutes later you amended a commit message and ran git push --force. Their commit is no longer reachable from any branch on the server. This is the one Git command that can…...
EC2 Instance Unreachable via SSM Session Manager
1+ hour, 38+ min ago (595+ words) This runbook resolves the situation where an EC2 instance is running and visible in the console but either does not appear in the Systems Manager Fleet Manager inventory, or returns a connection error when you attempt to start a Session Manager…...
I built a radio station with one listener, and it runs in a terminal
1+ hour, 26+ min ago (638+ words) The film above is 86 seconds, and the middle of it is a real on-air moment. There is a longer unedited recording at the top of the repo README. Watch either first, with the sound on. The rest of this post…...