pjbk

6 ms·

1.
by pjbk 4mo ago
I copied the code from the book and then did my own mods. I also ended up rewriting the engine with 6502 assembly macros. That made me realize, and appreciate, high level languages that had first order functions and very different approache
2.
by pjbk 4mo ago
I learned to program with some of these books. Usborne also quickly published them in Spanish, and I was lucky that some editorial companies used to go to my school to sell their books. I grabbed the machine code and adventure programs. Tha
3.
Can't they get the small science stuff right?(theguardian.com)
5 points by pjbk 4mo ago|0 comments
4.
by pjbk 5mo ago
True. I have often encountered motion controllers where the implementer failed to realize that calculating derived variables like acceleration from position and velocity using a direct derivative formula will violate the Nyquist condition,
5.
by pjbk 6mo ago
I mostly learned programming GUI applications, in Xwindow and in general, studying the code of xv. The GUI controls were written from scratch using X resources and the code quality was top notch. I remember printing the full source code bac
6.
by pjbk 7mo ago
Well, for 'The Nine Billion Names of God' the monks finally ended up renting a computer. ;-)
7.
by pjbk 7mo ago
It seems that common sense is very difficult to program. Perhaps because we don't really know how to properly define it or how an encoding of it would look like. All of these models keep trying to convince me they can solve the Post Co
8.
by pjbk 8mo ago
People print guns and gun parts. More than you think. Now even more since metal printing is starting to become affordable. I print grip and grip attachments for my 9mms and my AR15, trigger guards, barrel clamps, etc. I also find it stupid
9.
by pjbk 8mo ago
Yet he did a lot of good leaving his money to academia and medical research. I think the Egyptians had it right. Ultimately your heart will be weighted against the feather of Ma'at, and it is up to the goddess to decide. We mere mortal
10.
by pjbk 8mo ago
Hmmm... So you are telling me in the age of AI you still need to hire software developers that know how to code? How ironic. ;-)
11.
by pjbk 9mo ago
Statements like these always brings me to memory the opening line of Hamming's Numerical Methods book: The purpose of computing is insight, not numbers . It is very easy to get carried away and forget that - in particular today when p
12.
by pjbk 10mo ago
Correct, the famous d*F=J differential form formulation with one of the versions of the Hodge operator, which I have seen named in several ways. Also depending on your definition of the star operator and current density, you often see this
13.
by pjbk 10mo ago
Indeed you can use symmetry, but it feels more like a mathematical hack, and the fact that it agrees with reality could be a coincidence. You can state that, and there is a lot of evidence for, that nature follows some basic geometrical rul
14.
by pjbk 10mo ago
What I always miss from this introductory abridged explanations, and what makes the connection between Lie groups and algebras ('infinitesimal' groups) really useful, is that the exponential process is a universal mechanism, and p
15.
by pjbk 10mo ago
Which for some of us, Spanish speakers, was on occasion amusing or lewd, depending on the context and culture. The Spanish equivalent is 'tronco' which is very similar and it is slang for a couple of things.
16.
by pjbk 11mo ago
They also mainly continued to be loyal to the Spanish crown after Argentina and Chile went through their independence, and carried out the final pacification of the Mapuche territories in the 19th century. By then only a very small part of
17.
by pjbk 11mo ago
You would have thought they learned from their mistakes implementing VST2, but they doubled down going even further basing VST3 on the Windows Component Object Model. I guess it was a decision to avoid reinventing the wheel, but you can qui
18.
by pjbk 1y ago
Today I drove past a new Tesla Model Y, still with a temporary paper tag. As I was passing by I immediately noticed some pretty heavy water condensation inside one of the lateral tail braking lights. I just rolled my eyes.
19.
by pjbk 1y ago
https://archive.is/vKXcG
20.
by pjbk 1y ago
Ahh... Brings me memories. Back in the 80s I did something similar after reading Dawkin's The Blind Watchmaker and his Biomorph evolution app. I wanted to recreate it but doing something more fun. So I hacked an Atari Logo space invade
21.
by pjbk 1y ago
To be fair, any multivariable regulator or filter (estimator) that has a quadratic component (LQR/LQE) will naturally yield a solution similar to backpropagation when an iterative algorithm is used to optimize its cost or error functio
22.
by pjbk 1y ago
As it is stated, I always thought it came from formulations like Euler-Lagrange procedures in mechanics used in numeric methods for differential geometry. In fact when I recreated the algorithm as an exercise it immediately reminded me of g
23.
by pjbk 1y ago
Things have improved. Modern water-based acrylic paints and sealers are much easier to deal with and give you similar if not better results than enamels. There are finally now some decent compact and quiet tank-less electric pump compressor
24.
by pjbk 1y ago
Well, outside of Sanborn and his collaborators, who knows. When the puzzles were first revealed and people started trying to crack them, some of them explored out of the box approaches like the design of the sculpture, odd-shaped letters, s
25.
by pjbk 1y ago
Probably correct. Different from the other cyphers, the number of symbols is short, and correlating part of the plaintext that has been revealed gives poor measures for the full string length. It has been said that the other solutions are r
26.
by pjbk 1y ago
I had to read that line three times to convince myself there was not an extra zero in that 40k figure. It's insane.
27.
by pjbk 1y ago
I always loved the isometric diagrams on Clive Maxfield's [1] books about electronics. Since a lot of circuits are non-planar (flip flops, semiconductor layers, FPGA architecture), adding a perspective view makes things uncluttered, an
28.
by pjbk 1y ago
Now do Brian Orr's clouds.mid for Windows 95. https://www.brianorr.com/blog/2010/01/14/windows-95-easter-e...
29.
by pjbk 1y ago
https://archive.is/RqzTC
30.
by pjbk 1y ago
Cool idea. Sounds like AAS Chromaphone on steroids.

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