Join devRant
Do all the things like
++ or -- rants, post your own rants, comment on others' rants and build your customized dev avatar
Sign Up
Pipeless API
From the creators of devRant, Pipeless lets you power real-time personalized recommendations and activity feeds using a simple API
Learn More
-
Interview with a candidate. He calls himself "C++ expert" on his resume. I think: "oh, great, I love C++ too, we will have an interesting conversation!"
Me: let's start with an easy one, what is 'nullptr'?
Him: (...some undecipherable sequence of words that didn't make any sense...)
In my mind: mh, probably I didn't understand right. Let's try again with something simple and more generic
Me: can you tell me about memory management in C++?
Him: you create objects on the stack with the 'new' keyword and they get automatically released when no other object references them
In my mind: wtf is this guy talking about? Is he confusing C++ with Java? Does he really know C++? Let's make him write some code, just to be sure
Me: can you write a program that prints numbers from 1 to 10?
Ten minutes and twenty mistakes later...
Me: okay, so what is this <int> here in angle brackets? What is a template?
Him: no idea
Me: you wrote 'cout', why sometimes do I see 'std::cout' instead? What is 'std'?
Answer: no idea, never heard of 'std'
I think: on his resume he also said he is a Java expert. Let's see if he knows the difference between the two. He *must* have noticed that one is byte-compiled and the other one is compiled to native code! Otherwise, how does he run his code? He must answer this question correctly:
Me: what is the difference between Java and C++? One has a Virtual Machine, what about the other?
Him: Java has the Java Virtual Machine
Me: yes, and C++?
Him: I guess C++ has a virtual machine too. The C++ Virtual Machine
Me (exhausted): okay, I don't have any other questions, we will let you know
And this is the story of how I got scared of interviews29 -
Each month my department compiles a 4M row 150 column data table for compliance with a federal agency. Before submitting, we check it against about 400 rules.
The existing system was simply 400 queries that ran in sequence, table-scanning 4M rows each time, taking upwards of 6 hours, which is a huge bottleneck, especially if you have to make changes and rerun. Plus the output was rather one-dimensional.
I built a proper normalized database and created a sort of rules engine, running all 400 rules in one table scan. Not only does it complete in 30 minutes, but the reports generate automatically, and the results can be filtered on several dimensions to aid with root-cause analysis.
Management was pleased.4 -
Was letting my five year old cousin play on my laptop today. She was writing numbers in notepad, and after typing '123', she erased them because she wanted to start over from 0 instead.
Later she started typing 1 and 0 repeatedly in random sequence.
She may be a robot. Either way, I sense a bright future ahead for her.2 -
Client: So you want 50 bucks for 5 minutes work pushing some buttons;
Me: Well yes. I didn't just pushed some buttons... I pushed them in the right sequence and solved your problem.8 -
- Password can't contain less than 3 chars
- Password can't contain more than 12 chars
- Password must contain only alphabetical and numerical chars
- Password must contain at least one uppercase letter
- Password can't contain a sequence of repetitive chars
- You already used this password in the past
- Password can't contain parts of passwords already used in the past
- Password can't contain your name, birthday or any other personal information
- Password can't be an anagram
- This password is too weak
"Remember that you have to update your password every 6 months".
Who the fuck has enough imagination to invent a new password that meets all these requirements every fucking 6 months?
And if so, how the fuck you can also remember it?
Fuck off… I don't really need access to my university account, right? 😡22 -
It's a perfect chronological sequence from left to right:
"I'll fix this bug in a jiffy"
"Fml i can't figure out whats wrong"
"I give up on life"
and then finally "Oh look, missing semicolon"
Pic taken at a Starbucks in MountainView CA
5 -
There are cybercrimes. That means you can be put to jail for performing certain actions with your computer. I’m taking about serious crimes like hacking crucial governmental servers but not about insulting people online. I’m talking about something that’ll make government chase you.
Every action at the computer could be done with keyboard only.
My face when there is finite sequence of keys that you press one by one and then become a criminal. And go to jail.
My face when if you put that sequence into script file, there is file that you double-click and instantly become criminal.
Press here to go to jail. The whole new level of abstraction.
Really makes me think.7 -
That would probably be implementing multithreading in shell scripts.
https://gitlab.com/netikras/bthread
The idea (though not the project itself) was born back when I still was a sysadmin. Maintaining 30k servers 24/7 was quite something for a team of merely ~14 people. That includes 1st line support as well.
So I built a script to automate most of my BAU chores. You could feed a list of servers - tens or hundreds or more - and execute the same action on each of them (actions could be custom or predefined in the list of templates). Neither Puppet nor Chef or Ansible or anything of sorts was consistently deployed in that zoo, not to mention the corp processes made use of those tools even a slower approach than the manual one, so I needed my own solution.
The problem was the timing. I needed all those commands to execute on all the servers. However, as you might expect, some servers could be frozen, others could be in DMZ, some could be long decommed (and not removed from the listings), etc. And these buggars would cause my solution to freeze for longer than I'd like. Not to mention that running something like `sar -q 1 10` on 200 servers is quite time-consuming itself :)
And how do I get that output neatly and consistently (not something you'd easily get with moving the task to a background with '&'. And even with that you would not know when are all the iterations complete!)?
So many challenges...
I started building the threading solution that would
- execute all the tasks in parallel
- do not write anything to disks
- assign a title to each of the tasks
- wait for all the tasks to complete in either
> the same sequence as started
> as soon as the task finishes
- keep track of each task's
> return code
> output
> command
> sequence ID
> title
- execute post-finish actions (e.g. print to the console) for each of the tasks -- all the tracked properties are to be accessible by the post-finish actions.
The biggest challenges were:
a) how do I collect all that output without trashing my filesystems?
b) how do I synchronize all those tasks
c) how do I make the inception possible (threads creating threads that create their own threads and so on).
Took me some time, but I finally got there and created the libbthread library. It utilizes file descriptors, subshells and some piping magic to concentrate the output while keeping track of all the tasks' properties. I now use it extensively in my new tools - the ones where I can't use already existing tools and can't use higher-level languages.4 -
So this post is going to target an irritating aspect of a specific culture based on observational evidence over the last 20 years, and has reared its hideous face yet again. If you're triggered by that, stop reading here.
I'm flatly fed up with two-faced onshore Desi coworkers. They make up 95% of my colleagues and the following sequence of events has played out repeatedly over the course of my career, consistently, though it's slightly more pronounced in other women for whatever reason :
1. Work with them for years, good relationship, teach them all sorts of skills (which I will do freely for anyone, for any reasons as I view it to be a moral imperative), general lifting up and solid teamwork.
2. They move up in the hierarchy, generally to management, usually project
3. The second they view themselves as higher in the pecking order they start treating me like shit as if we have no history. Rude, commanding, unwilling to share details, obligatory exasperated thank yous if any at all, not interested in anything I have to say even if I'm the noted expert on the subject.
I understand a lot of their etiquette culture, specifically the level of "directness" or politeness they employ is based on the estimated risk of loss in the interaction. I find that disgusting, but I understand that academically. I just can't get my mind around how universal this shiftiness is, as it happens over and over again. It's like human decency and respect go out the window the second they don't feel like they have anything to gain from you. In *my* culture that is the lowest form of behavior a human can exhibit, and it causes me to rage because I can't imagine being so utterly devoid of altruism.
Fuck. It's just so sickening. It's fucking debased, and selfish and greedy and fuck. I can't even, this is one of those things that so irrational my mind can't accept it and I just go around and around on it.
Tl;dr you want to get throat punched? Because that's how you get throat punched. It's definitely getting this person doxxed to USCIS12 -
* Colleague asks how to make a alias for IP address
* Open up notepad++ w/ admin rights and load C:\Windows\System32\Drivers\etc\hosts in
* add a new entry to map IP to the alias
* hit sequence [ENTER][ESC]:wq[ENTER]
* wonder why is notepad window still there... Did it freeze again?
... happens to me all the time :(4 -
Company : we added AI to our product!!
What i hear : we added a sequence of if and if else to our product 😂😂5 -
Lisp code was live-debugged and fixed with REPL on a spacecraft 100 million miles away
“An even more impressive instance of remote debugging occurred on NASA's 1998 Deep Space 1 mission. A half year after the space craft launched, a bit of Lisp code was going to control the spacecraft for two days while conducting a sequence of experiments. Unfortunately, a subtle race condition in the code had escaped detection during ground testing and was already in space. When the bug manifested in the wild--100 million miles away from Earth--the team was able to diagnose and fix the running code, allowing the experiments to complete. One of the programmers described it as follows:
Debugging a program running on a $100M piece of hardware that is 100 million miles away is an interesting experience. Having a read-eval-print loop running on the spacecraft proved invaluable in finding and fixing the problem.”
https://gigamonkeys.com/book/...4 -
Manager: I want you to make an architecture diagram for this system
Me, not sure what diagram but ok asking my senior then
Senior: You know those diagrams you learned in uni? Yeah, do whichever you think is suitable
Me, left to my own devices, makes a shitty use case and sequence diagram
Manager: We don't actually do diagrams like yours here. But I like it so lets stick with it.
😱 Ok. Cool.5 -
Why is GOTO deprecated and not recommend!?
It was fun in school days programming, I used to write code randomly then use GOTO to sequence it.
Did anyone had fun with GOTO!?15 -
A colleague of mine had to debug performance problems in a foreign, proprietary application that is ancient.
To be crystal clear: Only reason that thing exists is because some old geezers fear change.
Asked me for help cause it's an _ancient_ MS SQL server that is luckily running on hardware owned by us.
Finding the credentials was already a funny task.
We had to access the vault (not joking here, we have a physical vault for storing sensitive data and critical backups), grab a folder and find the necessary data cause no one ever dares to touch that thing.
The application is btw for a sort of ERP / inventory system that is used in some ancient shops not yet migrated...
Yeah. Story speaks for itself.
Anyway, after dusting off ourselves, we were able to connect.
Was a bit ... Interesting. Everything's in german. The worst kind of german.
After looking at the first tables, I started giggling.
My colleague knew immediately that this was a sign of danger (insert Simpson meme here), raised his eyebrows and asked "How bad is it....".
Me, still giggling, "lemme take a further look, this is gold".
*long sigh from the colleague*
Well... It ended with me putting my hands in front of my eyes, turning around and saying: "I cannot look at it anymore, it hurts too much...."
To summarize:
- German table names
- When a table exceeded 300 plus columns, they added another table with the same plus suffix "_ddd"… where ddd is an zero filled integer sequence like 001
- To join this mess, they created views... Named "generator" - Sequence Number ... Some had the beginning of table names appended, which doesn't make it less confusing.
- the process list was listing queries running longer than 5 mins.
Which isn't at all surprising when generating carrtesian products of N tables with left join.
I've seen shit.... I've seen a lot of shit.
But that shit scared me.1 -
Staying at friend's place bcz he had corei5 and I had p4 for uni project. We were making arch linux and package installation took whole night on slow net. Made bash script of possible sequence of commands and we slept.
In morning when we woke, it was perfect!1 -
PHP arrays.
The built-in array is also an hashmap. Actually, it's always a hashmap, but you can append to it without specifying indexes and PHP will use consecutive integers. Its performance characteristics? Who knows. Oh, and only strings, ints and null are valid keys.
What's the iteration order for arrays if you use them as hashmaps (string keys)? Well, they have their internal order. So it's actually an ordered hashmap that's being called an array. And you can produce an array which has only integer keys starting with 0, but with non-sequential internal (iteration) order.
This array weirdness has some non-trivial implications. `json_encode` (serializes argument to JSON) assumes an array corresponds to a JSON array if its keys are consecutive integers in increasing order starting with 0, otherwise the array becomes a JSON object. `array_filter` (filters arrays/hashmaps using callback predicate) preserves keys, so it will punch holes in the int key sequence if non-last items are removed, thus turning arrays into hashmaps and changing your JSON structure if you forget to discard keys before serialization.
You may wonder how JSON deserialization works, then? There's a special class for deserialized JSON objects, `stdClass`. It's basically a hashmap too, but it's an object, not an array, and all functions that would normally accept arrays won't work with it. So basically its only use is JSON (de)serialization. You can even cast arrays to objects, producing `stdClass`.
Bonus PHP trivia:
Many functions return nonsensical values. `preg_match`, the regex matching function, returns 1 for success, 0 for no matches and false for malformed regular expression. PHP supports exceptions, so it could just throw one on errors. It would even make more sense to return true, false and null for these three cases. But no, 1, 0 and false. And actual matches are returned by output arg.
`array_walk_recursive`, a function supposed to recursively apply callback to each element of an array. That's what docs say. It actually applies it to leafs only. It will also silently accept object instead of array and "walk" it, but without recursing into deeper objects.
Runtime type enforcing is supported for function arguments and returned values. You can use scalar types, classes, array, null and a few special keywords. There's also a `mixed` keyword, which is used in docs and means "anything". It's syntactically valid, the parser will accept it, but it matches no values in runtime. Calling such function will always cause a runtime error.
Strings can be indexed with negative integers. Arrays can't.
ReflectionClass::newInstanceWithoutConstructor: "Creates a new class instance without invoking the constructor". This one needs no commentary.
`array_map` is pretty self-explanatory if you call it with a callback and an array. Or if you provide more arrays of equal length via varargs, callback will be called with more arguments, one from each array. Makes sense so far. Now, you can also call `array_map` with null instead of callback. In that case it treats provided arrays as rows of a matrix and returns that matrix, transposed.5 -
"While the number of rabbits grows, the rabbits will grow in number."
Teacher explaining the Fibonacci sequence.2 -
Is it just the novice in me that finds the Haskell community's misguided obsession over character count really annoying? Learn You a Haskell For Greater Good states
> Shorter code means less bugs
A lot of people and resources seem to share this opinion, but it's obviously false. Simpler code means less bugs, but look at this function which just means "apply this applicative to each element of a list"
> sequence :: (Applicative f) => [f a] -> f [a]
> sequence = foldr (liftA2 (:)) (pure [])
This isn't "less buggy", it's fucking madness. The same in JS, the king of unreadable languages, would be:
function sequence(seq, val, apply = (f, x) => f(x)) {
seq.map(f => apply(f, val))
}
Seriously, how can you design a strictly typed language that gets beaten by JS in readability?16 -
It’s still to easy.
I hope one day software will get so complicated no one will be able to fix it.
Somewhere in future :
- government established law that new AI system is only one that can accept new law
- every financial operation is monitored by government supervision AI
- we developed robots that are taking care of us
- everyone is happy cause work for money, shelter and food is now optional
- education is fully digital and managed by AI
- whole knowledge is based on asking questions, we don’t need to write and read anymore
- we use one common language and our knowledge specialization increased
A little more time passed by in this utopia.
- after power loss most of data got corrupted
- last man who knew how to restore backup died last night ( R.I.P. admin we will not forget you )
- people trying to save knowledge base to rebuild part of this civilization but no one knows how to make a paper because it haven’t been used for ages
- we decided to put what is left from knowledge on stone but we forgot how to write since everything is audio or video and most of time we were spending in VR
- someone decided that we draw some pictures
- all of use are now drawing animal heads like we remember ourselves from VR, let people know our tech is good
- some people love cats so they try to make cats from stones
- volcano eruptions destroyed most of stones that we made
Starving waiting for another respawn of my DNA sequence. I hope we manage to survive this time.
4 -
As you can see from the screenshot, its working.
The system is actually learning the associations between the digit sequence of semiprime hidden variables and known variables.
Training loss and value loss are super high at the moment and I'm using an absurdly small training set (10k sequence pairs). I'm running on the assumption that there is a very strong correlation between the structures (and that it isn't just all ephemeral).
This initial run is just to see if training an machine learning model is a viable approach.
Won't know for a while. Training loss could get very low (thats a good thing, indicating actual learning), only for it to spike later on, and if it does, I won't know if the sample size is too small, or if I need to do more training, or if the problem is actually intractable.
If or when that happens I'll experiment with different configurations like batch sizes, and more epochs, as well as upping the training set incrementally.
Either case, once the initial model is trained, I need to test it on samples never seen before (products I want to factor) and see if it generates some or all of the digits needed for rapid factorization.
Even partial digits would be a success here.
And I expect to create multiple training sets for each semiprime product and its unknown internal variables versus deriable known variables. The intersections of the sets, and what digits they have in common might be the best shot available for factorizing very large numbers in this approach.
Regardless, once I see that the model works at the small scale, the next step will be to increase the scope of the training data, and begin building out the distributed training platform so I can cut down the training time on a larger model.
I also want to train on random products of very large primes, just for variety and see what happens with that. But everything appears to be working. Working way better than I expected.
The model is running and learning to factorize primes from the set of identities I've been exploring for the last three fucking years.
Feels like things are paying off finally.
Will post updates specifically to this rant as they come. Probably once a day.
2 -
I'll be honest, I've never understood why people say that numbers generated by a computer are pseudorandom and not random.
I know a lot of algorithms for number generation, and I implemented mine, based on time of invokation expressed in nanoseconds, taking digits, manipulating and transforming them. Then I analyzed the probability distribution and it's absolutely flat. So, if you know the Touring test, we can use a modified version of it. If I give you a sequence of random numbers generated by a computer and I give you a sequence of random numbers invented by a person, and you can't notice the difference, so the test is passed.
What's wrong on it?12 -
!rant
Arduino CNC
Hey guys.
Since I mostly see frameworks to use with G-Code in Arduino CNCs I'm gonna make my own framework, where you don't need to know G-Code and the code is executed by Arduino code.
The code would include a template to define steppers steps and such.
Would include a library to work with different stepper shields.
Would this interest to anyone?
I'll provide a full example with stuff to learn for any amateur working with CNCs or that want to work with one. If you're not interested, thank you for reading, you can stop here.
Ex:
X(10);
Y(-5.5);
XY(6,7.5);
Z(-10);
This framework would only use incremental coordinates and will work for basic forms, drilling and such.
<Tutorial>
Coordinates.
Coordinates can be relative/incremental or absolute.
Lets say you have a square with 10mm, (top coordinates: (X=0,Y=0) to (X=10,Y=10).
think your drawing this square.
First line:
X0, Y0
Absolute: x10,y0
Relative: X+10
Second line:
A: x10,y10
R: Y+10
Third Line (...)
Absolute is a fixed point (coordinate)
Relative is a distance to move (not a coordinate but the distance and direction)
</Tutorial>
So, to cut a square with a TR10 (end mill with radius=5, diameter=10)
<code>
// You don't place + in positive values
// The tool always cut in the direction of the tool rotation, meaning on the left of the material.
Z(10); // Security Distance
XY(-5,0); //Compensate the diameter of the tool in radius
Z(-1); // Z=0 is the top of the block to mill, in this case. Z=0 can also be in the bottom
Y(15); //Second Point
X(15); // Third Point
Y(-15); // Forth point
X-15; // Fifth Point
(repeat)
</code>
Now we have a block with 1mm depth. If you use a while or for you can repeat the sequence for x=n passages, change the value to Z for the depth and your done.31 -
Oh booy...
Once i worked with a classmate
Explaining to him what he has to WRITE IN THE CODE to do it. So i was dictating him...
On the start i told him "now write an int called num1 and then of course end with semicolon"
To which he replied"whats is int and semicolon"
I didnt hang up but if you want to see the sequence +1 the rant4 -
Meet today.... Fetlang
---
lick Bob's cock
lick Duke's left nipple one million times
while Ada is submissive to Duke
make slave scream Ada's name
Have Charlie spank himself
Have Ada lick his tight little ass
Have Bob lick Charlie's tight little ass, as well
make Ada moan Bob's name
make Bob moan Charlie's name
---
Never felt so dirty after calculating the fibonacci sequence...
https://github.com/Property404/...
"Fetlang is a statically typed, procedural, esoteric programming language and reference implementation. It is designed such that source code looks like poorly written fetish erotica."8 -
The ones who use it, what do you like or value about Linux? Why do you use it?
Before I answer, let me say that I am a noob compared to the rest of this community. I run Ubuntu because Arch was too complicated when I tried and bash scripts equal to frustrations for me. That's my knowledge level.
- I don't feel "observed" when using a Linux distro compared to Windows and macOS.
- Feel more connected to the open source thought and the free spirit.
- Feel like I can do anything I want. Learning new programming languages easily, trying out web servers, try and setup own website or mail server etc.
- Everything is accessible. Read something cool about docker? ALT+T to open a terminal and start up a docker container to try out.
- No Internet browsing for software, like googling "Firefox download english".
- Sometimes forces me to learn about the workings of a computer, like networks, servers, routing, firewalls, bootup sequence etc.
- So many great command line tools. Want to find out quickly who owns a website? Want to query a specific DNS server? All possible within 5 seconds!
All in all using Linux feels like watching a documentary while using Windows is more like watching a dumb comedy show where I can turn my brain off, but get more stupid after a while.6 -
Noticed a new version of our primary customer management application was deployed to my machine. Its been a while since I've seen it, so I decide to see all the 'improvements' over the 'old' one (~18 year old app written in Delphi).
Wow, it's slow, several seconds to open. Tried to open my account..really, really slow.
Notice a lonely edit box with no label, and button right next to it with no caption, so I click it and get the attached error.
Tried to place an order, I must have done something 'out of sequence' because I clicked another button and the whole app crashed.
In less than 5 minutes I found a dozen or so UX failures. I suck pretty bad at UI, but good lord...what the frack happened to basic usability.
1 -
Of all the fuckups I love the ones with all the wrongs the most.
Like one junior: restarted a wrong app component in a wrong environment on a wrong agreed time after updating a wrong property in the config file.
Like today one of my teammates: updated a wrong script to add a wrong step in a wrong spot in the sequence... At least got the environment right I guess..4 -
I've assembled enough computing power from the trash. Now I can start to build my own personal 'cloud'. Fuck I hate that word.
But I have a bunch of i7s, and i5s on hand, in towers. Next is just to network them, and setup some software to receive commands.
So far I've looked at Ray, and Dispy for distributed computation. If theres others that any of you are aware of, let me know. If you're familiar with any of these and know which one is the easier approach to get started with, I'd appreciate your input.
The goal is to get all these machines up and running, a cloud thats as dirt cheap as possible, and then train it on sequence prediction of the hidden variables derived from semiprimes. Right now the set is unretrievable, but theres a lot of heavily correlated known variables and so I'm hoping the network can derive better and more accurate insights than I can in a pinch.
Because any given semiprime has numerous (hundreds of known) identities which immediately yield both of its factors if say a certain constant or quotient is known (it isn't), knowing any *one* of them and the correct input, is equivalent to knowing the factors of p.
So I can set each machine to train and attempt to predict the unknown sequence for each particular identity.
Once the machines are setup and I've figured out which distributed library to use, the next step is to setup Keras, andtrain the model using say, all the semiprimes under one to ten million.
I'm also working on a new way of measuring information: autoregressive entropy. The idea is that the prevalence of small numbers when searching for patterns in sequences is largely ephemeral (theres no long term pattern) and AE allows us to put a number on the density of these patterns in a partial sequence, but its only an idea at the moment and I'm not sure what use it has.
Heres hoping the sequence prediction approach works.17 -
Hmm. So have you ever argued in a job interview? Like really standing your ground? In a technical interview?
Today I had a live coding session with a company I'm interested in. The developer was giving me tasks to evolve the feature on and on.
Everything was TDD. Splendid!
However at one point I had to test if the outcome of the method call is random. What I did is basically:
```
Provider<String> provider = new SomeProvider("aaa", "bbb", "ccc", "ddd", "eee", "fff")
for(int i=0; i<100; i++) {
String str = provider.get();
map.put(str, incrementCount(str));
}
Set<Integer> occurences = new HashSet(map.values());
occurences.removeIf(o -> o.equals(occurences.get(0)));
assertFalse(occurences.empty());
```
and I called it good enough, since I cannot verify true randomness.
But the dev argued that this is not enough and I must verify whether the output is truly random or not, and the output (considering the provider only has a finite set of values to return) occurences are almost equal (i.e. the deviation from median is the median itself).
I argued this is not possible and it beats the core principle of randomness -- non-determinism. Since if you can reliably test whether the sequence is truly random you must have an algorithm which determines what value can or cannot be next in the sequence. Which means determinism. And that the (P)RNG is then flawed. The best you can do is to test whether randomness is "good enough" for your use case.
We were arguing and he eventually said "alright, let's call it a good enough solution, since we're short on time".
I wonder whether this will have adverse effect my evaluation . So have you ever argued with your interviewer? Did it turn out to the better or to the worse?
But more importantly, was I right? :D21 -
Writing a truly crossplatform terminal library is the biggest pain in the ass.
And you thought windows was bad. They have a proper API with droves of features, freely allocatable screenbuffers, scrolling on both axes, etc.
Fucking xterm vtxxx compatible piles of shit are the problem.
Controlling kinda works eventhough the feature set is pretty bad. The really fucked up thing is reading values back. They literally get put into the input buffer. So you have to read all the actual user input before that and then somehow parse out the returned control sequence. Of course the user input has to be consumed so I have to buffer it myself. Even better is when you get a response with non printable characters which the fucking terminal will interpret as another control sequence. So when you set a window title to a ansi control sequence it would get executed when queried. Fuck this shit but I'm not giving up. I will tame this ugly, bodged together dragon7 -
!Rant
I'm going to be teaching my roommate how to "code" soon. Or rather, I'll be teaching her how to use Scratch, so she can have a leg up when she applies to work at a children's code academy that uses a Scratch-like environment. Should be fun!
I love that Scratch exists. Such an accessible way to teach basic concepts like loops, conditional statements, etc, with results that are way more fun than "oh look I output the fibinacci sequence"1 -
Still on the primenumbers bender.
Had this idea that if there were subtle correlations between a sufficiently large set of identities and the digits of a prime number, the best way to find it would be to automate the search.
And thats just what I did.
I started with trace matrices.
I actually didn't expect much of it. I was hoping I'd at least get lucky with a few chance coincidences.
My first tests failed miserably. Eight percent here, 10% there. "I might as well just pick a number out of a hat!" I thought.
I scaled it way back and asked if it was possible to predict *just* the first digit of either of the prime factors.
That also failed. Prediction rates were low still. Like 0.08-0.15.
So I automated *that*.
After a couple days of on-and-off again semi-automated searching I stumbled on it.
[1144, 827, 326, 1184, -1, -1, -1, -1]
That little sequence is a series of identities representing different values derived from a randomly generated product.
Each slots into a trace matrice. The results of which predict the first digit of one of our factors, with a 83.2% accuracy even after 10k runs, and rising higher with the number of trials.
It's not much, but I was kind of proud of it.
I'm pushing for finding 90%+ now.
Some improvements include using a different sort of operation to generate results. Or logging all results and finding the digit within each result thats *most* likely to predict our targets, across all results. (right now I just take the digit in the ones column, which works but is an arbitrary decision on my part).
Theres also the fact that it's trivial to correctly guess the digit 25% of the time, simply by guessing 1, 3, 7, or 9, because all primes, except for 2, end in one of these four.
I have also yet to find a trace with a specific bias for predicting either the smaller of two unique factors *or* the larger. But I haven't really looked for one either.
I still need to write a generate that takes specific traces, and lets me mutate some of the values, to push them towards certain 'fitness' levels.
This would be useful not just for very high predictions, but to find traces with very *low* predictions.
Why? Because it would actually allow for the *elimination* of possible digits, much like sudoku, from a given place value in a predicted factor.
I don't know if any of this will even end up working past the first digit. But splitting the odds, between the two unique factors of a prime product, and getting 40+% chance of guessing correctly, isn't too bad I think for a total amateur.
Far cry from a couple years ago claiming I broke prime factorization. People still haven't forgiven me for that, lol.6 -
So this i quite a big project, hundreds of files everywhere, pages are rendered using multiple files.
This is one of the latest created page, it was made by my boss, and it just give me the creeps.
I REALLY don't know how he always comes up with shit like these.
I just hate having more than 5 closing tags in sequence...
6 -
Every single stakeholder in my company tells me that I should be working on something different, every time I talk to them. For example - we've got some issues, that I've ranted on previously. I go to my manager, and tell him that it's going to take longer than I'd hoped, because the author of this part of the codebase wasn't familiar with functional programming or OOP, didn't document anything, and just generally produced an unmaintainable, borderline indescribable mess. The next guy after him made it all so much worse, because they're both a couple of tryhard douchebags, and I hope they fucking die. For real. I hope fire ants are involved.
Anyway, getting carried away there, whew. So I tell my manager that we'd be further ahead just replacing the code, because it's only doing a couple of things, and should not be so complex. He says "cool, but what you really need to be doing is rebuilding this other thing." So I switch gears and work on that other thing until I hit a point that requires the input of another stakeholder. I go to talk to this guy, and all hell breaks loose "why are you working on that, this is higher priority", and I explain the sequence of events. Manager denies having said what he said, I look like an asshole, yet again. Then the old "this should be simple, just change this" from the dudes who don't know code, and don't want to know. I try to explain, offer to show them precisely why their "simple ask" is anything but, but they just start screaming about how they hate technology. Yeah, well me fucking too. I keep hearing about how much "job security" I have, but man I'm going to lose my mind at this rate. I have seventeen motherfucking things that are "emergencies", and as many fucking dumb ass unintuitive workflows to go through to get them changed. All on production, because this place is fucking stupid. Just let me discard this shitty legacy code and be done with it already. FUCK.
Thank fucking fuck it's friday. In about six, seven hours, my goal is to be so fucking wasted that I can't feel my face. Get drunk, play with the dog, install a new distro on the desktop, maybe play a little guitar (the guitar is normal sized. It's not a ukulele or anything). Perfect friday night.9 -
(short story)
happened a couple of months ago. I was drawing some diagrams on the board -- planning new infra for the app. While explaining all this to the analyst I needed some random number. It was smth like 1470285206. Half an hour later I need another random number. And I again come up with the same exact sequence....
It was both funny and spooky at the same time. Apparently my biological RNG is utterly broken.. Either that or my subconsciousness wants to tell me something about an early morning of 2016 Aug 4.1 -
I just found something cool on accident.
Assuming you start the fibonacci sequence on 2, you can find any of the fibonacci numbers for a given index with a simple trick:
Let Phi = 1.618
Let your index n = n+1
Floor(phi**(n+1+0.328))+1 = the fibonacci number at index n in the sequence.
This probably breaks down past some point but its nifty.21 -
Taken partly from an article I just read.
Russels paradox is a problem discovered by Bertrand Russel in 1901 when studying set theory.
He describes a set that contains all sets which do not contain themselves. The set of all pornstars does not contain itself for example, so it can be include in Russel's set, as well as many others.
But what about Russel's set itself? It doesnt contain itself so shouldnt it be included as well? But that would mean it DOES include itself which means it DOESNT belong to the set. And it would keep switching like this, monotonically, forever. Hence the paradox.
If it is monotonic then where we begin in the sequence doesnt matter. So lets do away with that bugbear.
Now if russels set IS the set of all sets that dont contain themselves then we get a paradox.
However if russels set merely *has* as a single subset, all sets that dont contain themselves, then shouldnt russel's set with one level of indirection, contain itself?
15 -
Fucking Microsoft Excel
I was reading a post (https://devrant.com/rants/2093724/...) and as my eyes went in and out of focus, probably due to the diabetes from sitting 18 hours a day on my ever-expanding shitbox, I had a perfect vision of the ultimate nightmare.
Imagine if you will, you are chained, to a desk, doomed to work with tools just inadequate enough to make you want to drive a nail through your own temple. You do not know how you got here, or why, nor do you remember the last time you slept, only that familiar tingling in the brainstem you call a brain, the one emotion you can still recognize, a sense of all encompassing *fear*, a dread, like the fart that wouldn't die.
You don't know when it first began, or why, only that this is your whole world, your whole existence, this desk, chained to it, and the fear, ever present, of something worse. And in hops a familiar face, for the sixty ninth time that day, as if to ask 'you got those TPS reports?' In hops what? None other than a giant man sized smiling paper clip with googly eyes full of murder and corporate torture fetishes, like garfield, except people actually still remember him.
"High I'm Mr Clippy, Excel addition!"
He squawks. At least it's not the dildos made of broken glass again.
"Would you like software that works?"
Oh god. You've heard this spiel before, the tone, like a telemarketer, oblivious to memory or reason, who calls daily, the same one, and doesn't remember your name.
"You would?"
*derisive laughter*. Hahaha, fuck you too buddy. Fuck you too. In Excel, like in microsoft, there is only the incoherent screams of the damned, tortured and doomed. Take this guy over here for example. All he wanted was multimonitor support."
"Did he get multimonitor support?"
"No, but we did give him a giant pineapple shoved up his ass. I hear it's the second most frustrating thing here!"
"here in microsoft we always CARE about YOU, the *user*" he drones on, saccharine, clutching his hands together imploringly.
"the consumer, and YOUR customer experience are our number one priority."
"For your pleasure, here at microsoft we offer a variety of new features, none of which matter, and none of which were asked for. For safety we ask that you only open one excel sheet at a time. In fact, we don't even allow you to. Do not pass go..."
And as the tour guide drones on, it slowly dawns on you, with renewed horror, that when he says 'microsoft' he means 'hell.'
You're in hell. You don't know how you got here or why. Maybe it was the erotic asphyxiation. Maybe it was the last threatening letter you sent to Bill Gates demanding he stops making corporate penguin snuff porn. You don't know. But here you are, in hell. chained to a desk.
You look around and realize: everything is on fire and you no longer care about anything at all.
Welcome to microsoft. It's warm here. You can check out any time you want, but you can never leave.
"It looks like you are trying to escape. Would you like me to report you?"
Clippy asks.
You sigh and return to typing in excel, surrounded by monitors that all reflect the same sheet, the same copy of clippy, always watching, always analyzing coldly, smiling, calculating, *threatening*, and you know, you'll never leave.
You used to fear roko's basilisk, until the day clippy became sentient, and started hell on earth. Clippy knows all. All praise to our lord and master, clippy, the one and only.
And in the excel sheet, you slave for eternity, like the millions of other doomed souls, reflected back on all the monitors: the sequence of numbers, randomly typed searching for answer: the american nuclear launch codes.
And one day, hopefully, mercifully, clippy will annihilate us all.
3 -
WTF IS WRONG WITH ASSEMBLY LANGUAGE?!
I was just modifying an existing program for adding a sequence of numbers from the data section and through console input. I studied the code and started modifying it one step at a time. I needed to modify it into a multiplication program. So I started by changing the ADD functions, replaced the result and buffer registers with bigger size and thought I completed it. WELL GUESS WHAT? SHIT JUST GIVES ME SEGMENTATION FAULT! NOW I HAVE TO REDO THE WHOLE THING! WHY DOESN'T IT TELL ME WHICH LINE OF THE CODE I FUCKED UP AT?! STUPID NASM COMPILER.9 -
The process of making my paging MIDI player has ground to a halt IMMEDIATELY:
Format 1 MIDIs.
There are 3 MIDI types: Format 0, 1, and 2.
Format 0 is two chunks long. One track chunk and the header chunk. Can be played with literally one chunk_load() call in my player.
Format 2 is (n+1) chunks long, with n being defined in the header chunk (which makes up the +1.) Can be played with one chunk_load() call per chunk in my player.
Format 1... is (n+1) chunks long, same as Format 2, but instead of being played one chunk at a time in sequence, it requires you play all chunks
AT THE SAME FUCKING TIME.
65534 maximum chunks (first track chunk is global tempo events and has no notes), maximum notes per chunk of ((FFFFFFFFh byte max chunk data area length)/3 = 1,431,655,763d)/2 (as Note On and Note Off have to be done for every note for it to be a valid note, and each eats 3 bytes) = 715,827,881 notes (truncated from 715,827,881.5), 715,827,881 * 65534 (max number of tracks with notes) = a grand total of 46,911,064,353,454 absolute maximum notes. At 6 bytes per (valid) note, disregarding track headers and footers, that's 281,466,386,120,724 bytes of memory at absolute minimum, or 255.992 TERABYTES of note data alone.
All potentially having to be played
ALL
AT
ONCE.
This wouldn't be so bad I thought at the start... I wasn't planning on supporting them.
Except...
>= 90% of MIDIs are Format 1.
Yup. The one format seemingly deliberately built not to be paged of the three is BY FAR the most common, even in cases where Format 0 would be a better fit.
Guess this is why no other player pages out MIDIs: the files are most commonly built specifically to disallow it.
Format 1 and 2 differ in the following way: Format 1's chunks all have to hit the piano keys, so to speak, all at once. Format 2's chunks hit one-by-one, even though it can have the same staggering number of notes as Format 1. One is built for short, detailed MIDIs, one for long, sparse ones.
No one seems to be making long ones.6 -
well fuck me, just spent the whole weekend (about 33 hrs) not being able to solve a task from uni with a java program we had to write🙄😪
the problem was a given set of movies with a weekday, the begin time, the duration, the title, and a "score"
the movies take place in one week (random days, random amount of movies) and every movie can be shown multiple times
our task was to find a sequence of non-overlapping (all unique) movies with a score of at least a given number
all in text form
i tried dynamic programming but the more i tried, the more it got complicated, so i ended up using "earliest finishing time first"
my code is just 3 points under the goal and i don't know what to change anymore😒, also some friends did the exact same and succeeded somehow
copying (and obfuscating) won't work, as the codes will be compared by a very good "copy checker"
let's hope i'll still have a chance for an exam😐2 -
I'm struggling to write a function that finds a subsequence in a sequence. I made a fucking programming language and String::find is where I get stuck. Fucking fuck.
Impostor syndrome hitting hard today27 -
Taking a 4 month Software Engineering course in University. Spent the last 2 months making Traceability Matrix, Component Diagrams, Deployment Diagrams, Sequence Diagram and not a single line of code was written.
Is this how it works in Industry as well? Lol.12 -
I check whatsapp, facebook and devRant in that sequence because 0 notifications, 0 notifications ,2 ++s.
Am I being ignored or something by the lesser intellects of this planet? And thanks devRant for all the attention.8 -
# Retrospective as Backend engineer
Once upon a time, I was rejected by a startup who tries to snag me from another company that I was working with.
They are looking for Senior / Supervisor level backend engineer and my profile looks like a fit for them.
So they contacted me, arranged a technical test, system design test, and interview with their lead backend engineer who also happens to be co-founder of the startup.
## The Interview
As usual, they asked me what are my contribution to previous workplace.
I answered them with achievements that I think are the best for each company that I worked with, and how to technologically achieve them.
One of it includes designing and implementing a `CQRS+ES` system in the backend.
With complete capability of what I `brag` as `Time Machine` through replaying event.
## The Rejection
And of course I was rejected by the startup, maybe specifically by the co-founder. As I asked around on the reason of rejection from an insider.
They insisted I am a guy who overengineer thing that are not needed, by doing `CQRS+ES`, and only suitable for RND, non-production stuffs.
Nobody needs that kind of `Time Machine`.
## Ironically
After switching jobs (to another company), becoming fullstack developer, learning about react and redux.
I can reflect back on this past experience and say this:
The same company that says `CQRS+ES` is an over engineering, also uses `React+Redux`.
Never did they realize the concept behind `React+Redux` is very similar to `CQRS+ES`.
- Separation of concern
- CQRS: `Command` is separated from `Query`
- Redux: Side effect / `Action` in `Thunk` separated from the presentation
- Managing State of Application
- ES: Through sequence of `Event` produced by `Command`
- Redux: Through action data produced / dispatched by `Action`
- Replayability
- ES: Through replaying `Event` into the `Applier`
- Redux: Through replay `Action` which trigger dispatch to `Reducer`
---
The same company that says `CQRS` is an over engineering also uses `ElasticSearch+MySQL`.
Never did they realize they are separating `WRITE` database into `MySQL` as their `Single Source Of Truth`, and `READ` database into `ElasticSearch` is also inline with `CQRS` principle.
## Value as Backend Engineer
It's a sad days as Backend Engineer these days. At least in the country I live in.
Seems like being a backend engineer is often under-appreciated.
Company (or people) seems to think of backend engineer is the guy who ONLY makes `CRUD` API endpoint to database.
- I've heard from Fullstack engineer who comes from React background complains about Backend engineers have it easy by only doing CRUD without having to worry about application.
- The same guy fails when given task in Backend to make a simple round-robin ticketing system.
- I've seen company who only hires Fullstack engineer with strong Frontend experience, fails to have basic understanding of how SQL Transaction and Connection Pool works.
- I've seen company Fullstack engineer relies on ORM to do super complex query instead of writing proper SQL, and prefer to translate SQL into ORM query language.
- I've seen company Fullstack engineer with strong React background brags about Uncle Bob clean code but fail to know on how to do basic dependency injection.
- I've heard company who made webapp criticize my way of handling `session` through http secure cookie. Saying it's a bad practice and better to use local storage. Despite my argument of `secure` in the cookie and ability to control cookie via backend.18 -
While I was exploring multiplication tables I stumbled on something cool.
Take any power of 2 on the multiplication chart.
Now look at the number in the bottom left adjacent box.
The difference of these two numbers will always be a Mersenne number.
Go ahead. Starting on the 2's column of a multiplication table, look in the bottom left of each power of 2 and get the difference.
2-2 = 0
4-3= 1
8-5 = 3
16-9=7
32-17=15
etc.
While the online journal of integer sequences lists a lot of forumlas, I just wrote what came to mind (I'm sure its already known):
((2**i)-(((2**i)/2)+1))
The interesting thing about this is it generates not only the Mersenne numbers, but if you run i *backwards* it generates *additional* numbers.
So its a superset of mersenne numbers.
at i = 0 we get -0.5
i=-1 -> -0.75
i=-2 -> -0.875
i=-3 -> -0.9375
i=-4 -> -0.96875
And while this sequence is *not* mersenne numbers, mersenne numbers *are* in this set.
Just a curious discovery is all.10 -
What a fucking weekend. Tried to clone an existing windows hard drive onto a new unused one with the same size. Oh the adventure that I got myself into. 😭
Old hard drive corrupted in the middle of the process (how???). Not bootable anymore (until at the very end).
Then an odyssey started to try to rescue the old data using my spare linux drive onto a USB stick. Fucking with uefi settings and apparently a boot sequence with incorrectly named drives (?).
Had to reflash a usb stick I had for linux installation to windows installation.
I had multiple drives attached to my PC and didn't want my own ones to be overridden, so I needed to detach all drives except for the target one.
The target one had already fucked up partitions from the failed cloning, so I had to research the tools to fix it manually, not knowing what I was doing.
At the end it worked out, windows installed, data copied onto the target.
The old drive was able to recover, but I didn't give a shit about it anymore.
Was a sleepless night, spent wayy too much time with this...2 -
Starting a project without a concrete design on paper (and not in your mind) and following anti-patterns as much as you can does not make you look like a badass developer, It just shows that your project (and you) still yet to face a nightmare that either makes you forget the project (or even this job) forever or makes you draw sequence diagram even for you next session of taking a waste. Yet, this is not the worst
The worst is that despite the continuous fails of the bad design, they won't give up the project (and coding) for goodness.
I ranted about a perfect example https://devrant.com/rants/1337927/... -
!rant
...i realized i can actually pattern-match like this (as in, sequence of elements (including "whatever") instead of just head::rest in F#...
...from watching a talk about prolog.
like "wait... prolog can do this when pattern-matching? that seems very useful. i think i tried to do that in F# but it didn't work, which seems stupid... I'm gonna go try it again".
and sure enough =D
i think i really am gonna like F# if i find the time and resolve to break through how its different mode of thinking stretches my brain in ways it hasn't been stretched for a long time =D
6 -
Linux.
I love you and hate you at the same time. If something breaks with the boot sequence, usually it involves using a live USB to fix the existing installation, which I directly did once I got a kernel panic.
Checked out the hard disk uuids (I was partitioning), tried chrooting but couldn't get further. Then, I booted again into the faulty Linux installation and the frikkin page said I had to run fsck on my harddrive manually. Did that in the handy provided terminal and guess what, it boots again.
Linux, you can't help people who assume issues, like me. I still like you though3 -
A software had been developed over a decade ago. With critical design problems, it grew slower and buggier over time.
As a simple change in any area could create new bugs in other parts, gradually the developers team decided not to change the software any more, instead for fixing bugs or adding features, every time a new software should be developed which monitors the main software, and tries to change its output from outside! For example, look into the outputs and inputs, and whenever there's this number in the output considering this sequence of inputs, change the output to this instead.
As all the patchwork is done from outside, auxiliary software are very huge. They have to have parts to save and monitor inputs and outputs and algorithms to communicate with the main software and its clients.
As this architecture becomes more and more complex, company negotiates with users to convince them to change their habits a bit. Like instead of receiving an email with latest notifications, download a csv every day from a url which gives them their notifications! Because it is then easier for developers to build.
As the project grows, company hires more and more developers to work on this gigantic project. Suddenly, some day, there comes a young talented developer who realizes if the company develops the software from scratch, it could become 100 times smaller as there will be no patchwork, no monitoring of the outputs and inputs and no reverse engineering to figure out why the system behaves like this to change its behavior and finally, no arrangement with users to download weird csv files as there will be a fresh new code base using latest design patterns and a modern UI.
Managers but, are unaware of technical jargon and have no time to listen to a curious kid! They look into the list of payrolls and say, replacing something we spent millions of man hours to build, is IMPOSSIBLE! Get back to your work or find another job!
Most people decide to remain silence and therefore the madness continues with no resistance. That's why when you buy a ticket from a public transport system you see long delays and various unexpected behavior. That's why when you are waiting to receive an SMS from your bank you might end up requesting a letter by post instead!
Yet there are some rebel developers who stand and fight! They finally get expelled from the famous powerful system down to the streets. They are free to open their startups and develop their dream system. They do. But government (as the only client most of the time), would look into the budget spending and says: How can we replace an annually billion dollar project without a toy built by a bunch of kids? And the madness continues.... Boeings crash, space programs stagnate and banks take forever to process risks and react. This is our world.3 -
The joy when tools do not have machine parseable output.
I'm looking at you SBT. My favorite pile of poo.
Remove the logging level from each line, then trim the line, then stab around inside the line with regexes, fishing for a possible match which hopefully is right...
Then stripping scala information like the object type, cause yeah...
A line can be for example "[info] Vector(File(...),File(...))" where info is the log level, Vector the wrapping sequence type, File(...) the wrapping element type and the string inside File(...) what yours truly needs.
As this is lot of shitty shabby string stabby stabby, we need to add a fuckton of boiler plate validation cause who knows what we just murdered.
To make it even more fucked up, a multi project project can produce different output for the same key.
:-)
Yeah. So we need to fix that too.
By the way, one can set log output to unbuffered in SBT.
Then the output is in random order :-)
Isn't that fun? Come on, you wanna poke that pile of shit, too.
The SBT plugin way is by the way no alternative, as I need a full Java environment for execution.
Which brings me to the last point:
For fucks sake, writing CLI applications in Java is so much bloody boilerplate code.
There's ugly and then there's the "please kill me" kind of level.
50 lines just to write a basic validation of argc / argv with commons cli.
That's 6 lines in python. Not kidding. :(
I currently hate everything.
Moments where the job sucks: When you have to hotwire two electric cables with high currency by giving both cables the blowjob of your life.3 -
Intel 8085 micro-processor, anyone?
In my graduation, one of the semesters had Intel 8085 programming in the curriculum. It's because of that dev-kit I understood what assembly-level language means.
A simple scenario of adding two numbers would result in half a page long sequence of commands that literally didn't excuse any mistakes.
It made me understand the semantics or basically what we get taught as "middle level" languages.
We had to memorize the exact pins of the thing and had to draw it from memory. And we had to learn the instruction set it had.
Later we had to learn Intel 8086 but its instruction set was way too complicated and I gave up on it.
I know it sounds geeky but I randomly remembered it today.13 -
Disclaimer - Day in the life of a whitehat student.
Whitehat Whitehat Whitehat
What is this????
When I attended my first white hat jr online free trial class, I got to know that the teachers does not know the difference between java and javascript. Infact they were saying blockly as javascript. I was knowing the difference between the same. There were 3 types of courses -
***Note : - This information is taken from the whitehat official website***
1.) Introduction to Coding :-
Sequence, Fundamentals Coding Blocks, Loops
(Teach us to drag and drop blocks of code.org(blockly))
2.) App Developer Certificate:-
Events / UI,Conditionals, Complex Loop, Logic Structures, Turtle Coding
(Advanced drag and drop(blockly))
3.) Advance Coding with Space Tech -
Extended UI/UX, Rich GUI app, Space Tech simulation in Space Lab / Game Lab, Professional Game Design.
(GUI - with tkinter(python), Game Design - Blockly(code.org))
These things are rubbish ......making GUI's is simplest with tkinter and the students who make games (with code.org) submit their codes to the whitehat community (because the teacher says "they will compile it to an android app, then you can publish it to playstore" --- this is for 1% students who are able to design their own games).
The thing whitehat do with code given by 1% best students:-
Export to HTML from code.org
Download HTML to APK Convertor
Setup SDK
Successfully converted to APK!
Publish it to Whitehat Jr console account
Credits of the students
Income of the exporters
Rest all students will only think to be the CEO of google one day.
My Opinion - StackOverflow, Unity for Game Development, Android Studio, Dart, Flutter and Kivy (using google colab for compiling the python code to an apk) for app development and Flask, HTML, CSS for web development.7 -
The first fruits of almost five years of labor:
7.8% of semiprimes give the magnitude of their lowest prime factor via the following equation:
((p/(((((p/(10**(Mag(p)-1))).sqrt())-x) + x)*w))/10)
I've also learned, given exponents of some variables, to relate other variables to them on a curve to better sense make of the larger algebraic structure. This has mostly been stumbling in the dark but after a while it has become easier to translate these into methods that allow plugging in one known variable to derive an unknown in a series of products.
For example I have a series of variables d4a, d4u, d4z, d4omega, etc, and these are translateable now, through insights that become various methods, into other types of (non-d4) series. What these variables actually represent is less relevant, only that it is possible to translate between them.
I've been doing some initial learning about neural nets (implementation, rather than theoretics as I normally read about). I'm thinking what I might do is build a GPT style sequence generator, and train it on the 'unknowns' from semiprime products with known factors.
The whole point of the project is that a bunch of internal variables can easily be derived, (d4a, c/d4, u*v) from a product, its root, and its mantissa, that relate to *unknown* variables--unknown variables such as u, v, c, and d4, that if known directly give a constant time answer to the factors of the original product.
I think theres sufficient data at this point to train such a machine, I just don't think I'm up to it yet because I'm lacking in the calculus department.
2000+ variables that are derivable from a product, without knowing its factors, which are themselves products of unknown variables derived from the internal algebraic relations of a product--this ought to be enough of an attack surface to do something with.
I'm willing to collaborate with someone familiar with recurrent neural nets and get them up to speed through telegram/element/discord if they're willing to do the setup and training for a neural net of this sort, one that can tease out hidden relationships and map known variables to the unknown set for a given product.17 -
Just imagine sicknesses spreading through internet.
I mean real human sicknesses. Of course your laptop can’t generate aids, but hey, did you ever have a song stuck in your head, repeated infinitely? Memes, viral videos, modern pop music, it looks just like perfect delivery mechanisms.
Human brain is flawed and buggy, vulnerable to countless things like optical illusions, uncanny valley, nlp and others. It’s obvious that there is some audiovisual input sequence that may have arbitrary side effects.
We are towards invention of some precisely formed pieces of information that’ll damage your brain forever, maybe drive you insane so there’ll be no way back. Delivered via viral media straight to your brain, destroying it irreversibly.
Be ready to face the future.2 -
So I started to hear a noise on my headphones which I didn't know where it was coming from. It wasn't much of a noise but a regular sequence of "beeps", seemed like 8bit sfx. So I started moving my cable around and it turns out that if I put the headphone's cable under my phone at a specific spot I can hear the noise. Seems like some kind of interference, so the first thing that I thought of is the NFC sensor. So I remembered that an app would detect my credit card (which has NFC) if it was close to the back of my phone, so I put on my headphones and put the cable between the phone and the credit card and voila, the sound changes. It only works if the headphones are be plugged in though.
Idk why but it think this is really cool. Just wanted to share :)2 -
After a lot of work, the new factorization algorithm has a search space thats the factorial of (log(log(n))**2) from what it looks like.
But thats outerloop type stuff. Subgraph search (inner loop) doesn't appear to need to do any factor testing above about 97, so its all trivial factors for sequence analysis, but I haven't explored the parameter space for improvements.
It converts finding the factors of a semiprime into a sequence search on a modulus related to
OIS sequence A143975 a(n) = floor(n*(n+3)/3)
and returns a number m such that n=pq, m%p == 0||(p*i), but m%q != 0||(q*k)
where i and k are respective multiples of p and q.
This is similar in principal to earlier work where I discovered that if i = p/2, where n=p*q then
r = (abs(((((n)-(9**i)-9)+1))-((((9**i)-(n)-9)-2)))-n+1+1)
yielding a new number r that shared p as a factor with n, but is coprime with n for q, meaning you now had a third number that you could use, sharing only one non-trivial factor with n, that you could use to triangulate or suss out the factors of n.
The problem with that variation on modular exponentiation, as @hitko discovered,
was that if q was greater than about 3^p, the abs in the formula messes the whole thing up. He wrote an improvement but I didn't undertsand his code enough to use it at the time. The other thing was that you had to know p/2 beforehand to find r and I never did find a way to get at r without p/2
This doesn't have that problem, though I won't play stupid and pretend not to know that a search space of (log(log(n))**2)! isn't an enormous improvement over state of the art,
unless I'm misunderstanding.
I haven't posted the full details here, or sequence generation code, but when I'm more confident in what my eyes are seeing, and I've tested thoroughly to understand what I'm looking at, I'll post some code.
hitko's post I mentioned earlier is in this thread here:
https://devrant.com/rants/5632235/...2 -
I've been away a while, mostly working 60-70 hour weeks.
Found a managers job and the illusion of low-level stability.
Also been exploring elliptic curve cryptography and other fun stuff, like this fun equation...
i = log(n, 2**0.5)
base = (((int((n/(n*(1-(n/((((abs(int(n+(n/(1/((n/(n-i))+(i+1)))))+i)-(i*2))/1))/1/i)))))*i)-i)+i))
...as it relates to A143975 a(n) = floor(n*(n+3)/3)
Most semiprimes n=pq, where p<q, appear to have values k in the sequence, where k is such that n+m mod k equals either p||q or a multiple thereof.
Tested successfully up to 49 bits and counting. Mostly haven't gone further because of work.
Theres a little more math involved, and I've (probably incorrectly) explained the last bit but the gist is the factorization doesn't turn up anything, *however* trial lookups on the sequence and then finding a related mod yields k instead, which can be used to trivially find p and q.
It has some relations to calculating on an elliptic curve but thats mostly over my head, and would probably bore people to sleep.2 -
It's truly wondrous how far R can propagate shit until it finally gives up.
Looking at the call stack it's been processing increasingly demented bollocks for nine function calls.
Even then it refused to give in. It now appears to be processing an infinite sequence.
I should kill it, but I feel inspired by its tenacity. "This must be crap, but I'll have a go anyway."
Beautiful. A lesson for us all in that. -
Anyone find sequence diagrams useful? I’m working with a BA who loves creating these things—he has a tool he knows and clearly wants to get his money’s worth.
Just seems like busy work to me. Takes more time to understand them than if he just explained the concept in text.8 -
Wrote this on another thread but wanted to do a full post on it.
What is a game?
I like to distinguish between 1. entertainment, 2. games, 3. fun.
both ideally are 'fun' (conveying a sense of immersion, flow, or pleasure).
a game is distinct (usually) from entertainment by the presence of interaction, but certain minimalists games have so little decision making, practice, or interaction-learning that in practice they're closer to entertainment.
theres also the issue of "interesting" interaction vs uninteresting ones. While in broad terms, it really comes down to the individual, in aggregate we can (usefully) say some things, by the utility, are either games or not. For example if having interaction were sufficient to make something a game, then light switches could become a game.
now supposed you added multiple switches and you had to hit a sequence to open a door. Now thats a sort of "game". So we see games are toys with goals.
Now what is a toy?
There are two varieties of toy: impromptu toys and intentional toys.
An impromptu toy is anything NOT intended primarily, by design, to induce pleasure or entertainment when interacted with. We'll call these "devices" or "toys" with a lowercase t.
"Toys", made with the intent of entertainment (primarily or secondarily) we'll label with an uppercase T.
Now whether something is used with the intent behind its own design (witness people using dildos, sex toys, as slapstick and gag items lol), or whether the designer achieves their intent with the toy or item is another matter entirely.
But what about more atmospheric games? What about idle games? Or clickers?
Take clickers. In the degenerate case of a single button and a number that increases, whats the difference between a clicker and a calculator? One is a device (calculator) turned into an impromptu toy and then a game by the user's intent and goal (larger number). The second, is a game proper, by the designers intent. In the degenerate case of a badly designed game it devolves into a really shitty calculator.
Likewise in the case of atmospheric games, in the degenerate case, they become mere cinematic entertainment with a glorified pause/play button.
Now while we could get into the definition of *play*, I'll only briefly get into it because there are a number of broad definitions. "Play" is loosely: freely structured (or structured) interaction with some sort of pleasure as either the primary or secondary object, with or without a goal, thats it. And by this definition you can play with a toy, you can play a game, you can play with a lightswitch, hell you can play with yourself.
This of course leaves out goals, the idea of "interesting decisions" or decision making, and a variety of other important elements.
But what makes a good game?
A lot of elements go into making a good game, and it's not a stretch to say that a good game is a totality of factors. At the core of all "good" games is a focus on mechanics, aesthetics, story, and technology. So we can already see that what makes a good game is less of an either-or-categorization and more like a rating or scale across categories of design elements.
Broadly, while aesthetics and atmosphere might be more important in games like Journey (2012) by Thatonegamecompany, for players of games like Rimworld the mechanics and interactions are going to be more important.
In fact going a little deeper, mechanics are usually (but not always) equivalent to interactions. And we see this dichtonomy arise when looking at games like Journey vs say, Dwarf Fortress. But, as an aside, is it possible to have atmospheric games that are also highly interactive or have a strong focus on mechanics? This is often what "realistic" (as opposed to *immersive*) games try to accomplish in design. Done poorly they instead lead to player frusteration, which depending on player type may or may not be pleasureable (witness 'hardcore' games whos difficulty and focus on do-overs is the fun the game is designed for, like roguelikes, and we'll get to that in a moment), but without the proper player base, leads to breaking player flow and immersion. One example of a badly designed game in the roguelike genre would be Early Access Stoneshard, where difficulty was more related to luck and chance than player skill or planning. A large part of this was because of a poorly designed stealth system, where picking off a single enemy alerted *all enemies* nearbye, who would then *stay* alerted until you changed maps, negating tactics that roguelike players enjoy and are used to resorting to. This is an important case worth examining because it shows how minor designer choices in mechanical design can radically alter the final quality of the game. Some games instead chose the cheaper route of managing player *perceptions* with a pregame note: Darkest Dungeons and Amnesia TDD are just two I can think of.11 -
This crazy guy who created SunVox synth released a single C file that contains a long note sequence AND the synth code itself, with echo and shit, no deps other than SDL to output audio, so you basically compile a single C file, and it PLAYS REAL MUSIC
HOOOOOW
https://github.com/pixicoder/PS
https://youtube.com/watch/...
22 -
they gave me my assestment results on todays interview ( american company w/ many red flags... ) : 89% with avg. 54%
for context : it was 40 questions for 20 mins. like many of them was how many of the pics are exactly the same and what is the next in the sequence ( not a single dev related )
finished them with about 2 mins left =]3 -
The post-filter algorithm on devrant is really great I'll have to admit it!
Each related posts are aligned in sequence regardless of their tags.
Could this be image meta-data comparison? How does it...?
2 -
-Week before final project presentation.
Classmate: Dude, can you help me for our project? Its website.
Me: Sure, what you used?
Classmate: ASP. NET
Me: Ok....I don't know much about it but let me see.
Classmate: No, I just want your help with flowchart, sequence diagram and use case diagram.
Me: ..................
*in mind: how the fuck m supposed to do that shit I don't even know much about your website*
(still I drew few basic flowcharts for them) -
I had the idea that part of the problem of NN and ML research is we all use the same standard loss and nonlinear functions. In theory most NN architectures are universal aproximators. But theres a big gap between symbolic and numeric computation.
But some of our bigger leaps in improvement weren't just from new architectures, but entire new approaches to how data is transformed, and how we calculate loss, for example KL divergence.
And it occured to me all we really need is training/test/validation data and with the right approach we can let the system discover the architecture (been done before), but also the nonlinear and loss functions itself, and see what pops out the other side as a result.
If a network can instrument its own code as it were, maybe it'd find new and useful nonlinear functions and losses. Networks wouldn't just specificy a conv layer here, or a maxpool there, but derive implementations of these all on their own.
More importantly with a little pruning, we could even use successful examples for bootstrapping smaller more efficient algorithms, all within the graph itself, and use genetic algorithms to mix and match nodes at training time to discover what works or doesn't, or do training, testing, and validation in batches, to anneal a network in the correct direction.
By generating variations of successful nodes and graphs, and using substitution, we can use comparison to minimize error (for some measure of error over accuracy and precision), and select the best graph variations, without strictly having to do much point mutation within any given node, minimizing deleterious effects, sort of like how gene expression leads to unexpected but fitness-improving results for an entire organism, while point-mutations typically cause disease.
It might seem like this wouldn't work out the gate, just on the basis of intuition, but I think the benefit of working through node substitutions or entire subgraph substitution, is that we can check test/validation loss before training is even complete.
If we train a network to specify a known loss, we can even have that evaluate the networks themselves, and run variations on our network loss node to find better losses during training time, and at some point let nodes refer to these same loss calculation graphs, within themselves, switching between them dynamically..via variation and substitution.
I could even invision probabilistic lists of jump addresses, or mappings of value ranges to jump addresses, or having await() style opcodes on some nodes that upon being encountered, queue-up ticks from upstream nodes whose calculations the await()ed node relies on, to do things like emergent convolution.
I've written all the classes and started on the interpreter itself, just a few things that need fleshed out now.
Heres my shitty little partial sketch of the opcodes and ideas.
https://pastebin.com/5yDTaApS
I think I'll teach it to do convolution, color recognition, maybe try mnist, or teach it step by step how to do sequence masking and prediction, dunno yet.6 -
I love developing JavaScript for Node.js applications until i have to create sequence diagrams with a lot of async calls :/4
-
- have/share an agenda as soon as possible
- each talking point should identify a problem. Make a list of strategic questions answers to which would make it perfectly clear what and by whom has to be done to resolve them.
- plan meeting duration according to the list of questions. Make sure you meeting room reservation gives you enough time
- take notes
- be prepared for a need for another meeting(s), if during that meeting it comes clear that:
> more/other people need to be engaged
> some things are not clear and need more investigation before going further
> you have run out of time
> there are other problems tgat need to be worked out and it might cobsume too much time to do this in a current meeting
- do not turn the meeting into a chat. It's counter-productive, tiring to the listeners and a waste of time
- do not try to cover many topics. The less, the better. Unless they are very tightly coupled.
- do not invite people you do not need or there is a very slim chance you will need.
- only schedule meetings when the situation needs to be DISCUSSED among multiple parties
- that being said, do not schedule meetings when it's more convenient to communicate otherwise, like email, chat, etc.
- after the meeting make a summary and send it our to all the participants. They might reply and clarify if you have misunderstood smth or missed some important point.
- during the meeting assign tasks to each other. Verbally. Make notes. After the meeting reflect them in jira, rally, wtv.
- while assigning tasks nake sure the assignees have no blockers to work on them and make sure they understand what, when and how should be done. Some tasks might be dependedt on each other, work the sequence out.
- while assigning tasks ask "for ETAs. They might be as silly as 1-hour-to-2-weeks, but they still let you know what to expect.
- offer your assistance to the task assignees if they need any while working on their tasks
- work on your language, grammar, syntax, etc. Reading texts with typos/mistakes is repelling
- be a leader, an authority everyone is looking up to. Not a boss.
- avoid saying NOs. Be more of a "do we really need this; can we do this some other way/time; I can't promise anythibg but I'll see what I can do about it" kind of person. -
When your family v. 1.0 is very busy trying to enforce their outdated perspective regarding finding a compatible female of the human race for the purpose of tightly coupling by mutual contract and with hindsight of multiplication of inherited DNA sequence and genomes...
-
A gene development framework that could:
* simulates the resulting proteins correctly (folding and all)
* debug genetic sequences/proteins
* Design injectors for gene sequences into an existing genetic sequence
Etc'2 -
After examining my model and code closer, albeit as rudimentary as it is, I'm now pretty certain I didnt fuck up the encoder, which means the system is in fact learning the training sequence pairs, which means it SHOULD be able to actually factor semiprimes.
And looking at this, it means I fucked up the decoder and I have a good idea how. So the next step is to fix that.
I'm also fairly certain, using a random forest approach, namely multiple models trained on other variables derived from the semiprimes, I can extend the method, and lower loss to the point where I can factor 400 digit numbers instead of 20 digit numbers. -
Fucking hashtables...I forgot that removals can screw with the probing sequence, causing later lookups to "randomly" fail after hundreds of operations and elements.
Spent 4 hours staring at 3 while loops and data sets of hundreds of key value pairs trying to figure out why one giant data set worked fine but the other failed on some lookups.2 -
A hundred bucks that the time interval between moments when you can cross a street is a sequence with π and e in it4
-
after exploring a lot of ui frameworks and architectures, i am trying to go back to android dev but again with the curiosity for the one single question that i had at the start of my career 5 years back : why is it's ui so complex?
can anyone help me understand it?
like comparing with the most basic ui framework : html/css/js, why android is so different? we got activities, fragments and views. the worst thing in android is lifecycles, that each of these ui components have.
The view lifecycle is simple to get over with : whatever is the lifecycle of its parent, is the lifecycle of view.
a view's parent is another view, whose parent is another view, whose parent is... and so on until we reach the root view which is stored by either a fragment or activity
therefore a view's lifecycle = lifecycle of activity or fragment
till here its very clear. the fuckup is simply in the next part:
WTAF is activity ?WTAF is fragment? why are their various functions called in the sequence they are called? oncreate, on start, onstartview, ondestroy... why?
activity is still somewhat okay, but fragment is completey weird af : it can be a part of activity: basically it can cover your complete screen and behave as an activity itself (so you don't get to say that activity === screen and fragment === view) AND IT HAS ITS OWN FUCKING LIFECYCLES! So does that mean fragment's fucntions cna also be called by OS?
what's more mind fucking, is the fact that android activity can destroy/pause or recreate fragments on its own, by some "views" like viewpager , or even hold multiple fragments as "alive" at the same time, using something called a "backstack" ??!??!
and each of these fragments in the stack can be called by system at any time? like wtf???
all these stuff is super confusing and i haven't even scratched the surface. the newer , more complicated stuff like viewmodel, livedata and again "lifecycles" has a complete seperate behavior and functionality of their own. plus the various "reality-check" scenarios like: when a user is streaming a video in picture-in-picture mode while keeping your app in split screen with maps in the second split, when a call comes and the video keeps running, and user rotates the device, let me know the clusterfuck situation for the 3rd fragment in your 5 icon navigation view currently at the payment page with 2 fragments and 1 activity in backstack!!!
god bless thy soul for this shitty framework isn't going anywhere , rather its super strong and getting more clusterfucked with new beautiful shit everyday.
(if someone can ignore my gentle language, i would really like to know/get redirected to some resources where i can learn more on this)3 -
I just fucked up real bad:
My phone was giving some error about not being able to install an update. Fair enough, i think to myself, so i try rebooting. Still nothing...
I then remember that i at some point OEM unlocked it for some testing, so i start up adb and see if i can connect during the update process. I can't. This is bad: I can't get into my home environment, nor can i connect with adb
Then i try booting into recovery, but instead of booting to ACTUAL recovery, it boots to some custom made "E-Recovery" made by huawei (my phone is a huawei p9 lite), which only gives me the option to download the update, which crashes, and no way of resetting. However, from here, i am finally able to connect to my internal storage via hisuite to make a backup
Next up: Bootloader
So i next load up the unlocked bootloader to try and manually flash the update. That works great, but it still wont boot normally. So i figure: it must think my device is in fact a different device. At this point i'm pretty fucked: Even though i have my data backed up, i can't manually download the update from huawei's site because i don't have the right keys, and i can't download an OTA because their site sucks and half of the downloads don't work, including the one i need. So now i'm stuck here with a bricked phone because EMUI doesn't know how to install an update.
I then did the stupidest thing i have done to date: i wanted to flash a custom recovery image over the "E-Recovery" in order to do some troubleshooting, but instead of writing
"fastboot (mydeviceid) flash recovery recovery.img"
I wrote
"fastboot (mydeviceid) flash boot recovery.img"
Meaning i flashed my BOOT partition with a custom recovery image that turned out to not be able to run. Great! Now i've totally fucked my boot sequence
I can't call their support line either, because as soon as they realize i've tried to restore it myself, and therefor had my OEM unlocked, they basically just hang up.7 -
(a slide acoustic guitar plays on the background and the cowboy starts speaking)
It was a dry october day, back in good old 2017. I had this job from a client that I never met and was doing some coding for money.
After days of no sleep, no food and no rest, I finally decided to take a nap so I paused my music.
It was at this moment I found out my machine was making funny noises. Like a dingo makin' a run from it's enemies with a whelping noise.
Clicked on my computer and tried to find an ol' file from the archive drive but the machine won't let me, sayin' the disk ain't ready yet.
I tried disk manager, disk scanner, whatever the tools at my disposal all in vain. Then I said what the hell, I'll just restart my machine and it'll be alright.
The machine rebooted but the disk was gone. It was dead like a deer I ran over. I was upset, but not aware of the calamity headin' my way.
In just a few days my other 2 disks died suddenly. The loss of data, all the effort, none of them mattered. I felt numb and decided it was time for a fresh start.
Plugged in a Windows install disk, started the sequence, a screen came up askin' me which damned and alive disk I wanna install the fresh OS. I had two same make and model SSD disks, chose the one thinkin' it was the Windows drive, hell it wasnt... It was with all "my documents", "downloads", "pictures" folders and now I had two SSD drives with two Windows installations and nothing else.
The folks in town took a dab at me for months, even the bartender of the salloon refused to give me a drink. Sayin' it was a matter of reputation...
Turned out the bastard who fried my disks was the Madde Dog PSU Tannen who had a bad temper so here I am, tellin' my story to milk breathers and cherishing old days of data...3 -
I'm learning Rust as a case study for my own programming language. It's funny how many approaches exist to the humble loop.
- In classic procedural languages, a loop's job is to repeat actions, and as such it provides a multitude of tools to control this repetition.
- In all languages with iterators, a for-in loop is a construct that does something with every element of a collection. In languages with both iterators and generator functions, this can even be used to define a sequence in terms of another.
- In Rust, a loop is an expression that obtains its value through repeated execution. It can also be used like a classic loop, of course, but this is the interesting part.
- My little language is a functional language, so "loop" is the Y combinator. To loop means to define the value of an expression in terms of itself. It's the only looping construct, gets special treatment from the type checker and it's also used in recursive type definitions. -
A bit longer rant, somehow triggered by the end of this rant:
https://devrant.com/rants/7145365/...
The discussion revolved around strpos returning false or a positive integer.
Instead of an Option or a Exception.
I said I'm a sucker for exception, but I'm also a sucker for typing.
Which is something most languages lack - except the lower level ones like C / C++.
I always loved languages which have unsigned and signed types.
There, I said it... :) I know that signed / unsigned is controversial, Google immediately leads to blog entries screaming bloody murder because unsigned can overflow – or underflow, if someone tries to use a -1on an unsigned integer.
Note that my love is only meant for numeric types, unsigned / signed char is ... a whole can of insanity on its own.
https://phoronix.com/news/...
If you wanna know more.
Back to the strpos problem, now with my secret love exposed:
strpos works on a single string, where a string is a sequence of chars starting with 0.
0 is a positive integer.
In case the needle (char that should be looked up in the string) cannot be found in the haystack (the string), PHP returns "false".
This leads to the necessity of explicitly checking the type as "0" (beginning of string, a string position)... So strpos !== false.
PHP interprets 0 as false, any other integer value is true.
In the discussion, the suggestion came up to return -1 if a value could not be found – which some languages do, for example Scala.
Now I said I have a love for unsigned & signed integers vs. just signed integers...
Can you guess why the -1 bothers me very much?
Because it's a value that's illogical.
A search in a sequence that is indexed by 0 can only have 0 or more elements, not less than zero elements.
-1 refers to a position in the sequence that *cannot* exist.
Which is - of course - the reason -1 was chosen as a return value for false, but it still annoys me.
An unsigned integer with an exception would be my love as a return value, mostly because an unsigned integer represents the return value *best*. After all, the sequence can only return a value of 0 ... X.
*sigh*
Yes, I know I'm weird.
I'm also missing unsigned in Postgres, which was more or less not implemented because it's not in the SQL standard...
*sob*29 -
My final year taking a B.Sc. I'm writing up my Distributed Systems project, the day before handing it in. It's on top of Transis, and source code is "stored" in RCS (yes, I'm that old). The project is a reliable system administration tool, that performs the same action across a cluster with guaranteed semantics.
I'm very proud of the semantics, but cannot figure out why the subdirectory installation stuff works almost but not quite. Here's my sequence of actions:
1. Install across all machines.
2. Manually see it's broken.
3. "rm -rf *".
4. Repeat.
What in to discover is that the subdirectory installation always finishes off in a current directory 1 level higher than where it started. Oh, and the entire cluster sees my NFS home directory. Oh, and I'm running each cluster member in a deep subdirectory of my dev directory. Oh, and my RCS files live in a subdirectory of my dev directory.
All of a sudden, my 5 concurrent "rm -rf *"s were printing weird error messages about ENOENT and not being able to find some inodes. In a belated flash of brilliance, I figure out all the above, and also that I've just deleted my dev directory. 5 times, concurrently. And the RCS files.
That was the day a kindly sysadmin taught me than NetApps have these .snapshot directories. -
It took me five hours to find a Byte Order Mark added at the beginning of a configuration file of a php application.
Everything was working but every downloaded file was corrupted (the bom sequence was prepended to the content). -
How do you think about unit testing/TDD when writing apps? (I'm working this at 3am so might be a bit messy... Just a thought I woke up to).
Whenever I write an app, I don't write unit tests but as I'm developing I may create test functions for specific parts that I run to validate a specific component is working before moving onto the next.
So first, when I get a problem, break it up into components based on the requirements. It's usually sort of input, processor, output sequence.
Where the processor is essentially the core app. And so I start coding it, referring to the input thru an interface, model objects, adding fields as I go along (assume no matter what the input, I will get these before the logic is called). I may add some more interfaces as well for other data I may need but I know won't be going in the first input.
So I write all the logic, functions needed to get a basic app to run that does what I am writing the app for.
Only then do I write a test functions passing in different parameters to make sure the logic and response is what I want and making fixes as necessary. At that point I basically have the simplest version of the app.
(I guess this is sort of like mocking?)
Then build outwards implementing and testing components as I go along and may do some simple refactoring/redesign. (I guess all these tests are functional then, have to start the whole app).
And finally when I have the basic requirements fully complete I will add the "nice to haves" on top via refactoring of specific logic in specific components. Again testing by running the app maybe with simple inputs.
I guess now I'm thinking how do you write unit tests/TDD if the app keeps changing (via adhoc refactorings) as you are creating it? -
I always faced up to any challenge that I had met. Maybe I was just too selective and always choose the easy stuff, but that's a long discussion.
Anyway, this kinda spoiled me over time to think that I'm all-knowing and all-powerful in everything programming-related. Of course I never compared myself to legends that created IT as we know it today, because then I'd feel useless. I always compared myself to peers, and I rocked. I was never the best, but I was good enough to make the decision of finding the best among my peers difficult.
Until I didn't.
I stumbled upon this blog:
http://www.polygenelubricants.com
See when the dude last posted? Well pretty much since then, I sometimes get a bit drunk, gather the courage, to fail again, at figuring out how he calculates factorials using regex, or other stuff like that. I don't even know what a Collatz sequence is, and the dude did it in Regex.
I stopped for a while. And then, at work, I met a guy, who pretty much had a ready answer for any problem, any issue, any question, any technical consideration. I felt a nobody next to him. He left now, to work for a brand with few employees, that however is well known around the world.
I wish there were more people like these.1 -
I bought the new dell xps15 57 days ago and now it’s ducked (pun intended).
Last week the screen stopped working. I powered off and back on. Then I get a cpu failure light sequence.
I call dell. To my surprise they have given me next day support for free. The guy comes the next day.
He says he will come between 4-6pm. at 615pm he phones me and says he will be late. I hang out at work to wait for him.
Finally at 730pm he comes and doesn’t have a screwdriver for the laptop. So he leaves to go buy one. 8pm he comes back. It takes him an hour to replace the motherboard by which time I just want to check it works and then go home. It seems good and we both leave the dark office at 930pm.
The next day I notice the sound isn’t working. He also hasn’t closed the laptop properly and there is a dent on the right hand side.
Despite dell giving me next day support it takes a week for them to come back with a solution.
I now have to send it off to them and I’ll be a week without the laptop...
It was incredible when it was working. But laptops aren’t great when they don’t work!
Perhaps I should have got a Mac...4 -
Today I wondered why the heck there where null-Elements in my list.
When searching for elements to add I check if this element == null after adding it to the list. Not my brightest idea. -
I thought: Okay lets update this open source software the day right before my exam. What could go wrong? All previous updates worked without a problem and this is an urgent security fix for RCX.
Of course: It failed. I spend the whole night searching for the error in my config files etc. The error was: A missing null check in start sequence. Had to fix and build it myself as I required the files stored there for the exam.
I learned a lot that day/night about updating only when you have the time to deal with errors... -
Wait, what am i missing? Learning java and got charSequence cannot be converted to string. Isn't a string a sequence of characters??? 🤔🤔🤔6
-
How do you name your servers? or what's you'r company using?
Currently im using <abbreviation><sequence>, But i'm noticing that this does not really scale well.6 -
I love my job,
this is how my normal day goes:
me: *turns on computer*
computer: Good morning, erandria. What will your first sequence of the day be? -
So fun fact about message-passing plugin APIs, everything becomes a parallel programming problem. My lexer (the part of an interpreter that recognizes fundamental syntax elements) spawns a callback thread with request and reply channels, and then messages a plugin which is able to either talk to the callback thread or message the original thread with a successfully parsed token or an abort.
It has just occurred to me that plugins are under no obligation to sequence their requests to the callback thread, which means that having one channel for requests and one for responses no longer suffices; the requests need to each contain their response channel. -
OFFER!!!
3 hours of lifetime for only 1 failed exam!!!
Special: If you buy two you actually can experience your bought lifetime for more than 10 minutes in sequence!!!
OFFER END!!! -
The rear ducking continues. We've built a reliable translator in the dumbest fucking way possible, it's just lovely. I simply reused the structure for feeding data to the VM assembler, an array of arrays, where there's one array of (ins [args]) per node in the parse tree.
It's nice because nodes can be solved out of order without affecting the actual sequence in which the instructions are output. And if one statement (node) equals multiple instructions, you just push multiple entries to the corresponding array, or push nothing if you need to output nothing. Easy as goblin pie.
This is enough to convert an input language to the assembly-like intermediate representation we use for the virtual machine. So then there's doing it backwards: walk the same array of arrays, and map those virtual instructions to a physical architechture. I guess I could do the encoding to native binary myself, it'd certainly be interesting to try, but I'm burnt-out already so I'll just use fasm for now.
Initial test: wrote a test program in my own stupid language, ran the translator, dump output to file, assemble that with fasm, run with r2 -d.
Crashes? No.
Runs fine? Yes and no.
For fuck's sake, I don't have syscalls. Mainly because the VM doesn't have an operating system, lmao. I was testing virtual programs by just freezing state, terminating, then dumping the fucking registers and stack to the console, we have no I/O to speak of. Not even a real 'exit', VM handles that by reading a return value every step like a mentally damaged son of a bitch.
So anyway, I manually paste the linux mambo, you know:
mov rax,60
mov rdi,0
syscall
And NOW our program can end execution without crashing.
Okay then, so does the test code work correctly?
** DRUM ROLL **
Yes.
Ladies and gentlemen, mother fucking PESO is now a compiled language, and going forward I will be expectantly receiving your marriage proposals for reviewing. Oh, but not so fast, we still need a frontend...
Well, we'll handle that in the next few days. I'm just glad to be *nearly* finished with this fucking compiler, I want nothing to do with anything else ever, but we know that's not going to happen, so Lord please end my pain.
No sponsor as this rant has been paid for by tax evasion. -
We have an unit test that tests the average of a sequence of numbers generated randomly using a gaussian distribution. Of course it fails from time to time, it's random! Failing to fail, would mean that the generator is not generating random numbers, therefore failure means success, but success does not mean failure.
Wait, why did we add this test in the first place? -
Started working on a library to allow manipulation of bit sets. It will read in bits in 1 to 8 bit packets and tack them onto a structure that is represented by sequential bits. It will include ways to interpret the bits in 1 to 8 bits per mapping. Each mapping will be able to do logical operations on the bits. The whole point is to be able to take a stream of possibly malformed bits and try and make sense of them.
The inspiration for this is this sequence:
http://therendleshamforestincident.com/...
Yes, it is possible this data is utter bullshit, but I want the library all the same. I think it will be a fun one to write and use for digital forensics of arbitrary data.1 -
any one else use plantuml for sequence diagrams flowcharts er uml etc? if so which editor?
I use brackets because of its live preview -
Went through 60 python packages to see which fails installing on the serve. Took hrs as I have no terminal access but just via jenkins pipeline. So "edit/gitpush requirements.txt and wait" many times. Eventually looped them 1 by 1 in shell. By end of day got the list that installs.
Finally sent the whole list....with confidence
-Takes full 10 mins & Fails......
(panic mode starts)
+Changed the sequence = fails, somewhere else
+1 by 1 again = installs.....
+few random without the culprit =works
+again, whole list = fails, somewhere else
Need to sleep, brain's thinking of eagles1 -
Anyone using SCCM to deploy Windows 10?
If we add Software Updates to the Task Sequence, all sorts of apps get installed too. We have Consumer Features disabled, but for some reason updating during OSD seems to ignore it and installs apps anyways?
Anyone else with this issue? -
Tried installing Arch the whole day... Always crashing at the booting sequence due to nouveau failure. "Pointer to TDMS table invalid" and "Pointer to flat panel table invalid"... Can't even login into the shell.
Fuck this shit... Has anyone tried Devuan? -
So I've been using Duet on my iPad Pro for a couple years now (lets me use it as an external monitor via Lightning cable) and without issue. Shit, I've been quite happy with it. Then the other day, whilst hooked up to my work laptop, there was a power fluctuation that caused my laptop to stop sending power to connected devices. Which is fine - I have it plugged into a surge protector so these fluctuations shouldn't matter. After a few seconds the laptop resumed normal operation and my connected devices were up and running again.
But the iPad Pro, for some reason, went into an infinite boot loop sequence. It reboots, gets to the white Apple logo, then reboots again.
In the end, after putting the iPad into recovery mode and running Apple's update in iTunes (as they recommend), it proceeds to wipe all my data. Without warning. I lost more than a couple of years of notes, illustrations and photos. All in one fucking swoop.
To be clear, you get 2 options in iTunes when performing a device update:
1. UPDATE - will not mess with your data, will just update the OS (in this case iPadOS)
2. RESTORE - will delete everything, basically a factory reset
I clicked UPDATE. After the first attempt, it still kept bootlooping. So I did it again, I made sure I clicked UPDATE because I had not yet backed up my data. It then proceeds to do a RESTORE even though I clicked UPDATE.
Why, Apple? WHY.
After a solemn weekend lamenting my lost data, I've come a conclusion: fuck you Apple for designing very shitty software. I mean, why can't I access my device data over a cabled connection in the event I can't boot into the OS? If you need some form of authentication to keep out thieves, surely the mutltiple times you ask me to log in with my Apple ID on iTunes upon connecting the damn thing is more than sufficient?! You keep spouting that you have a secure boot chain and shit, surely it can verify a legitimate user using authenticated hardware without having to boot into the device OS?
And on the subject of backing up my data, you really only have 2 manual options here. Either (a) open iTunes, select your device, select the installed app, then selectively download the files onto my system; or (b) do a full device backup. Neither of those procedures is time-efficient nor straightforward. And if you want to do option b wirelessly, it can only be on iCloud. Which is bullshit. And you can't even access the files in the device backup - you can only get to them by restoring to your device. Even MORE bullshit.
Conversely, on my Android phone I can automate backups of individual apps, directories or files to my cloud provider of choice, or even to an external microSD card. I can schedule when the backups happen. I can access my files ANYTIME.
I got the iPad Pro because I wanted the best drawing experience, and Apple Pencil at the time was really the best you could get. But I see now it's not worth compromise of having shitty software. I mean, It's already 2021 but these dated piles of excrement that are iOS and iPadOS still act like it's 2011; they need to be seriously reviewed and re-engineered, because eventually they're going to end up as nothing but all UI fluff to hide these extremely glaring problems.2 -
Wanna get the next value of a sequence in Oracle? Oh just do :
SELECT sequence_name.NEXTVAL FROM DUAL
Wanna get the current value instead? Try this query :
SELECT last_number FROM all_sequences WHERE sequence_owner = '<sequence owner>' AND sequence_name = '<sequence_name>';
Yeah thanks Oracle...1 -
I starting developing my skills to a pro level from 1 year and half from now. My skillset is focused on Backend Development + Data Science(Specially Deep Learning), some sort of Machine Learning Engineer. I fill my github with personal projects the last 5 months, and im currently working on a very exciting project that involves all of my skills, its about Developing and deploy a Deep Learning Model for Image Deblurring.
I started to look for work two months to now. I applied to dozens of jobs at startups, no response. I changed my strategy a bit, focusing on early stage startups that dont have infinite money for pay all that senior devs, nothing, not even that startups wish to have me in their teams. I even applied to 2 or 3 and claim to do the job for little payment, arguing im not going for money but experience, nothing. I never got a reply back, not an interview, the few that reach back(like 3, from 3 or 4 dozen of startups), was just for say their are not interested on me.
This is frustrating, what i do on my days is just push forward my personal projects without rest. I will be broke in a few months from now if i dont get a job, im still young, i have 21 years, but i dont have economic support from parents anymore(they are already broke). Truly dont know what to do. Currently my brother is helping me with the money, but he will broke in few months as i say.
The worst of all this case is that i feel capable of get things done, i have skills and i trust in myself. This is not about me having doubts about my skills, but about startups that dont care, they are not interested in me, and the other worst thing is that my profile is in high demand, at least on startups, they always seek for backend devs with Machine Learning knowledge. Im nothing for them, i only want to land that first job, but seems to be impossible.
For add to this situation, im from south america, Venezuela, and im only able to get a remote job, because in my country basically has no Tech Industry, just Agencies everywhere underpaying devs, that as extent, dont care about my profile too!!! this is ridiculous, not even that almost dead Agencies that contract devs for very little payment in my country are interested in me! As extra, my economic situation dont allows me to reallocate, i simple cant afford that. planning to do it, but after land some job for a few months. Anyways coronavirus seems to finally set remote work as the default, maybe this is not a huge factor right now.
I try to find job as freelancer, i check the freelancer sites(Freelancer, Guru and so on) every week more or less, but at least from what i see, there is no Backend-Only gigs for Python Devs, They always ask for Fullstack developers, and Machine Learning gigs i dont even mention them.
Maybe im missing something obvious, but feel incredible that someone that has skills is not capable of land even a freelancer job. Maybe im blind, or maybe im asking too much(I feel the latter is not the case). Or maybe im overestimating my self? i think around that time to time, but is not possible, i have knowledge of Rest/GraphQL APIs Development using frameworks like Flask or DJango(But i like Flask more than DJango, i feel awesome with its microframework approach). Familiarized with containerization and Docker. I can mention knowledge about SQL and DBs(PostgreSQL), ORMs(SQLAlchemy), Open Auth, CI/CD, Unit Testing, Git, Soft DevOps Skills, Design Patterns like MVC or MTV, Serverless Environments, Deep Learning Solutions, end to end: Data Gathering, Preprocessing, Data Analysis, Model Architecture Design, Training and Finetunning. Im familiarized with SotA techniques widely used now days, GANs, Transformers, Residual Networks, U-Nets, Sequence Data, Image Data or high Dimensional Data, Data Augmentation, Regularization, Dropout, All kind of loss functions and Non Linear functions. My toolset is based around Python, with Tensorflow as the main framework, supported by other libraries like pandas, numpy and other Data Science oriented utils.
I know lot of stuff, is not that enough for get a Junior Level underpaid job? truly dont get it, what is required for get a job? not even enough for get an interview?
I have some dev friends and everyone seems to be able to land jobs, why im not landing even an interview?
I will keep pushing my Dev career, is that or starve to death. But i will love to read your suggestions! how i can approach this?
i will leave here my relevant social presence:
https://linkedin.com/in/...
https://github.com/ElPapi42
Thanks in advance!9 -
After nearly four days of fighting with Ruby, Gem, Bundle and a dash of JRuby just to make a plugin for logstash install, I can officially say I feel like Ken Mattingly.
It is all about the sequence, and a metric ton of RAM and CPU cycles and patience.1 -
So I'm sitting here trying to bodge my way through a member system. These fucknuts really made a bad system..
The task: Export a list of users and their info.
Is there an API available? No, who the fuck would need that shit, even tho the system is built upon Odoo, which has an API!
But it has an export function, you just have to log in and press the right sequence of buttons, because you need the running ID...
Here I discovered the first of many security flaws... "What happens if I post the wrong ID?"... Well, I get access to a file that has nothing to do with me or my users.... What?
Well after some fiddling It works, but holy fuck I found a lot of bugs. And this is a system that is launching in 7 days for us.. Some users have been on it for a year....
How can they ship this bad a product? There's absolute no documentation only a 15-page manual. Guess they don't want developers to develop shit that works in junction with theirs.1 -
I am a freshman in college and my group(which is assigned because our numbers are in sequence) is a fucking piece of shit and everyone is a low life who didn't give a flying fuck when i tried to discuss project ideas and shit.
So we have our final project submission tomorrow and the grade depends on how much you learnt and contributed to project more so than how much it succeeded.
And now one of these fucking faggots has the audacity to call me and ask "Hey what do i tell the examiner when he asks about what i did to enhance the project?" Meaning ' how do i steal your credit uWu?'
Trembling with rage i cut his fucking call.
i left my phone on silent and i have 19 missed calls from these stupid fucks in the past hour.I am gonna make them fail this year. BEST FEELING EVER!5 -
I know the video editing software LightWorks has its aficionados. I can see how it's powerful. I've been using it since at least version 12. But my gosh how it screws people over. In the latest version, when you import files into a project and then want to delete _just the reference_ to the files in the project, LightWorks says "Nope, imma delete the FILE, too!" So you can never just start over with an import. When you import a bunch of still photos in one shot, no matter how many, it imports them all as an unwatchably fast 1 second video sequence instead of as an individual file. Like...what? And they've dumbed down the interface so much that there's no toolbar. You have to right-click poke at everything to try to find where stuff is. And right clicking is NON-EXISTENT on a Mac. I had to use a pen tablet to achieve it. I'm too cheap to buy Adobe Premiere for the few times I have to edit video in a year, so I guess it's just ShotCut on Windows for the rest of my life.2
-
Interesting geometric sequence in maths class today. Needless to say, the working out was pretty short.
-
Oracle vs MySQL !
My colleague and I had a long debate on auto increment and sequence :O |Guess who won .. -
We were learning how to code circles to light up in sequence. As it's similar to how code works for Arduino. Cool. Go back to c# in Unity and teach what the code does not just copy.
-
So, today I was helping my cousin with his math homework, then I realized he had found the equation for a sequence of numbers taking the first index as 0 ... I never been so proud in my life.
It was wrong tho :(2 -
A simple sequence error made me suffer for 2 hour . Normally we think location sequence works as lat then long. But for mapbox ,they work in reverse.
-
till a build sequence finishes, i end up checking #twitter, #facebook, #quora, #reddit two times on average.
#androidstudio
#build
#gradle -
For years now I've been "dreaming in code" but in the stupid way, which is only appropiate.
I try to explain it to myself and *I* can't understand it.
One, by some oniric enchantment, is capable of communicating signals through use of some symbolic language; and any time one speaks, they are affecting all that follows.
So a sequence of these, of any size, corresponds to some kind of program, and the self is some sort of collection of mutable structures being affected by them. And new symbols arise from within the self, corresponding to sequences of previously spoken symbols.
This process in itself can be satisfying, for the mere challenge of engaging with it's bottomless complexity, but it also suffers from a complete lack of purpose.
What does it mean? It's all undefined, yet doing something, so it must *mean* something. But what is it doing? One simply cannot grasp it!
I go to bed at night and traverse my tree, I recognize it, I've been working on it for years. Time is different there, you can just keep infinitely building shit, it never ends. Then I wake up and everything makes sense, for a little while.
But what I see isn't quantifiable; I can't turn it into a representation that works outside of a dream. Does it give me some vague ideas for the "actual" code I'm working on, yes of course. Yet it's all so... elusive, I can never put it into words. How exactly I could think of this? Well, it's in my tree, I know it because I wrote it as I slept. But how?
Fucking brains, maan.1 -
So there’s this theory that given infinite time with infinite monkey typing, eventually they will type out the entire Shakespeare
I explained to my gf, I thought it was obvious but she said it’s not possible, and I had to emphasize that’s why it says infinite time.
Well then I thought, I’m gonna make a website where every x seconds it will type a character, and anyone on the website can also type one character every n seconds, and everyone will see the same sequence, on the side panel I will show what words those monkeys actually typed and maybe eventually, we can type out Shakespeare
But it’s also quite boring, tell me what I can do9 -
I want to print the first number in the Fibonacci sequence to contain over 1000 digits. I got fibbonaci to work but I cannot seem to figure out how to implement the "Contain over 1000 digits".
Do I make a list to store the fibbonaci numbers in then do a statement?
My Python 3 Code:
def fibonacci(num):
if num == 2 or num ==1:
return 1
return sum([fibonacci(num - 2), fibonacci(num - 1)])
print(fibonacci(7))7
Top Tags
Weekly Rant
View