this post was submitted on 31 Oct 2023
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Programmer Humor

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[–] dauerstaender@feddit.de 49 points 1 year ago

Unsafe block detected. Extermination initiated. There is no hiding from memory safety!

[–] 30p87@feddit.de 39 points 1 year ago (1 children)

Personally,

echo Hello World!
[–] pranaless@beehaw.org 31 points 1 year ago (1 children)
use std::process::Command;

fn main() {
    Command::new("sh")
        .arg("-c")
        .arg("echo Hello World!")
        .spawn()
        .unwrap();
}

Like this?

[–] 30p87@feddit.de 10 points 1 year ago (2 children)

No, more like

use std::process::Command; fn main() { Command::new("sh").arg("-c").arg("echo Hello World!").spawn().unwrap(); }

.
Just a little bit shorter, as it seems /s

[–] funkajunk@lemm.ee 8 points 1 year ago (1 children)
[–] 30p87@feddit.de 6 points 1 year ago

I did too. Multiple times in fact, I had to look at the other Rust code!

[–] TadoTheRustacean@programming.dev 2 points 1 year ago (1 children)

Isn't echo a shell builtin?

[–] pranaless@beehaw.org 1 points 1 year ago

Yes and no. While coreutils does provide an echo binary, shells also have a built-in for optimisation purposes.

At first I had the code calling the binary directly, but then changed it to spawning a shell (and so using the builtin). It's very cursed either way.

[–] r00ty@kbin.life 19 points 1 year ago

Or, you could just go the whole hog. Create your own simple CPU emulator, design a basic 8bitesque CPU, give it an output port that is the console, and load up some basic ASM to cycle through Hello World to the console port.

[–] xmunk@sh.itjust.works 17 points 1 year ago

System.out.println

[–] starman@programming.dev 17 points 1 year ago

Console.WriteLine("Hello World!");

[–] DumbAceDragon@sh.itjust.works 15 points 1 year ago

echo "Hello world"

This is different from the other two echos here, this is Nim not Bash.

[–] Speiser0@feddit.de 14 points 1 year ago* (last edited 1 year ago) (1 children)

Definitely left. Right one won't be optimized. (And there are ~~so many~~ some mistakes in your inline asm...)

[–] TadoTheRustacean@programming.dev 1 points 1 year ago (1 children)
[–] Speiser0@feddit.de 6 points 1 year ago (1 children)

Mostly the missing listing of clobbered registers. Other than that it's mostly just that you're doing useless things, like manually putting the stuff into the registers instead of letting the compiler do it, and the useless push and pop. And the loop is obviously not needed and would hurt performance if you do every write like that.

asm!(
"syscall",
in("rax") 1,
in("rdi") 1,
in("rsi") text_ptr,
in("rdx") text_size,

)

("so many" was inappropriate, sorry.)

[–] TadoTheRustacean@programming.dev 1 points 1 year ago (1 children)

I am hopeless at getting the text_ptr simpler than i64::from_str_radix(&format!("{:p}", my_string)[2..], 16).unwrap(); How can i get it the normal way?

[–] Speiser0@feddit.de 2 points 1 year ago

Just use str::as_ptr().

Here's an example (disclaimer: I haven't used inline asm in rust before, expect issues): https://godbolt.org/z/sczYGe96f

[–] cypherpunks@lemmy.ml 8 points 1 year ago
[–] nonearther@lemmy.ml 8 points 1 year ago* (last edited 1 year ago)

console.log("Hello World!")

[–] lugal@sopuli.xyz 7 points 1 year ago
def main(): 
    print("Hello world") 
[–] DNOS@reddthat.com 5 points 1 year ago* (last edited 1 year ago)

Ec Emm this side is the best one ....

++++++++[< +++++++++>-]<. ++++[<+++++++>-]<+. +++++++.. +++.

++++++[<+++++++>-]<++. ------------. ++++++[<+++++++++>-]<+. <. +++. ------. --------.

++++[<++++++++>-]<+.

[–] 257m@sh.itjust.works 5 points 1 year ago* (last edited 1 year ago)
#include &lt;stdio.h>

int main(int argc, char** argv)
{
    printf("hello, world");
}
[–] MonkderZweite@feddit.ch 4 points 1 year ago* (last edited 1 year ago) (2 children)

plan 9 cat vs GNU longcat meme

edit: reddit image linking is broken?

[–] AMDIsOurLord@lemmy.ml 4 points 1 year ago (2 children)

Well, the GNU version does more and is more documented. The Plan9 code is frankly shitC, even for 1980z

But this monstrosity is something else

[–] 257m@sh.itjust.works 1 points 1 year ago

Plan 9 does the job. GNU is better for the end user. But if I had to maintain that stuff I would definitely want to maintain the Plan 9 code and not the GNU code.

[–] MonkderZweite@feddit.ch 0 points 1 year ago

Of course, not always is shorter better.

[–] rhpp@programming.dev 2 points 1 year ago (2 children)

reddit image linking is broken?

Well you didn't link to a reddit image, you linked to Google image search result page which is not an image.

[–] MonkderZweite@feddit.ch 0 points 1 year ago (1 children)

I did that because the image didn't show in reddt.

[–] rhpp@programming.dev 3 points 1 year ago (1 children)

Looks like you need to insert the raw image link, not Reddit's media wrapper link.

plan 9 cat vs GNU longcat meme

[–] MonkderZweite@feddit.ch 0 points 1 year ago

Oh, so it's only my browser setup that doesn't show it.

[–] sj_zero@lotide.fbxl.net 4 points 1 year ago

? "Hello World"

[–] raubarno@beehaw.org 4 points 1 year ago (1 children)

Why do you call write() for every char? You can always just pass a pointer with its length.

I am not skilled enough to do that ngl

[–] verstra@programming.dev 3 points 1 year ago

Camel case?

this_is_not_going_to_be_a_serious_debate

[–] SpaceNoodle@lemmy.world 3 points 1 year ago
echo Hello World
[–] Cwilliams@beehaw.org 3 points 1 year ago

I thought the whole point of rust macros was to abstract away the scary asm at zero cost!

[–] cypherpunks@lemmy.ml 3 points 1 year ago* (last edited 1 year ago)

dc <<<'10435358689859 70511561 11297399 23 5 3 2 ******P'

note: lemmy's "smart quotes" vs its input sanitization required me to code-format the second half of that line (and not the first half) to make it copy+paste runnable.

[–] idunnololz@lemmy.world 1 points 1 year ago

Hello, world!

[–] cypherpunks@lemmy.ml 0 points 1 year ago* (last edited 1 year ago)

base64 -d <<<SGVsbG8gV29ybGQhCg==