So Last year December my cousin see's me making a basic 3D game in Unity and says he wants to do programming.

Me: No, you don't want that. Become a doctor like your parents want you two.
Him: I'll do it.
Me: Ok. If you want to suffer, i'll teach you some basic C#

Me: *Shows him basic C# code in visual studio*
Him: *Not paying attention* Cool. When can i make games?
Me: That's not how this works. Where do you intend to study?
Him: M.I.T!
Me: You better get your ass infront of that fucken computer, google and youtube the shit out of you, matter of fact i'll get you a shit bucket so you don't have to get up.
Him: I don't have to go so hard now, i'm only 16.
Me: *Facepalm* That's why you have to do this now.

...7 months later...
(Yesterday)
Me: Show me how you make a basic calculator application.
Him: I don't know how to do that, you didn't show me.
Me: *laughing*
Him: Whats so funny?
Me: You're screwed *still laughing*

Don't get me wrong. He's a smart kid. Just needs to fucken do something if he wants his goal.

So I was hired about 4 months or so in this companty, we will name it 'Derp & Co.'

The first task they want me to do was to 'clean' an android app that, for what they told me:

- Previous dev fired. said that tasks have been done but totally a lie.
- Took a fully week of 2 fellows coworkers to 'undo' the mess.
- And for the last but not least, zero documentation, like ZERO.

So, I clone the repo, install android studio, blah blah blah, get hands to the pile of code and jesus...

- The whole app was working with a gargantuan json, there was no use of POJOs at all. Objects are for normies.
- A masive copy/paste code, like 'I will need this here, crtl-c... ctrl-v, DONE!'
- Threads are free, isn't it? let's just put a thread whenever I desire to make an HTTP request and not reuse code at all.

So... with this on mind, my first task is to make proper objects:
- Coworker: 'Sorry dev, we don't have documentation for this, you must debug the code to se what the server will send to you'.
- Me: 'Real?'

Shit... ok. So I first try to figure out how the hell is made my gargantuan json. A month was entirely lost to unravel this data and implement Objects, improve their code, reuse code, etc. but at the very end:

- coworker: 'Good job dev, when the POJOs are done, we can focus on the next task, whe have to define a new DATA MODEL because the one we are using now is not good at all'.

*note: the app is on production and working with all the previous 'features' and today it still on use on some enviroments.

- Me: 'Wait... this is a joke, now you want to define new data models? This should have been done in first place!' <WTF face>
- Coworker: 'I don't think so dev, Mr. boss have this list with things to improve on the app an this is the order of do the tasks'.

Mr. boss is on vacations, two days after he came back:

- Mr boss: 'Coworker said that you have been working with POJOs, is that right?'
- Me: 'Yes'
- Mr boss: 'Why? Did not see the need of a new data model?'
- Me: 'I told that to him, but he insist on "the order" of the list.
- Mr. boss <facepalm>

This is one of the few tales i have from 'Derp & Co.'

PS: Sorry if i made a mistake on writing, english is not my first language and maybe I have done some mistakes.

Me: *Runs composer install on workstation then reads manga on phone*
Terminal: DO NOT RUN COMPOSER AS ROOT/SUPER USER
Me: *glances at computer screen, sees the words run and super user. Ctrl + C. type in, sudo composer install*
5 mins later
Me: *facepalm*

C++ - a scripting thing :|

Facepalm level : over 9000

I am a firmware developer with 4 years experience. C and sometimes assembly is my bread and butter.

Like 2 years ago, I was really interested to make a switch to application development. Got referred by my friend to her startup.

But I was a bit rusty with my data structures, high level languages and interpersonal skills.

The first question was to find the number of occurences for each word in a paragraph. The language choice was Java. But I was allowed to use C++ since it was the closest relative to Java that I knew.

And I started implementing a binary search tree from scratch and started inserting each tokenised word into it, wrote a traversal algorithm.

The interviewer, luckily, was a patient guy. After I completed my whole mess, he asked is it possible to do this in a slightly better way with constant time access without traversal.

I said yes, we can with a hash table but I dont know how to implement one. He replied I dont expect you to implement the hash table but see you use it. I asked him if I am allowed to used the standard library, for which he said ofcourse.

*facepalm*.

Finally I understood his expectation, referred cppreference.com and used an unordered_map.

Later there were some quesion on databases for which I tried my best to answer. And I frankly replied that I am not comfortable with JS frameworks as of now. Got rejected.

So the mistake is I never asked basic questions like what is the time complexity expects, if I was allowed to use standard library, didnt spend some extra time on studying stuffs needed for the domain switch and most importantly I panicked.

So ok here it is, as asked in the comments.

Setting: customer (huge electronics chain) wants a huge migration from custom software to SAP erp, hybris commere for b2b and ... azure cloud
Timeframe: ~10 months….

My colleague and me had the glorious task to make the evaluation result of the B2B approval process (like you can only buy up till € 1000, then someone has to approve) available in the cart view, not just the end of the checkout. Well I though, easy, we have the results, just put them in the cart … hmm :-\
The whole thing is that the the storefront - called accelerator (although it should rather be called decelerator) is a 10-year old (looking) buggy interface, that promises to the customers, that it solves all their problems and just needs some minor customization. Fact is, it’s an abomination, which makes us spend 2 months in every project to „ripp it apart“ and fix/repair/rebuild major functionality (which changes every 6 months because of „updates“.

After a week of reading the scarce (aka non-existing) docs and decompiling and debugging hybris code, we found out (besides dozends of bugs) that this is not going to be easy. The domain model is fucked up - both CartModel and OrderModel extend AbstractOrderModel. Though we only need functionality that is in the AbstractOrderModel, the hybris guys decided (for an unknown reason) to use OrderModel in every single fucking method (about 30 nested calls ….). So what shall we do, we don’t have an order yet, only a cart. Fuck lets fake an order, push it through use the results and dismiss the order … good idea!? BAD IDEA (don’t ask …). So after a week or two we changed our strategy: create duplicate interface for nearly all (spring) services with changed method signatures that override the hybris beans and allow to use CartModels (which is possible, because within the super methods, they actually „cast" it to AbstractOrderModel *facepalm*).
After about 2 months (2 people full time) we have a working „prototype“. It works with the default-sample-accelerator data. Unfortunately the customer wanted to have it’s own dateset in the system (what a shock). Well you guess it … everything collapsed. The way the customer wanted to "have it working“ was just incompatible with the way hybris wants it (yeah yeah SAP, hybris is sooo customizable …). Well we basically had to rewrite everything again.
Just in case your wondering … the requirements were clear in the beginning (stick to the standard! [configuration/functinonality]). Well, then the customer found out that this is shit … and well …

So some months later, next big thing. I was appointed technical sublead (is that a word)/sub pm for the topics‚delivery service‘ (cart, delivery time calculation, u name it) and customerregistration - a reward for my great work with the b2b approval process???

Customer's office: 20+ people, mostly SAP related, a few c# guys, and drumrole .... the main (external) overall superhero ‚im the greates and ur shit‘ architect.
Aberage age 45+, me - the ‚hybris guy’ (he really just called me that all the time), age 32.
He powerpoints his „ tables" and other weird out of this world stuff on the wall, talks and talks. Everyone is in awe (or fear?). Everything he says is just bullshit and I see it in the eyes of the others. Finally the hybris guy interrups him, as he explains the overall architecture (which is just wrong) and points out how it should be (according to my docs which very more up to date. From now on he didn't just "not like" me anymore. (good first day)
I remember the looks of the other guys - they were releaved that someone pointed that out - saved the weeks of useless work ...

Instead of talking the customer's tongue he just spoke gibberish SAP … arg (common in SAP land as I had to learn the hard way).
Outcome of about (useless) 5 meetings later: we are going to blow out data from informatica to sap to azure to datahub to hybris ... hmpf needless to say its fucking super slow.
But who cares, I‘ll get my own rest endpoint that‘ll do all I need.

First try: error 500, 2. try: 20 seconds later, error message in html, content type json, a few days later the c# guy manages to deliver a kinda working still slow service, only the results are wrong, customer blames the hybris team, hmm we r just using their fucking results ...
The sap guys (customer service) just don't seem to be able to activate/configure the OOTB odata service, so I was told)
Several email rounds, meetings later, about 2 months, still no working hybris integration (all my emails with detailed checklists for every participent and deadlines were unanswered/ignored or answered with unrelated stuff). Customer pissed at us (god knows why, I tried, I really did!). So I decide to fly up there to handle it all by myself

People here expect me to use strncmp(str,"ABC",strlen("ABC")) because they think strcmp(str,"ABC") is going to crash. Because they've had experiences of using strcmp and getting crashed.

All they did was, pass inside strcmp, strings that did not carry terminating null character but won't accept if i told so.

When I start a new project in Python after not doing Python for a while:

print("Hello, World.");

When I start in C:

printf("Hello, World.")

After errors: *facepalm* *facepalm* *facepalm* "RRRRGH semicolon."

Heh at least this time I remembered that Python uses print(), not printf()...

my frontend colleagues always keep amazing me with their create way of writing code:

```
const input = "a";

const result = {
"a": () => console.warn("A was selected"),
"b": undefined,
"c": () => console.log("hello")
}[input || "c"]?.();
```
Poor man's switch construct ... (facepalm)

lecturer teaching us ASP.NET in the final year of degree: Are you guys familiar with a foreach loop?

(we've been studying C# for the past 3 years and are advanced students)

me: -facepalm and leaves the class-

That feeling when you’re writing in C and it takes you hours to realize the reason you’re seg faulting is that you neglected a couple of null checks. *facepalm*

I need to tell you the story of my MOAB (Mother of all bugs).
I need to write some stuff in C (which i am fairly used to) and have a function that allocates memory for a Matrix on the heap. The matrix has a rows and columns property and an associated data array, so it looks like this
struct Matrix{
uint8_t rows;
uint8_t columns;
uint8_t data[];
}
I allocate rows*columns + 2 bytes of memory for it.
I also have a function to zero it out which does something like this
for(int i=0; i < rows*columns;i++){
data[i]=0;}

Let‘s come to the problem:
On my Mac the whole stuff works and passes all tests. We tried the code on a Linux machine and suddenly the code crashed in various places, sometimes a realloc got an invalid pointer, sometimes free got an invalid pointer and basically the code crashed at arbitrary points randomly.
I was confused af because did i really make THAT many errors?

I found out that all errors occured when testing my matrices so i looked more into it and observed it through the debugger.

Eventually i came to the function that zeroes out my matrix and it went unusually high and wondered if my matrix really was that big.
Then i saw it
The matrix wasn‘t initialised yet
It had arbitrary data that was previously in the heap.
It zeroed out a huge chunk of the heap space.
It literally wrote a zero to a shitload of addresses which invalidated many pointer.

You can imagine my facepalm