- 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? 😡

VueJS FTW!

Today I realised I've been a fucking idiot.
For the last few years I have familiarized myself with libraries like React, VueJS, Preact etc.

All while playing around on my own side projects but when it came to doing actual work (perhaps from a lack of confidence/working experience with them) I always reverted to vanilla js or jQuery because I convinced myself it wasn't the `right` use case or `the project was too simple or small`.

I WAS AN IDIOT.

The below screenshot is a prototype of a n invoicing tool I needed to write which uses VueJS and is implemented in 50 beautiful, clean, maintainable loc. Combined with TypeScript it is a dream - never did I think I would see the day where I could grab an inputs numerical value without prepending the variable with + so I don't end up concatenating them as strings.

If your like me and haven't started using some kind of data binding view framework stop procrastinating and just do it. I feel like I wasted a large chunk of my life clinging onto my old ways.

math be like:

"Addition (often signified by the plus symbol "+") is one of the four basic operations of arithmetic; the others are subtraction, multiplication and division. The addition of two whole numbers is the total amount of those values combined. For example, in the adjacent picture, there is a combination of three apples and two apples together, making a total of five apples. This observation is equivalent to the mathematical expression "3 + 2 = 5" i.e., "3 add 2 is equal to 5".

Besides counting items, addition can also be defined on other types of numbers, such as integers, real numbers and complex numbers. This is part of arithmetic, a branch of mathematics. In algebra, another area of mathematics, addition can be performed on abstract objects such as vectors and matrices.

Addition has several important properties. It is commutative, meaning that order does not matter, and it is associative, meaning that when one adds more than two numbers, the order in which addition is performed does not matter (see Summation). Repeated addition of 1 is the same as counting; addition of 0 does not change a number. Addition also obeys predictable rules concerning related operations such as subtraction and multiplication.

Performing addition is one of the simplest numerical tasks. Addition of very small numbers is accessible to toddlers; the most basic task, 1 + 1, can be performed by infants as young as five months and even some members of other animal species. In primary education, students are taught to add numbers in the decimal system, starting with single digits and progressively tackling more difficult problems. Mechanical aids range from the ancient abacus to the modern computer, where research on the most efficient implementations of addition continues to this day."

And you think like .. easy, but then you turn the page:

While writing a raytracing engine for my university project (a fairly long and complex program in C++), there was a subtle bug that, under very specific conditions, the ray energy calculation would return 0 or NaN, and the corresponding pixel would be slightly dimmer than it should be.

Now you might think that this is a trifling problem, but when it happened to random pixels across the screen at random times it would manifest as noise, and as you might know, people who render stuff Absolutely. Hate. Noise. It wouldn't do. Not acceptable.

So I worked at that thing for three whole days and finally located the bug, a tiny gotcha-type thing in a numerical routine in one corner of the module that handled multiple importance sampling (basically, mixing different sampling strategies).

Frustrating, exhausting, and easily the most gruelling bug hunt I've ever done. Utterly worth it when I fixed it. And what's even better, I found and squashed two other bugs I hadn't even noticed, lol

I did a pretty nasty derivation of third order approximation for first derivative by hand. I got all the nasty Newton coefficients right, and was very precise until THE VERY LAST LINE, where I butchered simple math operations.
I wonder if there is a name for my particular brand of stupidity.

Receive several documents of blog posts from a client, each one titled "Blog $n - $category - $title." Cool, the client gave them to me in order and I just have to plug them in.

Enter blogs on site starting with Blog 1.

Client sees the blogs on the site and loses their shit. "I specifically numbered the blogs so you knew what order to put them in! How hard is it to put them in numerical order? Blog 1 is the newest blog and should be first on the page."

The site displays the newest post first, but because any normal person would have named the oldest blog "blog 1" and counted up from there the blogs are in the reverse order the client expected.

What the hell kind of dense motherfucker numbers their blog files in a manner which requires them to rename every file each time they write a new blog post?

Idea to overhaul the CSS !important system...

Allow it to accept a numerical value much like z-index.

But the max !important level is the current year so that the more current your code, the more important it is.

Works based off the last edited date of your files to prevent cheaters.

My CTO uses an array instead of objectto keep list of items with random numerical keys. I told him you’re creating multiple unintended undefined members in between, he said: yeah that’s how silly JavaScript is :-|

Is it OK to punch a game dev who codes stupid numeric bugs?

So my wife got into Stardew Valley, that admittedly awesome comfort game farming simulator.
She went pretty far in the game, and found some item that was supposed to highly increase the damage she could inflict onto cute little monster thingies.
It didn't work as intended.
Since equipping the piece of shit all her hits did 0 damage. She tossed the item away but the problem persisted. And on and on...
She took to the googles to try and find some explanation, and apparently that is a fairly common bug for mobile devs.
Then she called in the big guns (that is how I'm calling myself in this case, you will see why).

Apparently there is some buggy piece of shitcode somewhere in the game with a numerical insecure routine that overflows the attack modifier. I.e. if it was supposed to increase from 1.990 to 2.010, it actually went all the way down to -0.4.
She was lucky her attacks weren't increasing the monsters' HP.

We found a forum post where some dude said that he managed to edit the game save file and reset the negative-value attack increase modifier variable. Seems easy enough at first, but my wife uses iOS. Nothing is ever so straightforward with apple stuff.

We did get to the save file, she emailed it to me (the file has no extension and no line breaks in it, so we facepalm'd on a couple attempts at editing it directly).
I finally manage to get it into my personal 11-yo laptop... that won't open a single line file that big.

Cue the python terminal. Easy enough to read the file into a string var and search for the buggy XML tag. Edit the value and overwrite into a new file. Send it back to her by email. Figure out how to overwrite the file in iOS.

Some tense moments while the game reloads... and it works!!!! Got some serious hubby goodwill points here.
Srsly, this troubleshoot process is not for technophobes. It is out of reach to pretty much every non-techy user.

And now back to the original question: If I ever manage to find the kid who coded a game-breaking numerically unsafe routine and shipped it as if every test in the planet had waved it bye-bye, can I punch them? Or maybe buy them a beer, let's see how I get to cash that hubby goodwill tonight :)

Today my boss sent me something that smelled fishy to me. While he was trying to simulate Excel's rounding he faced what was to him unexpected behaviour and he claimed that one constructor of the BigDecimal class was "wrong".
It took me a moment why this was happening to him and I identified two issues in his code.
I found one fo the issues funny and I would like to present you a challenge. Can you find a number that disproves his claim?
It's Java if anyone was wondering.

double d = 102.15250;

BigDecimal db = new BigDecimal(d)
.setScale(3, BigDecimal.ROUND_HALF_EVEN);

BigDecimal db2 = new BigDecimal(String.format("%f",d))
.setScale(3, BigDecimal.ROUND_HALF_EVEN);

BigDecimal db3 = BigDecimal.valueOf(d)
.setScale(3, BigDecimal.ROUND_HALF_EVEN);

System.out.println(db); // WRONG! 102.153
System.out.println(db2); // RIGHT! 102.152
System.out.println(db3); // RIGHT! 102.152

P.s. of course the code itself is just a simple check, it's not how he usually writes code.
P.p.s. it's all about the numerical representation types.

It's high time people start understanding the difference between 0 and NULL. A zero is a numerical 0 and null is just .

During my undergraduate studies I had a Numerical analysis course. The lecturer is an old professor who was the dean of the faculty at the time, during all lessons he'd talk about his grand children and how the course is important to us the engineers. Not for a moment did he speak of the material it self... Came the test - 10 fucking questions of prove and solve in 3 hours. Had to learn the course from Indian fellows on YouTube...

Going to work with GSL numerical library. Tell my family do not worry and that I will miss them.

First and foremost, students should be carefully taught the logic and mentality behind programming. Most of the time I see that the introductory programming courses waste so much energy in teaching the language itself. So students kinda just get fucked cause many people end up ending the course without having actually gained the "programming perspective".
Stop teaching pointers and lambdas and even leave the object oriented stiff till later. If a student doesn't know why we use a For loop then how can they learn anything else.
I believe once that thing in your brain clicks about programming, everything goes smooth from there... kinda :P

Second of all, and this pertains mainly to the engineering and science disciplines.
We need a fundamental and strong mathematical foundation. And no I don't mean taking fucking double integrals. Teach us Linear Algebra, Graph theory, the properties of matrices, and Probability theory.
One of the things I suffered from most and regret in university is having a weak foundation in math and having to spend more time catching myself up to speed.
It's so annoying reading a paper on a new algorithm or method and feeling like an idiot because I can't understand what magic these people did.

Numerical Methods...
Ok this is more deeper, maybe a 2nd year course.
But this is something we take for granted.
Computers don't magically add and subtract and multiply.
They fuck up.
And it'll bite you in the ass if you're not even aware that the computer we all love so much isn't as perfect as we think

Some hardware knowledge.
Probably a basic embedded systems course with arduinos
just so you can get a feel for how our beautiful software actually makes those electrons go weeeeeeeee

And finally
Practice practice
Projects projects
like honestly
just give me the internet and some projects
Ill learn everything else
Projects are the best motivation
I hate this purely theoretical approach
where we memorize or read code and write these stupid exams
Test what we are capable off
make us do projects that take sleepless nights and litres of coffee
And judge our methods, documentation, team work, and output

Team work skills and tools (VCS, communicating, project management, etc.)

Documentation and Reporting
Properly
:)
maybe even with LaTeX :D

Yeah that's the gist of whats on my mind at the moment regarding an ideal computer science education
At least the foundations
The rest I leave it to the next dude.

I love this documentation about System. nanoTime()

Differences in successive calls that span greater than approximately 292 years (2^63 nanoseconds) will not correctly compute elapsed time due to numerical overflow.

Can I confidently say that no service will ever break this limit?

A numerical and data analysis platform for individuals and teams

Feel like shit, can't focus on work, exam coming up in about 2 weeks...
These stupid numerical algorithms are easy, and yet I manage to get stuck on every shitty little detail, I panic, and I completely lose focus.

This shit has been destroying my academic career... Can't focus properly anymore, cannot study even the simplest things - things that I used to do off the top of my head just a year ago.

My sleep schedule is FUBAR, it's a miracle if I manage to stick to the same timezone for three nights in a row.

Yet I'm still learning new things, trying out stuff and solving problems. Just not the ones that I need to pass my exams.
And before anyone says that university is useless and whatnot: I'm studying aerospace engineering.
I love it, I'm having great fun, learning amazing things, and I've met a lot of amazing people thanks to it. It's one of the few choices in life that I am certain of, and would gladly repeat over and over again.

I've burned myself out from stress, far harder and longer than I've ever done before, and I cannot figure out a way to recover from it.
I've been doing better in the last month or so, but I still cannot get any proper work done, and this is gonna bite me in the ass really hard, once again.

Funny story: I had 3 days of break between the end of the previous semester and the beginning of this one. 3 days of pure freedom.
In those 3 days, I spontaneously reverted to a normal sleep schedule (didn't even need an alarm clock) and felt like a mountain had been lifted off my shoulders.

A year ago I had no idea what truly panicking in the middle of an exam felt like.
My mind had never gone completely blank.
I had no idea what impaired cognitive ability felt like.
This shit is scary.

Why do our minds have to make things so complicated?

I've been in the industry (developer for Finance, backend, quant stuff) for 5 years, and I was thinking to starting looking for a remote developer position in a couple of years.

Do you have any advice? Shall I start studying something? I'm proficient with C++, python and C#, but mainly for numerical algorithms, but I'm sure I can learn other stuff.

Published on BBC, GCHQ have set the challenge below. Would make a fun simple coding challenge. My thought is to brute-force, is there a more efficient way to solve it?

"Take the digits 1,2,3 up to 9 in numerical order and put either a plus sign or a minus sign or neither between the digits to make a sum that adds up to 100. For example, one way of achieving this is: 1 + 2 + 34 - 5 + 67 - 8 + 9 = 100, which uses six plusses and minuses. What is the fewest number of plusses and minuses you need to do this?"

Edit: disclosure: I believe the challenge has passed already and I'm too lazy to enter anyway so don't worry about me or anyone stealing ideas!

A friend of mine studies mathematics and he told me about a project he has to do and we worked on it together a bit: Numerically calculate the arctan.
He dug out a nice series by (the one and only) Euler and we started massaging the thing to get it into a bit of a nicer form (there were (n!)^2 and other shenanigans) and we eventually succeeded after some stupid simple errors and arrived at a quite simple recursive progression. After that he also found a formula to transform a given value into the region where our formula actually mimics the arctan and we proceeded to proof this formula. The programming was straight forward and now we only have to find the radius of convergence which I suspect is pi^2 (but no proof).
I had a lot of fun doing this, fiddling around with the formulas and then programming it to see it actually becoming real.

Any signal processing, machine learning, numerical computing devs or enthusiasts here

Who the fuck invented recursive😡, it sucks in numerical computation, it takes excessive amount of memory, recomputation and fffffffuck😡. To calculate fibonacci of 50, it feels like MARK I. fuck they do nothing more than calling, like Peter calling Peter...😡

so hey in this magical world of numerical make believe what is the takeaway ? and ps aren't you guys sick of prime number gens hidden on your machines ?