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@ardislu
ardislu / garbageCollection.js
Created September 21, 2025 06:33
The minimal logic to block until garbage collection occurs in JavaScript.
/**
* Helper function that will block until garbage collection is performed.
*
* **WARNING:** By design, JavaScript garbage collection is unpredictable and may never happen (i.e., this
* function may never resolve). Use this function with caution.
*/
async function garbageCollection() {
const { promise, resolve } = Promise.withResolvers();
const registry = new FinalizationRegistry(resolve);
(() => registry.register({}, ''))();
@ardislu
ardislu / minimal-webauthn-prf.js
Last active July 31, 2025 07:35
Minimal boilerplate JavaScript code to use the pseudo-random function extension (prf) of the Web Authentication API.
/**
* =================================================== IMPORTANT ===================================================
*
* The passkey creation and retrieval MUST occur in the same "effective domain" or "registrable domain suffix"
* ([more info](https://www.w3.org/TR/webauthn-3/#rp-id)):
*
* > For example, given a Relying Party whose origin is `https://login.example.com:1337`, then the following
* > RP IDs are valid: `login.example.com` (default) and `example.com`, but not `m.login.example.com` and not `com`.
*
* As a result of this restriction, data encrypted with a crypto key that was derived from a passkey's PRF extension
@ardislu
ardislu / winget-slow-extract.md
Last active June 18, 2025 05:13

How to fix winget taking a long time to extract archive

Problem

Using winget to install programs with large archives (e.g., zig.zig) takes a long time and appears to hang:

PS> winget install zig.zig
Found Zig [zig.zig] Version 0.14.0
This application is licensed to you by its owner.
@ardislu
ardislu / wslg-usage.md
Created February 14, 2025 06:47

Modern versions of WSL2 can run GUI applications out of the box via WSLg.

  1. Install desired GUI application:
sudo apt install nautilus -y
  1. Run it:
@ardislu
ardislu / webStreamsQueuingStrategy.js
Last active March 19, 2025 05:44
Demonstration of queuing strategy for Streams API
// Demonstration of queuing strategy for Streams API
// $ node ./webStreamsQueuingStrategy.js
export { }; // Intentional unused export to force "type: module" on .js file
// These strategies are equivalent
const basicStrategy = {
highWaterMark: 3, // If no .size() specified, default is .size() === 1 (CountQueuingStrategy)
// size(chunk) { return 1; } // Implied
};
@ardislu
ardislu / getPseudoRandomValues.js
Last active January 3, 2025 06:47
Simple, small, and fast pseudorandom number generator to deterministically generate large amounts of mock test data.
/**
* Simple, small, and fast pseudorandom number generator to deterministically generate large amounts of mock test data.
*
* API is intended to follow [`crypto.getRandomValues()`](https://developer.mozilla.org/en-US/docs/Web/API/Crypto/getRandomValues).
*
* Hash function source:
* - https://burtleburtle.net/bob/hash/integer.html
* - https://web.archive.org/web/20090408063205/http://www.cris.com/~Ttwang/tech/inthash.htm
* @param {ArrayBufferView<ArrayBufferLike>} typedArray An integer-based `TypedArray` with a byte length that is a multiple of 4.
* All elements in the array will be overwritten with random numbers.
@ardislu
ardislu / git-commit-date.md
Created November 26, 2024 08:33

How to change your last git commit's CommitDate and AuthorDate

  1. Show the last git commit and confirm it's the one you want to edit:
$ git log -n 1 --pretty=fuller
commit 0000000000000000000000000000000000000000 (HEAD -> main)
Author:     First Last <[email protected]>
AuthorDate: Tue Nov 26 01:01:01 2024 -0800
Commit: First Last
@ardislu
ardislu / debounce.js
Created September 13, 2024 02:28
Minimal debounce function and example in JavaScript.
// Minimal debounce function:
function debounce(fn, wait) {
let timeoutId;
return (...args) => {
clearTimeout(timeoutId);
timeoutId = setTimeout(() => fn(...args), wait);
}
}
// Minified:
@ardislu
ardislu / unexpected-overloads.md
Created September 3, 2024 08:49

Beware unexpected overloading in JavaScript array functions

What's the difference between these two?

['1', '2', '3'].map(n => parseInt(n)); // Function 1
['1', '2', '3'].map(parseInt); // Function 2

Let's see the output:

@ardislu
ardislu / minimal-form-values.html
Last active September 1, 2024 23:43
A minimal example of the most concise way to get the values from a vanilla HTML `<form>` element and assign the values to JavaScript variables in 2024. Notice that the object keys are based on the `<input>`'s `name` attribute and not `id`.
<form>
<input name="ex1">
<input name="ex2">
<input name="example-with-hypens">
<button>Submit</button>
</form>
<script>
document.querySelector('form').addEventListener('submit', e => {
e.preventDefault();