Small, focused notes on things I pick up while building — too short for a full blog post.
TypeScript projects get package.json — a place to write npm run lint once and reuse it forever. Most other ecosystems get nothing: the formatting, lint, seed, migrate, rollback, and cleanup commands y…
When a value is the output of branching logic, a const initializer feels out of reach — until you wrap the branch in a lambda and call it immediately. An IIFE (immediately invoked function expression)…
To compress a folder you first bundle it into a single file (tar), then compress that file (xz) — which naively means juggling three artifacts: the folder, the intermediate .tar, and the final .tar.xz…
From a Rustlings traits exercise: two impl Trait arguments look like they share one bound, but each occurrence is a separate generic parameter.
In my LeetCode grind each solution file is self-contained: the function, its unittest cases, and an if name == "main" block that runs the tests — so uv run solution.py runs that file's suite. With a f…
When a function must branch on a command string, an if/elif tree grows one branch at a time and the dispatcher bloats. The dispatch pattern replaces the tree with a registry: a command → handler mappi…
A progress bar doesn't draw a new line per tick — it rewrites the same line over and over. The trick is the \r escape sequence: a carriage return that resets the cursor to the start of the current lin…
rm does not erase your file from disk. Neither does mv "move" your file. Both work on the filesystem's index — the metadata that says "this name points at this data" — which is why deleting a folder w…
Since Python 3.10 you can wrap the context managers of a with statement in parentheses, so several resources share one block instead of nested with blocks. Same cleanup semantics, flatter code.
FastAPI and Pydantic both read Annotated metadata, merge it into the OpenAPI spec, and Orval turns that spec into a complete typed client. Write the contract once; get validation on the backend and a…
The best résumé workflow I've found: give an AI agent your raw material and let it write the LaTeX. You paste the result into Overleaf, it compiles to PDF, and you download it. No word processor invol…
Stop all running containers in one command using nushell's splat operator:
Nushell's sys command exposes system info as structured data, so you can query it with filter syntax instead of scraping text out of ip addr or ifconfig with awk/grep.
Redis is the usual answer for job queues, but Postgres has a built-in pub/sub mechanism — LISTEN/NOTIFY — that covers simple worker patterns without adding another piece of infrastructure.
Stop duplicating state between the URL and component state. With TanStack Router + TanStack Query, the URL search params are the state, and the router turns any change into a data reload.