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Joined devRant on 4/7/2016
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Toilets and race conditions!
A co-worker asked me what issues multi-threading and shared memory can have. So I explained him that stuff with the lock. He wasn't quite sure whether he got it.
Me: imagine you go to the toilet. You check whether there's enough toilet paper in the stall, and it is. BUT now someone else comes in, does business and uses up all paper. CPUs can do shit very fast, can't they? Yeah and now you're sitting on the bowl, and BAMM out of paper. This wouldn't have happened if you had locked the stall, right?
Him: yeah. And with a single thread?
Me: well if you're alone at home in your appartment, there's no reason to lock the door because there's nobody to interfere.
Him: ah, I see. And if I have two threads, but no shared memory, then it is as if my wife and me are at home with each a toilet of our own, then we don't need to lock either.
Me: exactly!12 -
We had a Commodore64. My dad used to be an electrical engineer and had programs on it for calculations, but sometimes I was allowed to play games on it.
When my mother passed away (late 80s, I was 7), I closed up completely. I didn't speak, locked myself into my room, skipped school to read in the library. My dad was a lovely caring man, but he was suffering from a mental disease, so he couldn't really handle the situation either.
A few weeks after the funeral, on my birthday, the C64 was set up in my bedroom, with the "programmers reference guide" on my desk. I stayed up late every night to read it and try the examples, thought about those programs while in school. I memorized the addresses of the sound and sprite buffers, learnt how programs were managed in memory and stored on the casette.
I worked on my own games, got lost in the stories I was writing, mostly scifi/fantasy RPGs. I bought 2764 eproms and soldered custom cartridges so I could store my finished work safely.
When I was 12 my dad disappeared, was found, and hospitalized with lost memory. I slipped through the cracks of child protection, felt responsible to take care of the house and pay the bills. After a year I got picked up and placed in foster care in a strict Christian family who disallowed the use of computers.
I ran away when I was 13, rented a student apartment using my orphanage checks (about €800/m), got a bunch of new and recycled computers on which I installed Debian, and learnt many new programming languages (C/C++, Haskell, JS, PHP, etc). My apartment mates joked about the 12 CRT monitors in my room, but I loved playing around with experimental networking setups. I tried to keep a low profile and attended high school, often faking my dad's signatures.
After a little over a year I was picked up by child protection again. My dad was living on his own again, partly recovered, and in front of a judge he agreed to be provisory legal guardian, despite his condition. I was ruled to be legally an adult at the age of 15, and got to keep living in the student flat (nation-wide foster parent shortage played a role).
OK, so this sounds like a sobstory. It isn't. I fondly remember my mom, my dad is doing pretty well, enjoying his old age together with an nice woman in some communal landhouse place.
I had a bit of a downturn from age 18-22 or so, lots of drugs and partying. Maybe I just needed to do that. I never finished any school (not even high school), but managed to build a relatively good career. My mom was a biochemist and left me a lot of books, and I started out as lab analyst for a pharma company, later went into phytogenetics, then aerospace (QA/NDT), and later back to pure programming again.
Computers helped me through a tough childhood.
They awakened a passion for creative writing, for math, for science as a whole. I'm a bit messed up, a bit of a survivalist, but currently quite happy and content with my life.
I try to keep reminding people around me, especially those who have just become parents, that you might feel like your kids need a perfect childhood, worrying about social development, dragging them to soccer matches and expensive schools...
But the most important part is to just love them, even if (or especially when) life is harsh and imperfect. Show them you love them with small gestures, and give their dreams the chance to flourish using any of the little resources you have available.22 -
Oh my god... Storytime.
A customer comes in with I assume is his father or grandfather.
Customer: I need a computer, but without all the internals
Me: So a case?
Customer: Yes, I need a Dell computer outsides, but without the internal components.
Me: Well, we don't have Dell cases, but we sell custom build cases and they come with a power supply.
Customer: *says nothing, but looks interested*
Me: *walks over to the cases to show him* So this is what the cases look like and we have two types, one for a ATX and one for a micro-ATX.
Customer: *still says nothing, but looks at them*
Me: What motherboard do you have at the moment?
Customer: Well, I don't have anything right now, but I'm replacing another computer that didn't work very well. I'm going to be getting some Dell parts to put in here.
Me: O-okay. So this other computer, I'd like to see it in shop to see what's going on with it.
Customer: Oh, you do NOT want to do that. I hooked it up to another computer and it blew it up.
Me: Huh, that's weird. I'd still like to look at it if possible.
Customer: Oh no, it's all wired wrong and... *some bullshit, but stay with me*
Customer: I am the best at technology. My hand has computer parts in it--government funded. *some more bullshit*
Me: Okay... *I try to bring it back around* Well, I'd still like to see the other computer for myself. So you don't have parts for this new build yet, right? You don't know what type of motherboard you have?
Customer: No.
Me: Well, I would get the internals first, so you know what size of case to get, and then get the case.
Customer: Okay. Thank you for your time.
He shook my hand with his "cyborg" hand and I was tempted to say something about "try not to crush my hand," but elected not to. Also during this entire exchange, the old man continuously farted in the background.22 -
How you can make the perfect clickbait that will even bring highly intellectual software engineers to click on your things?
It is very easy you only have t... [read more]9 -
Client: our app has low ratings, we fired our previous dev company and hiring you instead.
Us: all right, seems like to make a better app we need 5 months.
C: you're kidding, do it in 6 weeks.
U: Ok, but we'll have to drop some features.
C: get rid of X and Y, nobody uses them.
U: deal!
... 6 weeks later...
U: here's the new app: better graphics, easier to use, more stable and more future-proof.
C: Cool! Let's deploy!
... 2 days later...
C: we just released but the users are really pissed off!
U: what do they say?
C: "what the fuck happened with X and Y? they were the only thing we're using! what a load of crap! 1 star"
Dear client, next time get to know better your users...8 -
Manager asked for access to server with admin rights for a third party contractor and I questioned him... His answer?
- Your are gonna give access to anyone that needs access.
I gave. Went for a 15 days vacation.
Our server got blocked by our cloud provider because of ssh brute force attempt coming from it and the company website went offline during a big ass meeting because of that.
Made me giggle :)11 -
*Now that's what I call a Hacker*
MOTHER OF ALL AUTOMATIONS
This seems a long post. but you will definitely +1 the post after reading this.
xxx: OK, so, our build engineer has left for another company. The dude was literally living inside the terminal. You know, that type of a guy who loves Vim, creates diagrams in Dot and writes wiki-posts in Markdown... If something - anything - requires more than 90 seconds of his time, he writes a script to automate that.
xxx: So we're sitting here, looking through his, uhm, "legacy"
xxx: You're gonna love this
xxx: smack-my-bitch-up.sh - sends a text message "late at work" to his wife (apparently). Automatically picks reasons from an array of strings, randomly. Runs inside a cron-job. The job fires if there are active SSH-sessions on the server after 9pm with his login.
xxx: kumar-asshole.sh - scans the inbox for emails from "Kumar" (a DBA at our clients). Looks for keywords like "help", "trouble", "sorry" etc. If keywords are found - the script SSHes into the clients server and rolls back the staging database to the latest backup. Then sends a reply "no worries mate, be careful next time".
xxx: hangover.sh - another cron-job that is set to specific dates. Sends automated emails like "not feeling well/gonna work from home" etc. Adds a random "reason" from another predefined array of strings. Fires if there are no interactive sessions on the server at 8:45am.
xxx: (and the oscar goes to) fuckingcoffee.sh - this one waits exactly 17 seconds (!), then opens an SSH session to our coffee-machine (we had no frikin idea the coffee machine is on the network, runs linux and has SSHD up and running) and sends some weird gibberish to it. Looks binary. Turns out this thing starts brewing a mid-sized half-caf latte and waits another 24 (!) seconds before pouring it into a cup. The timing is exactly how long it takes to walk to the machine from the dudes desk.
xxx: holy sh*t I'm keeping those
Credit: http://bit.ly/1jcTuTT
The bash scripts weren't bogus, you can find his scripts on the this github URL:
https://github.com/narkoz/...53