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.

Root interviews for a job

So I've been interviewing for fun lately (and for practice), and it's been going mostly well. This one company in particular looks interesting, and they seem to really like me. This morning was interview #4 with them; tomorrow morning is #5.

The previous interviews were pretty enjoyable, especially the last one where I interviewed with one of the senior devs who gave me his "grumpy old man rails quiz." He actually asked some questions I wasn't able to answer! (Mostly dealing with Rails' internals.) Also when showing me the codebase, there were a few things I hadn't seen before, so it's exciting that I'll actually be able to learn something if I sign on. We ended up talking for almost an hour past our allotted time, and we got along famously. He said he was very surprised I did so well on his quiz because most people don't. Everyone else I interviewed with so far has liked me and gave positive reviews, too.

I don't know if I want the job, but that's beyond the scope of this rant anyway. The real reason for this comes next.

My interview today was with the VP of engineering. It was more of a monologue, as he wanted to give me perspective to see if I actually wanted to work there, but it was still very much a monologue. He's an old white guy who seems to loves to drone, and he never seemed very happy when I responded, so I let him drone and drone. Good information though.

But he's very set in his ways in some regards, and two of them were pretty insulting. We never really talked about technicals, and he just assumed that since I wasn't old and graying that I was a junior dev. He said, and I'll quote: "We run a lean but senior team, so we typically only hire senior devs here. But the dev team is all old white men. There's no diversity in talent, age, sex, race, religion, etc, and I'm looking to change that." He made several more allusions to my more junior level, too. He made a lot of assumptions (like how I'm not comfortable with structure because I've been the only dev so often) and got annoyed when I countered them.

I realize he has no idea of my skill level -- even though he should if he was listening to his team -- but to just assume that I'm not talented because I'm young, and bloody hire me just because I'm female? I don't want to be your diversity hire, old man. 🤬

So I'm feeling angry.
I might still take the job because the it offers considerable benefits over where I'm working (despite being quite happy here), but it will absolutely be despite him.

Xkcd's epic rant on git. How deep have you explored git internals?

Just went to the new cafe next to me (all over the top fancy as usual around here), thought after a long time I could and should enjoy a nice drink, snack and a great view while coding.

Got two babies screaming out their internals right when I've paid and sat down, then an old guy started asking me to leave multiple times, threatening to call the police and trying to drag me off my chair, because I "shouldn't be breaking other peoples computers" - most likely because I was pulling+compiling evince via yay and he caught a glimpse of it when I checked if it finished or not.

One of the employees saw that happening and kicked the old guy out, then gave me a fresh donut as a "sorry", was for sure the best donut I've ate, not because of the taste, but because I saw the old guy then hovering across the street and occasionally giving me a look, as if he's waiting for the FBI to finally show up and he could tell where I escaped to.

tbh when the employee was approaching, I've seen this turn into a completely different rant, positively surprised there's still some sane people out there.

Hello everyone, this is my first time here so hi! I want to tell you all a story about my current situation.

At 18 while in the military I was able to get my first computer, it was a small hp pavilion laptop with windows 7. The system would crash constantly, even though I would only use it for googling stuff and using fb to talk to people. 5 months after I got it and continuously hated it decided to find out why and who could I blame (other than myself) for the system making me do the ctrl alt del dance all the time....

Found out that there are people called computer programmers that made software. Decided to give it a go since I had some free time most days. Started out with c++ because it was being recommended in some websites. Had many "oh deeeeer lord" moments. After not getting much traction I decided to move to Java which seemed like an easier step than C++. Had fun, but after some verbosity I decided to move into more dynamic lands. Tried JS and since at the time there was no Node and I was not very into the idea of building websites I decided to move into Python, Ruby, PHP and Perl and had a really great time using and learning all of them. I decided to get good in theoretical aspects of computer programming and since I had a knack for math I decided to get started with basic computer science concepts.

I absolutely frigging loved it. And not only that, but learning new things became an obsession, the kind that would make me go to bed at 02:40 am just to wake up at 04:00 or 06:00 because the military is like that. I really wanted to absorb as much as I could since I wanted to go to college for it and wanted to be prepared since I did not wanted to be a complete newb. Took Harvard CS50, Standford Programming 101 with Java, Rice's Python course and MIT's Python programming class. I had so much fun I don't regret it one bit.
By the time I got to college I had already made the jump to Linux and was an adept Arch user, Its not that it was superior or anything, but it really forced me to learn about Linux and working around a terminal and the internals of the system to get what I want. Now a days I settle for Fedora or Debian based systems since they are easier and time is money.

Uni was a breeze, math was fun and the programming classes seemed like glorified "Hello World" courses. I had fun, but not that much fun, most of my time was spent getting better at actual coding. I am no genius, nor my grades were super amazing(I did graduate with honors though) but I had fun, which never really happened in school before that.

While in school I took my first programming gig! It was in ASP.NET MVC, we were using C#, I got the job through a customer that I met at work, I was working in retail during the time and absolutely hated it. I remember being so excited with the gig, I got to meet other developers! Where I am from there aren't that many and most of them are very specialized, so they only get concerned with certain aspects of coding (e.g VBA developers.....) and that is until I met the lead dev. He was by far one of the biggest assholes I had ever met in my life. Absolutely nothing that I would do or say made hem not be a dick. My code was steady, but I would find bugs of incomplete stuff that he would do, whenever I would fix it he would belittle me and constantly remind me of my position as a "junior dev" in the company saying things as "if you have an issue with my code or standards tell me, but do not touch the code" which was funny considering that I would not be able to advance without those fixes. I quit not even 3 months latter because I could not stand the dick, neither 2 of the other developers since the immediately resigned after they got their own courage.

A year latter I was able to find myself another gig. I was hesitant for a moment since it was another remote position in which I had already had a crappy experience. Boy this one was bad. To be fair, this was on me since I had to get good with Lumen after only having some exposure to Laravel. Which I did mentioned repeatedly even though he did offer to train me in order to help him. Same thing, after a couple of weeks of being told how much I did not know I decided to get out.

That is 2 strikes.

So I waited a little while and took a position inside another company that was using vanilla PHP to build their services. Their system was solid though, the lead engineer remains a friend and I did learn a lot from him. I got contracted because they were looking for a Java developer. The salary was good. But when I got there they mentioned that they wanted a developer in Java...to build Android. At the time I was using Java with Spring so I though "well how hard can this be! I already use Android so the love for the system is there, lets do this!" And it was an intense, fun and really amazing experience.

-- To be continued.

First time ranter here..

So I started to work in this big company with allegedly many talented devs.

All excited to start and learn a whole bunch of new stuff.

There was this dev, with gazillion years of experience.

We were working on a similar parts of the code base and he told me I should be reusing his module.

I opened the module sources to learn about its internals.

Oh boy...

To illustrate it best, Let’s say there was a function called foo.
It was doing one thing. There was also a function called foo1. Doing almost exactly the same thing. There was also fooA.
And I kid you not, there was a fooA1.
All of them were doing almost the same thing.

Almost all of the functions were documented. The documentation for foo would be:
“This does X. I don’t like how it does it, so there is foo1 which is better.”

Additionally, only 1 of the functions was in use...

It doesn’t end here.
There were functions named like:
cdacictad

You ask what it means?
Well it means “clean directory a copy it’s contents to another directory” of course...

Months later he is no longer with us. I deleted this module.

PS
Glad to be here ;)

In electronics there's 3 options.
1. You pay a small fortune to get something decent.
2. You pay a smaller fortune to get crap.
3. You build it yourself and it'll be nicely priced AND decent.

Why is that? I have no idea. Profiteering gluttons perhaps.

Case in point: my watch. A waterproof one, so you'd expect to be able to take it in the shower, which I often did.
But then, le wild drop from 50cm height occurred and the whole thing just popped open, with soapy water rushing in. Luckily it didn't short out, and I quickly evacuated it out of the shower and dipped it with my towel.

Then already I thought.. what the fuck is wrong with the designers of this thing?! I'm all for keeping the inner parts of electronics accessible for self-servicing. But in a waterproof watch you wouldn't expect the backside to pop right off and expose the bloody internals, would you? So that's one thing. While evacuating it I quickly figured that I'd want to remove the battery immediately.. except that fucking thing was screwed in place?! WHAT THE FUCK?!! Use those screws to keep the fucking backside of the watch in place you certified pieces of shit that designed this craptacular piece of garbage!!!

Finished showering, went ahead and troubleshooted the thing. Miraculously it still worked. Except that now the UI of the fucking thing is biting me in the ass. A single button on the watch is used to operate the whole thing, and get it to set itself to the correct time, get radio signal, go in sleep mode (where the watch stops ticking, for storage purposes) and activate itself again. So I dived into the manual.. and still couldn't get it to work properly. So it's got one button just like an iPhone, it craps itself when it's dropped just like an iPhone, its design is shit just like an iPhone, and it's completely unusable when it craps itself just like an iPhone.

And the manual... Oh fucking shit. It specifies that the watch is 3 bar water resistant, yet apparently you can't take it into the shower. 3 FUCKING BAR!!! That's supposed to enable you to take a fucking dive with it! And apparently you can't drop it either.. who would've thought, when they lock it with no more than outwards pressure from the back plate into the main body! How difficult can it be to use fucking screws, and to make it watertight put some rubber bands or whatever?!

CERTIFIED MOTHERFUCKERS!!!

And the watch, it's in the garbage can right now. Right where it belongs!!

Legacy code.

Honestly though, this is some of the better legacy code I've worked with at this company. It's a nifty alert system wherein you can trigger sending messages to subscribers of that alert via whatever means (phone/email) they've entered.

I'll save you the technical analysis of its internals, but suffice to say it's actually pretty nice, with good separation of concerns, internal logic hidden away, dead-simple public interface, etc. documentation is kinda crap, but it exists (!), so that's a nice change.

but.

For some unknown and bloody bizarre reason, the thing breaks when a user wants both sms AND email notifications. Either by themselves work totally fine, but both together? nonono. Email alerts give ArgumentErrors, so something internal isn't correct, and SMS alerts complain about uninitialized Twilio::Error constants.

but.
they both work fine otherwise?

also, the two notification preferences aren't stored on the same object anywhere. if a user wants both, the user creates two AlertContact objects with different info, and when performed, the Alert basically iterates over these and does its thing for each, so there is no knowledge shared between them. totally should work the same regardless.

idfgi.

ALSO.
AND THIS PART REALLY PISSES ME OFF.

WHEN THERE'S AN ERROR, THIS THING DOESN'T LOG IT. IT STRINGIFIES THE ERROR OBJECT (basically just extracting the message) AND INSERTS THAT INTO THE DATABASE INSTEAD. WHAT THE CRAP.

So, I don't get a stack trace, line number, or anything. just the basic error message. instead of my alert text. because of course that makes sense and totally helps debugging.

aklsjfak;sldfj.
legacy code.

DISCLAIMER: UNPOPULAR OPINION

I'm tired of the Linux community, they effectively discourage me of taking part in any discussion online

I'm currently making Windows-only soft, some game stuff, some legacy DirectX stuff you got it.

Everytime I go online, this shitty pattern happens, when I stumble upon a problem in project I don't know how to fix and I ask for help
These are responses
- HA, HA, WINDOWS BAD, HA, HA, GET REAL SYSTEM
- In Linux, we can do X too. I mean it has 4x less functionality and way shittier UX and is even harder to implement but it can probably work on too Linux, so it's better, yes, just move to Linux
- btw you didn't like Linux before? Try this distro man, it's better <links random distro>

Is there anything valuable in the Linux community? I feel like these people don't like Linux anyway, they just hate Windows. Every opinion, tip is always opinion based. Anyone who works on internals knows how much better and how well thought is Windows kernel compared to Linux kernel. Also, if someone unironically uses Linux distro on desktop PC then he's a masochist because desktop Linux is dieing. So many distros ceased work only this year.

Is it a good tool for servers and docker containers? I don't have my head stuck up my ass to admit that yes, it's much better than Windows here.

This community got me stressed right now, I fear that when I go to bathroom or open my microwave there's gonna be a Linux distro recommendation there

😠😡😠😴

Dear customer support chaps,

I get that you can't help me with my issue. I get that you're only a subordinate of the sales people with no clue about the internals of whatever you're selling. I really get that.. if you knew, you wouldn't be sitting there, dealing with users.

However if I ask you something that you don't know, and I explicitly mention that you should please escalate this to an engineer or someone who knows the answer to my question, JUST FUCKING DO IT ALREADY!!! Put that fucking underserved pride aside for a moment, how difficult can it be?!!

So I'm back from vacation! It's my first day back, and I'm feeling refreshed and chipper, and motivated to get a bunch of things done quickly so I can slack off a bit later. It's a great plan.

First up: I need to finish up tiny thing from my previous ticket -- I had overlooked it in the description before. (I couldn't test this feature [push notifications] locally so I left it to QA to test while I was gone.)

It amounted to changing how we pull a due date out of the DB; some merchants use X, a couple use Y. Instead of hardcoding them, it would use a setting that admins can update on the fly.

Several methods deep, the current due date gets pulled indirectly from another class, so it's non-trivial to update; I start working through it.

But wait, if we're displaying a due date that differs from the date we're actually using internally, that's legit bad. So I investigate if I need to update the internals, too.

After awhile, I start to make lunch. I ask my boss if it's display-only (best case) and... no response. More investigating.

I start to make a late lunch. A wild sickness appears! Rush to bathroom; lose two turns.

I come back and get distracted by more investigating. I start to make an early dinner... and end up making dinner for my monster instead.

Boss responds, tells me it's just for display (yay!) and that we should use <macro resource feature> instead.

I talk to Mr. Product about which macros I should add; he doesn't respond.

I go back to making lunch-turn-dinner for myself; monster comes back and he's still hungry (as he never asks for more), so I make him dinner.

I check Slack again; Mr. Product still hasn't responded. I go back to making dinner.

Most of the way through cooking, I get a notification! Product says he's talking it through with my boss, who will update me on it. Okay fine. I finish making dinner and go eat.

No response from boss; I start looking through my next ticket.

No response from boss. I ping him and ask for an update, and he says "What are you talking about?" Apparently product never talked to bossmang =/ I ask him about the resources, and he says there's no need to create any more as the one I need already exists! Yay!

So my feature went from a large, complex refactor all the way down to a -1+2 diff. That's freaking amazing, and it only took the entire day!

I run the related specs, which take forever, then commit and push.

Push rejected; pull first! Fair, I have been gone for two weeks. I pull, and git complains about my .gitignore and some local changes. fine, whatever. Except I forgot I had my .gitignore ignored (skipped worktree). Finally figure that out, clean up my tree, and merge.

Time to run the specs again! Gems are out of date. Okay, I go run `bundle install` and ... Ruby is no longer installed? Turns out one of the changes was an upgrade to Ruby 2.5.8.

Alright, I run `rvm use ruby-2.5.8` and.... rvm: command not found. What. I inspect the errors from before and... ah! Someone's brain fell out and they installed rbenv instead of the expected rvm on my mac. Fine, time to figure it out. `rbenv which ruby`; error. `rbenv install --list`; skyscraper-long list that contains bloody everything EXCEPT 2.5.8! Literally 2.5 through 2.5.7 and then 2.6.0-dev. asjdfklasdjf

Then I remember before I left people on Slack made a big deal about upgrading Ruby, so I go looking. Dummy me forgot about the search feature for a painful ten minutes. :( Search found the upgrade instructions right away, ofc. I follow them, and... each step takes freaking forever. Meanwhile my children are having a yelling duet in the immediate background, punctuated with screams and banging toys on furniture.

Eventually (seriously like twenty-five minutes later) I make it through the list. I cd into my project directory and... I get an error message and I'm not in the project directory? what. Oh, it's a zsh thing. k, I work around that, and try to run my specs. Fail.

I need to update my gems; k. `bundle install` and... twenty minutes later... all done.

I go to run my specs and... RubyMine reports I'm using 2.5.4 instead of 2.5.8? That can't be right. `ruby --version` reports 2.5.8; `rbenv version` reports 2.5.8? Fuck it, I've fought with this long enough. Restarting fixes everything, right? So I restart. when my mac comes back to life, I try again; same issue. After fighting for another ten minutes, I find a version toggle in RubyMine's settings, and update it to 2.5.8. It indexes for five minutes. ugh.

Also! After the restart, this company-installed surveillance "security" runs and lags my computer to hell. Highest spec MacBook Pro and it takes 2-5 seconds just to switch between desktops!

I run specs again. Hey look! Missing dependency: no execjs. I can't run the specs.

Fuck. This. I'll just push and let the CI run specs for me.

I just don't care anymore. It's now 8pm and I've spent the past 11 hours on a -1+2 diff!

What a great first day back! Everything is just the way I left it.

The fucking hubris on some people... If you don't understand git, in a shop that uses git, how in the name of fucking odin's nutsack do you think you're qualified to be a senior dev? I'm not talking understanding the internals of git, I'm talking knowing WTF a branch even is! Oh, I know, its because you eat lunch with the bossman! Cronyisn is alive and well folks! Now I gotta fix all this shit, or its my fault...

So recently I did a lot of research into the internals of Computers and CPUs.
And i'd like to share a result of mine.

First of all, take some time to look at the code down below. You see two assembler codes and two command lines.

The Assembler code is designed to test how the instructions "enter" and "leave" compare to manually doing what they are shortened to.

Enter and leave create a new Stackframe: this means, that they create a new temporary stack. The stack is where local variables are put to by the compiler. On the right side, you can see how I create my own stack by using

push rbp
mov rbp, rsp
sub rsp, 0

(I won't get into details behind why that works).

Okay. Why is this even relevant?
Well: there is the assumption that enter and leave are very slow. This is due to raw numbers:
In some paper I saw ( I couldn't find the link, i'm sorry), enter was said to use up 12 CPU cycles, while the manual stacking would require 3 (push + mov + sub => 1 + 1 + 1).

When I compile an empty function, I get pretty much what you'd expect just from the raw numbers of CPU cycles.

HOWEVER, then I add the dummy code in the middle:

mov eax, 123
add eax, 123543
mov ebx, 234
div ebx

and magically - both sides have the same result.

Why????

For one thing, there is CPU prefetching. This is the CPU loading in ram before its done executing the current instruction (this is how anti-debugger code works, btw. Might make another rant on that). Then there is the fact that the CPU usually starts work on the next instruction while the current instruction is processing IFF the register currently involved isnt involved in the next instruction (that would cause a lot of synchronisation problems). Now notice, that the CPU can't do any of that when manually entering and leaving. It can only start doing the mov eax, 1234 while performing the sub rsp, 0.

----------------

NOW: notice that the code on the right didn't take any precautions like making sure that the stack is big enough. If you sub too much stack at once, the stack will be exhausted, thats what we call a stack overflow. enter implements checks for that, and emits an interrupt if there is a SO (take this with a grain of salt, I couldn't find a resource backing this up). There are another type of checks I don't fully get (stack level checks) so I'd rather not make a fool of myself by writing about them.

Because of all those reasons I think that compilers should start using enter and leave again.

========

This post showed very well that bare numbers can often mislead.

Finally found a great time to go through this intensive book on Kernel Internals ♥️

Wrote some code that solved a program in a semi unique way for the codebase. As in not oft used functionality of language.

Some time later... This might be hard to understand. Maybe I should do a different way.

Some time later... No, I will leave a comment to describe what is going on.

Some time later... That comment is kind of cryptic. Maybe should rethink.

Some time later... No, if the next dev doesn't know how this works then they should learn how it works. (reasoning here is that the functionality requires a knowledge of internals of language)

Some time later... Also, if nobody else gets this then they have to ask me how it works. Job security?

Some time later... STOP THINKING ABOUT THIS CODE AND MOVE ON!

2 in 1

How I fucking hate people that are over apologetic, but don't actually learn anything out of it, maybe next time you do the same fucking mistake again, I'll shove a fucking spiked metal rod up your ass and twist it, so next time you sit down you seemingly still fucking feel it and remember to check beforehand to avoid the fucking issue, you fucking buffoon.

--

Another thing I'd stick a rusty crackneedle pipe up somebodys internals is "for each day late we will penalize 500$ from the budget" while the budget is like 2k, go fuck yourself and eat your cash, with your "30 day challenge" job, you fucking cumstain.

So the company I provide service to decided to remove the microwaves and fridges from the breakroom in favor of the restaurant of the company.

But since I'm a service provider external of the company, I have to pay fees to eat at the room of the restaurant, plus the price of the menu of course. And we were quite several externals (even some internals) that think the price are/were too expansive and used the microwaves.

Well, fuck you, I'm going to bring my own food.
Needed a rant.

I think the reason why git beginners have a hard time with it is because the api is a bit untuitive.

For example: if you want to "unstage" staged changes, you run git reset, and if you want to "delete" those changes from your working copy, you git checkout those files.

But then, you find out that you can do all of that if you git add . and git reset --hard.
So you're like "huh..."

And then you discover that if you end the resethard with a branch name/commit id then you also make current branch point to the commit or that branch/commit (respectively).
So you're like "huh..."

And also if you add a commit id or branch name to git checkout, you change the current branch to specified/enter detached state with HEAD pointing to that commit (respectively).

Oh and you don't use git branch to create branches, you use git checkout -b because it's a lot shorter.

So here's a rundown: git reset mutates things related to files, but also mutates things related to branches.
git checkout also mutates things related to files and mutates things related to branches too (in a diff way). Also, creates new branches.

I don't think this is intuitive. We users use the same commands for different purposes with just a different flag.
Commands shouldn't mutate different types of things. But don't composite commands (as in, "smart" commands that mutate different things) shoudln't be a flag in an existing command, it should be a single new command of its own.

Maybe if I reread the internals of git now, I'll be able to disgest the dozens of technical terms they throw at you (they are many). And in my mind, the api will cognitively fit to the explanations.

Here's another one that feels weird too.
If you want to make your changes start on top of someone else's commit, you do git rebase.
But git rebase -i can be used for that, and also to delete, modify changes or message of, reorder or combine previous commits of the current branch.

Maybe the reason why several things we do overlap with the same commands is because they internally do similar things, and while not separating those commands might make it less intuitive, it makes them more sensible? i dunno...

disclaimer: I'm not setting this opinion in stone though, and am aware that git was created by one of the most infuential programmers.

So I'm a freelancer celebrating my second year at this one client (yes, times are good). When I first got to my current (not customer-facing) project, lots of "externals" (other freelancers) had come and gone, "internals" had been assigned and reassigned to and from this project and nobody knew exactly what was in the (angularjs) codebase.

One of my first
"quick win" assignments was to see if load times could be reduced. After some looking around it turned out someone had used moment.js (with locales, 67k gzipped) for some feature that had since been abandoned... and then accidentally dropped it into the source folder, checked it into source control (svn!), from whence it was happily packaged by the CI job and released every month.

Removing it reduced the pre-render javascript by about 40%. (also yes, that said "nobody knew exactly what was in the client-side codebase")

Today I had plans to refresh my knowledge about transactions' internals in dbms and in general.

Then the rainy weather hit the town. The whole sleepy day wasted on Netflix.

Well.. I guess it was time for a break :) haven't had one in weeks

At one point I understood a lot of git internals. Now I don't remember shit apart from the small subset of commands that I use everyday.
How does one remember such intricacies.
Also same with regular expressions xD

More adventures in fixing specs.

This particular failing spec is in an included spec helper; I cannot run the spec itself because rubymine is stupid and doesn't know how. Not kidding. I also don't know the codepath it's actually testing because it's fucking convoluted, so I need (rather: want) a debugger to progress. I put breakpoints everywhere I thought it could be, and... nothing.

The stacktrace shows the calling spec in the helper module, a generic `process` method that just calls `super` (from where? who knows!), and a `wrap_every_action` in the ApplicationController. in other words: absolutely nothing helpful. I stepped through the code for most of an hour and didn't get anywhere; just saw lots of rails internals.

ugh,

I'm going to keep bashing my head against this, but what the fuck, why can't you give me something goddamn useful!?

Any good tutorials for learning linux internals out there? I'm baffled by what are /etc, /opt, and so forth...

Seriously swimming in murky waters for now.

Also, what are your launchers of choice? I am contemplating should I dig into unity / dash, or try smth else?

@linuxxx

A friend of mine asked me yesterday for help for his bachelor thesis.

He wants to write about MySQL internals in regards to BLOB storage / usage.

We had a veeeerrrry long discussion....

And found a loooot of scary internet pages.

It's so .... Insane....

What some people with doctor titles or higher education generate...

Isn't content. More poo...

Most "blogs" / "articles" or whatever the author named it were missing all kinds of relevant data (version, configuration, anything relevant) but full of opinionated / biased bullshit.

Highlights were:
- we store lot of BLOB data, Backups take long and require more space
(you store additional data in an database, whaddya expect???!!!!)

- interesting guesswork about locking without any reference (interesting since it was sometimes so far away from reality that it looked more like quantum physics)

- storing blobs means that _each_ blob entry will be stored in a separate file (without any reference, but if an RDBMs did that... It would end in an amazing fireball I guess)

- BLOB's bad since it can represent only the file content, the database cannot distinguish wether it's an MP3 / MPG or anything like that...

(Ehm. Yeah. And an database cannot distinguish if you store under "Name" an Name or gibberish?!)

I somehow think that some people made an doctor and post this gibberish nonsense so people stay dumb to give them a job...

Like the TV repair men who steals the batteries from the remote.

Even conspiracy theories were more convincing

A little reflection on the relationship between me/my dad/computer:

When i was younger my dad showed and taught me how to work on his (10 - 15yrs+ old) laptop running windows xp. Soon we got a simple desktop pc (those ones that took nearly a minute to start). i remember my dad sayin something like "don't download anything cause (the pc will brake/it will be a virus/...)", I don't remember exactly ... but i know that i still did it (being fucking nervous😅) and it went well😌. later me and my little sister would go to "spielaffe.de" several times until getting some kind of "virus"😅😅.
Time passed and i got passionate about pc's (programming, trying Ubuntu, reading about internals of a pc,...). It didn't take long that i passed my dad's knowledge and so here i am studying CS😎.
In the end, regarding my dad:
first he was the master i looked up to, then he became the buddy i talked to and asked for problems, then ... he remained the light user who would like to return to his windows xp era and asks me first as his personal google when something happens out of his "comfort-zone"😅😌.
And sometimes i believe my dad is becoming incompetent for pc's😂😅

The default USB voltage hould have been specified to 6 instead of 5 volts.

Six (6) volts would allow for longer cables than five (5) volts do, since the spare voltage compensates for the resistance of cables. This is even more crucial for USB hubs. USB hubs are highly dependable upon these days due to laptop vendors dropping the number of USB ports down to two or even one. I am looking at you, Medion.

If several devices are connected to a USB hub, the voltage can quickly drop below 4.5 volts due to the resistance between the USB hub ports and the computer's USB port, causing some devices to restart themselves even if the computer's USB port is not over capacity. If it were over capacity, it would just regulate down its output voltage to prevent overcurrent.

Lithium-ion batteries need at least 4.3 volts arriving at the battery terminals to fully charge, and mobile devices are typically not equipped with a boost converter. Even if they were, they are rather inefficient, meaning they would produce significant heat and waste a power bank's energy. Other USB devices such as flash drives and peripherals might power off below 4.5 volts. However, 6 volts have solid 1.7 volts of margin to 4.3 volts, more than twice the margin of 0.7 volts that 5 volts have. On the way from the power supply to the end device, the voltage has to pass several barriers which weaken it, including the cable, connector endings, and the end device's internals such as the charging controller.

Sure, there are quick charging standards such as by Qualcomm and MediaTek which support elevating voltages to nine (9), twelve (12), and even twenty (20) volts. However, they require support by both the charger and mobile device. If six (6) volts were the default USB voltage, all devices would have been designed to accept this voltage, and longer cables could have been used anywhere. Obviously, all USB devices should be able to run on five volts as well.

Six volts would have been more stable, flexible, and reliable.

I remember when I was in elementary school, there was a teacher, who taught me and 3 other kids, how a PC works and how to use it. He booted it up and told us that it would take quite some time before interaction was possible (a few minutes?). He described it as a person that just got up. It would first stretch, get some breakfast, so on and so forth.... those memories😌😁😅
Today I know that the hard drive and the CPU (and the other internals) were just fucking slow...😂

Not really coding, but debugging complex problems. I love it when I have to dive in head-first and dig (very) deep to find answers to super-complex problems. I once went into the internals of a programming language to understand why a library was acting up in a particular scenario. Another time I had to optimize and re-compile from source (after modifying it) so that the application would not leak its memory. (Of course, I contributed it back to the language).

The inner satisfaction that you get after all that hard-work when it finally works, pays off! Bliss!

FREE CHEGG ANSWERS GUYS!!!
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Just copy the link of the chegg questions in the comment section and i'll post the answers ASAP.

You can also help any of your friend about telling this so i can help him/her out with any chegg solution for free.

#HELP EVERYONE waiting for many links lol... THANK YOU :)

So, our university has this something called "E-LAB", a portal where students copy and paste codes from hacker-earth, in order to get marks in their internals.
The fun part is, the questions in our online portal are itself copied from hacker-earth, and other technical platforms.
And even funnier, our faculties can't solve a single problem, and they expect us to do, 80+ out of 100.
I mean, WTF!!!

Allright, so now I have to extend a brand new application, released to LIVE just weeks ago by devs at out client's company. This application is advertised as very well structured, easy to work on, µservices-based masterpiece.

Well either I lack a loooot of xp to understand the "µservices", "easy to work on" and "well structured" parts in this app or I'm really underpaid to deal with all of this...

- part of business logic is implemented in controllers. Good luck reusing it w/o bringing up all the mappings...
- magic numbers every-fucking-where... I tried adding some constants to make it at least a tiny bit more configurable... I was yelled at by the lead dev of the app for this later.
- crud-only subservices (wrapped by facade-like services, but still.. CRUD (sub)services? Then what's a repository for...?). As a result devs didn't have a place where they could write business logic. So business logic is now in: controllers (also responsible for mapping), helpers (also application layer; used by controllers; using services).
- no transactions wrapping several actions, like removing item from CURRENT table first and then recreating it in HISTORY table. No rollback/recovery mechanism in service layers if things go South.
- no clean-code. One can easily find lines (streams) 400+ cols long.
- no encapsulation. Object fields are accessed directly
- Controllers, once get result from Services (i.e. Facade), must have a tree of: if (result instanceof SomeService.SomeSubservice1.Item1) {...} else if (result instanceof SomeService.SomeSubservice2.Item4) {...} etc. to build a proper DTO. IMO this is not a way to make abstraction - application should NOT know services' internals.
- µservices use different tables (hats off for this one!) but their records must have the same IDs. E.g. if I order a burger and coke - there are 2 order items in my order #442. When I make a payment I create an invoice which must have an id #442. And I'm talking about data layer, not service or application (dto)! Shouldn't µservices be loosely coupled and be able to serve independently...? What happens if I reuse InvoiceµService in some other app?

What are your thoughts?

My Data Communication & Computer Networks (DCCN) teacher was the best teacher I've seen.

Teaching can be super hard. You're one against like sixty others who aren't interested in being there. To make that good learning environment, making the subject interesting etc, it not easy. Some justify that, "I can only bring the horse to the water" & proceed to just regurgitate whatever is on the book. Others cross question you & impose punishments - try to make you learn by fear.

But my DCCN teacher - she had the right balance between strictness & humour. So kids took her seriously (did homework, weren't late), yet never feared her - we felt comfortable asking doubts/questions.

She had some good tactics, like asking us to teach certian chapters - that made us learn better. She would revise them in the end also, incase we missed anything.

My best moment with her was when I scored the highest in my internals. She picked up my paper & showed the class - "see? Just two pages & he scored so much". There's was always those students who pump out a lot of stories/essays or whatever that comes to their mind about the topic in question. Lots of teachers just blindly give marks - "oh, s/he wrote this much, so it must be right".

But my DCCN teacher had zero tolerance for garbage. If you're wrong, you're wrong. Some even believe that the number of marks = number of lines you have to write!! Doesn't matter what you write. So, I was super glad when this teacher upped the standards.

!rant

Ranters, I would like your suggestion:

I have an early 2011 13" macbook pro with 4gb ram, 320gb hdd and <400 battery cicles, which I use mostly for web dev. I started to get some annoying slow downs since last osx update, and now I am trying to figure out what to do.

I could buy an SSD hd and a new set of 16gb ram (8gb x2) and replace the internals. This would increase the performance greatly.

Or I could sell it and buy a new Retina version (with 8gb ram and 128gb ssd), at the expense of not being able to update the ram or the hard drive in the future.

It is a ~$200 option against a $1200 one. What would you do if you were in my situation?

It's one of those days where I have absolutely zero fucks left to give.

Was up all night wrestling with a segfault stemming from compiler internals (assembly, no less - zero debugging symbols). Now I just power-cleaned the apartment and need a bowl.

My visceral hate of Spring.Net burns with the force of a thousand suns.

Almost everything it does is done wrong or solved better by other solutions.

Specifying which classes to instantiate from .xml files? Sure why not, compile type safety (the whole reason for using a static programming language) is obviously overrated and dependency based injection is surely impossible!
And for extra bonus points, now our client code must be aware of the internals of the service classes, and all of their references as well, because, encapsulation? Who cares.

Have you made an typo? Good fucking luck finding out from which of the 100 config files we have floating around...

And, because it has baked in AOP and Transactions its woven into the fabric of the project like a tapewom.

Of course this may just be how our "special snowflake" project uses Spring.

What makes it more painful is that I love good DI tools (ninject, castlewindsor, autofac, there are so many...) and we're stuck with this turd because 7 years ago some java devs couldn't be arsed to learn a new library...

I fucking hate the way we have test in our company. They're worse than useless. They test internals but don't test the actual fucking behavior. I just broke the dev branch with a stupid mistake - because of course one of the core behaviors of our app is not tested. But I had to fix tests in three places just because I removed a useless util in favor of using a built-in JS feature.

My mind is not stable.
Office work requires - Linux Internals (knowledge on kernel, Device Drivers, Yocto etc) & Networking ( security ) -> CR on C/C++
Office work also requires - Python for tool development
My personal project requires - NodeJs, React
And I also want to appear for Interviews so also require DS & Algorithm

I hope you don't judge me

I hate interviewing with these FAANG or FAACK companies. I just finished 3 rounds of mind torturing coding sessions involving some obscure algorithms that I was expected to come up with on the fly! Thinking that the hard part is over and next is the behavioral round, I just received an email from the recruiter telling me that the next round is some obscure Linux kernel internals I need to be ready for.
How do people get jobs at these companies?!!!

Unit testing with NSubstitute and Autofac
For the most part, I find it a lot simpler than SimpleInject (hmm) and Moq, which I have used previously.

But there are still some of those 'Oh, for fucks sake!'-gotchas.

I was trying to test a class today where I wanted to substitute all other methods in the class than the one I wanted to test == an actual unit test.

I had previously found out how to do this:

1. Make sure the methods that should be substituted are internal to allow substitution.

2. Substitute class with Substitute.ForPartsOf<T>(args)

3. Set up methods that should not be called with instance.When(a => a.Method()).DoNotCallBase()

This way, you can unit test a class properly and only call the method that you want to test, and also control the return values of the other methods if needed.

So as I said, I have used this before to great effect. But today I just could NOT get it to work! I checked and rechecked everything but the test code kept calling the implementations of the substituted methods!

I even called over another dev for help, but he couldn't see the problem either.

Aargh!

I scoured the internet, but everyone just told me what I already knew: follow the 3 steps, and all is well. Not so!

I ALMOST considered doing the test improperly, as in, increasing the scope beyond that of the method I wanted to test.

But then it hit me... My project was missing this line in AssemblyInfo.cs:

[assembly: InternalsVisibleTo("DynamicProxyGenAssembly2")]

I always add a line to make internals visible to the test project, but I had forgotten that NSubstitute needs this line as well to work properly.

Sometimes when a test fails it will tell you that you are missing this line. And sometimes it just doesn't work.

Maybe I will remember this in the future now. Maybe 😅

If I kept track of all the hours wasted on issues due to overloads of functions called ToList() it would probably make up a sizable portion of the project budgets.

If I call ToList on a query object, it looks like I'm trying to serialize the query definition into some kind of array. That's what it *should* do with that name. Bonus if the object implements some generic enumerable interface, ToList makes it call your database, you can just toss the query into some json serializer that blocks while calling ToList for you, and people end up doing exactly this because the code turned out so much neater.

Because that's the thing. It's like people implement it because it's "neat" and the user shouldn't care about its internals. How many tears would be shed by just calling it ExecuteAsync?

We have procedures in place, but nothing has been Enacted as of yet other than travel bans and inter division meeting. Pushing for all meetings to be phone or web. Day to day team internals have not been affected yet. There is discussion to split the teams up so not everyone in the office is at the office at the same time. Split via “shifts” so different project groups would work during different shifts to reduce contact with others. And then also working from home, some like it , I don’t because all my stuff I need is at the office, and the internet at my house isn’t capable of what I need. So the shifting works best for me. Kinda nice I like the 3rd shift option for software.

I have to switch from FreeBSD to Linux for a project because the implementation has to be done on a Linux box. So I now see the deep internals of Linux for the first time in 10 years and it still feels so unclean and chaotic. It feels so even more then I remember it to feel when I have left it. You guys are sure that this is the future?

I frikin' love updating Gitlab, every time I do, I feel a sense of dread that some part of the process breaks and I will have to dive head first into the huge thing, with almost no knowledge of how the internals work!

__readfsdword(0x30) because getting the PEB is cool

So I've been helping with recruitment at work for a lead developer. Our first stage is pretty standard for all levels and it essentially a technical interview because CVs are useless really. We're a C# house so we have questions on framework internals such as how the dictionary class is implemented, locking and thread synchronization techniques. Then some pen and paper coding excercises, like reverse array.

I'm not a big fan of these and I think they are too constrained to detail implementations and not about concepts.

So I ask what stuff do you do at your company to get an idea of some ones competency?

Holy shit Realm. This DB.... On Android it will crash if you access a reference to the db from a different thread than the one it was created from! 🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️

Why oh why can't they just have their own internals managing all the fucking thread they need? There's a reason they provide sync and async db access.

This basically means that my reference to a realm instance should always be tightly paired with the corresponding thread reference so that I can run my db queries on it.

👎

I've said it before and I'll say it again: I believe in theoretical study prior to proof of concept.

At least for me, it takes me a 100 times more time to make a proof of concept the 'quick and easy' way rather than properly studying the theoretical knowledge and then applying it.
For example, it took me one and a half months to build a small website in ReactJS without much prior knowledge. It took me exactly one day performing the same task when I properly had studied all its internals and theoretical knowledge before I started.

If I know what I'm doing, I can easily create; if I don't, then I'm just messing around, looping myself into problems ad infinitum.

Teach a man to fish..

Need an advice..We have to select a department elective this sem..What would you guys recommend...I am inclined towards Python and Linux internals but we have to choose only one. From the Department Elective 1.
I could also opt for something else other than these two.