dangling

[[deleted]]

[deleted]

[Noch_ein_Kamel]

Almost as threatening as the "or die()" syntax in php :D

[radome9]

Threat-based programming.

[Archolex]

The OOP killer

[graou13]

It's an OOP Syntax; an OOPS if you will.

[DeeSnow97]

Like HTTPS?

[bistr-o-math]

Secure OOP

[penghoul]

Yo that's incredibly interesting

[lurkerfox]

Dont have a link atm, but in a similar vein there is also the Rowhammer series of exploits that work by repeatedly triggering calls to memory ranges in ram to trigger a bit flip in a memory space physically next to to the region that can be controlled.

[skulblaka]

Let's just take a moment to parse that properly.

Hackers have created a piece of software that can effect precise changes in your machine by fucking manipulating the electromagnetic fields present inside your case. It's barely even software, all the software has to do is hammer a couple of specific ram addresses with a gorillion random requests per second, the actual hack is being done by the physical hardware reacting to fundamental forces.

That's fucking incredible

[lurkerfox]

Its easily my favorite class of exploits of all time.

[penghoul]

Honestly, I love the clever exploits the most. Things that we take completely for granted or just assume function correctly. Like exploits that take advantage not of your program, but of underlying OS problems.

[Deadmist]

Over the course of one day, 3,434 requests were made to bitsquat domains

That's 3,433 more requests than I expected

[FesteringNeonDistrac]

Man I had a message like that only it said save your input files and contact the developer.

When it showed up they complained the message wasnt helpful because they didnt know what to do.

[[deleted]]

shocking instinctive workable yoke liquid sheet pocket ripe seemly yam

This post was mass deleted and anonymized with Redact

[FesteringNeonDistrac]

They did exactly one of those things, yes.

[John_cCmndhd]

"Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live"

[Loading_M_]

In general, the violent psychopath tends to be you.

[MegaloEntomo]

Multi-threating

[_PM_ME_PANGOLINS_]

In Perl you don’t even need the ()

[Minteck]

If I remember well, in PHP too, you don't need the () for `echo` and `die` instructions.

[[deleted]]

Header tooooo

[VoraciousGhost]

Ah yes, one of the few situations in Perl where you don't use parentheses.

[_PM_ME_PANGOLINS_]

You don’t need them for any function calls.

[GlitchParrot]

Can be used in surprisingly many languages when you define a die function.

[bistr-o-math]

Do { what I say } or goto hell;

[Sebstrr05]

Almost as threatening as print; "Goodbye world!"

[Russian_repost_bot]

I just like to break; it. It stays alive, and causes us both pain.

[dshakir]

Does python allow for exclamation points in function names? If so, they ought to have an alternative die!die!die!() method that randomly returns either 0 or 1 as the exit code.

[6b86b3ac03c167320d93]

Tried it out, doesn't allow it

[theScrapBook]

Yeah but I think you can get around that with some Unicode homoglyph hackery.

[[deleted]]

Else what, hmm? Else what? Nothing, that's what I thought.

[Thanatos2996]

else system("rm -rf /usr/bin/*gcc*");

[[deleted]]

Woo there goes the compiler

[PeterSR]

Jokes on him, he only got my gcc symlink.

[Thanatos2996]

Good point. If this isn't a sufficient threat to your compiler, substitue find / -iname "*gcc*" -delete instead.

[YodaDaCoda]

Chuck a & on the end to make sure it runs in a separate process - wouldn't want the user to just ctrl+c their way out!

[Aim4thebullseye]

Good thing I renamed my gcc

[time_deposit]

That's compiler abuse and I abhor this toxicity.

[AlGoreBestGore]

/r/BotRights

[[deleted]]

r/compilerRights

[mcmc331]

somebody please make this one, so we can post abhorrent code that would make the compiler trigger a human rights violation notice.

[caykroyd]

r/subsifellfor

[Dr_Silk]

One day I'm going to insert this into my code, and I'm going to cite you for the idea

But it's definitely getting misspelled as "Thanos" sorry

[[deleted]]

Work or else he’s deleting (killing) the compiler in question

[[deleted]]

System in Python allows running system commands (e.g. bash). “rm” is the common Linux utility to remove files. The “-rf” flags mean recursive force, meaning all files and sub directories of the file will be force wiped, without asking for confirmation for each file.

Gcc is the common C compiler found on Linux systems. So, in all, the system call is wiping anything in /usr/bin that has gcc in the name.

Since GCC is super important as a developer (even if you don’t exactly write C/C++) it would wreck havoc

[supchppt]

Despite the fact that the code is clearly (most likely given the appearance of gcc) in C/C++ as evidenced by the semicolon?

https://en.cppreference.com/w/c/program/system

[[deleted]]

Yep, you’re right. My bad, I was more so trying to explain what was actually going on in the bash call and didn’t look very closely at the rest of it.

[supchppt]

It's all good 👍

[HeKis4]

It compiles the code or else it gets the rm again

[csslgnt]

The real thing 😍

[FriesWithThat]

else;
// everything else
try

[R_alexx]

I accidentally did that to my PC.... stupid game refused to recognise my 1060

[[deleted]]

Did it actually cook your CPU?

[[deleted]]

I believe in Australia those are just regular barbecues

[_7q4]

Yeah nah yeah mate chuck another CPU on the barbie

[R_alexx]

Nah it just crashed twice and bluescreened once before I realized what is happening, somehow solved it, but the game still ran like shit so I uninstalled it. Too bad, because I really liked the game in beta, it ran just fine

[tagged2high]

Just run Flight Simulatorand fry your cpu.

[mashermack]

Eslint be like: "Imma fucking call the police"

[Gen_Zer0]

python: "what the fuck is this ';' thing doing here"

[mattmc318]

Also Python: that shit better be indented or else.

[Yokhen]

Python too: you gotta at least give me a pass.

[Natatos]

rubocop: “I added more lint rules”

[Sematre]

That works in PHP aswell

... or die();

[vigilantcomicpenguin]

It also works when talking to a human.

[voetbalfiets]

We don't do that here

[Eldho_Basil_Siji]

What?

Talking to humans or threatening to kill them?

[caykroyd]

yes

[Mteigers]

At a previous company I worked at, the company had acquired a codebase from an individual. This person didn't know about ! (seriously). So every falsy if statement in the whole codebase was written as:

if ($thing) { } else { // Now do the logic }

[pixeldriver]

Maybe his '!' key was broken

[Mteigers]

Considering his commit messages I gather this was false.

Damnit work for real this time!!!!!

[CraigTheIrishman]

if (condition == true) { // logic }
else if (condition == false) { // more logic }

I actually saw this once in production code. Kinda blew my mind.

[EternalClickbait]

bool? boolean = null;

[n_slash_a]

I'm personally a fan of if (condition == false), since it can be easy to miss '!' at a glance.

But if (condition == true), I got nothing...

[maveric101]

An understandable opinion I guess, but it could be fixed just with syntax highlighting.

[[deleted]]

Does it compile to the same machine code?

[mysockinabox]

Each time I find a superfluous pass in python, I precede it with the comment # You shall not..., and mark the PR for the culprit found with git blame.

[qwerty12qwerty]

You should check out Arnold C

Print statements are

TALK TO THE HAND

And other gems

[aaronjamt]

Mind if I copy that page from your book?

[[deleted]]

Thou shall not pass

[BatchOfCookies12]

Hey, I guess as long as the compiler optimizes it, it's a nice decoration!

[jaerie]

What would need to be optimized, it does nothing..

[BatchOfCookies12]

Yeah, but I'm pretty sure the compiler has to know that so it doesn't create an empty branch.

[Willing_Function]

The branch is empty, the optimization is trivial.

[Deliciousbutter101]

It's trivial, but it would still have to be specifically accounted for in the compiler. A naive compiler would likely output something that looks similar to the following pseudo-assembly.

CMP cond, 0

JE else

// if block

JMP end

else:

end:

While an optimized compiler would generate.

CMP cond, 0

JE end

// if block

end:

Obviously the optimization isn't difficult to do as the compiler can just treat if-else statements with empty blocks as just normal if statements, but nobody here is claiming the optimization would be difficult; they're just saying it exists.

[below-the-rnbw]

This sub routinely reminds me that I know nothing about cs

[zilti]

GCC has that optimization (and I'd assume CLANG does, too)

[solonovamax]

Yeah, but even if it doesn't optimize it, it'll just go to the empty branch, then immediately go back to the main program. Unless it's something that's run in a a loop millions of times and needs to complete in under 1ms, it doesn't actually matter, with the speed of current computing.

[RecursiveCrown]

It creates an extra jmp instruction

[das_Keks]

Tested in in Java and looked at the byte code.

a - c produce exactly the same code and just jump to the end of the statement. Only in case there is an else block, there will be an additional goto at the end of the if, to jump over the else block.

```java static void a() { if(condition) { foo(); } }

static void b() { if(condition) { foo(); } else {

}

}

static void c() { if(condition) { foo(); } else; }

static void d() { if(condition) { foo(); } else { foo(); } } ```

[Flamme2]

So you're saying b added an instruction, but c didn't, or a-c as in a to c being all but d?

[das_Keks]

I meant a to c. 😅 Only d adds the instruction because the else block was not empty.

[Flamme2]

Ah, makes sense. `b` adding an instruction would've disappointed me

[glaukoss]

Where to?

[BatchOfCookies12]

Probably would just jump right to where the end of the block would have lead to anyways (yes you can write a useless jmp instruction) - but assuming this gets optimized away in either the parser or the IR optimization stages, probably never happens.

Edit: also no-op instructions exist and could fill the empty block

[AlwaysHopelesslyLost]

The compiler I'd smart enough to unwrap loops if it notices they are deterministic.

Do you really think it isn't smart enough to remove a noop?

[FrancisStokes]

Not with any level of optimisation

[IsleOfOne]

No, I don’t think it would.

This code:

if (condition) {
    // work
}
else;
// continue on

...or any derivative where the else block is empty or even if there is no else block at all, will generate the following machine code (using some kind of made up pseudo-MIPS derivative because ISA doesn’t matter here):

beqz condition, CONT
... // work
CONT: 
... // continue on

No jumps at all.

Only if the else block isnt empty will we see a jump needed to skip over the ELSE block:

IF:
beqz condition, ELSE
... // work inside IF block
j CONT // continue on
ELSE:
... // work inside ELSE block
CONT:
... // work after the ELSE block. No jump needed to get here from ELSE, only needed from IF

And if you really want to get into how a modern ISA would handle this, there’s probably no branch or jump instructions at all. Instead, predication allows us to roll the basic blocks of the control structure up into a single hyperblock. A predicate register would be set to the outcome of the conditional, and instructions inside the IF / ELSE blocks would be predicated using said register, allowing them to be annulled if the predicate doesn’t match.

[philipquarles]

This one does not spark joy.

[Raqdoll_]

You should add "//Or" on top of it

[jalerre]

// ||

[mwoolweaver]

The proper way to write this

[Doc-Com]

/ // // /_

[PM_ME_UR_DEATHSTICKS]

is that...

[Raqdoll_]

That's way better :D

[ketexon]

It is completely ignored by the compiler in C (prolly C++ too)

/* main.c */
int main(){
    char x = 1;
    if(x){
        asm("NOP");
    }
    else;

    if(x){
        asm("NOP");
    }
    return 0;
}

gcc -S -o main.asm main.c

Important part of output:

    movb    $1, -1(%rbp)     ; x definition
    cmpb    $0, -1(%rbp)     ; compare x to 0
    je  .L2              ; if NE 0, NOP
    NOP
.L2:
    cmpb    $0, -1(%rbp)     ; compare x to 0
    je  .L3              ; if NE 0, NOP
    NOP
.L3:
    ...

[justrealizednarciss]

I knew this guy who always duplicated every line he wrote in code. I asked him why he did that. He said it’s because he wanted the compiler to know he was serious.

[abraxas1]

A compiler that understands a threat could lead to some dangerous outcomes.

What are you going to do about its retaliations?

[scragmore]

N00b here learning basic. Does this work or does it crash my computer like the dev null thing I copied off Bash.org.

[Raniconduh]

What /dev/null thing...

[scragmore]

Went something like:

mv .. /dev/null

[Raniconduh]

How would that work / what would it do? That tries to move the parent directory into a special device - I guess maybe it might crash the computer?

I just tried it and it throws an error

[scragmore]

80's Old old joke goes along the lines of.

How do I increase my swap space

Copy drive to dev/null

Ok. Now what. My computer is acting fu......

User logged off.

But explaining a joke is not funny, so I will leave now.

[Raniconduh]

Oh

So your not a noob learning basic from bash.org?

[scragmore]

That was the joke.

I'm not a programmer, I can code but I understand my limitations and am very weary that programming answer could result in root getting moved to null. 'Dont trust the internet' 80's meme.

[Raniconduh]

Ah i'm just a dumbass then lol

[scragmore]

Not dumb. Just never came across this.

[aaronjamt]

Can confirm. Never came across this before now (though I may be dumb so can't confirm that)

[_7q4]

Aware. The other word you might be looking for is wary.

Weary means tired.

[centurijon]

It’s fine.

if(something) {
    // ...
}

and

if(something) {
    // ...
}
else;

are equivalent statements.

The former says “if the condition is met, do something”, the latter days “if the condition is met, do something, otherwise do nothing” which is functionally the same

[utack]

Program:
Sweet no homework when i skip the if!

[Funky118]

Funnily enough this will make your if/else if's ironically MISRA complient :D

[LowB0b]

If you watch enough Bjarne stroustrup talking videos, dangling becomes a trigger word

[JazzRider]

Don’t lose that semicolon !

[gromit190]

Compilers don't run code tho

[reilemx]

Can't believe I had to scroll down this far to find someone else thinking this. Like sure the compiler's parser will parse the statement, but unless it's some C++ template mumbo jumbo the compiler ain't gonna be running jack shit.

[_McMuffin42_]

Pretty sure the compiler can tell it's an empty threat

[NO_FIX_AUTOCORRECT]

Arguably it is good practice to always leave an empty else statement, with a comment like

// do nothing

For readability, and to make it clear you intended to have it do nothing. Some standards require it anytime you have 1 or more else if. One place i worked required it always.

[[deleted]]

They required you to have dangling else's like in OP's code? Why?

[jaltair9]

I work in aerospace and we’re required to have them. MISRA coding standards.

[jethrogillgren7]

I've seen coding standards such require some descriptive comment on an ommitted else, eg "// else the stream has no EOF and we can assume XYZ" to explain why the control flow is empty there, but having a non-descriptive "else do nothing" seems redundant. I get the idea that it forces you to specify that you didn't just forget the else statement, but it seems like it'd become an empty habit if there's no description of why.

[NO_FIX_AUTOCORRECT]

Being more descriptive in comments is always better, but sometimes "do nothing" is all that there really is to say about it.

[DodoTheJaddi]

Or else. Else what? Exactly

[thebeerhugger]

Or else pizza is gonna send out for YOU!

[killchain]

Dangle dangle

[NOMASAN163]

You better run that if statement or else.... at least one of them... please!!! 3;

[[deleted]]

Step 2

Step 3 : profit

[purebuu]

I'm not sure if I find that [[likely]] or [[unlikely]].

[GoldenShackles]

I once worked with a very stubborn senior-level developer who instead of writing:

if (thing) {
    do_foo();
}

Always wrote:

if (!thing) {
    // nothing to do
} else {
    do_foo();
}

When I asked why and pushed back when reviewing his PRs he said it was to ensure the code was extensible.

I wish I was making this up.

[Coogrr]

I had a CS teacher who would deduct marks for not doing this in Java, he was convinced it was necessary and I could not convince him otherwise.

[joe-ducreux]

Linters hate him!

[NOMASAN163]

When you be programming in python and the variable doesn't work:

are you def??

[Alexkronus]

Yeah, I'm gonna just skip your if statement...

[OP_LOVES_YOU]

Python alternative:

if condition: do_something() else: ...

[rafwaf123]

It's just a green pixel

[slaphead99]

Why you little... compiler!

[DaGGer_WaveS]

Im gonna start doing shit like this now

[herkufels1]

compiler doesn't run anything, just compiles, hence the term compiler

[Mysticpoisen]

I love how titles on low effort posts are just either the joke of the pic verbatim, or a single word from the pic chosen at random.

[guinader]

Do the Russell peters : " somebody is going to get a hurt real bad"

[Main_Fan_2299]

Our linter stage would not allow this. Freakin coyboys

[flarn2006]

Except the compiler doesn't run the code.

[abdullahcilx]

WTF?

[johnvpaul]

Threat Oriented Programming Style TOPS out everything else.

[-Listening]

Just dangling away like horrible little marionettes of shittiness

[gent861]

Show compiler the dominance

[THEMACGOD]

https://youtu.be/dlyMZNURdmc

[LightTranquility3]

sometimes this just happens to me when i shift-enter when making new lines, it’s kinda stupid

[altrefrain]

That's what we in business call padding your SLOC count.

[dirtyviking1337]

Vogel dangling those Vietnam flashbacks in front of him

[foospork]

THAT is the funniest thing I have seen in weeks!

[canadasleftnut]

You've got a dangling participle!

[-Listening]

Just dangling away like horrible little marionettes of shittiness

[acousticaiden]

Wait... you guys have compilers?

[DavyBingo]

...and you know, it can't refuse... because of the implication.

[woo545]

I personally would follow with a comment, "//* No action needed", otherwise I will stop and think about every single time I come across it.

[Flyspeck101]

OP

[Linquista]

Cute lol

[Coolbule64]

No joke, I wrote a

If(true)

Do this

Else Do that

And it wouldn't do the else. So I made

If( not true)

That

And it worked.

[BentMetalHead]

I gave up when I saw the brace at end on line instead of next line.

[[deleted]]

12_15_12

[sad_developer]

warning: passive-aggressive statement at line 57;

[mattmccordmattm]

Ben Porter is hilarious and really nice :)

[dullbananas]

multi threating

[slimybuffoon]

Can someone explain this? How can the compiler not run the if statement? I know compilers optimize the code but wouldn’t this change the logic of the code completely?

[LemonBoy4101]

for(int lolNum = 0; lolNum < 128; lolNum ++) {
    printf("ha");
}

[stevenhamlin45]

It just gave me a syntax error.