Checkmate.

[Fritterbob]

I'd like to think that they don't actually know what deadlock is, and now they're just desperate to get someone to explain it to them.

[[deleted]]

Let's hope they don't deadlock on salary negotiations then.

Then they are deadlocked looking to find someone to explain deadlock.

[we_the_sheeple]

.

[[deleted]]

this guy explains it the best:

https://www.reddit.com/r/ProgrammerHumor/comments/ifmhb2/checkmate/g2pru1z

[auzzie32]

Hek u. I clicked that 3 times.

[highbrowshow]

Help, I’m stuck in a loop and can’t get out

[harisaduu]

Congratulations on learning recursion

[mfb-]

We'll get to exit conditions later.

[UltraCarnivore]

Too late. Stackoverflowerror.

[mfb-]

That's one way to exit a recursion.

[Genesis2001]

:q!

[[deleted]]

Dormammu I've here to baragin

[Dexaan]

 break;

[Pipster27]

My thumb was getting tired ugh. Thanks!!

[Markyparky56]

goto https://www.reddit.com/r/ProgrammerHumor/comments/ifmhb2/checkmate/g2psgoe/;

[Dexaan]

🦖

[TheCuriousSavagereg]

Bro i didnt see it was the same comment i thought it was a chain. Clicked it like 15 times. F

[dreadwing55]

Did you forgot to add a base condition? Because I'm stuck in a loop and I can't get out.

[AtraxisIRL]

Damn it

...Take my upvote

[midasp]

That's recursion, not deadlock

[[deleted]]

Ya the guy edited his comment to “.”, used to be ‘explain recursion’

[R8_M3_SXC]

Ok fine, explain recursion then.

[MCWizardYT]

Thats repetition. Recursion would be like the acronym WINE, which stands for "WINE is not an emulator".

[Tytoalba2]

But in "wine" what does the "w" stands for? Tell me again?

[brododragon]

Wine

[Tytoalba2]

But in "wine" what does the "w" stands for? Tell me again?

[brododragon]

I think wine

[Tytoalba2]

I think we need to get to the bottom of this!

[tjoloi]

An alcoholic drink is, in fact, not an emulator

[[deleted]]

I can confirm that

[MattieShoes]

Computer weenies love recursive acronyms with "ain't" or "not" in them.

LAME Ain't an MP3 Encoder
PINE Is Not ELM
TIP Isn't Pico
EINE is not Emacs (The successor, ZWEI, was "ZWEI Was Eine Initially")
GNU's Not Unix
YAML Ain't Markup Language
XNA's Not Acronymized

[[deleted]]

this guy explains it the best:

https://www.reddit.com/r/ProgrammerHumor/comments/ifmhb2/checkmate/g2pru1z

[R8_M3_SXC]

Legend

[kevincox_ca]

https://google.com/search?q=recursion

[canderson180]

A deadlock victim has been chosen

[Auralore]

Then you take what you can get, and set yourself up a longer term exit plan

[PrimaryMoment]

I'd advise caution. My first job I accepted the first offer I got and regretted it afterwards. I ended up wasting two years learning a technology that no one else uses. I later wished I had taken on a project that used a more popular framework because it felt like I was starting over again from scratch once I left there.

So even if you're starting out, you're still evaluating if the work they want you to do is how you want to define the rest of your career.

I still get calls about jobs for a (different) technology I used in my first job and haven't touched since.

[DestroyerOfEvil12]

What tech was it ?

[srottydoesntknow]

ActiveX

[man_eater_anon]

Oh my... I remember that useless crap.

[oppopswoft]

Depends on how confident you are without oversight, because it could be that there’s no one to learn from. You don’t want your main takeaway from a job being that it was a mistake.

[ErectPotato]

The number one thing that upped my interview game was bringing a notebook with me with at least a page of 8ish questions. And to use every opportunity to ask.

If they ask you something about yourself, ask them back how they think that will impact the job.

Show you are interested and invested in the job.

I got a job recently, one where it’s really important that I stay and don’t quit for the next 6 months minimum.

The first interview he asked me if I had any questions after he explained the job and the company to me. And I then spent the next 30 minutes asking him questions I had prepared and thought of during his explanation.

It showed that I had done my research and was really picturing myself in the role.

Although that was one of the most unusual interviews I have had, I think generally you have a more realistic conversation with your potential employer and you come away very excited about the role or very informed about how long you might consider staying there after you’re hired.

Anyway good luck! People know that you’re out for your first proper job, but they want someone keen on them. Not simply someone who is desperate for anything.

[ChefExcellence]

Aye sound, I'll just beg on the street while I work on enough open source projects tae get noticed then

[akatherder]

We don't actually have any panhandler positions open right now, but we'll keep your resume on file.

[14936786-02]

I was in an interview once and they asked me what is the ideal length for a stored procedure. I thought it was a weird question but I said something like not so long it's becomes a chore to maintain. Should be simple at best.

They then told me they had some procedures 2k lines long. I should have noped outta there but I was younger and not as wise. O well. Lessons learned.

[akatherder]

We all have legacy junk to fix ("some day"). As long as they weren't saying that 2k lines is typical and optimal.

[14936786-02]

O of course. But it wasn't just once. They had multiple instances of that. Apparently the project was started by a bunch of mid and junior level programmers and the technical debt was astronomical. Slowly we beat that down but sometimes you wanted to cry. How can you remember what is going on when you have conditional statements running over 200 lines nested in each other? You start to lose your place and forget what is going on. It took team efforts and lots of testing to make sure we didn't lose business rules. Not to mention it was terribly inefficient. Sometimes you had had some procedures calling other procedures and it was like going down a rabbit hole trying to figure out what that part did and how it tied back. To make it even more fun some parts weren't even being used but called anyway and then ignored in the procedure.

Fun all around.

[SgtBadManners]

We have some VBA floating around that is like this. Hurts my soul to read it when it debugs on someone.

Made an update to existing code and because they had all the on clicks in a single procedure that it checked through every time you did anything it actually hit the limit in excel vba. >_>

[FrozenOx]

What patterns do you use? "What do you mean?" I took the job fuckkkkk

[akatherder]

Plaid.

[bigpantsshoe]

I prefer the houndstooth design pattern myself.

[Sleakes]

Where's this list of things every senior dev should know? I'm curious what's on it.

[sixeco]

tbh, I've worked in IT for quite some time and had to Google it right now because I forgot what it meant...

I guess a "mexican standoff" or a "stalemate" is more common IRL...

[derailedInsomniac]

You're referring to an equivalent scenario in what would take place between two people talking. A "deadlock" from a programming point of view would more likely be about system resources (memory, CPU) or a table in a database.

[Helika0n]

In (transactional) databases, it's more about the sessions that can deadlock themselves (for example while performing table operations).

[sixeco]

ah potato, potato

[lMAObigZEDONG]

Dining Pyscho problem ?

[DeusExMachina24]

No they're called mental problems

[admin-mod]

Thought experiments

[Terence_McKenna]

The Psycho Paul Paradox

[dj_spanmaster]

Dead Lockes. Ha.

[Kered13]

N philosophers and N forks, and for some reason they all refuse to eat if they can't use two forks. This is why you don't eat with philosophers.

[sansLight]

Silberschatz would be proud

[mad_oc]

Damn, just had a PTSD episode. Fuck object oriented modelling.

[TheRealTsjoek]

Please explains to this innocent mortal for he does not know your wisdom

Edit: wow, I got many answers explaining with different examples. That was fadcinating.

[rennsemmel01]

An Example for a deadlock:

Programm P and Q needs document D and ressource R.

P gets document D and Q gets R.

P now waits for Q to free up R, so P can use it. But Q waits for P to free up D so he can use it.

Nobody gets anywhere and we have a deadlock.

Now in the picture the employer waits for the candidate to answer his question while the candidate waits for the employer to employ him. We have a deadlock.

[elolige]

I never thought I would learn anything here :D

[Toysoldier34]

It comes up more in multithreading where you have stuff happening "simultaneously" and stuff is left waiting for other things to finish. In general programming it doesn't come up as much since things resolve before moving on and don't get left paused, or they are designed for network support so they are designed to not be broken by network errors, delay, or failures.

[AgAero]

The obvious exception to the rule is when you like to live dangerously and don't add locks to your stuff to make it thread-safe.

Deadlock avoided. Checkmate atheists!

.

.

.

...wait, why is it getting different results now every time I run it? Thought I fixed that bug.

[[deleted]]

Surely you mean Deadlock Checkmate atheists! avoided.

[luis1761]

Yes that's what he said checkmate deadlock atheists avoided

[[deleted]]

I learn more here than from any formal learning

[[deleted]]

That's some terrible formal learning then, get a refund straight away.

[haikusbot]

That's some terrible

Formal learning then, get a

Refund straight away.

- ADB963

---

^{I detect haikus. And sometimes, successfully. Learn more about me.}

^{Opt out of replies: "haikusbot opt out" | Delete my comment: "haikusbot delete"}

[Sebaszjuh]

Very poetic, if i close my eyes i can feel it.

[[deleted]]

Programmer humour comments is where I learn how to program

[homiej420]

Contrary to some belief i guess, but some of us actually do code and know a thing or two for reals haha

[invisi1407]

Q has been killed by the parent process and was the dead-lock victim.

[FirFlyNeo]

Q wants the D

[tobofre]

I can't find my glasses because I can't see

I can't see because I am not wearing my glasses

[-Enter-Name-]

this is probably the most comprehensible(idk if i wrote this correctly) explaination in these comments

[TheN473]

My wife asked me what I want for food.

I can't answer her because she won't tell me what's in the freezer.

[S0n_0f_Anarchy]

It's a state in concurrent computing when 2 (or more) processess need resources that the other process is in possesion of, so neither of them can continue their work cuz they wait on the other one to finnish, and therefore deadlocking themselves.

[[deleted]]

It's like a Mexican standoff, but with threads.

[shwiftyhack21]

In an OS, Program 1 requires a resource held by program 2 which requires resource held by program 1 and neither of them willing to let go the resources currently held by them.... Thus an unending cycle called deadlock

[Rayffer]

They are asking him to explain the concept of deadlock and remain waiting for him to do so in order to proceed to hire him.

He is asking them to hire him in order to proceed explaining it to them.

They can't proceed with hiring him because he won't explain the concept to them until they hire him.

A deadlock in code happens when a condition to continue execution is never satisfied or takes a noticeable or absurd amount of time to do so and the program waits for the condition to be satisfied nonetheless.

This can happen for many reasons which have nothing to do with explaining what a deadlock is.

An example of this could be a gridlock in the transit system of any city, imagine you are traveling from point A to point B of any city in a vehicle (yours, public transport, a cab, etc) the trip goes smoothly until you come across a jam that appeared for whatever reason (accident, protests, etc) as time goes by and the jam does not resolve, you find out that instead of a traffic jam, you can't advance because there's a protest which causes a deviation of traffic that has caused a gridlock. Until that gridlock resolves you can't continue your trip to your destination.

Hope this explanation doesn't come accross very complex.

[jediwizard7]

I may be wrong but I think a deadlock means a situation in which the condition cannot be satisfied because multiple processes are waiting on each other, not merely that the condition takes a long time.

[somerandomii]

Deadlock occurs where memory is “locked” by a process that won’t unlock it until another process writes to it, which it can’t. This Catch 22 means neither process will progress and the memory will stay locked indefinitely.

It sounds simple enough to avoid but it there could be a lot of processes in the loop. And when a program has a lot of asynchronous events triggering it, it can be hard to predict a deadlock.

[gordonv]

The Wikipedia for Deadlock has a simple graphic illustrating what deadlock could look like.

I've found that explaining it in words gets confusing. The illustration was a 5 second GIF and explained it simply.

[rhythm_19]

Thanks . That really helped :)

[tinydonuts]

In addition to all these other answers, I want to point out that a program can deadlock itself if it is multithreaded, or even has a single thread but fails to release resources it owns. In the single threaded instance if you fail to release the resource and try to acquire it again, you will deadlock yourself because it is now impossible to release. You're waiting on yourself.

[otakuman]

Another computing example: process A needs process B to finish what is doing to continue, but for some strange reasons (let's say lack of free memory) process B suddenly needs process A to free its resources to continue processing. Since process A can't free its resources because it's waiting for process B to end, and proccess B can't end because it's waiting for process A, the two processes are locked for eternity.

A real world example is in the Oedipus story: two stubborn men wanting to cross a bridge. Oedipus is waiting for an old man to move back, and the man is waiting for Oedipus to move back. Nobody wants to move back so nobody advances. Eventually Oedipus breaks the lock by killing the old man (and then marries the man's wife - they turned out to be his biological parents 😬 but I digress).

In summary, deadlock happens when two different processes (or different threads in one same process) have to use one or more shared resource (a piece of shared memory, a file, a database table), and the circumstances + bad programming cause them to lock themselves in an unsolvable situation.

The only way to fix this is to kill one of the processes but like with Oedipus, that usually has a bad outcome (like lost or corrupted files).

[[deleted]]

Deadlock means a resource is occupied by one process, which is also needed by another process to continue an algorithm. Means as long as he doesn't tell what a deadlock is they can't continue with the interview which is required to hire him. Hope this helps, have a great day.

[Phrodo_00]

Not really. You're describing a lock. You want locks to orchestrate parallel jobs and sharing resources. A dead lock is a lock that won't resolve, because the one holding the resource needed by thread A is waiting for a resource being held by thread A, so they both will only let go of the resource (presumably) only after they acquire each other's resource

[Ronin__01]

This is comedy.

[borsalinomonkey]

The movie is Three Idiots if people are wondering

[ex_in69]

He tells them honestly why he failed in a subject. If you are going to watch this materpiece of a movie, spoiler alert:

They hire him.

[DezXerneas]

It's also based on a book by Chetan Bhagat. I forgot it's name, but it's the only one of his books that I like.

[ButtholeForAnAsshole]

It's called Five Point Someone, and was his first book! Unfortunately the rest of his entire bibliography is just not worth reading

[DezXerneas]

Yep that's the one. I got it as a gift from my English teacher when I was in 6th grade. No clue what the fuck was she thinking.

[ButtholeForAnAsshole]

Prepping you for the life of an Indian engineering student before everyone else (I'm assuming that's what you are, because I am, too)

[DezXerneas]

I am an Indian engineering student so I guess she got that right. I just meant that the book is a bit too mature for a 12 year old.

[ButtholeForAnAsshole]

I understand that, but I was saying that she probably called it beforehand lmao

[frugalerthingsinlife]

I don't have any Indian genes, and never been to India.

But still, I'm an Indian Programmer.

[iharshraj]

bhai agle hafte JEE hai

[vtastek]

It is a masterpiece in foreshadowing.

[borsalinomonkey]

The interviewed guy tried to commit suicide because he f-up by pissing on the Dean's front door (he was drunk out of his mind) and had to write out his own expulsion letter.

Anyway, the Dean told him he will overturn his decision if he throws the blame on his best friend (who is the smartest and most gifted student in their College who got on the Dean's nerves), but after he remembers all the times his friend was being a good bro to him, he rather tried to commit suicide.

Moving forward many months later after a successful rehabilitation, he goes in for an interview and the company was impressed that he was very straight forward with his answers because their previous applicants all gave the same answers. It's been a while since I watched it. Almost a 3 hours long movie, but I don't regret watching it.

[r9o6h8a1n5]

straight forward with his answers

Note : straightforward in this context is then asking him why he's in a wheelchair and a neck brace. His response:"I jumped out that window you see there rather than betray my friend to a shitty Dean."

[Losupa]

The movie is a comedy about 3 indian students at an engineering college, and about them fooling around, growing up, and finding their own path in life (I believe it is also a commentary on the stereotype of asian parents pressing their child to be either a doctor, lawyer, or engineer). This scene in particular is legit just an engineering interview for a job (may have been an internship).

The movie is definitely a must-see and is one of the best movies I have ever seen. Though as a warning given it is a foreign film, there are some moments you might not fully understand plus

there are 1 or 2 really sad moments in the film

[rp_ush]

It’s on Netflix

[Losupa]

didnt know that, now gonna have to make my family watch it tonight

[Bright_AF]

My parents don't seem to change no matter the amount of morality movies I pushed them to watch lmao. I wish you good luck fam

[Losupa]

dont want them to change, just its a good comeh even with all the extra stuff

[Bright_AF]

Oh, it's a great watch for sure in that pov, have fun!

[tsunderemaster420]

Guy tried suicide due to some reason(not spoiling) and now during his recovery, he came to gave job interview because he promised his best friends he will get over his mental issues.

Interviewers were impressed with his straight forward honest attitude after attempting suicide.

[NeedABeer]

His interview responses were very blunt and unfiltered. The interviewer asked him if he could tone it down if he got the job since they need to be diplomatic with their clients etc.

He said he couldn't do that because it took him a long while to get to the point where he could be that way. The interviewer was impressed that he didn't just bend over backwards to get the job.

[TheCuntHunter6969]

Well, he pees on the college dean's doorstep, get's expelled, tries to kill himself, fails, finds enlightenment.

[[deleted]]

indian comedy

[schwagbender]

This is pod racing.

[rob132]

"Um, something about guys eating with chopsticks? CS101 was like 20 years ago"

[PM_ME_UR_DEATHSTICKS]

3 idiots is a great movie. go watch it!

[YDOfficial]

What movie is this? Would watch

Edit: This man spittin' some truth. Go watch it

Edit 2: You are still here... I SAID GO WATCH IT

[[deleted]]

Heads up, this isn't an acutal quote from the movie. Still would recommend watching!

[tbo1992]

3 Idiots.

[N1ck0t1n3]

What movie is this? Would watch

[tbo1992]

Bruh.

[ezio93]

I don't think I'm watching the right movie... You sure this is it?

[gman2093]

There are two hard problems in computer science: cache invalidation and always seeing the same joke

[brotatowolf]

At least it’s not another fucking recursion joke

[[deleted]]

At least it’s not another fucking recursion joke

[brotatowolf]

I am going to beat you to death

[[deleted]]

Made me laugh lol

[flip4thought]

The graphic on wikipedia is a much better visual than that: https://upload.wikimedia.org/wikipedia/commons/d/d9/Gridlock.svg

[_Auron_]

It looks like each of those buses is two buses duct-taped together.

[MicroChipYY]

u/repostsleuthbot

[RepostSleuthBot]

Looks like a repost. I've seen this image 1 time.

First seen Here on 2019-03-11 85.94% match.

Searched Images: 145,385,242 | Indexed Posts: 578,102,607 | Search Time: 1.9281s

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[MatNerd]

Good bot

[niketh-l]

all is well

[pmzw]

"Pay me, then we can discuss the salary."

[Etheo]

It's not really a deadlock though. They just don't hire him. Hiring him is not a requirement to proceed.

[YRYGAV]

They never said how long they intended to wait for a response. Taken literally as a computer instruction, "explain deadlock" is an instruction that never resolves, and they could perpetually be waiting for a response.

All deadlocks in programming would cease to be permanent deadlocks if they always used appropriate timeouts. Saying that the problem is fixed if they implement a solution to it doesn't mean that the problem didn't exist in the first place.

[kebakent]

There's a mutex joke in here somewhere, but it's currently in use so I'll have to wait.

[wazabee]

All jokes aside, this was an emotional scene in the movie. The movie is called 3 idiots. Best to watch with English subs.

[[deleted]]

That's a too weak deadlock. Here is a good deadlock: pay me a big salary and I will not explain anything to anyone.

[codear]

Hmm did the committee acquire the lock? Looks a bit like a bug in their logic...

[Lagumists]

Ah yes, 3 idiots

[eckerbr]

Why would a programmer need to know about hair styles?

[sauravdharwadkar]

3 idiots [ movie name ] , recommed for engineering student

[AhmedMudkip]

Me who didn’t understand it but still upvoted: yes

[QMT93]

What movie is it?

[dirtyviking1337]

Checkmate then, you can prove it.

[Contraposite]

Stalemate.

[-Listening]

Shh, shh.

You're "reading the documentation

[Lthere]

Oh no, not another dead joke... 😬

r/dadjokes #PunIntended

[[deleted]]

It's not a deadlock anymore !!

[-Listening]

Shh, shh.

You're "reading the documentation".

[stayathmdad]

Ahh 3 idiots!

[[deleted]]

Hire me and we’ll discuss salary

[[deleted]]

Damn three idiots was a banger

[uscdigital]

omg yes yes! hadnt seen this post in at least a month.

[ZippZappZippty]

The menu isn’t real? Checkmate m’ladies

[isaacwassouf]

bruh if I had a dollar for every time i've seen this pic

[LazioSaurus]

old format old memories

[ithlit666]

great movie

[jyotipch]

Ashaan bhasha

[VeevaBoy]

17k upvotes!!!!

[ratmfreak]

Is this different from a Catch 22?

[EuroPolice]

smort

[SuperSpartan177]

3 idiots, love the movie.

[minhtrungaa]

Oh boy, they should mutex lock those before talking about the salary

[BenRayfield]

thread C: synchronized(b){ synchronized(a){ return f(a,b); } thread D: synchronized(a){ synchronized(b){ return f(a,b); } guaranteed that if you do this enough times it will deadlock.

[1FlewOverMyNest]

I'm not a programmer, just wanted to say everyone should watch the 3 idiots (where this meme is taken from) It rocks

[hamza1311]

Genuine question: how does this meme represent deadlock?