The Daily Index — Thursday, February 6, 2025 · TLDR Index

ARTICLES & TUTORIALS

TLDR Web Dev

TLDR Web Dev

DURABLE OBJECTS CALLBACKS ARE WEIRD

Durable Objects Callbacks are a novel "static callback" pattern for Durable Objects in Cloudflare Workers. They solve the problem of long-running asynchronous operations needing human interaction by decoupling callbacks from their initiating functions. This allows Durable Objects to sleep and be awakened by events like alarms, webhooks, or emails.

sunilpai.dev · 4 min

TLDR Web Dev

AVOIDING `ANY`S WITH LINTING AND TYPESCRIPT

Using `any` in TypeScript removes type safety and can lead to hidden errors, but people often use it anyway. It's a good practice to enable ESLint rules to avoid `any` from sneaking into a TypeScript codebase and use the unknown type as a safer alternative to it.

typescript-eslint.io · 9 min

TLDR Web Dev

7 PROVEN MENTAL MODELS FOR ENGINEERING MANAGERS

There are seven mental models - Inversion, Inertia, Second-Order Thinking, Entropy, Hanlon's Razor, Bottlenecks, and Activation Energy - that can help engineering managers make better decisions and avoid costly mistakes. This post explains each model along with real-world examples. For example, inversion means to invert a problem to look at it from the opposite perspective, such as thinking about what you don't want in an engineer when hiring.

zaidesanton.substack.com · 9 min

TLDR Web Dev

ZIG; WHAT I THINK AFTER MONTHS OF USING IT

After using Zig for a few months, this developer likes Zig's arbitrary-sized integers, type-level functions, and C interoperability. However, the downsides of using it include a lack of good memory safety guarantees and a lack of features like traits and destructors. While Zig improves upon C, it still has a ways to go to be production-ready.

strongly-typed-thoughts.net · 31 min

TLDR Web Dev

GEMINI 2.0 IS NOW AVAILABLE TO EVERYONE

Google DeepMind has announced the general availability of Gemini 2.0 Flash. It also released an experimental version of Gemini 2.0 Pro, its best model yet for coding and complex prompts, and a cost-efficient model, Gemini 2.0 Flash-Lite.

blog.google · 3 min

TLDR Web Dev

I SPENT FIVE YEARS BUILDING A WEB APP, POSTED IT ON HACKER NEWS, AND GOT MY FIRST $1

This developer spent five years developing a minimalist music composition web app. After many redesigns and optimizations, he finally launched it on Hacker News, which gained some traction and earned him his first dollar.

codingcafe.jp · 12 min

TLDR Web Dev

THE END OF SEARCH, THE BEGINNING OF RESEARCH

As AI learns to reason more and AI agents become more prevalent, these systems can now conduct in-depth research and solve deeper problems. For example, Google and OpenAI both have a Deep Research feature, which asynchronously grabs multiple sources, parses them, analyzes them, and outputs a report based on what the user requested.

oneusefulthing.org · 11 min

TLDR Web Dev

REACT QUERY - THE BAD PARTS

A slide deck on the tradeoffs made when choosing React Query, such as it having a large bundle size.

tkdodo.eu · 1 min

TLDR Web Dev

FEATURE: DOM STATE-PRESERVING MOVE

A new DOM `moveBefore` primitive added to the latest version of Chrome (133) allows elements to be moved within a DOM tree without losing their state, preserving features like iframe content, focus, and active CSS transitions.

chromestatus.com · 1 min