I recently came across a rust book on how pointers aren’t just ints, because of UB.
fn main() {
a = &1
b = &2
a++
if a == b {
*a = 3
print(b)
}
}
This may either: not print anything, print 3 or print 2.
Depending on the compiler, since b isn’t changed at all, it might optimize the print for print(2) instead of print(b). Even though everyone can agree that it should either not print anything or 3, but never 2.
If you want to use instructions from an extension (for example SIMD), you either: provide 2 versions of the function, or just won’t run in some CPUs. It would be weird for someone that doesn’t know about that to compile it for x86 and then have it not run on another x86 machine. I don’t think compilers use those instructions if you don’t tell them too.
Anyway, the SIMD the compilers will do is nowhere near the amount that it’s possible. If you manually use SIMD intrinsics/inline SIMD assembly, chances are that it will be faster than what the compiler would do. Especially because you are reducing the % of CPUs your program can run on.
5:30 h/day? My man living the dream
Windows 11 is little more than a reskin of windows 10, and they still fucked it up.
Rounded corners are mandatory (Why? I really preferred squared ones). But developers can choose to have their windows square. Why only the developers? Let the user decide how a windows looks like!
And don’t get me started on the start menu. It was a complete massacre. Tiles are gone (am I the only one that liked them?). Instead, now we pin apps to the start menu. Fine I guess, except for the fact that half of the fucking menu is taken up by fucking recomendations. If I remove every single recommendation, instead of having my space back for more pinned programs I get this message: “oh you like this precious white space? If you turned on some recommendations it would show something”. No, i don’t want recommendations, I want my start menu space back. Which btw in windows 10 used to be resizable to whatever size I wanted.
Oh and lets not forget about the volume mixer. Which some genius decided that it was better to keep it 10 clicks away from the user in the settings, instead of conveniently at one click in the taskbar. Which they also made the sound settings their own special taskbar element, instead of another taskbar program. So now if I want to replace their shitty sound settings with the ones I like (trumpet btw), now I would have 2 sound settings in the taskbar, while in win10 I only had 1.
And whose Idea was to join the sound settings and internet settings in the same taskbar button visually? Which is also not the same button functionally. You see, if you press the left side of the button it opens the sound settings, but the right side opens the internet settings. How much do Microsoft UI people get paid?
I guess we got dark notepad, that’s nice.
That is because when you’re a beginner, you read everywhere that you should be using anaconda and jupyter notebooks. I know because I did so. Neither of them lasted more than a week on my computer though.
Anything that’s not an integer or a range doesn’t belong inside []. Much more readable to use zip, map, filter, etc. And more powerful.
EDIT: that was meant for indexing lists. Strings inside [] for indexing ducts are fine.
I haven’t used npm. But pip is horrible. Some times I’ve used a well-known library that only works on linux, but there is no mention of it whatsoever, and it installs without problem. The error only happens at run-time (not even when importing!) and says nothing about platform-dependency. I only learned that it was a linux-only library because I happened to try running it on a Linux machine to see if it worked.
Many times you have to set up your environment a specific way (environment variables, PATH, install dependencies outside of pip) for it to work, and there’s no mention of it anywhere. Sometimes you install the library with pip, sometimes with apt, and there is no way to know which one. And sometimes the library is both in apt and pip, but the pip one does nothing.
Furthermore, good luck importing a library. You might have installed it with “pip install my-library” but to import it you have to do “import MyAwesomeLibrary3”. And pip won’t tell you about that.
The mistake was choosing a language, and afterwards searching for a use to the language you just learned.
My screen gets dimm enough that it’s almost impossible to see outside with the slider at the left.
The solution is extremely easy though. Put an option in the settings so pressing volume up/down while the screen is locked changes the brightness instead of the volume.
I don’t think changing a profession’s terms to “prevent stupid jokes” is a smart move.
I don’t think they do actual games for kids anymore, they are money-traps most of the time.
I’d search instead for old console games and play them on an emulator on Android.
It might be very confusing for a child if she has never played on a console though, since no touchscreen support and having buttons on the screen instead.
If you do it with fixed-size arrays you can accomplish multi-dimension with just int*. Lots of pointer arithmetic needed though. Probably still faster than n levels of indirection.
It’s actually more confusing/less correct to close bodyless elements in HTML. Since HTML treats “/>” the same way as “>” which could lead to a “/>” tag not actually being closed, if it is used on a non-selfclosing tag.
There are many git hooks. One of them checks each commit, but there’s another that triggers on merges.
This is a huge idea. I’m stealing it.
Not just for credentials, there are many times where I change a setting or whatever and just put “//TODO: remember to set it back to ‘…’ before commiting”. I forget to change it back 99% of the time.
Inline comments yes.
Function/Class/Module doc comments should absolutely explain “what”.
Make it strongly statically typed. Dictionaries and lists must have all their items of the same type. For extra confusion.
You don’t need to have wired across the room. You can put them through the wall like every other cable. If the wire tubes are not full, it isn’t very complicated. I put my Ethernet wires in the wall.
The thing about UB is that many optimizations are possible precisely because the spec specified it as UB. And the spec did so in order to make these optimizations possible.
Codebases are not 6 lines long, they are hundreds of thousands. Without optimizations like those, many CPU cycles would be lost to unnecessary code being executed.
If you write C/C++, it is because you either hate yourself or the application’s performance is important, and these optimizations are needed.
The reason rust is so impressive nowadays is that you can write high performing code without risking accidentally doing UB. And if you are going to write code that might result in UB, you have to explicitly state so with
unsafe. But for C/C++, there’s no saving. If you want your compiler to optimize code in those languages, you are going to have loaded guns pointing at your feet all the time.