Me: *uses HashMap* for a problem to count some elements*

Lecturer: why are you using HashMap?

Me: it's the best way of solving the problem

Lecturer: I haven't explicitly taught you what a HashMap is so why are you using it?

Me: Because I learn outside of what university teaches me

Lecturer: there's another way to do this

Me: enlighten me

Lecturer: iterate through the array using a nested for loop and count as you go along

Me: why the hell would I want to do that? That literally decreases the efficiency of my program by alot

GG lecturer telling me it's a better idea of making my O(n) runtime into an O(n^2) instead of complimenting my code.

Seriously what the fuck is up with the fucking education system. Since when was it okay to teach students how to completely fuck your code up and promote ways of making your code so inefficient?

LONG RANT AHEAD!

In my workplace (dev company) I am the only dev using Linux on my workstation. I joined project XX, a senior dev onboarded me. Downloaded the code, built the source, launched the app,.. BAM - an exception in catalina.out. ORM framework failed to map something.

mvn clean && mvn install

same thing happens again. I address this incident to sr dev and response is "well.... it works on my machine and has worked for all other devs. It must be your environment issue. Prolly linux is to blame?" So I spend another hour trying to dig up the bug. Narrowed it down to a single datamodel with ORM mapping annotation looking somewhat off. Fixed it.

mvn clean && mvn install

the app now works perfectly. Apparently this bug has been in the codebase for years and Windows used to mask it somehow w/o throwing an exception. God knows what undefined behaviour was happening in the background...

Months fly by and I'm invited to join another project. Sounds really cool! I get accesses, checkout the code, build it (after crossing the hell of VPNs on Linux). Run component 1/4 -- all goocy. run component 2,3/4 -- looks perfect. Run component 4/4 -- BAM: LinkageError. Turns out there is something wrong with OSGi dependencies as ClassLoader attempts to load the same class twice, from 2 different sources. Coworkers with Windows and MACs have never seen this kind of exception and lead dev replies with "I think you should use a normal environment for work rather than playing with your Linux". Wtf... It's java. Every env is "normal env" for JVM! I do some digging. One day passes by.. second one.. third.. the weekend.. The next Friday comes and I still haven't succeeded to launch component #4. Eventually I give up (since I cannot charge a client for a week I spent trying to set up my env) and walk away from that project. Ever since this LinkageError was always in my mind, for some reason I could not let it go. It was driving me CRAZY! So half a year passes by and one of the project devs gets a new MB pro. 2 days later I get a PM: "umm.. were you the one who used to get LinkageError while starting component #4 up?". You guys have NO IDEA how happy his message made me. I mean... I was frickin HIGH: all smiling, singing, even dancing behind my desk!! Apparently the guy had the same problem I did. Except he was familiar with the project quite well. It took 3 more days for him to figure out what was wrong and fix it. And it indeed was an error in the project -- not my "abnormal Linux env"! And again for some hell knows what reason Windows was masking a mistake in the codebase and not popping an error where it must have popped. Linux on the other hand found the error and crashed the app immediatelly so the product would not be shipped with God knows what bugs...

I do not mean to bring up a flame war or smth, but It's obvious I've kind of saved 2 projects from "undefined magical behaviour" by just using Linux. I guess what I really wanted to say is that no matter how good dev you are, whether you are a sr, lead or chief dev, if your coworker (let it be another sr or a jr dev) says he gets an error and YOU cannot figure out what the heck is wrong, you should not blame the dev or an environment w/o knowing it for a fact. If something is not working - figure out the WHATs and WHYs first. Analyze, compare data to other envs,... Not only you will help a new guy to join your team but also you'll learn something new. And in some cases something crucial, e.g. a serious messup in the codebase.

WHY THE BLOODY HELL does everything auto play, if I wanted to see your video I would click play, DO NOT ASSUME I want o see your shitty video.

I have a laptop which I bought for the sole purpose of gaming and I bought a hell lot of games off steam to startup.

But the problem here is I have to run those games on Windows (nvidia graphics card) and I only have a primary hdd and no ssd. Even though the ram and processor is up to speed due to high I/O on disk, I am not able to get a good performance out of it. To top it off random Windows processes hogging hdd in the background.

Any suggestions on what to do?

WASM was a mistake. I just wanted to learn C++ and have fast code on the web. Everyone praised it. No one mentioned that it would double or quadruple my development time. That it would cause me to curse repeatedly at the screen until I wanted to harm myself.

The problem was never C++, which was a respectable if long-winded language. No no no. The problem was the lack of support for 'objects' or 'arrays' as parameters or return types. Anything of any complexity lives on one giant Float32Array which must surely bring a look of disgust from every programmer on this muddy rock. That is, one single array variable that you re-use for EVERYTHING.

Have a color? Throw it on the array. 10 floats in an object? Push it on the array - and split off the two bools via dependency injection (why do I have 3-4 line function parameter lists?!). Have an image with 1,000,000 floats? Drop it in the array. Want to return an array? Provide a malloc ptr into the code and write to it, then read from that location in JS after running the function, modifying the array as a side effect.

My- hahaha, my web worker has two images it's working with, calculations for all the planets, sun and moon in the solar system, and bunch of other calculations I wanted offloaded from the main thread... they all live in ONE GIANT ARRAY. LMFAO.If I want to find an element? I have to know exactly where to look or else, good luck finding it among the millions of numbers on that thing.

And of course, if you work with these, you put them in loops. Then you can have the joys of off-by-one errors that not only result in bad results in the returned array, but inexplicable errors in which code you haven't even touched suddenly has bad values. I've had entire functions suddenly explode with random errors because I accidentally overwrote the wrong section of that float array. Not like, the variable the function was using was wrong. No. WASM acted like the function didn't even exist and it didn't know why. Because, somehow, the function ALSO lived on that Float32Array.

And because you're using WASM to be fast, you're typically trying to overwrite things that do O(N) operations or more. NO ONE is going to use this return a + b. One off functions just aren't worth programming in WASM. Worst of all, debugging this is often a matter of writing print and console.log statements everywhere, to try and 'eat' the whole array at once to find out what portion got corrupted or is broke. Or comment out your code line by line to see what in forsaken 9 circles of coding hell caused your problem. It's like debugging blind in a strange and overgrown forest of code that you don't even recognize because most of it is there to satisfy the needs of WASM.

And because it takes so long to debug, it takes a massively long time to create things, and by the time you're done, the dependent package you're building for has 'moved on' and find you suddenly need to update a bunch of crap when you're not even finished. All of this, purely because of a horribly designed technology.

And do they have sympathy for you for forcing you to update all this stuff? No. They don't owe you sympathy, and god forbid they give you any. You are a developer and so it is your duty to suffer - for some kind of karma.

I wanted to love WASM, but screw that thing, it's horrible errors and most of all, the WASM heap32.

O hell I am worried... :|

!rant
... so... maybe not that much of a thing, but i think it is:

a gal (27 years old) i started teaching programming two weeks ago, who had literally no previous experience with programming, algoritmization nor c#...
... just now, after 3 lessons of 6 hours altogether, and after yesterday when i explained to her what arrays are and reminded her what loops do...

... invented bubble sort. on her own. no googling. on paper. no "trial and error code typing and running".

i'm actually pretty proud of her :)

... putting the algo concept into actual code will still be a bit of a struggle, but yeah, hell, can't help thinking that she's actually pretty smart :)

(p. s. fist lesson was i drew uml of a fibonacci algo and forced her to understand what it does, second lesson was i explained the minimum required c# syntax for her to be able to implement it and forced her to write it (with as little help as i could), third lesson was the concept of array and "okay, now here's array of numbers, make a function that will sort them")

looking forward to what will happen when i explain recursion and nudge her towards quicksort O:-)

Once upon a time, one or two jobs ago, a really awesome engineer specced out a distributed search application in response to a business need. This company was managed pretty oldschool and required a ton of paperwork and approvals.

The engineer spent many weeks running tests and optimizing the hell out of this app cluster. It flew, and he had the data to prove it could handle production workloads (think hundreds of terabytes of data being processed every single day)

Part of the way he achieved this was having RAID0 on all of the servers to maximize I/O throughput. He didn't care much about data loss, since the application itself was fault tolerant on a much more granular level.

Management, hearing about this, absolutely flipped their shit and demanded RAID6 instead. This despite the conclusive data that the engineer had that proved RAID6 couldn't keep up.

He more or less got told to STFU.

Even this despite the fact that a RAID restripe would actually take many times longer than rebuilding the failed node from scratch (a process that took about 30 minutes by hand, and could probably be automated to be done in less than five), causing a longer exposure to actual data loss throughout the length of the days-long array rebuild time.

The ill-thought-out requirement added about 50% to the cost of the project (*many* more hard drives now required), beyond the original budget, and the subsequent bureaucratic wrangling resulted in a late product launch.

6 months or so later, after real customers were using this product, the app was buckling under around half of its expected workload. A friend of the engineer suggested to management to try RAID0. Sure enough, that resolved the I/O bottleneck.

This rage-inducing story has a happy ending, though! Said engineer left the company not long after this incident, citing it as a reason for his departure. He was immediately hired by another company, making integer multiples of his prior salary.

The product the company botched the launch of by ignoring his spec? It died a few months later. Maybe the poor customer experience was to blame? Maybe the late launch? Maybe it was another reason entirely.

Either way, millions of dollars of hardware now sat fallow. This was a black eye on the company all the way up to the C-level.

tl;dr: Listen to your engineers. You hired them for their expertise.

I used to kill some time reading devrant some years ago and I just stopped because most rants were basically whinny little teenagers that think they know everything, keepers of knowledge and truth, being clearly crying babies about “ boo-hooo my coworker is not using the language I like” or something they clearly still have a lot to learn about.

Grow the fuck up. I guarantee you that when you have a few more years of experience you’ll realize how little you knew and how great you thought you were when in reality you knew shit.

Hell, I’m on my 16th year of programming experience and what o thought I knew last year had so many knowledge gaps.

Friendly advise, be more humble. You know shit. Get off your high horse and consider for a second you’re not as smart you think you are.

With that said, there are some really good rants here. But it didn’t change much from years ago.

What if Brian Kernighan was just trying to say "Hell O world" and we misinterpreted as hello world

(¬ω¬)

Built a C#/.NET application with support for a serial device. Tested it on systems A, B, C initially, all Windows system, same .NET version, same targeting, same build tool version, same initial connection configuration etc, etc.

Testing - works on A and C, B nopes.
...
OK, let's check the source, is there something about B that makes it impossible to execute that bit? - No, there is not, you checked that already, stop poking around, it definitively should work on B.
...
OK, maybe admin privileges, there is I/O involved, didn't need that on A and C, but who knows - nope, doesn't work on B.
...
OK, maybe something wrong with the connection settings? First try at reinstalling driver - but no, it doesn't work on B.
...
OK let's try with another device - more/less devices on B. Other USB ports. No. Still does not work on B.
...
OK, this is stupid, but, is the cabling alright? It is, of course it is, stupid - but it still does not work on B.
...
OK, at that point I'm just gonna ask a colleague, GrumpySoftwareDev whether he has any clue why it doesn't work on B. GrumpySoftwareDev knows nothing, but discovers that one of his applications doesn't work on Windows 10. You know nothing, Jon Snow, but it doesn't work on B.
...
OK, now I'm just going to ask another colleague TheLastOfHisKind who handed B down to me somewhat bluntly if he ever experienced problems when working with B and its serial configuration. TheLastOfHisKind tells me he does not and kindly offers me some input on the situation. Still no progress to get it working on B but he hinted he might have fucked up B's driver. I already reinstalled the driver but didn't reboot, which comes after reinstall.
...
OK, I'm just gonna remove and re-install the driver, then restart. Hu! Now the UI is gone but another serial device reacted on a general call. Not fully working on B but we're getting there.
...
OK, I don't know, I'm getting frustrated, let's borrow another system D - which has roughly the same configuration as B - from my colleague StrongCurrentGuy. StrongCurrentGuy borrows me his system and cautions me not to break it. I install the driver, plug the device and copy the application from B. It just works on D. Not on B though.
...
OK, you know what. I'm done. For shits and giggles I'm gonna remove that driver again, reinstall it and restart, maybe it'll magically work afterwar- WHAT THE HELL, I JUST OPENED IT AFTER RESTARTING, IT JUST WORKS - ON B!

... seriously, what the fuck. But yeah, at least it works now.

Not as much of a rant as a share of my exasperation you might breathe a bit more heavily out your nose at.

My work has dealt out new laptops to devs. Such shiny, very wow. They're also famously easy to use.
.
.
.
My arse.
.
.
.
I got the laptop, transferred the necessary files and settings over, then got to work. Delivered ticket i, delivered ticket j, delivered the tests (tests first *cough*) then delivered Mr Bullet to Mr Foot.

Day 4 of using the temporary passwords support gave me I thought it was time to get with department policy and change my myriad passwords to a single one. Maybe it's not as secure but oh hell, would having a single sign-on have saved me from this.

I went for my new machine's password first because why not? It's the one I'll use the most, and I definitely won't forget it. I didn't. (I didn't.) I plopped in my memorable password, including special characters, caps, and numbers, again (carefully typed) in the second password field, then nearly confirmed. Curiosity, you bastard.

There's a key icon by the password field and I still had milk teeth left to chew any and all new features with.
Naturally I click on it. I'm greeted by a window showing me a password generating tool. So many features, options for choosing length, character types, and tons of others but thinking back on it, I only remember those two. I had a cheeky peek at the different passwords generated by it, including playing with the length slider. My curiosity sated, I closed that window and confirmed that my password was in.

You probably know where this is going. I say probably to give room for those of you like me who certifiably. did. not.

Time to test my new password.
*Smacks the power button to log off*
Time to put it in (ooer)
*Smacks in the password*
I N C O R R E C T L O G I N D E T A I L S.

Whoops, typo probably.
Do it again.
I N C O R R E C T L O G I N D E T A I L S.

No u.
Try again.
I N C O R R E C T L O G I N D E T A I L S.

Try my previous password.
Well, SUCCESS... but actually, no.

Tried the previous previous password.
T O O M A N Y A T T E M P T S

Ahh fuck, I can't believe I've done this, but going to support is for pussies. I'll put this by the rest of the fire, I can work on my old laptop.

Day starts getting late, gotta go swimming soonish. Should probably solve the problem. Cue a whole 40 minutes trying my 15 or so different passwords and their permutations because oh heck I hope it's one of them.
I talk to a colleague because by now the "days since last incident" counter has been reset.

"Hello there Ryan, would you kindly go on a voyage with me that I may retrace my steps and perhaps discover the source of this mystery?"

"A man chooses, a slave obeys. I choose... lmao ye sure m8, but I'm driving"

We went straight for the password generator, then the length slider, because who doesn't love sliding a slidey boi. Soon as we moved it my upside down frown turned back around. Down in the 'new password' and the 'confirm new password' IT WAS FUCKING AUTOCOMPLETING. The slidey boi was changing the number of asterisks in both bars as we moved it. Mystery solved, password generator arrested, shit's still fucked.

Bite the bullet, call support.
"Hi, I need my password resetting. I dun goofed"
*details tech support needs*
*It can be sorted but the tech is ages away*
Gotta be punctual for swimming, got two whole lengths to do and a sauna to sit in.
"I'm off soon, can it happen tomorrow?"
"Yeah no problem someone will be down in the morning."

Next day. Friday. 3 hours later, still no contact. Go to support room myself.
The guy really tries, goes through everything he can, gets informed that he needs a code from Derek. Where's Derek? Ah shet. He's on holiday.

There goes my weekend (looong weekend, bank holiday plus day flexi-time) where I could have shown off to my girlfriend the quality at which this laptop can play all our favourite animé, and probably get remind by her that my personal laptop has an i2350u with integrated graphics.

TODAY. (Part is unrelated, but still, ugh.)
Go to work. Ten minutes away realise I forgot my door pass.
Bollocks.
Go get a temporary pass (of shame).
Go to clock in. My fob was with my REAL pass.
What the wank.
Get to my desk, nobody notices my shame. I'm thirsty. I'll have the bottle from my drawer. But wait, what's this? No key that usually lives with my pass? Can't even unlock it?
No thanks.

Support might be able to cheer me up. Support is now for manly men too.
*Knock knock*
"Me again"
"Yeah give it here, I've got the code"
He fixes it, I reset my pass, sensibly change my other passwords.
Or I would, if the internet would work.

It connects, but no traffic? Ryan from earlier helps, we solve it after a while.

My passwords are now sorted, machine is okay, crisis resolved.

*THE END*

If you skipped the whole thing and were expecting a tl;dr, you just lost the game.

Otherwise, I absolve you of having lost the game.

Exactly at the char limit