Collection of tutorials, essays and articles about things I've learned along the way. urn:uuid:0623df77-4f14-442d-a72b-e7fd2f4ac96a 2026-05-10T17:58:47.599Z urn:uuid:de1858fd-52c8-49e9-a6fe-b5d1ac13a01e 2026-05-08T14:42:55.477Z 2026-05-08T14:42:55.477Z

An essay about the past AI-promises-era and how we got here in the first place

Valeria Viana Gusmao mail@valeriavg.dev urn:uuid:c71dad8a-6e20-46c4-8cad-e36f953043d8 2025-10-27T17:08:31.154Z 2025-10-27T17:08:31.154Z

Transitioning from an individual contributor to a leader is not easy. Why would it be? One day you are the hero doing all the work, the next day you are expected to guide others to do it for you. I wish I had the knowledge I have now when I was starting out as a manager. Perhaps this article will help you avoid some pitfalls I dug myself into.

Valeria Viana Gusmao mail@valeriavg.dev urn:uuid:1ea95260-9437-11ef-af43-558f8bb50797 2024-10-20T15:58:56.330Z 2024-10-20T15:58:56.330Z

HTML comes with a lot of ready to use and flexible elements, but date selector has a handful of limitations and the need to write your own calendar / date input emerges sooner rather than later. In this tutorial I'll walk you though implementing a calendar view and show how you can extend its functionality to fit your booking widget or dashboard filter

Valeria Viana Gusmao mail@valeriavg.dev urn:uuid:1ea64520-9437-11ef-af43-558f8bb50797 2023-06-27T16:24:13.000Z 2023-06-27T16:24:13.000Z

A new project is always a joy: the code hasn't yet been bloated with deprecated features, rushed decisions and questionable dependencies. When my projects get to this state I become increasingly less productive and the urge to refactor grows exponentially, which, as you would imagine, halts any progress entirely.

Valeria Viana Gusmao mail@valeriavg.dev urn:uuid:1eac1180-9437-11ef-af43-558f8bb50797 2022-09-24T09:13:15.000Z 2022-09-24T09:13:15.000Z

There was a time when creating a web page meant creating an html file, yet nowadays it seems impossible to build any frontend without the bottomless pit of node_modules, yielding a finely chewed yet hefty bundle.xyz.js. Well, I got to learn that it might not be the case soon and, naturally, I feel the urge to share it with the rest of you.

Valeria Viana Gusmao mail@valeriavg.dev urn:uuid:1ea88f10-9437-11ef-af43-558f8bb50797 2022-09-08T04:56:49.000Z 2022-09-08T04:56:49.000Z

I first heard of React when a friend showed me a project he had written. It was some sort of content management system: it had tables, forms, visual editors and stuff like this. I don't remember much, except that code was really really confusing

Valeria Viana Gusmao mail@valeriavg.dev urn:uuid:1eac5fa0-9437-11ef-af43-558f8bb50797 2021-12-06T15:58:52.000Z 2021-12-06T15:58:52.000Z

They say Go is the language of the web. Of course, with Google backing it up it sounds very objective! But is it as good as they say? I can think of cases where it wouldn't be a good fit

Valeria Viana Gusmao mail@valeriavg.dev urn:uuid:1e9ca830-9437-11ef-af43-558f8bb50797 2021-09-18T13:21:35.000Z 2021-09-18T13:21:35.000Z

It's been a long time since I got excited about a framework. I often advocate for reinventing the wheel, how come I'm writing an ode to a framework? Short answer because SvelteKit is very good, even though it's still in beta. The long answer is ahead.

Valeria Viana Gusmao mail@valeriavg.dev urn:uuid:1ea29ba0-9437-11ef-af43-558f8bb50797 2021-07-11T12:27:30.000Z 2021-07-11T12:27:30.000Z

Essentially, Git keeps tabs on text changes, but the definition is a version control system. Chances are you've already used git one way or another: it is a de-facto standard for code versioning due to it's distributed nature, as opposed to centralised Apache Subversion (SVN).

Valeria Viana Gusmao mail@valeriavg.dev urn:uuid:1ea70870-9437-11ef-af43-558f8bb50797 2021-07-07T20:49:55.000Z 2021-07-07T20:49:55.000Z

In this tutorial we'll build a cyclic redundancy check (CRC) hashing function. More specifically, its 32 bit variant called "CRC-32". I bumped into it in the PNG specification, but it's also used in Gzip and bunch of other formats and protocols. In short, it makes a tiny (4 bytes) hash out of whatever binary data you feed to it and changes significantly if data changes even slightly. Of course, such a tiny function is not even close to be crypto secure, therefore it's only used to check if data was transferred correctly.

Valeria Viana Gusmao mail@valeriavg.dev urn:uuid:1ea6e160-9437-11ef-af43-558f8bb50797 2021-06-13T08:37:41.000Z 2021-06-13T08:37:41.000Z

Binary is the very core of everything digital, not only in web development, but literally everything: from variables and file data to transport protocols and executables themselves.

Valeria Viana Gusmao mail@valeriavg.dev urn:uuid:1eac86b0-9437-11ef-af43-558f8bb50797 2021-06-05T09:25:36.000Z 2021-06-05T09:25:36.000Z

Events handling and promises in particular are hands down the best JavaScript feature. You're probably familiar with the concept itself, but in short, a Promise in JavaScript is a promise to call back with the result.

Valeria Viana Gusmao mail@valeriavg.dev urn:uuid:1ea47060-9437-11ef-af43-558f8bb50797 2021-02-21T13:49:13.000Z 2021-02-21T13:49:13.000Z

There are quite a few cases where you can benefit from importing an arbitrary file directly: in universal apps, tests, or simply to avoid boilerplate. Good news: you don't need Babel, Webpack, or anything else for it.

Valeria Viana Gusmao mail@valeriavg.dev urn:uuid:1ea5a8e0-9437-11ef-af43-558f8bb50797 2021-01-24T11:05:13.000Z 2021-01-24T11:05:13.000Z

JavaScript Number type would have been called double or float64 in a compiled language. Therefore, numbers have some limits

Valeria Viana Gusmao mail@valeriavg.dev urn:uuid:1ea61e10-9437-11ef-af43-558f8bb50797 2020-11-17T10:43:15.000Z 2020-11-17T10:43:15.000Z

If the best code is no code at all, then the next best thing is code, that you can explain in one simple sentence. For example, like this: Redis holds a variety of structures in memory and lets you manage them through a text based command protocol. Despite, or maybe, because of its simplicity, Redis has plenty of utility in modern web architecture.

Valeria Viana Gusmao mail@valeriavg.dev