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Bite-sized, battle-tested engineering tips — with runnable code, diagrams and challenges.

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Next.js Medium

Next.js App Router: Server Components vs Client Components

Server Components run only on the server; Client Components hydrate in the browser. See how Next.js App Router renders both, and when to actually reach for 'use client'.

Next 14.x - 15.x React 18.x - 19.x

Diagram

3 min read · 29 Read tip

JavaScript Medium

Debounce vs Throttle in JavaScript: Control How Often Code Runs

Scroll, resize, and keystroke events fire dozens of times a second. Learn how debounce and throttle rate-limit them — and which one to reach for.

JavaScript ES6+

Diagram

2 min read · 87 Read tip

Database Medium

Database Indexes: Turn a Full Scan Into an Instant Lookup

See why a query without an index scans every row, how an index turns it into a fast lookup, and how to read EXPLAIN to tell the difference.

SQL ANSI / MySQL 8+

Diagram Try the challenge

2 min read · 801 Read tip

PHP Easy

Preventing SQL Injection in PHP

Learn essential techniques to protect your PHP applications from SQL injection attacks.

PHP 8.0+

Diagram Try the challenge

2 min read · 97 Read tip

DevOps Medium

Docker Multi-Stage Builds for Smaller Images

Reduce your Docker image size dramatically using multi-stage builds.

Docker 20.10+

Diagram Try the challenge

2 min read · 1,151 Read tip

PHP Medium

PHP 8.4 Property Hooks Explained

Discover the new property hooks feature in PHP 8.4 that provides a cleaner way to add logic to property access.

PHP 8.4

Try the challenge

1 min read · 371 Read tip

Laravel Medium

Laravel Query Optimization with Eager Loading

Learn how to optimize database queries in Laravel by using eager loading to prevent N+1 query problems.

Laravel 11.x PHP 8.2+

Diagram Try the challenge

2 min read · 675 Read tip

JavaScript Easy

JavaScript Async/Await Best Practices

Master async/await in JavaScript with these best practices and common pitfalls to avoid.

JavaScript ES2017+

Diagram Try the challenge

1 min read · 1,054 Read tip