Live data from Hacker News

Viewing profile — nferraz

nferraz

HN member
Joined
Sat, Sep 10, 2011, 11:14 AM UTC
HN karma
93
Public activity
21 items

About nferraz

Software developer, master in business information systems, more than 20 years of experience with Linux and Free / Open Source Software.

Recent public activity

  1. comment
    Comment #47220801

    I liked the way how you bootstrap the agent from a single markdown file.

  2. comment
    Comment #45331266

    Why did you opt for "highly-abbreviated commit IDs"? Instead of: ``` calendar/seasons.blog 196 40 d1 196 196e749 40 40c52f4 d1 d142598 ``` The tool should simply display: ``` calen…

  3. comment
  4. story
  5. comment
    Comment #42171225

    > While LLMs are capable of writing functional Verilog sometimes, their performance is still subhuman. The key word here is "still". We don't know what the limits of LLMs are. It's…

  6. comment
    Comment #41601555

    > The surest sign of a market for lemons is when everything for sale is garbage, and nobody has an incentive to put something up for sale that's not garbage, because they have no w…

  7. comment
    Comment #40381415

    In fact, NAND gates are enough to build a Turing complete machine. ;-)

  8. comment
    Comment #35639110

    It's a simple text adventure game engine. It looks like this: --- The Lost Kingdom You are a brave explorer on a quest to find the lost kingdom of an ancient civilization. You are …

  9. story
  10. story
  11. comment
    Comment #12957743

    st - simple statistics from the command line https://github.com/nferraz/st

  12. comment
    Comment #6327671

    Nice! They definitely overlap, although there are a few differences... I'm not sure if ministat accepts bignum, scientific notation, etc.

  13. comment
    Comment #6327093

    Yes, Sprint suggested this: octave -q --eval "mean = mean(load('$1'))" But, again, octave requires more time to warm up...

  14. comment
    Comment #6327090

    Yup, octave requires more time to warm up. Regarding speed, for simple calculations like sum, mean and variance, the bottleneck is in I/O.

  15. comment
    Comment #6327072

    There isn't a max rowcount for sum, mean, variance, etc, because it is not necessary to hold the data in memory. The calculation of median and quartiles require that the whole set …

  16. comment
    Comment #6327055

    Thanks! I changed the algorithm to online variance, hope it is more stable: https://github.com/nferraz/st/commit/d0fb1bf814fc5940c5aae39...

  17. comment
    Comment #6326971

    Thanks for the information! I wanted to use "stat", but it was already used (display file status); "statistics" was too big. Just as curiosity, I got the idea for this script when …

  18. comment
    Comment #6326941

    I like octave and R! The reason I wrote this script was to get quick results from the command line. For instance: I could use grep, cut and other unix tools to get the numbers from…

  19. story
  20. comment
    Comment #4470604

    Super cool project! Thanks for sharing!!!

  21. story
    XML User Interface for Appcelerator released as Open Source

    After months of development, I decided to release the XML User Interface for Appcelerator project as Open Source Software! With Appcelerator, you can create cross-platform mobile d…