Python Decorators Explained With Real Code
Functions that take functions and return functions. That's the whole trick.
Real working examples for Python, TypeScript, React, Next.js, Rust, Go, SQL, Postgres, Git, and VS Code. No pseudocode. No magic incantations. Copy, paste, run.
Read the cornerstone posts Browse languages10 deep-dive verticals. Each hub has tutorials, comparisons, and field notes — every code block tested in a real REPL.
Pythonic patterns, performance, packaging, async, type-hints. Real working examples for builders.
// typescriptTS strict mode, narrowing, the satisfies operator, conditional types — typed code that survives prod.
// reactHooks, Server Components, suspense, performance — modern React patterns for 2026.
// nextjsApp Router, RSC, server actions, edge runtime — shipping with Next 14+.
// rustBorrow checker, lifetimes, async, error patterns. Mental models for moving past the fight.
// goIdiomatic Go, error handling, goroutines, channels, modules — production patterns.
// sqlWindow functions, CTEs, indexing strategy — query patterns that scale.
// postgresJSONB, partial indexes, EXPLAIN, MVCC — the 80/20 of high-performance Postgres.
// gitRebase, cherry-pick, bisect, reflog — the workflows working developers actually use.
// vscodeExtensions, settings, multi-cursor, snippets — IDE setup for serious work.
Hand-picked deep dives that pay off if you read them carefully.
Functions that take functions and return functions. That's the whole trick.
satisfies validates without widening — and it catches half the bugs in modern TS.
RSC is a network protocol pretending to be a component model.
Three ideas. If you've been fighting the compiler, you're missing one of them.
Four index types fix nearly every slow query you'll write.
The choice depends on what you want your log to look like in two years.
Long-form pieces. Read them once a year.