/dpt/ - Daily Programming Thread

>>56748383
First for c++ digraphs and C trigraphs. Death to standard syntax!

>>56748383
Java is so fucking verbose. Jesus.

I'm making games in C# because every job listing wants C#/.NET skills instead of Java or C++ for some reason

haskell a shit

>>56748426
What framework do you use?

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4th for akari-bbs!

The last 2 threads have been just awful, even for /g/.

>>56748415
as if C# isn't verbose

>>56748478
Who said anything about C#, dumbass?

>>56748481
half the people in the last thread? it's well-known that /dpt/ has a boner for C# while they shit on java as if they're two completely different languages.

>>56748505
Darn you they are so different it takes years to switch, like from american to british english.

Shame on you

>>56748505
They're significantly different, and just because you know one, doesn't mean you'd be any good at the other without a few months or more.

>>56748528
you're right. C# has PascalCase instead of camelCase and the curly braces are positioned differently.

Kill yourself frogposter

>>56748478
Don't know about C# but everything in Java seems to be over engineered.

>>56748426
C# is getting pretty popular in the industry. and it's a comfy language for making games in. pls don't say you're using unity tho

>>56748478
he didn't even say anything about C#. but while we're at it, C#, while definitely verbose, is still less verbose than Java. properties, namespace aliasing, implicitly typed locals ("var"), and expression-bodied members all help cut down on syntax

>>56748586
the unity engine is pretty based tho

>>56748586
Rearranging deckchairs on the Titanic.

No typeclasses.
No higher-kinded types.
No tail call optimization.

>>56748620
That ship has sailed an sunk anon

C# is probably the best language in existence

>>56748606
it works fine for some people's needs, but it's pretty rigid and it runs like absolute shit

>>56748620
jesus, you shift goalposts like a motherfucker. this is your argument now? who cares? Java doesn't have that shit either

>>56748670
>Java doesn't have that shit either
that's the point. they're basically the same language.

>9 posters
quality thread

Why is OpenGL so fucking hard? 1000 lines just to draw a fucking triangle.

>>56748700
Quality vs Quantity

>>56748700
hello, i am the 10th poster

>>56748670
I'm saying that C# is not much less verbose than Java at all. You simply cannot express certain patterns that reduce verbosity in either of them as a result of the limitations of their type systems.

>>56748567
>helicopters and faggots aren't really different
>I mean, I guess one can be used as transportation and the other sucks cocks, but other than that, they're the same!

>>56748707
so far, this thread's quality is pretty bad though

>>56748700
poo in loo

>>56748707
OpenGL is a low-level API (although there are more low level like Vulkan).

>>56748679
>any language that doesn't have these three things is basically the same language
haha holy shit. you're trying so fucking hard dude. i don't know what kind of autism it is you've got but damn

>>56748722
False analogy.

>argue that java and C# are different
>everyone argues against me except for like one anon on my side

>argue that java and C# are similar
>everyone argues against me

>>56748763
Have you forgotten where you are?

(you can always switch to akaribbs[!!])

>>56748763
Everyone's just arguing with everyone at this point.

However, it's pretty hilarious that the "Similar" party is conveniently ignoring a massive amount of differences shown by the "Different" party.

>>56748763

Welcome to /g/; we're full of contrarians.

>>56748780
We think that those differences are small and inconsequential. They simply don't matter when compared to more powerful languages.

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Java does some things better than C#.

C# does some things better than Java.

They have some differences, enough to be significantly different.

They aren't more different than, say, Brainfuck and Javascript.

Is this really worth spending your afternoon on?

>>56748780
Yep like the fact java doesnt have # in name, or they have different tooling. And paradigms are completely different not to mention IDEs?

>responding to Java fags
>responding to C# fags

How is this conversation even still going?

Is everyone involved, or is it just like 3-4 spergs?

>>56748780
Those differences are small and inconsequential.

>>56748707
>>56748734
kek yeah i was about to say "you should try vulkan"

>>56748716
oh boy, more autistic hair-splitting. i listed multiple features of C# that reduce syntactic verbosity compared to Java. keep in mind i didn't even say it was "much less" verbose or something. i literally just said "less". that's just objectively correct

>>56748838
>or is it just like 3-4 spergs?
mostly this

>>56748718

>>56748779
is akari bbs online?

>>56748700
>>56748723
This is what happens when you have a stupid OP image. It attracts all the cancer.

>>56748887
Exactly we didnt have maki or akari...

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python3, can't understand how to unpack a list that contains dicts into a string format and show as many items the list has stored

notice either one shows only the first item

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I don't understand what extend does in java or how it helps me.

Go ahead and mock me cause I probably deserve it.

>>56748887
>>56748905
Now that people have gotten used to it, Hime is generally the best quality threads because it's not frog, and it's not "something else".

I'm working on my shitpost detector so that I can prove the shitpostiness of a thread based on OP image and plot the results.

>>56748915

loli = list([dict({'loli':'the best'}),dict({'lolicon':'saikou'})])
print('{}'.format(*loli))

forgot the code ORZ

>>56748936
Thats genious idea! I'd also like to see time of day graph.
I'd like to contribute haha

>>56748930
Det kan brukes for å skrive en funksjon bare én gang i stedet for å skrive den flere ganger.

>>56748936
>Now that people have gotten used to it, Hime is generally the best quality threads because it's not frog, and it's not "something else".
i think it's more that it deters people like me from entering the thread. sometimes i still do it but other times i'm like "why even" and close the tab.

>>56748930
I'm learning Java too but I think that extends inherits everything that in a in a class and you can add more things.

>>56748961
So you're admitting that Hime turns away chronic shitposters like yourself?

>>56748957
愚かな言語、ばか!

>>56748962
Hvis du vet det ikke må du lese læreboken din igjen.

>>56748976
yes it's no secret that i despise the trap posting

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Would anyone have any use for an automated racial slur generator?

>>56748992
aah you again from 2 threads ago. Probably pol

>>56748992
CTR might be interested

>>56748985
Norsk er det beste språket for å diskutere programmeringsspråk.

>>56749007
Noverški je ruzniji njemacki! Kakvo programiranje
Pričajmo u razlicitim jezicima, tako da se bolje razumijemo jel

>>56748989
I don't speak Norsk.

>>56749040
Norks is best language for programming discussion...

>>56749040
Hvorfor?

>>56749065
Hodor?

>>56749022
For et stygt språk!

>>56748930
It's inheritance if you know anything about OOP

If not, think of a class Pet. A Pet has an "owner" variable and a method "feed()". class Cat extends Pet, meaning a Cat is a Pet, and inherits the properties of Pet (owner, feed()) but then may also have things unique to it (method changeLitterBox()). class Dog extends Pet too, and may have something unique like takeForWalk(). Cat and Dog are both Pets, or in Java terminology, they extend Pet.

>>56749079
Nei.

>>56748885
yes, why shoudn't it?

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>>56748383
working on some stupid esolang ideas, because i'm too lazy to work on something meaningful.

>>56749130
>esolang
A Spanish programming language?

>>56749092
Why do we persist with such analogies when teaching OOP?

>>56749128
Just asking. Link?

>>56749084
Hablar Inglés puta
Im running out of languages i can mangle

>>56749161
Jeg liker ikke å skrive på engelsk.

>>56749152
its more fun

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>>56749152
Why do you teach OOP?

>>56749161
akaribbs.mooo.com

>>56749152
We use analogies to get point across so you dont listen to shit like this (for haskell fags):

If F and G are adjoint functors where F is left adjoint to G than composition GoF is monad.

>>56749186
To make students employable, sadly.

Sure, we could teach them something else and they'd be able to pick up OOP with a couple of weeks of training, but companies don't want to train employees any more, they expect them to spring fully-formed from college. So either we teach them OOP (instead of something more useful, transferable, and reusable) or they lose out to the kids who went to a school that taught OOP instead of theory.

>>56749217
Strawman.

You can teach monads without going into category theory and also without using bad analogies.

>>56749243
he wasn't alone, though

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I'm not really seeing what I did wrong and I don't really understand what the terminal is telling me. I tried to implement the define line in an earlier example instead of the one the book was giving me as sort of an extra practice.

Anybody wanna help me out?

>>56749257
Eh?

>>56749092
OOP belongs in the LOO. All that's necessary is POD inheritance and generic functions.

(defclass pet () (owner))
(defclass cat (pet) ())
(defclass dog (pet) ())

(defmethod feed ((p pet))
  ;; shit
  )
(defmethod change-litter-box ((c cat))
  ;; shit
  )
(defmethod take-for-walk ((d dog))
  ;; shit
  )

>>56749202
It looks nice now, last time i checked it didnt have css. Going through your github now

>>56749295
They were trying to bind your state. The Masketta Monad.

>>56749294
>int 0, 300, 20
That's what the int LOWER, UPPER, STEP statement is converted to.
Learn to preprocessor directives and switch to C programming a modern approach.

>>56749294
What the fuck is that DE

>>56749243
>56749243
South american here...

I'm learning Haskell and I'd like to know if I understand Monads
English isn't my native language so...

Monads are just an abstraction. You want to do composition with impure functions so you have Mx
so the bind function takes:(a -> Ma) -> and (a -> Mb) and returns Mb
but you only use Ma -> (a -> Mb) -> Mb
in the end it's just a way to glue the two functions together and the explanation is hard because is very abstract. am I right?

>>56749295
He tries to force this meme every thread

>>56749331
>South american here...
Aprende un lenguaje que te pueda permitir obtener un empleo, en serio Haskell es un lenguaje meme. Incluso yo tuve dejar de utilizar C y Sepples para poder ser empleable en un futuro.

>>56749294
first message is just a warning

int LOWER, UPPER, STEP

is declaring new variables, but you already assigned values to these names with the

#define

lines. What actually happens with

#define

is that LOWER, UPPER, and STEP are replaced by what you defined these as, so the statement is actually

int 0, 300, 20;/code] which is of course invalid.

>>56749294
turn line number on in g edit. Or just get CodeBlocks.

Here is how i define my constants:
#define PORTNUM 2300
#define BUFSIZE 12000
#define KEYSIZE 16

and shit works.

>>56749294

#define

is a macro. you're telling the preprocessor to replace every LOWER in your .c file with 0.
now

int LOWER

actually becomes int 0, which is not a valid identifier.
in your case you don't actually need line 16.

>>56749328
FUCK, OF COURSE! damn I feel like an idiot. Thanks a lot man. Also, I'd switch but man, all I've done since trying to start learning is switching books and things. I don't really want to switch again. I'll take a look at it though. Thanks again.

>>56749329
DE?

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>>56748992
Go back to pol, we don't need your racism around here. Racism is bannable in this board and any board other than your containment board, stormtard.

>>56749409
>I don't really want to switch again. I'll take a look at it though
I really recommend it, K&R teachs you how to program in C. The other book teachs you how to program. When I read it things started to make sense.

>>56749370
Não acho que C seja o melhor exemplo se você quer falar sobre empregos.

>>56749370
>>56749437
Sorry, Meu espanhol é fraco. Entendi mal, achei que você estava fazendo propaganda do C.

>>56749152
shot in the dark here but probably because it's simple and expresses the concept

>>56749186
>all oop is enterprise-style oop
nice pic you meme loving fuck

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>>56749437
huehuehue

>>56749453
>>all oop is enterprise-style oop
>nice pic you meme loving fuck
I guarantee you don't know what OOP is
All you know is enterprise "OOP"

>>56748415
System.out.fuckmyshitupfam

>>56749434
You know that is a big problem I had for a while. I didn't know what a compiler was or how to do it till I googled it. The book just glossed over that important part.

I'll definitely pick it up then, its not often an anon is adamant about his recommendation.

>>56749457
What kind of sick fuck asks a man to hold up his deformed child and kiss it for a photo op.

You can tell he doesn't fucking want it.

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>>56749457
Quit your racism poltard. Out with you now. Reported for off topic racism.

>>56749331
>Monads are just an abstraction.
Yes.

>You want to do composition with impure functions
Monads are not related to impurity in Haskell.

>so you have Mx
Okay - M is a type constructor.

>so the bind function takes:(a -> Ma) -> and (a -> Mb) and returns Mb
I think you might be confusing bind and return here.

return has type (a -> M a), i.e. for any type a, it will take a value of type a and return you a value of type M a.

bind has type (Ma -> (a -> Mb) -> Mb), i.e. for any types a and b, it will take a value of type Ma, a function of type (a -> Mb), and give you back something of type Mb.

>in the end it's just a way to glue the two functions together
Roughly, yes. It lets you do it without having to 'look inside' M. This is why monads are needed to sequence IO actions in Haskell, because you can't look inside IO.

It's not just useful for IO, though - there are lots of other type constructors that you can use as monads. An example is Option. If you have a series of functions of type (a -> Option b), (b -> Option c), etc. then you can use bind to compose them together. If any of them returns None, then the result will return None.

>and the explanation is hard because is very abstract.
I think you're right. It's a concept that's very alien to someone coming from a language like C or Java. You have to get your head around both typeclasses and higher-kinded types to be able to do something as simple as a program that asks your name and then says hello.

You might wonder why put these things in a typeclass. The real power comes from being able to write functions that work on *any* monad, and yet to extend them to a new type constructor you only need to implement bind and return.

>>56749475
what? that's my line

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>>56749457
>>/pol/ is the direction, retard.

>>56749409
DE = desktop environment

>>56749545
Thank you. My little understanding came from trying some haskell and watching this video.

https://www.youtube.com/watch?v=ZhuHCtR3xq8

>>56749475
>>56749547
did you misunderstand me or do you have it backwards? the people who unironically repost that pic never actually understand oop and think that the retarded clusterfuck enterprise kind of oop it parodies is the only kind of oop

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need a nickname for a programming competition

GO!

>>56749479

public class BrendanFraser {
    public static void main( String[] args) {
        new BrendanFraser().getShit().fuckUp( Shit.Types.JUST);
    }

    private Shit shit;

    public BrendanFraser() {
        setShit( Shit.Types.ALIMONY);
    }

    public Shit getShit() {
        return shit;
    }

    public void setShit( Shit shit) {
        this.shit = shit;
    }

    class Shit {
         enum Types {
             JUST, ALIMONY
         }

         void fuckUp( Shit.Types type) {
             if ( type == Types.JUST ) {
                  System.out.println( "JUST FUCK MY SHIT UP");
             }
         }
    }
}

>>56749662
maki4life

>>56749636

I guarantee you don't know what real OOP is, you only know the modern "OOP" that's used in enterprise, and that's why you're in no position to say this picture is about people who don't know real OOP. Your entire complaint is that they're taking it more seriously then you do.

>>56749662
texasenfuego

>>56749682
>I guarantee you don't know what real OOP is, you only know the modern "OOP" that's used in enterprise, and that's why you're in no position to say this picture is about people who don't know real OOP.

why don't you enlighten me then?

>>56749670
Sorry Sir but no compile.

>>56748818
Actually Java has anonymous classes and lambda expressions, just have a look at their Java docs

>>56749719
Can you email me the solution, Sir?

my email is: [email protected]

Thank you, Sir

>>56749706
What most people call OOP is just C with Classes. Java, C#, C++ are examples of this.
Design patterns, for instance, exist to remedy issues with "OOP" (C with Classes).
Though there are some miscallaneous "design patterns" that are actually just principles and not really patterns.
C with Classes is the basis for "multi-paradigm" languages (again, not really multi-paradigm either).

>>56749615
In a way, monads are a way to avoid repeating yourself. Consider the following code:

newtype Error = Error String

f :: a0 -> Either Error a1
g :: a1 -> Either Error a2
h :: a2 -> Either Error a3

-- without monads
composed :: a0 -> Either Error a3
composed a0 =
  a3
  where a1 = f a0
  where a2 = case a1 of {Left e -> Left e; Right a -> g a}
  where a3 = case a2 of {Left e -> Left e; Right a -> h a} -- have to choose whether to short-circuit or proceed every time

-- with monads
composed :: a0 -> Either Error a3 
composed a0 = (f a0) >>= g >>= h -- bind takes care of choosing whether to short-circuit or proceed

>>56749769
composed = f >=> g >=> h

>>56749801
All in good time. I wanted to stick with the fundamentals for now.

>>56749815
but >=> is LITERALLY the operator for chaining those together

>>56748992
Yes, post source

>>56749826
Yes, but in Haskell, monads are defined in terms of >>= and return. I think it's better to get comfortable with those before branching out into additional combinators.

>>56749854
>=> is far more natural for this situation

>>56748451
4.0.3 apparently

>>56748586
I'm just making 2D games. No 3rd party engine

Remembered i have github repo, went to check it. Of all shit i made over last year i comited only 2 simple command line tools in C. I always used git for local vcs but obviously i never actually pushed those...
Good thing i formatted my drive...

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>>56749768
>C++
>just C with Classes
it's not 1998 anymore.

>>56749861
Yes, let's teach people Kleisli arrows before they're comfortable with bind and return.

>>56749879
What the fuck are you babbling about you stupid fucking frogposter? We're not talking about every single part of C++

>>56749906
Kleisli arrows are simpler than bind

>>56749801
Oh, and with Control.Category imported (and prelude (.) hidden)

composed f g h = runKleisli . Kleisli f . Kleisli g . Kleisli h

>>56749682
uh... are you sure we don't have the same sentiment? i'm saying that, if that image wasn't originally just a joke, as it may well have been given the level of exaggeration, a lot of people seem to take it seriously (as in they interpret the right side of the image as being an accurate depiction of *all* oop, as opposed to just an exaggerated depiction of specifically an enterprise style of shitty oop), despite really knowing little to nothing about oop

>>56749946
So use kleisli when you want to compose monad functions?

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Im almost positive there is somthing wrong with my math order here. Its a program that is supposed
calculate square roots. The answer im supposed to get is rootOne :: 1.00 and rootTwo :: 0.60. This is java btw.

>>56749960
No, we don't.
Actual OOP is dumb as a programming paradigm
"OOP" is dumb and not really OOP <- you are here
Enterprise "OOP" is just "OOP" taken to its rational limits

>>56749978
>>56749835

>>56749987
oh okay never mind you're just retarded

>>56750025
>- >>56749768

>>56749769
so if

f >>= x = f x
what is

(f a0) >>= g = ??

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>>56749978
Is that JCreator?

>>56749865
>I'm just making 2D games. No 3rd party engine
ah, cool. that's the way to go, you'll learn a lot more that way

>>56750049
they aren't the same f, and you should use different names

x >>= f is a better choice of variable names
x is a monadic value (m a), f is a function from a regular value to a monadic value (a -> m b)

(f a) >>= g is just

x >>= g
where x = f a

>>56750065
Its what the make us use..is there a problem?

>>56750067
Will he make a good game and get rich tough?

>>56750049
and f >>= x is not f x

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At what point can I say to people "I'm a programmer," if they ask me what I do?

I can make crappy 2D games in java and android. I'm currently working on my first potentially non-crappy game.

I can't tell at which point I go from sounding like "i'm in anonimous and i'm a l33t hacker," to someone with a respectable understanding.

I don't want to appear jobless to anyone who asks. I want to look as if, despite not currently earning money, I am working on it.

>>56750095
Explain what monads are

>>56750074
>>56750086
so

m x >>= f = f x

?

>>56750146
No

>>56750037
yeah, i saw. you have no idea what you're talking about and your semantics are shitty at that. you clearly don't really know what oop, design patterns, or multi-paradigm mean, but you're obviously satisfied making confident assumptions about them based on cursory knowledge at best. keep it up champ

>>56750107
Despite googling it just now, I still have no idea.

I should just kill myself.

>>56750184
Sure, I don't agree with you, and I'm not talking fondly of your favourite bullshit, so I must be wrong.
Well done anon.

>>56750154
argh attempt no 3.

bind takes monadic value, function from normal value to monadic, applies first monadic value to function and returns new monadic value?

I want to make a program that:
1) I open it with a shortcut.
2) It asks for a youtube link input.
3) I press enter.
4) It reformats it to:
youtube-dl --format "bestvideo+bestaudio/best" [LINK HERE]
5) Then enters that into cmd.

What's the easier programming language to do this in?... please respond

>>56750335
you could do that even in assambler. Any language

>>56750335
>What's the easier programming language to do this in?
Python and I fucking despise this language.

>>56750335
C

>>56750335
its literally this:

int main(){
    string foo;
    cin >>foo;
    system("youtube-dl " + foo);
    return 0;
}

>>56750335

import os
link = raw_input(': ')
#import subprocess
#subprocess.Popen(['youtube-dl', '-f', 'bestformat+bestaudio', link]).wait()

os.system('youtube-dl -f  bestvideo+bestaudio/best %s"%link)

>>56750335
Just write a damn shell script.

#/bin/sh
youtube-dl --format "bestvideo+bestaudio/best" $1

chmod 744 script.sh
run it as ./script.sh [LINK HERE]

>>56750335
I'll begin now the analysis of the performance of reading input and string concatenation in various languages in different paradigms. I will start with the Lisp family and move on to Haskell and see how it goes. I will of course also consider the possibility of creating a domain specific language to tackle the issue.
Please expect my reply this weekend...

Regards,
an expert programmer

>>56750503

$ nano .bashrc
alias whatever='youtube-dl -f best+best'

Can a malicious program harm your computer if you only run make but not make install?

youtube-dl -F url then pick them you'reself.

>>56750641
Yeah, you don't understand how make works. RTFM.

>>56748957
>>56748985
>>56749007
>>56749022
>>56749084
>>56749161
>>56749173
>>56749437
okeilabidavaičau

>>56750641
only if you run $sudo make

>>56750668
>>56750707
Okay, because I want to download some libre programs and compile them in my home folder. I was just wondering what's the worst damage that can be done if it happened to be malicious.

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still can't understand how to unpack a list that contains dicts into a string format and show as many items the list has stored, without doing some ugly function that joins '{ }' into a string for later in python3

>>56750733
If it's open source the likelihood that it's malicious is 0. And if you are that worried, read the source.

>>56750953
What. Explain it better.

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>>56748415
mfw all jobs in the industry ask for java or C# skills... tfw I spent 3 years learning C++ by my own and it didn't worth shit...

anime

Okay i suck at programming and am learning java. How the fuck do I take user inputted numbers and add them to an array? Like what im looking for in Python would be
map (int,raw_input ().split ())

>>56749417
t. mad google

>>56751122

Scanner sc = new Scanner(System.in);
for(int i = 0; i<array.length();i++){
array[i] = sc.nextInt();
}

I think it should be like this

>>56751122
https://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html
https://docs.oracle.com/javase/7/docs/api/java/util/ArrayList.html
https://docs.oracle.com/javase/8/docs/api/java/util/stream/package-summary.html
You can figure it out from there hopefully.

https://soundcloud.com/hyqxyz/monad

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What is the hardest programming language?
Writing a program in which one of them is the highest challange?
If I wanted to impress you with my programming skills, what would it take to program in what language?

>>56751195
https://en.wikipedia.org/wiki/Malbolge

>>56751195
do a chris sawyer and write a game in x86 ASM

>>56750953
How has no one noticed it yet.

>>56750994

loli = list([dict({'loli':'the best'}),dict({'lolicon':'saikou'})])
print('{}'.format(*loli))

>>56751251
That's a myth...

>>56751342
http://www.chrissawyergames.com/faq3.htm
He wouldn't lie about his accomplishments, now would he.

>>56748383
c++ homework, supposed to implement a stack with a linked list and keep track of the minimum int in the stack, need help

>>56751444
undeserved trips, go make your homework yourself.

>>56751452
eat shit fag, everyone starts somewhere, i have the whole stack implemented and working i just can't get the getmin working

>>56751314
That only prints {'loli':'the best'}. If you want it print all the elements of all the dicts joined, then do

print({k:v for k,v in d.items() for d in lolilist})

>>56750953
write a function to do what you want not that i understand what that thing is, just write a function that returns a stirng
like a __str__(self) sort of thing
ignore last part if you have no idea what it is

>>56751245
Maybe the hardest language that has a point to using it? Assembly perhaps?

>>56751479
keep a pointer to the node that containts the least element and update as inserts/deletes happen

after your first insert Node* min_ptr will point at the head

File: yande.re 342098 animal_ears bikini_top bottomless henreader loli tail tan_lines thighhighs.jpg (1MB, 2754x3961px) Image search: [Google]

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>>56751518
ya, exactly what i wanted all the elements thanks.
even tho its giving me d is not defined, i understand now many thanks

>>56750953
Is it a common thing for these pics to go unnoticed in these threads?

It's kinda funny.

>>56751687
you sick fuck stop attention attracting with those retarded picturs, trying to trigger people

>>56751479
you probably should have mentioned that
this happens on stackexchange a lot: i start carefully leading someone down the road toward a solution and then they reply "why are you telling me this i did this part already"

>>56751598
Maybe I'm too far gone, but assembly is easy to understand for me. I can't really understand the high-level procedural languages. Their attempt to mask human logic onto computer logic is awful IMO and unintuitive. I can only program in assembly and functional styles anymore.

>>56750387

link = input("Enter Youtube link:")
cmdline = 'youtube-dl --format "bestaudio+bestvideo/best" '+link
print (cmdline)

How do I get a .py file to enter "cmdline" into cmd in windows?

>>56751696
what are we supposed to do about it?
they don't know shame

>>56751719
1.assembly is human logic
2.high level languages are assembly
3.not judging your choice of language

>>56751668
I've tried to do that but for some reason it only stores the first number pushed into the stack
>>56751700
sorry lad, my issue is in my push and pop functions i know that, just don't know how to implement the checks


void push(int i)
{
Node *temp = new Node(i);
temp->next = top;
top = temp;
}
int pop()
{
if(top !=nullptr)
{
Node *temp = top;
top = top->next;
int d= temp->data;
delete temp;
return d;
}
else
return -1;
}

>>56751773
>for some reason
the reason is you wrote it wrong

that's how you are supposed to do it, try harder

>>56750503
>>56750455
>>56750602
youtube-dl does best by default

For some reason if i call this function from my main, the w and h get passed as 1 instead of whatever default value i put in the declaration.

void drawFilledRect(SDL_Renderer *ren, float x, float y, int w=50, int h=50, bool fixed=false);

What could cause this?
If I call them from another cpp file it works correctly.

>>56751773
i don't see anything relating to the minimum. what did you try?

>>56751842
I took it out, but this is what I have for my push, not sure if I'm on the right track or what
void push(int i)
{
if(top != nullptr)
{
Node *temp = new Node(i);
temp->next = top;
top = temp;
min = top->data;
}
else if(i<min)
{
Node *temp = new Node(i);
min = i;
temp->next = top;
top = temp;
}
}

>>56751907
use fucking code tags boi
this is unreadable.

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>>56751251
I think my record for making a game in x86 asm was 4 hours

Pictured: that game

>>56751977

void push(int i)
{
if(top != nullptr)
{
Node *temp = new Node(i);
temp->next = top;
top = temp;
min = top->data; 
}
else if(i<min)
{
Node *temp = new Node(i);
min = i;
temp->next = top;
top = temp;
}
}

>>56751907
there are issues. let's walk through the logic
if the stack isn't empty, you push i on top and set min=i. say your stack is just a single number 2, so min ought to be 2. then i push on 1 and the stack is 1 -> 2. what should min be now? what does your code actually do?

i only like oppai loli

>>56752036
i fucked up. push 3 on there. i always think about maximizing because i'm a positive person

>>56752036
the code is supposed be a stack that takes some ints and can return the minimum int

>>56752066
this answers neither of my questions anon

Anyone here expert at make/gcc stuff related to Linux kernels? I have this problem:

http://superuser.com/questions/1101134/fedora-24-no-build-include-try-to-generate-autoconf-h

And don't know what to do.

>>56751997
Oh, and actual code snippet just in case you need to speedcode in asm:

    ; reset some stuff
game_reset:
    mov ax,0x2000
    mov es,ax
    
    mov ax,[score]
    mov [lastscore],ax
    mov cx,ENT_COUNT
    mov bx,entities
    lp_rstents:
        mov word [bx+ent_type],0
        add bx,8
        loop lp_rstents
    
    mov word [plr_x], 160-4
    mov word [plr_y], 180-8
    mov word [plr_vy], 0
    mov word [score], 0x0000
    mov byte [keys], 0
    mov byte [ticks], 0

>>56751698
why would it trigger people? it's a well done picture. the artist is very talented.

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I just need to have the program enter the cmdline in cmd now. Any tips? I guess I can't just use the string name.

>>56751835
I found the problem, the bool fixed should go before w and h or else you can't do

drawFilledRect(ren, 0, 0, true);

>>56752186
tkSimpleDialog.

>>56752177
show it to any non-japanophile weeb and they'd tell you it's drawn cp or whatever

>>56752097
anyway my point is that in the example i gave your program will say that when the stack is 3 -> 2 the min is 3. your first block always assumes that i should be the new min and that's definitely not what you want
so include some more logic to decide whether or not min should be replaced
the "else if" confuses me too. you only end up there if the stack is empty and then there's really nothing to test for. it should be clear what to do with top and min in this case

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>>56751518
>>56751687
with this pretty much understood that's it can't be done, gonna have to do it the ugly way

Explain to me the ternary operator. Why or when would i want to use it onstead of a simple if-else?

I've used it a couple of times in school project, just for the xp, but everytime people have gone "what the fuck is that?i have no idea what's going on here". It seems that it only makes code harder to read.

>>56752273
https://stackoverflow.com/questions/38987/how-to-merge-two-python-dictionaries-in-a-single-expression

>>56752284
It's baggage from systems where memory was scarce, so they tried to make statements very succinct.
Nowadays it's still useful, for example where do you want a simple assignation based on a condition, because sometimes clarity is often achieved through brevity.

>>56752284
>the ternary operator
?: is A ternary operator, the conditional expression

As its name implies in languages like C it is an expression, rather than just a statement like if-else, so it can be used in other expressions, for example

a = b ? c : d

you could not do

a = if (b) { c; } else { d; };

in C since if is a statement, not an expression, it would have to be

if (b) {
    a = c;
} else {
    a = d;
}

otherwise, its not really better or worse than an if-else, simply shorter, which can sometimes be a plus, but as you mention can also sometimes be a negative.

>>56752284
Sometimes, you need to conditionally assign a variable.

unsigned i;
if (!found)
     i = strlen(str);
else
     i = found - str;

This is so common that they streamlined conditional assignment.

unsigned i = (!found) ? strlen(str) ? found - str;

is much simpler.

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Do I need any special specs or not to program and compile/debug shit or not? I've got an Atom netbook running Manjaro and this laptop

Is there anything more exciting than watching text scroll by rapidly in the terminal while compiling?

>>56752424
Watching your program work correctly the first time after writing 100+ lines of code with no testing.

>>56752386
Are there other ternary operators?

>>56752410
Depends, how fast do you want it to go?

I've compiled shit on a 266MHz Celeron w/ 128MB of RAM and less disk space than you have RAM and it took probably about 15 seconds to compile a program which used Allegro 4

You'll be fine

Big fan of the Pepe OPs, hope we see more.

>>56752442
I should probably add this was using DJGPP on FreeDOS

For comparison, a raspi1 takes about the same length of time to compile shit

>>56752435
Done that I think at least twice, feels good

My best achievement however was implementing closures in C by generating x86 machine code on the fly and it worked fucking perfectly the first time

>>56752437
Ternary operator is really the wrong term for it, as it describes the operator as having 3 elements.
The ?: "conditional operator" is usually the only ternary operator in the language, so everyone calls it that.

>>56752435
Nah, that's default mode. Watching your program not working after writing 100+ lines with no testing is gutting, though.

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What's VPN should I use famalams?

HideMyAss?

>>56752469
No, you brought that on yourself for not testing.

>>56752437
Not in common usage in programming languages, but more generally in mathematics yes

>>56752482
Sure. Still feels bad man. Especially when you just write boilerplate seters and geters.

>>56752505
Oh I see.
You're just cargo culting.

Hey i'm trying to learn C. I've written this program that asks the user to input an integer, then stores the integer and prints it to the screen.

#include <stdio.h>
#include <stdlib.h>

int main()
{
int num;
printf("Please enter a number: ");
scanf("%d", &num);
printf("You chose the number: %d", num);
return 0;
}

What if I wanted to allow the user to input any number they wanted? such as a negative or decimal. I know I would use a double? Would I just allocate space for a double n and add a "%f" to my scanf? Help please.

Also what supplements do you guys recommend for learning C? My textbook is kinda awful so far and I believe it only gets worse.

>>56752489
>but more generally in mathematics yes
Like?

>>56752518
Oops meant to leave my question outside the code tag

>>56752476
This is /dpt/, not /sqt/ or /fglt/, ask there.

>>56752517
>You're just cargo culting.
What?

>>56752538
No legitimate programming methodology requires the use of setters and getters unless you're writing a library with an unchanging public interface, like an API.

>>56752518
>>56749328

>What if I wanted to allow the user to input any number they wanted?
You would probably wanna read the string, and use several functions to determine if the string is a int, or a float.

>>56752564
can you show me an example sensei. I know what you mean about creating functions to check, I'm just not sure how to go about it exactly

>>56752564
Why not just read a float instead of an int?

>>56752557
But that's what they told us to do in school.

>>56752623
Don't fall for the OOP meme.

would any of you be interested in reading some math-heavy but otherwise friendly articles on machine learning aka meme science?
i'm trying to figure out if there's anything interesting. the notes are mostly for a friend but it would be fun to get more eyes on it

>>56752521
it's not clear to me what the exact definition of ternary should be. i think the thing that makes sense is "function with three arguments". that makes it seem completely dull, which it is
i wrote down M_{g,n}(X) a lot today. g and n are nonnegative integers and X is a geometric object. i need all three of those inputs

>>56752601
I haven't programmed C in like two years, but you can do this:
>Read the string
>if the first character is the "-" then is a negative number
>if all the next characters aren't letters (aka doesn't contains a point) and are valid digits then it's a int (check for overflows)
>if all the next characters aren't letters but contains a point character then it's a float.
You can work with that I guess, maybe there's a formatter string to do this but I can't remember.
>>56752607
Because the scanf will read the buffer? Leaving nothing left to read?

>>56752623
You're a victim of the "college as job training" school of thought.
Enterprise now dictates what is taught in programming classes since no company is willing to train people anymore.
If some shitty paradigm like OOP becomes popular, classes will teach it, even if they have no time to teach the theory and fundamentals that would otherwise be required to understand OOP.
This is why you have tons of graduates who literally CANNOT COUNT DOWN FROM 700 in a FOR LOOP because it wasn't explicitly taught to them in a formal class.

Search falcon's trip if you don't believe me.

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>>56752536
No, I don't like those generals.

Thanks for the suggestion though.

Again, lads. What VPN should I use?

>>56752654
But that's not really an operator, is it?

>>56752518
>>56752564
>>56752601
>>56752658
You do know that scanf's %d will automatically accept - signs?
If you want decimal points, use %f and a double argument.

>>56752635
It's a little late. I've already been indoctrinated.

>>56752709
>use %f and a double argument
Small correction, after looking at the man page:
%f for float.
%lf for double.

>>56752690

Operators really just represent functions (in the mathematical sense).

>>56752690
i don't see it as a meaningful distinction i guess. it's all just syntax
what about tensors, then? u,v,w vectors form u (x) v (x) w

>>56752690
You can view everything in programming (including and especially operators) as functions.

>>56752666
I got a lot of travel agencies.

what do you listen to while programming

https://youtu.be/Qpoy9iIi5ok

Does this look okay for putting in a CMakeLists.txt?

if (WIN32)
    # We are cross compiling
    if (UNIX)
        set(UNIX FALSE)
        set(CMAKE_SYSTEM_NAME Windows)
        set(CMAKE_FIND_ROOT_PATH /usr/x86_64-w64-mingw32)
        set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
        set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
        set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
    endif()

    # Ensure that if we are compiling on Windows, that it is quite clear
    # that MSVC will NOT be used
    set(MSVC FALSE)
    set(MINGW TRUE)

    set(CMAKE_C_COMPILER x86_64-w64-mingw32-gcc)
    set(CMAKE_CXX_COMPILER x86_64-w64-mingw32-g++)
    set(CMAKE_RC_COMPILER x86_64-w64-mingw32-windres)
endif()

>>56752748
I expected too much from the average user of /g/.
https://rbt.asia/g/thread/S56718622

>>56752779
https://www.youtube.com/watch?v=KbNXnxwMOqU

>>56752669
I use BTGuard.

>>56752792

Looks fine. What's supposed to be wrong with it?

>>56752669
why do you need one

>>56752796
https://rbt.asia/g/thread/S56718622#p56721877

Falcon talks about how he found a dev with 4 years experience who couldn't count down from 700 with a loop.

>>56752779
kpop
macross soundtrack
nightcore youtube videos with lots of anime boobs

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>>56752816
>kpop
based

>>56752844

Too damn cute and purdy I want a blowjob from her, dem purdy lips

>>56752844
lately im more into the macross soundtrack tbch

https://www.youtube.com/watch?v=5mzsD2rfR94

>>56752844
Why do so many kpop girls put stick-on gemstones under their eyelids?
It makes them look like extraterrestrial creeps.
Also it looks uncomfortable as fuck.

>>56752874
they dont the makeup artists employed by their agency do it

>>56752810

Not sure. I'm new to CMake, so I'm trying to make sure I'm not getting any bad practices in. Some guides I've read suggest not manually setting the CMAKE_C_COMPILER variables, and instead relying on the CC variable in your shell, but the problem is that on Windows, that variable does not exist! So if I were compiling from a Windows host to a Windows target, the result would be... gross.

>>56752950

What are you actually working on, anyway?

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>give up on my homework assignment 2 days ago after hitting a brick wall 75% through
>the instructions look like jibberish, i can understand the words but they make no sense
>come back today
>makes perfect sense

>>56752813
After seeing this:

https://www.reddit.com/r/unitedkingdom/comments/53y1wi/a_redditor_was_arrested_and_fined_for_an/

I thought I'd start using a VPN to be safe.

What's wrong with this? I started java today

public class Mileage
{
     public static void main (String args[])
     {
          Scanner scan = new Scanner(System.in);
     //Stating that the program will calculate gas mileage
          System.out.println("This program will calculate gas mileage.");
     //Asks the user for how many miles they drive
          System.out.println("How many miles were driven? Enter only numbers.");
     //Declaring miles as a variable and assigning it to the next int inputted
          int miles = scan.nextInt();
     //Telling the user the miles they drove
          System.out.println("You drive " + miles + " miles.");
     //Getting the gas price
          System.out.println("And how much per gallon is gas? Enter only numbers.");
     //Declaring gas as a variable and assigning it to the next float inputted
          float gas = scan.nextFloat();
     //Telling the user the gas price they inputted
          System.out.println("You pay " + gas + " per gallon for gas.");
     //Dividing miles drove by the price of gas to get their miles per gallon
          float mileage = (miles / gas);
     //Telling the user their miles per gallon
          System.out.println("You get " + mileage + " miles per gallon.");   
     }

>>56753109

Britbongs are so cucked.

Is it worth writing a complex makefile to conditionally recompile object files?

Would using the $^ $< macros be portable in any version of make?

>>56752343
don't think u understood, but it's ok thanks for trying to help

>>56753023

Nothing right now. Just learning CMake for the hell of it, and wanting to see if I can make a universal CMake file for most of my uses.

>>56753151
need to

import java.util.Scanner;

at the top to make Scanner visible.

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I want to make something to help me organize my doujinshi and lewds folder. Any suggestion?

>>56753171
Nah we voted for Brexit and the majority of us support free speech, parliamentary democracy is a pain in the arse tbqh.

>>56753151

Your comments provide redundant information.

>>56753179
>Is it worth writing a complex makefile to conditionally recompile object files?
Unless you have millions of lines of templated C++ code, not really.
Code up to a couple tens of thousands of lines should be instant builds even if you do full rebuilds every time, trying to use some fancy build system is just likely to slow that down if anything.

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Now all I have to do is make a .bat program that opens my .py program as a desktop shortcut.

That's going to be easy right?... right? )': [spoiler]how do you guys do this all day?[/spoiler]

>>56753151

you are dividing a float into an int. use a double instead of a float.

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>>56753245

You just need to get your guns back, and you'll be all set.

Nigel Farage is one of my heroes.

>>56753255
how about making just a bat

set /p LINK=
youtube-dl --format "bestvideo+bestaudio/best" %LINK%

>>56753267
disregard this comment. it works, just add the import.

>work on a project for a few months
>finally finish the toughest parts and get everything working perfectly
>only the gui left to implement
>lose all motivation

fuck

>>56753337
Guide programming is fucking boring. Always do that first.

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>>56753329
I don't know why yours worked but the other's didn't.

I love you.

>>56753385
i believe u forgot --format or -f before the "bestvideo+bestaudio/best" with the ones that didn't work

>about to make a pull request
>check recent commits
>pony avatar
folder deleted, repo unstarred

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When does a binary tree become more efficient than a switch case? I am dumb and can't into computational complexity.

>>56753417
You're doing God's work anon
I hope you do the same to frogs

>>56753426
>Comparing a data structure with a programming statement
What?

>>56753426
If you mean a C switch, then it doesn't, ever.
A c switch can be compiled to a jump table which is O(1), and a single pointer dereference meaning the time constant is even lower than for a binary tree to do one jump.

>>56753426
but of course >>56753448 is completely unfeasible in many situations for many reasons

I have a quick question guys, what does this mean?

 for (--index; index >= 0; --index ) 

I am asking on the first part[the part where the loop starts(--index)]. Does that mean that the loop starts at the end of "index"? Never seen a for loop start like that, so I am a bit confused.

>>56753504
--index means index = index - 1

>>56753504
It just means the first thing you do when entering the loop is decrementing index.

>>56753504

for (initialization; termination; increment) {
    statement(s)
}

The initialization expression initializes the loop; it's executed once, as the loop begins.

When the termination expression evaluates to false, the loop terminates.

The increment expression is invoked after each iteration through the loop; it is perfectly acceptable for this expression to increment or decrement a value.

>>56753448
Thanks, it's for a morse code encoder so I'm not sure which will be better.

>>56753634
Use an array

>>56753504
Pre-steps index once before the loop starts because I'm guessing index is currently at 'one-past-the-end' (like an array of length 10, and index is 10 currently but 9 is of course the last valid index so you need to set it to 9 if you're gonna access array[index] in the loop).

new
>>56753671

>>56752186
google python subproccess

>>56753528
>>56753542
>>56753546
>>56753634
>>56753652
Thanks anons, now I truly understand the program. I wish one day to be as good of a programmer as you guys.

>>56748858
>71 posters
>324 posts

I think so