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📰 Dev.to · Tim Nguyen

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All Articles 165,758 Blog Posts 158,312 Tech Tutorials 43,914 Research Papers 32,021 News 21,228 ⚡ AI Lessons

Unicode, UTF-8, UTF-16, surrogate pairs, and why JavaScript `length` lies

Dev.to · Tim Nguyen 🔧 Backend Engineering ⚡ AI Lesson 1mo ago

Unicode, UTF-8, UTF-16, surrogate pairs, and why JavaScript `length` lies

Introduction If you've ever written this in JavaScript: console.log("🐣".length); // 2...

You copied curl, using that to request to cloudfront through WAF and got strange error that request couldn't be satisfied? Here is what to concern...

Dev.to · Tim Nguyen 🔐 Cybersecurity ⚡ AI Lesson 3mo ago

You copied curl, using that to request to cloudfront through WAF and got strange error that request couldn't be satisfied? Here is what to concern...

Here is the day as usual, you got the bug report from FE team or QA about request can not be...

COUNT(column) vs COUNT(*) in SQL — With INNER, LEFT, RIGHT & FULL JOIN Explained

Dev.to · Tim Nguyen 📊 Data Analytics & Business Intelligence ⚡ AI Lesson 6mo ago

COUNT(column) vs COUNT(*) in SQL — With INNER, LEFT, RIGHT & FULL JOIN Explained

Counting seems simple in SQL… until joins enter the picture. One of the most common bugs...

PostgreSQL MVCC vs MySQL Key-Next Locking: How Transaction Isolation Affects Concurrency

Dev.to · Tim Nguyen 🔧 Backend Engineering ⚡ AI Lesson 8mo ago

PostgreSQL MVCC vs MySQL Key-Next Locking: How Transaction Isolation Affects Concurrency

When developers talk about ACID databases, two giants dominate: PostgreSQL and MySQL (InnoDB). Both...