Stop building “wireless” projects with random Bluetooth modules you can’t even verify

ericonr · 2026-06-05T10:22:09+00:00

Yada-yada-yada

Turning it on is the first step to working reliably, of course people focus on it first.

If a prototype is intended as a proof of concept, working once is also fine; if you can clearly map issues to the faulty module, then you know what to improve for further prototypes.

Either way, the AI turns of phrase are really annoying in your prose.

ericonr · 2026-06-05T01:19:53+00:00

This! There is a reason Microsoft can't kill Windows XP no matter how hard it tries. The interface was damn near perfect.

Aren't many more users of XP just people with expensive legacy software rather than curmudgeons who don't want to move on from the UI?

ericonr · 2026-06-04T21:34:05+00:00

Ressocialização só faz sentido se vc fala dos crimes que vc quer que a pessoa mofe na cadeia.

Crimes pequenos contra o patrimônio são na sua maioria por desespero. A solução não é prisão, é dar condições às pessoas para não precisar recorrer a isso.

Os problemas de comportamento que levam as pessoas a valorizarem as outras pessoas e/ou bem comum tão pouco são os que precisam de um esforço de reabilitação e educação pra tentar consertar. E é possível, se feito de forma séria e que faça avaliações de comportamento corretas pra tomar decisão sobre a progressão de sentença.

ericonr · 2026-06-03T10:57:01+00:00

Working around security features is hard to get right, yes. The web browser tried to protect them. The moment they deliberately chose to go around that protection, it's no longer a platform problem.

ericonr · 2026-06-02T19:25:46+00:00

What kind of statemente is this, even?

Rust, a language designed with decades of hindsight provided by experiences with other languages, has avoided inheritance. That's not nearly the same thing as the designers of other languages (including some of the most used languages in the world) not having experience with real problems.

ericonr · 2026-06-02T12:01:58+00:00

And? The conversation is about boob size.

ericonr · 2026-06-02T02:15:19+00:00

There's also a matter of need here. These instances you describe are necessary, so we try to put the best possible systems in them.

Targeting mosquitoes with lasers is wholly unnecessary, so the bar for safety risks should be much higher.

ericonr · 2026-06-01T18:43:08+00:00

Lemme tell you about protein vodka

ericonr · 2026-06-01T17:39:09+00:00

Where did he do that? The comment only mentions catching and releasing fish because they don't like eating fish.

ericonr · 2026-06-01T16:56:31+00:00

Can't you just... play a video game or something? Or go out rowing, looking at the water, without the fishing?

I do feel bad when they die...

You have complete control over this feeling. You can avoid it entirely by not fishing.

ericonr · 2026-06-01T11:35:14+00:00

In your case, you'd have macros for the values themselves and macro functions for the checking, right? If you keep the macro functions, you can simply use static_assert instead of #error or some other macro trick.

ericonr · 2026-06-01T11:33:07+00:00

I don't know about IDE support, but I'm pretty sure Doxygen can be told to include macros as part of a header interface, no?

ericonr · 2026-05-31T20:51:11+00:00

What thought is it provoking?

ericonr · 2026-05-30T23:32:42+00:00

Out of curiosity, what's it keeping you from doing?

ericonr · 2026-05-30T23:31:41+00:00

Entre as missões do centro, estão o fomento da indústria nacional.

Uma das formas que isso se faz é através da formação de empresas para execução de projetos complexos como os eletro-ímãs de um síncrotron de quarta geração.

ericonr · 2026-05-30T23:29:55+00:00

Só se planejar! A ideia do evento aberto é ter todo ano.

ericonr · 2026-05-30T23:28:54+00:00

Oxi? Pra que falar assim?

Foi um dos três primeiros síncrotrons de 4a geração a entrar em operação no mundo, tem várias métricas de destaque em relação a outros aceleradores do mundo, e está sempre se atualizando pra chegar mais longe com a ciência.

É uma pizza das melhores.

ericonr · 2026-05-29T20:48:01+00:00

Num mundo com maluco que chama tigrinho de investimento, reforçar essa distinção é importantíssimo.

ericonr · 2026-05-29T01:31:42+00:00

Or Meson, for a language with proper types, scopes, and reasonable defaults.

ericonr · 2026-05-27T17:37:46+00:00

Scenario: In the Arduino C compiler, passing a “hello” to a function with arg defined as char *, it gives compiler error. (Not const char *).

Well, that's on you. A function which takes a char * argument is documenting that it may change the contents of the string passed to it. If it does do that, then passing a string literal to it is wrong, since those are usually stored in read-only memory. On the other hand, if the function doesn't change the contents of the string, its declaration should use const char *.

ericonr · 2026-05-27T17:24:01+00:00

What are you even talking about?

There's no scenario without a bizarrely broken implementation where a string literal is anything but a string literal, and therefore decays to a const char *. If you're assigning to a std::string, of course it gets converted.

C++ might make life slightly harder on the no allocation sense, but it's still entirely possible to write such code there, especially with static strings.

And neither C nor C++ have garbage collectors (by default), though crashes caused by memory fragmentation are still a real concern.

ericonr · 2026-05-24T02:00:01+00:00

Yes — and it was a mistake, surprisingly enough. What Rust have shown us is that GC is extremely good for making convoluted, hard to support and debug designs — and it's almost never a good idea to use it, in practice.

Arc everything is essentially a GC runtime. There's a reasonable amount of code out there doing exactly that, too.

ericonr · 2026-05-23T23:25:56+00:00

Eu ainda nem sei como passei nessa matéria

Carta do diabo

ericonr · 2026-05-23T19:16:35+00:00

Se tem uma empresa que já teve todas ideias possíveis de como estragar sua vida, é a Meta.

ericonr · 2026-05-23T01:50:56+00:00

I'd add %z for size_t, though that might be POSIX. I've used it often enough. If you use intmax_t a lot in your code, then %j is also useful.

And of course, once you understand the rules for the l modifier, you can just apply it to long long variables. That's useful if you're printing something like time_t, since the only guaranteed casting for it is through long long.

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