Fingerprint minutiae by Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16
Biometrics by Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16
Human phenotype by Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16
A Conversation Between God and Man by Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16
Video 1.
A Conversation Between God and Man performed by Ding Chengyun
. Source.
Be a marginal, be a hero by Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16
This became a flag for the dissidents.
https://upload.wikimedia.org/wikipedia/pt/b/b6/Seja_marginal_seja_herói.jpg
United States Navy by Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16
Texas by Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16
Oregon by Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16
nodejs/next/ref-twice by Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16
This is a minimal reproducible example for the terrible problem of external effects applying twice to refs for effects that are not idempotent and thus blowup if applied twice.
The issue is currently discussed at: react.dev/learn/synchronizing-with-effects#step-3-add-cleanup-if-needed (archive) which says "you need to cleanup the thing yourself". web.archive.org/web/20240720100401/https://react.dev/learn/synchronizing-with-effects#subscribing-to-events is also says that for the specific case of addEventListener.
But that's annoying! Can't we just somehow tell if we applied twice or not to avoid having to implement a cleanup? What if a third party system does not provide a cleanup at all?
Is the correct solution to just just have a useEffect with empty dependency list? Seems to be good according to posts and to ESLint!
nodejs/next/posts by Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16
The goal of this example is to understand when states and effects happen when changing between different routes that use the same component.
Behavior is follows:
This is likely because in React the state kept in the virtual DOM structure, and identical structure implies identical state. So when we change from post 1 to 2, we still have a Post object, and state is unchanged.
Next if we click:
then the count is back to 0. This is because we changed the Post object in the DOM to Index and back, which resets everything.
This example also illustrates how to prevent this from happening with useEffect.
react/ref-twice.html by Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16
Failed attempt at minimizing nodejs/next/ref-twice outside of Next.js.
Tempo Rei (documentary) by Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16
Very good documentary!
This is a documentary about Gilberto Gil going back to his homelnd for the first time since he emigrated to Salvador/Rio, with some of his most popular songs intermixed into it. Beautiful!
"Tempo Rei" is the name of a Song composed by Gilberto Gil.
Semantic triple HOWTO by Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16
React DOM manipulation by Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16
Web Ontology Language by Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16
Reasonable introduction: www.w3.org/TR/owl2-primer/
Example: rdf/vcard.ttl.
Implemented by:

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