pedrolins (u/pedrolins)

pedrolins commented on LinkedIn is loud, and corporate is hell ramones.dev/posts/linkedi... · Posted by u/austinallegro

pedrolins · 3 months ago

> How do these people stay motivated to do anything. It can't just be money, right?

It’s making money to spend quality time with loved ones and pay the bills. For some people that’s enough (no judgement).

pedrolins commented on CS234: Reinforcement Learning Winter 2025 web.stanford.edu/class/cs... · Posted by u/jonbaer

pedrolins · 3 months ago

I was excited to check out lecture videos thinking they were public, but quickly saw that they were closed.

One of the things I miss most about the pandemic was how all of these institutions opened up for the world. Lately they have been closing down not only newer course offerings but also putting old videos private. Even MIT OCW falls apart once you get into some advanced graduate courses.

I understand that universities should prioritize their alumni, but there’s literally no cost in making the underlying material (especially lectures!) available on the internet. It delivers immense value to the world.

pedrolins commented on Show HN: Free e-book about WebGPU Programming shi-yan.github.io/webgpuu... · Posted by u/billconan

pedrolins · 2 years ago

This is awesome! I’ve given up learning graphics programming in the past due to the fragmented ecosystem of libraries. It just felt overwhelming. This seems exactly what I’ve been missing.

pedrolins commented on Show HN: Autotab – An AI-powered Chrome extension to create Selenium scripts autotab.com/... · Posted by u/jonasnelle

pedrolins · 2 years ago

This is amazing!! I've found myself writing selenium scripts to automate tasks for my dad's job (things such as getting a name from a spreadsheet, putting that name in a website's search box and from there repeating the same actions for 100s of names) and saved him a ton of time. Making browser automation more accessible by just showing the machine how to do it will definitely make lots of people's lives easier. Can't wait to mess around with it.

pedrolins commented on Brazil's Embraer plans to build electric flying taxi factory near Sao Paulo bbc.com/news/world-latin-... · Posted by u/joak

epups · 3 years ago

Embraer makes some very interesting mid-sized commercial planes. This piece is light on details and the price range seems crazy optimistic - can you believe you would only pay 2x or 3x what an Uber charges to fly over a city? Nevertheless, seems like a promising concept.

pedrolins · 3 years ago

I was at a talk given by the president of Embraer-X (that's an Embraer subsidiary that looks into these riskier ventures), and he got into the details of how they validated their business plan of using these vehicles for urban transportation.

They offered helicopter rides to one of Rio's major airports and charged R$100 per passenger (according to him, that's an accurate estimate of future prices once they make their eVTOL) at a loss just to see if there was demand. They got booked the entire year in advance.

pedrolins commented on Advice to Aimless, Excited Programmers (2010) prog21.dadgum.com/80.html... · Posted by u/weird_user

pedrolins · 3 years ago

I have faced this myself, and the aimless excitement can create a lot of frustration in new programmers. Programming is a unique tool in the sense that it has the ability to glaringly show the programmer's lack (or wealth) of vision.

pedrolins commented on The Danger of Journaling Is Introspection bramadams.dev/projects/th... · Posted by u/_bramses

pedrolins · 4 years ago

I have been journaling for 2 years on and off. In the beginning it had extremely positive effects on my development as a person.

After a while the sense of effectiveness that came from writing constantly started to fizzle out and I'd feel like going in circles in my writing.For a while, I wouldn't write and I'd feel guilt and would attribute negative aspects of my life to my lack of writing, which led me back to daily writing. This was a recurring thing in my life.

After a while I just concluded that the valuable thing journaling teaches you is the importance of exploring your ideas and thoughts. Doing it religiously or with harsh constraints is no good. There must be time to explore and to just do things for a bit - that until some sort of critical mass is reached or some idea shows up that you want to discuss.

I think what confuses a lot of people is what one means with "journaling". If it's just writing about your day, I don't see that much utility in it. Effective journaling ends up being an alternative name for writing and reflecting without objective in my experience.

pedrolins commented on Ask HN: How does a CPU communicate with a GPU? · Posted by u/pedrolins

justsomehnguy · 4 years ago

TL;DR: bi-directional memory access with some means to notify the other part about "something has changed".

It's not that different for any other PIC/E device, be it a network card or a disk/HBA/RAID controller.

If you want to understand how it came to this - look at the history of ISA, PCI/PCI-X, a short stint for AGP and finally PCI-E.

Other comments provides a good ELI15 for the topic.

A minor note about "bus" - for PCEe it is mostly a historic term, because it's a serial, P2P connection, though the process of enumerating and qurying the devices is still very akin to what you would do on some bus-based system, e.g.: SAS is a serial "bus", compared to SCSI, but still you operate with it as some "logical" bus, because it is easier for humans to grok it this way.

pedrolins · 4 years ago

I find it very interesting that you mention looking at the history of ISA's first in order to understand the current iteration of the technology.

I was reading the RISC-V privileged ISA recently and the amount of seemingly arbitrary registers and behaviours that must be implemented to support a UNIX-like OS is crazy, and that got me thinking about the history behind all of these things that the hardware must support in order to support the OS.

But thank you for the pointers, I'll definitely use this.