piadodjanho

16 ms·

31.
by piadodjanho 7y ago
David Miranda was elect as substitute to another congressman. I don't think he has the public support to be elect by himself. He only became a congressman when the other politician abdicate the position due life threats.
32.
by piadodjanho 7y ago
There are some studies on how to scare birds in airport, they can be used in those farms as well. See: https://newatlas.com/optical-illusion-raptors-airplanes/5675...
33.
by piadodjanho 7y ago
If you think about it, in the future, the SpaceX/Blue Origin might get the ICBM part of Boeing Business.
34.
by piadodjanho 7y ago
In a previous discussion, someone was worrying about using floats to represent price in JS. I think this is a consequence on the fear mongering on using floats to store currencies. Floating Points are hard. There is a study done with academ
35.
by piadodjanho 7y ago
Yeah, I should had be more careful with my words. For the vast majority of person, there is no need to worry so much about using fp to represent currencies. There are other issues with float that will bite you in your back before precision
36.
by piadodjanho 7y ago
You are absolutely right. When adding numbers with large magnitudes differences (around 10^17 I think) it might exceed the format precision. I should have taken that in account when defining the error boundaries. In dollars, you start havin
37.
by piadodjanho 7y ago
> IEEE 64-bit floating point gives 2.1149999999999998, which is hard to get to round to 2.12 without breaking a bunch of other cases. Your issue is on how to print the float, not with the precision of fp. For instance, `21.15 * 0.1` ca
38.
by piadodjanho 7y ago
Are you sure it is not showing the exact answer because the the the cell precision set to a single decimal digit?
39.
by piadodjanho 7y ago
To see 0.1 error using _double_ you have to do at least 2*10^17 operations (assuming the worst case scenario and no subnormals). If you are working with such huge numbers, 0.1 cents is probably a cost you are willing to pay to avoid expendi
40.
by piadodjanho 7y ago
I think the "floating point are bad for storing currencies" is one of the most common misconception about floating point. Most people don't realize that the IEEE-754 single precision floating point represent real numbers with
41.
by piadodjanho 7y ago
You are probably right. But my point still stand, the format was made to deal with files much larger then the memory.
42.
by piadodjanho 7y ago
Given the constraints of the time when the format was conceived, the pdf format has a great design. I think, embedded designers should have a quick look on the PDF format to learn some tricks on how reduce unneeded memory accesses -- it bas
43.
by piadodjanho 7y ago
The PDF file format is anachronous. When the format was created, computers only had a few KBs of RAM. Yet the format should be capable of editing documents with thousand of pages. The format solves this issue by delegating the memory manage
44.
by piadodjanho 7y ago
Just want add Spatial [1] to your list. It is a inovative high level language, very different from the the traditional HDL. [1] https://spatial-lang.org/
45.
by piadodjanho 7y ago
Salgado is a great storyteller. In this [1] interview, he describe his most memorable experiences, including the Reagen shooting (about 44min). The interview is in Portuguese but there is an auto-generated subtitles. Salgado was with the Re
46.
by piadodjanho 7y ago
Maybe they wanted something that worked with non integer types.
47.
by piadodjanho 7y ago
Brazilian here. The Amazon Climate is wet and hot all year round. It rains more in Amazon Forest during the dry season of than in the wet season in most of the country. By the way, Brazil does have dry biomes, such Cerrado and Caatinga, whe
48.
by piadodjanho 7y ago
If you manage to give as much money they would get using the land to produce minerals and soy beans, there is no reason they don't choose too. The funding they provided in the past it is irrelevant compared to the sou bean production o
49.
by piadodjanho 7y ago
So that's why it return the value of last expression!
50.
by piadodjanho 7y ago
You are correct. My mistake.
51.
by piadodjanho 7y ago
Also, the printf can be used to display floating point in hexadecimal notation. The printf specifiers: %e Scientific notation 3.9265e+2 %a Hexadecimal floating point -0xc.90fep-2
52.
by piadodjanho 7y ago
Also variable assignment with identifier list: a = 0; x = (type_t) { .y = a++, .x = a++ } Now, figure it out the order of the field's assignment.
53.
by piadodjanho 7y ago
I reckon that most language with grammar inspired in C describes the comma operator.
54.
by piadodjanho 7y ago
A more obscure feature is the uncommon usage of comma operator. We often use the comma operator in variable declaration and in for loops. But it can also be used in any expression. For instance, the next line has a valid C construct: r
55.
by piadodjanho 7y ago
> Every documentation I've seen is quite light on the branch prediction improvements. In one of the pictures in the article, it says the new architecture uses the TAGE Branche predictor. This is likely based on the work of Andre Sez
56.
by piadodjanho 7y ago
Related but only on morphology: r/neography
57.
by piadodjanho 7y ago
There is a lot of text commented out in the original files [1]. I reckon they were concerned about the length of the paper. Unfortunately, the original images are still quite small. > do yourself a favor and make the major conclusions gr
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by piadodjanho 7y ago
Does anyone know of any FPGA implementation?
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by piadodjanho 7y ago
I see your point. I think I might have failed to express my point of view clearly. I was talking about reason Boeing chose to rebrand the 787-MAX.
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by piadodjanho 7y ago
Yes. I think it is appropriate to call this fearmongering. The planes with the faulty software are grounded and won't be flying until they new software is proven to be safe. The re-certification process will likely be stricter than usu

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