/dpt/ - Daily Programming Thread
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Old thread >>54469966
Only good programming related picture I had for the OP picture edition
Tell me what you scrubs are working on
>>54479913
First for Perl comeback
>>54479913
FIRST4TRAPS
>>54479913
Second for D
Anyone got a good resource for studying all of the must know algorithms?
>>54479913
what fucking lang is that
>>54479978
APL, it requires a special keyboard to use
Whats the best framework for making a very very basic game in c++.
Literally only want to make a single player game of scramble.
Im handicapped when it comes to guis as well.
>>54479940
i want to suck her feminine D
>>54480007
get input through stdin, prinnt it to stdout
>>54479913
Working on a drum practice exercise generator. Very slow progress though. I suck at programming.
>>54480038
maybe i could drum your bum
>>54479913
So /g/, what do you think about this article.
https://reaktor.com/blog/node-js-satellite-means-anyone-can-space-programmer/
Note that Reaktor is the most hip and fashionable web dev company in Finland.
>>54479913
an AI for a board game I made
>>54479913
We all know C is the best language, but what's the 2nd best?
My vote's on Python
>>54480136
C++ because you can still write C and it will compile most of the time
>>54480136
Scheme
>>54480136
Java or Haskell
>>54480153
>most of the time
webshit detected
What should I do as summer project, everyone says, "whatever you have a problem with" but that's never any use.
I'm not trying to make the next big things just something to keep the skills sharp/learn a new language.
Tips /g/?
>>54480007
Use C# + Unity
>>54480156
>>54480157
worthless
>>54480170
nice meme
>>54480165
you can work on my project if you want
>>54480161
It is not all backwards compatible tard, there are valid C code that is not valid in C++
>>54480183
And what does that entail?
>>54480165
>whatever you have a problem with
Oftentimes, I find myself doing something multiple times a day, and then i figure out how to automate it.
>>54480194
daily sucking each other's dicks
>>54480183
What is your project?
>>54480194
whatever I tell you to do basically
>>54480136
>C is the best language
Okay, Rajesh.
>>54480170
This, in all honesty.
Literally the easiest way to dump out a cross-platform, working game.
I have to make a GUI for a University graded project in Java.
I missed the lecture on the basics, so I'm shit outta luck. Is the introduction to the topic on the Java website good enough, or are there better tutorials?
>>54480190
>I'm a css cuck
>>54480161struct foo { int x; int y[2]; };
struct foo x = {.y = {[1] = 7, [0] = 4}, .x = 6};
>>54480215
>rajesh knows c
>anon doesn't
m8...
>>54480230
>the lecture on the basics
>one lecture is the difference between knowing how to write an application and knowing nothing
Jesus christ, are you lectures 8 hours long?
There are intro books that do GUI alongside basics. Murach's is good for C# in this, not sure about Java.
>>54480223
>2016
>still thinking about cross-platform
There are too few architectures and all modern compilers work for each of them
>>54480215
indians hate C
>>54480241
>html programmer
>>54480223
>dump
you got that right
>>54480190
the strawman had no chance, amirite?
>>54480275
>virgin NEET
>>54480328
>got told
>now mad
>>54480136
Scheme is better than C.
>>54480182
Nice bait
>>54480361
sure
>>54480363
python is better than scheme
>>54479913
Any app developers here?
How do you take an idea and implement it? Where do you start?
>>54480394
>app
kid, you mush be 18+ to post in this subreddit
>>54480411
so what are you doing here?
>>54480394
download an android/ios book. Follow the steps, and make ur first game.
>>54480411
As in iPhone apps, Android Apps. So yeah, apps.
>>54480420
apps
>>54480430
so yeah, kids are not allowed on this site
>>54480425
Oh, I am already learning how to program for iOS. What i mean is, how do you take an idea from thought, to coded up. Do you start with UI design? Code? Other?
>>54480394
I buy ideas off of business people. I then go and build it. Usually they give me 10-15% of the equity in the idea! I've made a fortune off of these morons.
>>54480458
Other.
>>54480385
I disagree. I'd also like to say that Racket is probably better than both, because it's a LISP, but it's also got a good standard library.
>>54479964
College
>>54480500
you'd be wrong
>>54480500
Faggot, python IS better than Scheme
>>54480528
>>54480535
ur both fuckign retarted
Is blender the best free 3D modelling tool or just the most popular?
>>54480535
How can you be better than scheme with lambdas and expression ifs that are so shit?
>>54480543
>no u
Mine
https://play.google.com/store/apps/details?id=eu.depa.captionr
>>54480559
yes
>>54480566
How can Scheme be better when it can't do a quarter of the things python can do?
Checkm8 altruists
>>54480543
nah you are fampai
>>54480566
how can you be better than python with worthless parentheses and standard library that are so shit?
>>54480467
>10%
i don't think an "ideas guy" should be receiving 90% of the income on an idea that they had no hand in building on their own
>arguing over 1's and 0's
>arguing over electricity being passed through various gates to create a meaningful result
>>54480624
>implying creating the app is the only thing that makes it successful
son i have a bad news for u
is 7 months a lot?
i mean i've made some progress, but there's so much
>>54480624
the guy who sold me his 'uber for schoolchildren' idea could be rich but he only made a few pennies :)
>>54479940
more like double d
>>54480624
he's memeing
>>54480535
>>54480385
almost anything is better than python even lisp
>>54480743
I C what (You) did there Carlos
>>54480743
lol nice
>>54480778
nice meme pajeet
>>54480795
nice meme literal underage minecraft playing shitkid
>>54479913
How do I add my own custom autocomplete templates in atom? cant find shit on the web about this
plz help
>>54480817
nice meme pajeet
Is there any negative to aligning every label to 16 bytes on x86? Especially if the preceding operation is a jmp?
>>54480837
>atom
nice meme
>>54480601
>standard library
Try knowing your memes. Racket's is perfectly good. Besides missing features can be added, bad design decisions can't be fixed.
tfw no gentoo cock inside my bp
>>54480855
everytime
fucking eat shit autistic ide meme lord
>>54480837
Don't use Atom. I went down that rabbit hole, and it's just atrocious
>>54480914
>is against ides
>uses a web browser to code in
lmao
>>54480007
SFML is probably the most used modern framework.
>mfw realized i spent 7 hours yesterday getting one small aspect of my emacs setup just right, instead of actually working on my project
help guys i think i'm addicted to emacs, what do?
>>54480840
>python is all i know
ok babby
>>54480929
No, SDL is better than that piece of shit
>>54480950
SDL is fucking old and hardware acceleration is disabled by default IIRC.
>>54480931
Keep going, it's worth it.
>sunken costs fallacy
I've never heard of such... ?
>>54480939
nice meme pajeet
>>54480960
I don't think I'll be switching anytime soon, because I essentially have a C/Python IDE set up exactly to my preferences. It's also my IRC client, and PDF viewer.
>>54480929
It's taught me matrices. No seriously, my teacher was all like
>What the fuck is with these 4x4 matrices for non linear 3x3 transformations anon? Can't you just waste neurons doing it like everyone else???
>>54480847
Downside of alignment is always wasted space. You can decide for yourself if this is a worthwhile trade-off (it probably is unless you're very space constrained).
>>54480959
still better than SFML
>>54480991
He's not doing 3D dumb fuck.
And Matrices are piss-easy.
>>54481001
Cool, good for you. I bet you get a lot of things done.
>>54480981
Agreed. A Lisp interface is the best approach. Anything else annoyingly reinvents the textbox in a slightly different way. I don't use it to pdfview tho, it crashed last time. I should try again.
>>54480959
>SDL is fucking old and hardware acceleration is disabled by default IIRC.
only if you use it's blit/text etc function
if you use SDL only to blit the image you keep in some unsigned char scrbuf[320x240]; I doubt you lose anything
also you can easily hook opengl with sdl
>>54480628
>there are people on this board that didn't read The Art of Electronics
>>54480921
where did you get that im against ides you sperg
>>54480915
care to elaborate?
>>54481039
>Ask for a c++ framework
>reply with a C framework created the previous millennium
Good job, anon.
>>54481020
>Cool, good for you. I bet you get a lot of things done.
Thanks, I do. Finished my emulator and some games in it thanks to SDL
>>54481035
pdf-tools works really well for me on Linux, and they supposedly support building on Windows through mingw, but I haven't tried that out yet.
>>54481070
SDL is configured for native C++ use, it may as well be a C++ library as well. The benefit over SFML is that it's not shit
>>54481020
>>original content
>LOL NO UR DUMBB
1/10
>>54480959
Didn't SDL2 completely change this, though?
I thought SDL2 brought a lot of new acceleration features and is now more performant than SFML.
Can anyone weigh in on this? I used SFML a couple years back for some shitty games, but if SDL has really improved as my as I've heard, I would rather use that now.
>>54481098
>Still calling something shit without anything to back up your claim
Yup. You sound totally credible.
>>54480929
only neckbeards making VERY basic games use SFML
>>54480999
I figured I shouldn't do it in a few cases, like control flow inside a tight loop. NOPs still take 1/3 a cycle, and there can be up to 15 with a 16B alignment. I am working through PE in assembly and I thought I'd try aligning the code (hadn't cared before, but after realizing my C code was performing faster than, I thought I'd give it a try) and it cut execution to less than half of what it was.
There is a ton of space on modern hard drives. I really wonder what the size differences are in an actual application.
>>54481117
>SDL has really improved
only trouble I really had with SDL is that hard to link SDL_Mixer in mingw
>>54481140
>VERY basic games use SFML
>single player scramble
Perfect, then.
>>54481133
Still not worse than the person defending SFML without backing up his claim
>>54481152
I see, thanks for the input
What about other aspects of SDL?
How hard is it to intertwine SDL primitive shapes with some of my own OpenGL code?
>>54479978
Perl, you have to be special to use it.
>>54481142
I'd be more concerned about RAM usage, and more importantly, usage of the instruction cache, which is more limited, and more relevant to size of code.
But yes, profile your shit.
>>54480457
>Pissy that someone is coding mobile
Someone has to do it anon, just be glad it isn't you.
>>54480458
Normal design principals say that you should first try and refine the idea, break it up into it's core components, figure out multiple ways of creating those components, draw up and design UI, then code away.
>>54481208
>Perl
>literally says APL in the header
expect nothing less
#include <stdio.h>
main(){
printf("ПPИBET\n");
return 0;
}
why this dont work?
>>54481046
I haven't, only book I've read (that wasn't comp. history) was the Blue Nowhere. What's it about anon?
>>54481255
You're a dirty commie
>>54481255
Because you're trying to use moon runes.
>>54481255
it works for me. also fix your main signature, its not the late 70s any more
(your terminal probably is set to the wrong locale/codepage)
>>54481255
implementation defined
Non-programmer trying to learn C, what terminal program should I try that will be interesting?
>>54481203
>How hard is it to intertwine SDL primitive shapes with some of my own OpenGL code?
You just include GL header like you usualy do
SDL creates window for you and manages the HW descriptor, handles events/keyboard/mouse/joystic and e.t.c.
when you want to update screen - you just
SDL_GL_SwapBuffers();
>>54481316
>C
>doing anything interesting
>>54481255
лoшapa, ты пиши чтo тeбe кoмпилятop cкaзaл лoл
>>54481334
pelle c
>>54481334
Agreed
>>54481316
>what terminal program should I try that will be interesting?
https://www.youtube.com/watch?v=ew5x7Bhxl5U
>>54481334
on ne po ruski otvechaet, tvarb
>>54481334
cyкa блять
зa cтaлиa! ypaaaaaa!
>>54481409
>on ne po ruski otvechaet, tvarb
oн тeбe oшибкy гoвopит cyкa блядь RUSH B
>>54481442
>RUSH B
dnina tbi
Another idea for a project: Take Tiny Scheme, make it smaller/more modular or some shit (i.e. if you're not using the math functions, you can toss them out. If you're not using the vector functions, you can toss them out, etc...). Call it Planck Scheme.
>>54481487
post feet u dumb slut
>>54481500
he probably has really gnarly feet
>>54481487
all you need is lambdas
>mfw I realize that the "Observer pattern" is literally just a collection of objects that have a common method
What the fuck is special about this?
>>54481517
but he posts trap pics on 8ch all the time
>>54481360
Fine, what console programs should I try?
>>54481529
>mfw I realised dependency injection is basically a constant (final) reference.
Naming things allows us to discuss them. Nevertheless, we should always stay aware of the limitations of these names.
>>54481214
>I'd be more concerned about RAM usage, and more importantly, usage of the instruction cache
GCC on O2 seems to like the idea of aligning most labels and all functions.
Question though.lea rdi, [rdx+5]
I've seen GCC output operations like this before. Is this really just addition? I'm guessing it's an optimization, offloading the operation onto an AGU instead of over-committing to the ALU ports. Is that correct?
>>54481526
lambda, if, +, -, =... not much else that you need... but to be honest, I'd be rather pissed if I didn't have define and a few common scheme functions.
>>54481500
Why do you want to see my stinky feet?
>>54481563
No, actually I do not. I don't think I recall ever posting any pictures of myself on 8ch.
>>54481605
you don't need any of those if you have lambda
What, exactly, is the point of struct alignment and padding?
Since x86 systems are byte-addressable, why would it matter if we leave a certain amount of space between data values in the struct?
Can't you just squeeze all of them together and access the bytes you want?
>>54481644
okay, so how to do you do addition with just a lambda statement. (no reader macros. just a lambda)
>>54481680
https://en.m.wikipedia.org/wiki/Church_encoding
>>54481585
jesus fuck i always thought dependency injection was some ebin meme but it's fucking trivial
why do you need some fucking framework for that?!
>>54481680
Church encoding.
So I bought Modern C++ Design for cheap a while ago with the intent to improve my coding skills but as soon as I got to the 10th page I realized it is waaaaay too hard for me still.
Like even if I try and read it, I feel like I need easier stuff. I'm not a beginner, but I'm not a pro either. I'm at an almost-intermediate level, if that would make sense.
I actually tried to search online before buying it and figured out it would be fine, turns out it wasn't.
So, given you guys don't know shit about me, do you have something to recommend, still? I just wanna learn..
What are you working on in the functional paradigm?
I'm coding a library for linear algebra and stats in Scheme.
>>54481690
>always thought
>meme
classic 4tard: doesn't know what the fuck he's talking about, it must be a meme
>>54481680
f x = 0
f f x = 1
f f f x = 2
f f f f x = 3
x+1 = f x
e.g.
2 + 1 = f (f f f x) = f f f f x = 4
x+y = f^(x+1) y
>>54481700
Developing a language based on a type theory with observational equality.
>>54481689
I know what church encoding and church numerals are. I'm asking you to write a scheme expression with just lambdas to do addition.
>>54481712
tell me what's the point of shit like guice
>>54481587
Ahh, turns out it's still put into an ALU, but it has other uses. You can add up to two registers and an immediate with the same instruction, it doesn't alter the flags, and you can specify the destination apart from the source, like what is in the example.
>>54481696
How much have you programmed?
Also C++ is a pretty terrible language. There's a reason the guy who wrote that book became one of the main guys in the D community.
>>54481721
>I know what church encoding and church numerals are.
>I'm asking you to write a scheme expression with just lambdas to do addition.
Pick one.
im taking a shitty class at uni over summer in a few weeks
i havent looked at assembly in a while (my shitty uni uses MIPS)
this class requires that i use MIPShit assembly, give me an idea for something that i could work on to kind of refresh my memory on assembly
>>54481713
but you still need some kind of a define statement for any of this to be practical right
for exaple the x and the f etc
Ok guys, how do we turn C into a perfect language that will never be beaten? C is great, don't get me wrong, but some features would be incredible to have, such has namespaces, function overloading, direct references, and a proper macro system that would blow C++'s templates out of the water.
What other features would you like to see implemented in or around C? Keep in mind that the main goal is to add pre-compilation features, so the language would still be as fast as it is.
>>54481742
literally C++
>>54481737
What's wrong with MIPS?
>>54481674
pls respond
>>54481700
still getting ready for the next release of my telegram bot library. it's up-to-date for the 2.0 API but I want to fix up the docs a bit and then add some convenience functions before I push.
>>54481721
I mean ideally you'd still have define like Ruby was saying, but you could just copy paste the function to add around whenever you need it
>>54481587
>GCC on O2 seems to like the idea of aligning most labels and all functions.
Because unaligned memory access often is worse than a few cache misses loading extra code into the instruction cache.
>lea
Load effective address instruction. Basically a fused multiply add instruction on integers, except it's a shift and add rather than a proper multiply and add (so you can only multiply by powers of 2). It's original intention was for array access (think: base + offset * sizeof(object)), but it can be used for a lot of optimizations.
>>54481738(define foo 12345)
(print foo)
can be transformed to((lambda (foo)
(print foo))
12345)
>>54481723
don't worry your little head, it's surely just an ebin meme :^)
>>54481748
its not used anywhere
its shit
>>54481742
C code that generates other C code
AST macros
currying, ad hoc polymorphism, namespaces
done
>>54481731
I've been programming for years (maybe 5+?) but only as a hobbyist. I know C++ is terrible, but I like it. It's not the only language I know anyway.
>>54481765
low effort/10
>>54481767
Assembly in general is useless if you look at it in that sort of naive way
The concepts, which are what matter, are the important things
>>54481674
think about cache lines in a cpu, think about their width. think about cache locality and cache coherence. think about the penalities of missing out on a cache hit
this is why padding and alignment can be important, if you need data to fit in the cache (any cache) you have options of aligning it, packing it or padding it so the struct fits.
also what if you're on a memory constrained system? say you have like 68 bytes, or even 34 bytes of memory total (on a PIC for example).
>>54481066
The plugins that are out there, even the ones with a million downloads, are unacceptably slow (t. 8GB late 2012 Macbook Pro). The only workflow which isn't frustrating as hell is one where you have minimal stuff going on, which sorta kills the whole point of even using Atom in the first place.
Honestly, if you have OSX or Linux, Emacs might be worth looking into.
>>54481782
>expects effort to be explained basic shit
>as if you can reason with the mentally handicapped
please, stick with "ebin meme"
>>54481746
Nah, nigga, C++ is great, but there's a lot wrong with it.
>>54481806
>he doesn't know what guice is
>pretends it's not a shitty meme
fuck off to /b/
>>54481735
the topic was, "you don't need addition to solve this problem for a planck-style scheme."
it fits both of those, or it fits neither -- thats the point I was making. the math exists, but can you do it in tiny scheme (as the OP suggested)? (not directed to you, whichever anon was just saying "lambda" instead of answering the other guys question with an implementation -- this is the dpt afterall)
>>54481762
I know this, but you still need a define statement for functions, otherwise it would be impractical to copy paste this anon. function all over the place
this in the context of making a new language
unless one can define a define statements purely in terms of lambdas, which one probably can desu
>>54481820
this. it's kinda like old versions of Perl. huge language where all the features are hit-or-miss and half are amazing but the other half are pretty terrible. as long as you know what to avoid it's not too bad.
>>54481529
>tfw the observer pattern has no observing and instead has a lot of notifications
>>54481841
well I'm on my phone right now and can't be arsed trying to type code
if I were sat down at a computer I'd actually provide the examples
Can I have ffmpeg send images directly to my program rather than saving them to a file and then reading that file with another program?
I feel like this has something to do with the concept of pipes but I'm on Windows and also fairly noob.
>>54481841(define (foo x) (...))
is just(define foo (lambda (x) (...))
which can be transformed in the same way.
You wouldn't want to do this, of course, but it's a good exercise in language implementation.
>>54481793
But if we compress a struct's values closer together, won't it be better for cache locality, as there is a higher chance for different values in the struct to be loaded into a cache line, because there is no wasted "padding" space between data values?
If I'm on a low-memory system, then wouldn't it be better to drop alignment all together, and pack everything as much as possible?
>>54481887
Forgot a parenthesis on the second snippet, but you get the idea.(define foo (lambda (x) (...)))
How is my implementation of the AKS primality test? (I know python, but it's a poc)
i just cant finish this!
excercise is to reverse an integer.
so 1234 should become 4321
54321 -> 12345
etc...
prohibited are loops and just cout<<;
the reversed number must be received by return statements from recursion. my code gives me my original number back.
anybody an idea?
int turn(int a, int &sum) {
if (a) {
int m = a%10;
return m +
10*turn(a/10,sum);
}return 0;
}
int main() {
int sum=0;
cout << turn(12345,sum) <<
endl;
return 0;
>>54481850
>>54481820
There are a lot of really interesting libre libraries which get around a lot of the bullshit parts of c++, like Folly (https://github.com/facebook/folly).
I think that when c++11 rolled around, with auto especially, it went from large language with some great features to huge but manageable language with some great features.
>>54481962
wait theres the sum missing;int turn(int a, int &sum) {
if (a) {
int m = a%10;
sum = m + 10*turn(a/10,sum);
return sum;
}return 0;
[(code]
>>54481962
void printlast(int a) {
if (a < 0) {
std::cout << "-";
printlast(abs(a));
}
if (a > 10) {
std::cout << (a%10);
printlast(a/10);
}
else
std::cout << 0;
}
>>54481971
>it went from large language with some great features to huge but manageable language with some great features
Pretty good.
>>54482007
thanks but print or cout is prohibited
sum must return throughreturn
>>54480931
>>54480931
I'm almost done customizing my Emacs setup. It only took about 8 months. Just a few more weeks to go!
>>54481962
I hope this isn't a class.
There's no case in the real world where you would be given arbitrary limitations to dick around with numbers.
just char buf[log10(num) + 1], sprintf the number and reverse the string in place, and atoi it back.
Hi /dpt/. I have a project I am looking to start but it is much larger than any project I have done before so I am having trouble wrapping my head around how I should structure it.
Are there any good concise resources to learn how to structure medium sized software projects? In the past when attempting to do something like this despite thorough planning I have still found myself buried in spaghetti code.
>>54481971
Definitely, before C++11 I just couldn't bring myself to use the language.
The main "problem" I see with C++ is that after dealing with so many languages, some really stuck with me for the way they handle their name resolutions and things like that. I don't think the C syntax is the syntax that is going to give us the best language ever. For me, the best language even is Lisp. It is concise and predictable, as well as extendable as fuck. I want to write a language that has a Lisp like syntax (using parentheses everywhere for separations and shit), but fully compiled and with 0 underlying systems (just as C is), so it is as fast as C and potentially even more.
If only I wasn't so lazy and got around to learning how to write debuggers...
>>54481962
Don't know if you are allowed to use pow and log functions, but here's my take on it:#include <stdio.h>
#include <math.h>
int turn(int num, int digits) {
if(digits > 1) {
int temp = turn(num/10, digits-1);
temp = (num%10) * pow(10, digits-1) + temp;
return temp;
} else {
return num;
}
}
int main() {
int mynum = 12345;
printf("%d\n", turn(mynum, (int)(log10(mynum))+1));
return 0;
}
>>54482218
kys
>>54481962
>recursion
lol
>>54482283
>kys
n-no bully pls
>>54480136
I'd probably say python too, although I've never used it for the web
>>54482218
thank you very much!
unfortunately no external libraries were allowed
>>54482072
it was a test in a class which i couldnt finish
>>54482283
pls no bully CS not my major but im willing to learn it
>>54482340
write it using a loop and then convert it into the recursive autism
Just messing around with haskell to learn a bit, I made these two functions which you pass a list to, and it returns a list with the numbers which aren't square numbers removed. The first one appears to be very slow, and the second one is kinda ugly but works. How would I do this better?ispow xs = [x | x <- xs, x `elem` [y^2 | y <- xs]] --very slow
ispow2 xs = [x | x <- xs, if floor (sqrt x) == ceiling (sqrt x) then True else False]
>>54481962int rev(int n, int ret)
{
if(!n)
{
return ret;
}
else
{
ret = ret * 10 + n % 10;
return rev(n / 10, ret);
}
}
>>54482439
dunno why the code section is super long, guess i accidentally hit enter like a retard a few too many times
>>54480136
>>54480156
But Scheme and Common Lisp are the actual best languages.
>>54482439
It will look nicer if you separate the concerns of testing for a square number from only taking elements that satisfy a predicate. The second part already exists as filter, by the way.
>>54482543
Absolute dumbass
>>54482459
thank you so very much
no i feel sad
where do you guys find all this motivation to program?
my motivation dies pretty quickly...
>>54482591
It feels nice creating useful programs from scratch.
The fact that you can create something from nothing really motivates me.
>>54482569
It's also TCO
>>54479913
Why do I get SIGPIPE'd when I send()?
My connection should still be open right?
I'm just trying to dump html.#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netdb.h>
int main(int argc, char *argv[])
{
const char *host = "www.google.com";
const char *port = "80";
int rv;
struct addrinfo hints, *server_info, *rp;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
hints.ai_protocol = 0;
rv = getaddrinfo(host, port, &hints, &server_info);
if (rv)
{
fprintf(stderr, "%s\n", gai_strerror(rv));
return 1;
}
for (rp = server_info; rp != NULL; rp = rp->ai_next)
{
sfd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
if (sfd == -1)
continue;
if ((rv = connect(sfd, rp->ai_addr, rp->ai_addrlen != -1)))
break;
close(sfd);
}
if (!rp)
{
perror(strerror(rv));
return 1;
}
freeaddrinfo(server_info);
char buf[256];
const char *s = "GET / HTTP/1.1\r\n\n";
send(sfd, s, strlen(s), 0);
for (int i = 0; i < 256; ++i)
{
recv(sfd, buf + i, 1, 0);
}
puts(buf);
}
>>54482439
The if is unnecessary. == returns a Bool.
Also, the type is probably not what you want:ispow2 :: (RealFrac t, Floating t) => [t] -> [t]
I honestly feel like I have the dumbs after reading that error in pic related.
Aren't SLINK and struct Snod* supposed to be the same thing?
>>54482764
A data object and a pointer to a data object are different things
You'll have to initialize *SLINK separately
>>54482439
first is slow because its O(n^2) and the second is O(n). List comprehensions are basically for loops. I'd do this with filter, which has type filter :: (a -> Bool) -> [a] -> [a]ispow3 xs = filter (\x -> floor (sqrt x) == ceiling (sqrt x)) xs
>>54482909
and the other anon is right, you should split up the test logic from the filter logicispow4 xs = filter isSquare xs
isSquare x = floor (sqrt x) == ceiling (sqrt x)
>>54483002
that is a lot nicer, thank you anon
>>54482439
On top of what others said, your first function doesn't actually work unless you pass it in [1..x].
>>54482796
Urm.. How?
Image viewer with tagging.
If you like, you can take a look at github/lehitoskin/ivy
>>54483196
what is the tag itself? Just wondering. Do you just attach a random string to it or something?
CIA recruiters at my university. Tempted.
>>54483258
What does CIA even do anymore?
>>54482107
one of my friends on IRC has been implementing a Common Lisp-based language from the bottom up (his own assembler, linker, IR, etc.) that's got semantics pretty similar to C. It's basically as low-level as C but has more Lisp-y features like macros and homoiconicity. He hasn't released it yet (pretty sure it's gonna be GPL though) but from the demos I've seen it seems to work quite well. I think that the biggest problem to happen to C was the syntax choice, because it castrates the whole macro system and makes so much of the syntax feel hacky.
>>54480500
>Racket is better than Shceme
Retarded tripfags are retarded. Racket is just an implementation. It used to be called PLT Scheme and only changed because MIT is Jewish about the Scheme trademark.
If Racket isn't Scheme then nothing is Scheme except for mit-scheme and then I don't know anyone who uses Scheme.
>>54483290
They fund terrorists in the middle easts and accidentally get in proxy wars with other parts of the US funding other parts of the middle east.
>>54483312
Homoiconicity essentially damns your language to being some kind of lisp.
>>54483290
Don't know. Might be worth looking into though.
Pros:
+ Cushy government job
+ Pay is probably high
+ Badass
Cons:
- Have to live in DC
- People will probably hate you because US foreign policy.
- May not be able to tell people about badass job.
>>54482724
http://stackoverflow.com/questions/18935446/program-received-signal-sigpipe-broken-pipe
http://stackoverflow.com/questions/5196971/tcp-client-server-sigpipe
http://www.unixguide.net/network/socketfaq/2.19.shtml
>>54483242
The taglist appears as a string inside the text field, but internally it is a list of strings that is associated with the image's path.
>>54483196
really cool David
>>54483350
>only changed because MIT is Jewish about the Scheme trademark.
Then what about, say, Chicken Scheme? What did the Racket guys do to piss off MIT?
>>54483433
Why not make a simple extension to some known image format to allow a text chunk? (Or use one that already has that functionality). It should be trivial to convert to that image type if it is just some modified png, and you could make a program to do it in batch with ease.
>>54483350
>Scheme trademark
They trademarked it? What the fuck?
>>54483468
Turns out I was wrong I guess? I have no idea how I came under that impression. Maybe I'm not looking at the right sources.
Anyways it appears they want to distance themselves from Scheme despite me using their api pages as references when writing Chicken code.
I think a little less of them now though because it looks like it's an attempt at establishing a distinct brand. It worked apparently judging by that tripfag's response.
>>54483547
Specifically I remember reading an article explaining the choice of the word "Racket" because the inventor thought the Scheme trademark bullshit was a racket.
>>54483455
I think you've got the wrong person.
>>54483477
Like, create an extended version of jpeg/png/gif to allow a text blob that contains the taglist? That sounds like it'd take a lot more work than you make it seem.
>>54483573
And a Racket is a kind of (criminal) Scheme!
>Tell me what you scrubs are working on
Rape dungeon editor.
>>54483609
is this that lolisim?
>>54483576
I don't think so. Here is how I would structure it.uint8_t image_type
uint32_t image_start_offset
texttexttextext
[from here on you copy wholesale the bytes of the original image]
>>54483609
Why do you write everything in C++, anon. You could write it in lua (with luajit) and save 3x time. Or maybe just use Love2d for the whole thing.
I'm looking to get rid of bottlenecks and I noticed my random number generator spits out unsigned numbers when i only need numbers from the range 0-100, meaning an unsigned char will do.
How would I go about making it faster?
And yes, I already profiled, this one function is the slowest function in my entire program.
>>54483639
>>54483576
Nevermind creating separate format is totally unnecessary, read up on the png file format.
http://libpng.org/pub/png/spec/1.2/PNG-Structure.html
>>54483423
You forgot
Cons:
- Not being able to fly to another country without permission
- Being surveilled as a person knowing sensitive secrets, possibly for your whole life
>>54483663
Post code, and I'll try to help. Also note that integer math is typically faster than char math.
>>54483679
One of those cons is pretty big. Recently some chinks stole the entire FBI database, so my father's entire life story (and obviously credit card information, social security number) is on a computer in China because he had a security clearance 10 years ago. The FBI doesn't even know whether it was the government or some criminal organization, and as a result a ton of tax money was spent setting up fraud protection for people who have and used to have security clearance.
Why does this work:// Return size of array
template <typename T, int S>
int array_size (T (&P)[S])
{
return S;
}
But this doesn't:// Return size of array
template <typename T, int S>
int array_size (T input[S])
{
return S;
}
?
TLDR why do I need to use a pointer when passing arrays
>>54483651
Not really. All writing it in lua would do is introduce more bugs.
>>54483745
The length of an array is unknown at runtime so the computer doesn't know when to stop copying.
>but wouldn't the compiler know its length?
Shared Libraries
>>54482569
3 versionsdef rev1(n):
return str(n)[::-1]
def rev2(n):
ret = 0
while (n):
ret = ret * 10 + n%10
n /= 10
return ret
def rev3(n, ret):
if not n:
return ret
else:
ret = ret * 10 + n%10
return rev3(n/10,ret)
>>54483745
I implore you to reconsider using something like this.
>>54483745
T p[S] decays into a pointer.
>>54483748
In lua >segmentation fault
is impossible, same with buffer overflow and memery errors. Functional dynamic garbage collected language is a boon, anon. Try it!
I have seen your game logic code, it could be made at least 2x shorter with lua.
>>54483796
I'm learning to code to stave off boredom, it's not like the quality matters. That said, if you have a better solution, feel free to share.
>>54483689int reentrant_rand(unsigned *seed)
{
*seed = (0x343FD * *seed + 0x269EC3);
return (*seed >> 16) & 0x7FFF;
}
Elsewhere, it's being called like reentrant_rand(seed) % TBL_SIZE where TBL_SIZE is 100.
>>54483833
I'm pretty sure that in any case where that would work, you'd already know the length of the array.
>>54483816
In your attempts to encourage him to use lua you've left out the biggest flaw. Interfacing previous code to lua is pure boilerplate hell.
You've also left out the biggest boon, which is a lot of code doesn't need to be recompiled so you can save your changes, switch over to another screen and immediately test your shit.
For a big project that would otherwise have a long compilation hierarchy, it's pretty nice. On small projects it is still pretty nice.
>>54483816
lua is worse. instead of a crash when you do stuff with nil, it subtly keeps working with behaviour not what you thought. I prefer statically typed languages with compile-time checking for stuff.
I've worked professionally on a project that used lua and C++. There was significantly more bugs in the lua code for reasons like that.
I use smart pointers, STL, etc so writing C++ isn't really that seg-faulty/buffer-overrun-y either.
>>54481255
There's a fix for this at get.debian.org
>>54483866
>In your attempts to encourage him to use lua you've left out the biggest flaw. Interfacing previous code to lua is pure boilerplate hell.
Let's look at http://luajit.org/ext_ffi.html and see:local ffi = require("ffi")
ffi.cdef[[
int printf(const char *fmt, ...);
]]
ffi.C.printf("Hello %s!", "world")
To me it looks like heaven.
>You've also left out the biggest boon, which is a lot of code doesn't need to be recompiled so you can save your changes, switch over to another screen and immediately test your shit.
This too. I'm just trying to save a talented anon's time. That's all.
>>54483609
>Pediatric gynecology
What the actual, I'm afraid to google that
>>54483876
>conflating static typing with weak typing
I do agree that weak typing is the devil though. Some of the shit that perl and javascript programs do when they run is.... fascinating.
>>54483931
Looks like my information was outdated. I used it some years ago and it was awful boilerplate hell. Is there anything like this in lua now?
>wiki.call-cc.org/eggref/4/bind(bind* "#include \"headers.h\"")
is more heavenly when you're interfacing to 30, 40, 150 functions and globals.
>>54482724
You fucked up your parentheses on the connect line.
I already asked about references/pointers:
54479091
and anon was kind enough to explain:
54479410
But I'm still confused, what it means when reference or a pointer is used in the method signature.
Doesint &number()
{
blah
{
mean it should return a reference to an int? So it returns a copy of whatever int is being returned?
Then doesint *number()
{
blah
{
mean it will return a pointer to an int? So it will just return a "normal" int?
My understanding of pointers and references is just that "&" refers to the address (AE94, for example) whereas "*" is the value of the memory address (so if AE94 was the address, it points to an integer 5, just as an arbitrary example).
>>54484033
What's to dislike about static typing?
>>54484033
Wow this is literally pedo simulator.
>>54483845
For one this isn't even a randomizer, every call is deterministic. And why are you bit shifting and masking? Seems totally unnecessary. If you want to limit your output to a range, use the modulus operator, which you are using already.
Anyways remove that pointer parameter. That's slowing your code down. Make seed into a global and offer a seed_randomizer function.
>>54484055
I meant non-static. Oops. I love static typing 99% of the time.
>>54484069
It's a loli kidnapping and rape simulator. It is not a pedo simulator. Pedophiles are not necessarily the same as child rapists/kidnappers. The vast majority of pedophiles are non-offending. Only something like 80% of child rapists are pedos, even. The rest are doing it for non-sexual reasons for are opportunists. A pedophile simulator would be pretty boring. What would you do? Sit around and get depressed, stigmatized and isolated while jerking off to little girls?
>>54484111
>>>/a really high cliff/
Reminder that there's essentially a spectrum of dynamic typing that is representable in a strong, static type system using (G)ADTs.
>>54484111
What's wrong with dynamic typing? More reusable code and when it's also strong, it's still pretty deterministic and won't be doing evil under your nose unlike perl and javascript.
Also
>only 80% of child rapists are pedos
kek. didn't expect to read that today
>>54484095
it has to be a pointer.
Every thread gets it's own seed because otherwise you have like 8 threads working in sync and producing identical output since they're all reading the identical global rand seed.
>>54483946
Well, Anon, a pediatrician is a doctor that works with children, and a gynecologist is a doctor that works with vaginas. You don't really need to google anything here.
>>54484111
>It's a loli kidnapping and rape simulator. It is not a pedo simulator. Pedophiles are not necessarily the same as child rapists/kidnappers.
>The vast majority of pedophiles are non-offending
I think that might be a valid argument, but that's a pretty tough position to defend when your whole game is based around raping children.
> A pedophile simulator would be pretty boring. What would you do? Sit around and get depressed, stigmatized and isolated while jerking off to little girls?
I think you're inverting things a little here. Lolifaggots are the depressed, hopeless /d/eviants fapping to <age chinese cartoons.
Pedophiles go out and rape children.
Your whole defense seems to be "I'm not evil incarnate, just mildly fucked up", and even then you're having trouble making that point. Nice job.
>>54484159
>More reusable code
This argument goes out the window in any system with parametric polymorphism, and ideally structural typing. Even more so if you can "switch" on the type parameter, e.g. template specialization in C++.
>>54484111
>It's a loli kidnapping and rape simulator
Fuck you anon, I just had that idea.
REEEEEEEEEEEEEE
>>54484159
>dynamic typing? More reusable code
wut
>>54484111
last time i tried compiling this it was horrible.
is it better now.
>>54484167
8 threads? Even more reason to use a global. Here's a marginally rewritten version that should be a lot faster.int seed;
void reseed(int i) {
seed = i;
}
int random() {
seed = (0x343FD * seed + 0x269EC3);
return (seed >> 16) & 0x7FFF;
}
Call reseed in your init function before you create the threads and you're all good. They won't produce identical output because every thread changes the value of seed every-time it is read.
This is still a pretty terrible randomizer though. Multiplying by a magic constant and adding a magic constant is pretty terrible. You should lookup some real randomization techniques.
>>54483609
how did you manage to get the text to scroll slower than the rest of the list UI? Bet there's some pretty gnarly code behind all that.
Is there any software that can simulate a quadcopter? Trying to use reinforcement learning with a physical drone is retarded.
>>54484276
would probably be easy enough to make one with box2D
>>54484197
>I just had that idea
Well he had it months ago and has been working on it since then.
Think of something original
>>54484276
Then your quadcopter will be super good at playing a simulation, and overtraining will cause it to fail at the slightest unexpected circumstance.
No simulation replaces the real world, so good luck getting anything useful out of it.
Tbh that's a pretty retarded use for reinforcement learning overall.
>>54483992
>Is there anything like this in lua now?
Yes, it is called https://github.com/LuaDist/toluapp
>>54484286
i think his drone is 3d
>>54484190
Ah yes I will just pass my List<Hashmap<void *,List<Tuple<Vector<int>,string>>>> to map with it's signature of ...
Ah fuck I lost track of what I was doing.
>>54484343
C++ has type inference now. Dunno if it can infer all that, but if it can't, then you can just template the type out and leave it to duck typing (so, the same as in any dynamic language, just checked at compile time).
>>54484297
Fuck you, it's capitalism bitch. I just have to make it 3D with real cute lolis and keep out any mention of cervical diameter. Like seriously
>>54484370
>I just have to make it 3D with real cute lolis
But you won't because you never actually implement any of the projects you "think up"
>>54484343
>>54484367
Also, languages with good type inference won't have a problem with that (it's likely that they'll infer an even more generic type, so bonus). Without inference, you can always make a type synonym.
>>54484399
You wish :^)
>>54484399
With modern open-source game engines like Urho3D and Godot and oss 4d authoring software it is possible. I can do it, just not interested in it.
>>54484434
Honestly, it's looking like 2 different games. Yours is more Violated Heroin style, while I wanted a Princess Maker 2 but in 3D
>>54484434
I mean 3d authoring software of course.
Blender and Wings3d. Also goxel for voxel art.
>>54484447
Lol I'm not him, I'm not into loli.
I'm much more interested in creating a tamagochi-style game but with much more complex 3d creature that is able to learn and communicate with you.
NEW THREAD!!
>>54484471
>>54484434
>you never actually implement any of the projects you "think up"
>I can do it, just not interested in it
Uh huh
>>54484343
Passing such a monstrosity as a function parameter in a weakly dynamically typed language like Javascript would be even worse, in terms of losing track.
>>54483312
>I think that the biggest problem to happen to C was the syntax choice, because it castrates the whole macro system and makes so much of the syntax feel hacky.
Man, thank you for saying exactly what I feel.
>>54484503
It's a good thing I despise weak typing. Dynamic + Strong for life.
>>54484297
>>54484197
Loli rape sim has been around as a concept that people have been actively talking about/attempting to develop for years. Your ideas aren't original, they never will be, it's your implementation that matters.
>>54484408
I have yet to see a static language that has the power of dynamic typing while not being labyrinthine. Haskell has close to the power but it's type system is oppressive.
>>54484675
how so? Haskell's type system almost guides you torwards the correct solution. as long as you know what you want the final result of something to be and what you're starting with, the type system allows you to find functions to do it for you more easily. for example, if i know how i want to transform the data i can apply a map or something like that, but then if the type doesn't match up i can usually look it up on Hoogle to find a function to get me the rest of the way there. or if i need to write pattern matching cases, the type system tells me when i've missed a pattern before the program is ever run so that i know what's left to add before a solution is complete. well-written Haskell shouldn't be 'oppressed' by the type system, but written with the type system as its guardrails/support.
>>54484768
>its all good i just have to navigate through 40 manual pages to get permission from the compiler to map some data
sounds like the compiler's oppressing you to me
>>54484111
literally kill yourself. actually get help. seriously.
