u/PhosXD

Dear Bash, I just want to fucking iterate over each line in a text file, why do you make it so hard?

First off I just want to say, this is trivial in modern Bash, my function works just fine.

readarray_compat() {
	local file_path=$1
	local var_name=$2
	eval "$var_name=()"
	while IFS= read -r line; do
		eval "$var_name+=(\"\$line\")"
	done < "$file_path"
}

Where I'm having problems though is on MacOS where for some reason we're still using 3.2, and oh boy let me tell you, trying to read lines from a file on 3.2 is a form of torture I wouldn't wish on my worst enemies. I tried countless variations of the same function that should do the same exact thing. BUT NO. No matter what I do, one thing remains constant. Bash just *cannot* for some unknowable reason just be fricking normal about escaped characters. I tried replacing backslashes with escaped backslashes, I tried printf, echo, and other various commands to maybe try to pass the text through something that wont interpret the escape characters, I TRIED EVERYTHING, if it's a string & it has escape characters, too bad bitch it's getting formatted. I even tried putting ts in single quotes & it still finds a way to fuck me over.

All the world's problems would be solved if Mac just updated their Bash.

If anyone knows how to read lines from a file in Bash 3.2, please give me your wisdom, I've been at this for 3 hours.

When people say (or at least when I do) say that AI is not a tool, I don't think it's meant in a literal sense. Yes obviously it is a tool for people to use in whichever way they choose, but it's not the same as other tools. A digital brush for example, is just a more convenient or more accessible way to paint, it unlocks features like undo redo without having to start over or paint over portions, & some people cant afford painting supplies so they have no choice but to use a digital alternative.

AI is different. It doesn't make anything better nor does it unlock new capability. Everything that's ever been done, has been done without AI, & can continue to be done without AI. It's just an unnecessary complication that destroys trust, opens the gate to a flood of scammers, pedophiles, & all around bad people to take over the hobbies & jobs of actually hard working & passionate people.
The only thing GenAI may be good at is making your process go faster which in most cases is not a good thing, it takes away from the creative process. Good art is often not rushed, nor should it be.

To be clear I'm not saying that EVERYONE who uses AI is a bad person, maybe they're just lazy or don't care about the craft. I'm just saying it gives already bad people an easy way to pull off more of their scams or schemes or whatever. Whether it be selling AI "art" without disclosure, scamming old or desperate people with chatbots, or pedos generating CP then uploading to the internet, which is disgusting, not everyone is a freak not everyone wants to see that shit.

I also want to clarify, that I am not talking about specialized AI, the kind of AI that is actually useful like AlphaFold & other technical models. I'm exclusively talking about shit like image generators, text generators, audio generators, & others of the same class.

Tiny high-level programming language built in less than a month as my first ever C++ project at 17.

- No dependencies
- Close to Python/NodeJS performance, in some cases faster (see benchmark)
- Tiny memory footprint
- Tiny executable size
- Incredibly modular. Pick & choose everything.
- Nones, Bools, Ints, Floats, Strings, Arrays, Maps (dict), & user defineable types*
- I/O, Math, File Managment, Time, Str/Arr Util, & full ANSI modules all included, most are embedded into the executable itself.

Why make this? I wanted a portable & embeddable language that was fully sandboxed, very memory efficient, & has all the essential high-level language features, all while being under 200KB in size. I have looked all over, the language I was looking for just didn't exist, so I made it myself.

I want to keep working on it & improving this because I know this is something a lot of people beside me would find useful, giving a star really helps

https://github.com/PhosXD/Ity

Everything is open source & free to use!

Any reason? Cant find anything online about this. But I cant check whether or not a file exists, no matter what path I give it. I am using C++ 26 compiled with GCC.

This is literally all I am calling: const bool exists = std::filesystem::exists("file.txt")

This is the exact error: terminate called after throwing an instance of 'std::bad_alloc'
 what():  std::bad_alloc

No it's not coming from anywhere else in my code. Minimal reproduction code, include "filesystem" call the line above. I am on Fedora Linux if that matters at all

EDIT: moving the include into my main file instead of the only file it's being used in somehow fixed it. Literally all I do is move "#include <filesystem>" from "do_things_with_filesystem.hpp" to "Main.cpp". No compilation errors when it was in the first file, why does it rely on this?? Is there some weird declarations in my codebase or something, i dont know but it works now so why should I care.

I store some data in an unordered map, create a pointer to an item in that map, then say I want to delete the item but I still have the pointer. How would I know that the item is no longer there without going and manually searching the map for the name of the item we pointed to?

I'm new to C++ & especially pointers, so forgive me for this stupid question...

EDIT: A lot of good solutions suggested, I really appreciate it! I ended up going with key lookup instead of storing pointers. The reason I didn't want to do this in the first place is because it increases complexity & I didn't want to overcomplicate

So over the past 20 days I have been working on a project to get familiar with C++, I didn't want to use AI, references, or pre-made snippets of code. Only standard google for basic questions about the workings of C++ & it's syntax.

I think I picked up most of the language rather quickly because I'm already used to programming in Python, TypeScript, & GDScript. But it was still difficult understanding the differences between references, pointers, shared pointers & such..

Anyway, as a challenge to hopefully get fluent in C++, I decided to do something not-so-simple like creating my own programming language from scratch, no third-party libraries, pure C++. After 20 days here is the result: https://github.com/phosxd/Ity

So what are the capabilities? Well I think it's best explained through code, here is an example script that calculates the fibonacci sequence:

#!/usr/local/bin/ity
import IO;

const * n = IO.prompt:['Number: '] -> INT;

var INT a = 0;
var INT b = 1;

var INT i = 0; while i < n;
    var INT c = a;
    a = b;
    b = (c+b);

    IO.print:[a];
    i += 1;
/;

We can also do functions, complex math expressions, type-casting, arrays, hash maps, & objects (without inheritence). Some features have been purposefully omitted due to personal preference in the way I like to code, such as lambdas & try-except.

The performance is also something to note, it's not blazing fast, but it's not the slowest out there either.

I took some simple benchmark tests on my system to compare with other languages:

https://preview.redd.it/6km2w3j8lleh1.png?width=651&format=png&auto=webp&s=f9e5236a9e1e1f52aba6dd77fce4561cc19c4a9e

Note: every language is running the same exact script with the same exact logic, just with changes to suit each one's syntax. is-prime & square root functions have been written into the code instead of being off-loaded to a library.

If you know of other interpreted languages I can test against, let me know!

Now finally, I am new at this stuff, but I am very passionate about programming in general,I've made countless projects & met good people along the way. Usually I drop a project like a month or two after I start it, but I don't want that to be the case for this. I want to continue polishing, improving, & actually trying to make this into something usable/practical.

If you are knowledgeable in C++, I ask of you if you have the time to spare, take a look at the codebase, give me suggestions, show me where I messed up because I know I probably did in multiple places. If you made it to the end & actually read all this, thank you so much for giving me a chance 🙃

Imagine this scenario: You have an unordered map which you take a value from as a reference. If I were to then pass that reference under a new name the reference is still in tact & the original item in the map stays the same, nothing happened, which is expected.

However, I have a case where I need to move the renamed reference to yet another name, so that it can be accessed in a higher scope. You cant do this with references, not by assigning it. The way you would do this is with the `std::move` function which performs some kind of conversion from what I can tell, it works great in my case except for the fact that now the original item in my map has been set to an undefined value.

How would I go about moving my reference without `std::move` since it kills the original item?
I would use a pointer to store the reference itself (which does work somewhat surprisingly), however in my case I do 2 things. First is the storing of the reference, the second is storing just a raw value, but whether something is a safe reference or just a normal value is not differentiated (I dont know how to) so I cant be sure that the reference wont be invalidated after the scope has exited for normal values.

I hope I explained my scenario well enough, it is quite a specific case that I am not sure how to work around. Due to how my project is set up I cant just make every value I work with a shared pointer (so that I wouldnt have to worry about references) because firstly the codebase is already a bit too large for that kind of refactor, & secondly my project does millions of iterations which it needs to do quickly (sub 200ms), making everything a shared pointer would slow that down to an unacceptable level.

https://preview.redd.it/lr2fcqm5noch1.png?width=740&format=png&auto=webp&s=3efcc5b094fd850816350f524cd68ef82a972b9e

https://preview.redd.it/0w4qx0u24ach1.png?width=672&format=png&auto=webp&s=d86f57dff68d1d57bbd044bb3303c142bd868081

Context: this is under a comment claiming I was guilt tripping because I was comparing thieves to idle spectators of thieves. The reason "rapist" is coming up is because the commenter lumped my depiction of who I was describing (the thieves) in with rapists/killers/terrorists, even though the words or the like never came up in my comment. So even though the replier was exaggerating my words in attempt to frame me as someone calling everyone I don't like the worst of the worst, I ignored it & just replied with the top comment you see in the image now, to try & correct them but apparently I'm the one who needs corrected