/dpt/ - Daily Programming Thread

>>58448304
First for D

>>58448304
hi anons, i have a game server on python, im currently passing it to ctypes cause slow

but

i just figured, is linux faster than python? ( i think not cause ram) i mean, say instead of loading a bunch of classes and shit i just created temporary folders with data in it and used C programs to asses shit like "can USER move there?" "can USER attack there?" "how much DAMAGE did it make" etc?

would it be faster? like, operating in linux instead of operating withing python?

Or am i just being retarded?

(pls just answer even if its to call me a retard, don't make fun of me)

>>58448345
Operating with data files on the filesystem is going to be a lot slower than operating with classes etc loaded into memory whether you do it in python or in a shell script (which is what I assume you mean by operating in linux)

>>58448374
thank you a lot for giving me a straight answer and not an anime face, ask me for anythnig and i shall deliver

I'm a complete noob to C++, but can someone optimize or shorten this for me? Just want to see how short you can make a program and still make it run with C++.

// typecast.cpp -- forcing type changes
#include "stdafx.h"
#include "math.h"
#include <iostream>
#include <iomanip>


int main()
{
using namespace std;
cout << "Enter the latitude in degrees, minutes and seconds";
int degrees;
int minutes;
int seconds;
cout << "First enter the degrees:";
cin >> degrees;
cout << "Next Enter the minute of the arc:";
cin >> minutes;
cout << "Finally. enter the seconds of arc:";
cin >> seconds;
const float conversionRatio = 60;
float decimalDegrees;
float decimalMinutes;
float decimalSeconds;
decimalSeconds = seconds / conversionRatio;
decimalMinutes = (decimalSeconds + minutes) / 60;
decimalDegrees = decimalMinutes + degrees;

cout << decimalDegrees;






cin.get();
cin.get();
return 0;
}

>>58448415
you're not gonna make it bruh

>>58448415
not C++ wizard, but input a string, split by "," and do the math in a single line

wont be faster but will look shorter

Is this messy code?

if ((time = (!i) ? sec % lmt[0] : sec % lmt[i] / lmt[i - 1]) || 
            (!i && !iters))

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Fucking shit AMD and their shitty drivers.
I was getting massive screen tearings on my app and I tried everything to fix it. After much work I found out that were AMD drivers that were causing the fucking tearing.

>>58448472
Anything with a tertiary operator is messy code, in my opinion.

>>58448529
*ternary

>>58448423
>>58448445
is this better?

#include "stdafx.h"
#include "math.h"
#include <iostream>

int main()
{
    using namespace std;
    cout << "Enter the latitude in degrees, minutes and seconds\n";
    int degrees, minutes, seconds;
    cout << "First enter the degrees:";
    cin >> degrees;
    cout << "Next Enter the minute of the arc:";
    cin >> minutes;
    cout << "Finally. enter the seconds of arc:";
    cin >> seconds;
    const float r = 60; // Conversion Ratio
    cout << (seconds / r + minutes) / r + degrees;
    cin.get();
    cin.get();
    return 0;
}

best programming language for programming?

>>58448557
Ebin overflows senpai

>>58448557
this program is not feasible in the real world, try again

>>58448557

1. Remove stdafx.h. It's not portable.
2. Remove unnecessary calls to cin.get(); You aren't using the value from them. It just unnecessarily stalls the program when the ideal behavior is to return as quickly as possible to the shell that called it.

>>58448616
Like your waifu, the one language you cherish and love.

Why isn't my makefile recognizing the pkg-config bit?

main : main.cpp
    g++ main.cpp $(pkg-config --cflags --libs sdl2) -o output

As written, the g++ line works fine in the command line, but in a makefile it reads as

g++ main.cpp -o output

What exactly does the $( ... ) do? Other time I saw it, it was for noting a variable OBJS = main.cpp and $(OBJS) at the target.

>>58448650
And this is how the man details using it in a Makefile:

program: program.c
            cc program.c $(pkg-config --cflags --libs gnomeui)

>>58448650

$() is variable expansion in Make. I think you need to use the shell function?

https://www.gnu.org/software/make/manual/html_node/Shell-Function.html

gimme a simple example of the benefits of pointers in C

>>58448650
Try

$(shell pkg-config --cflags --libs sdl2)

instead for command subtitution. Also, it may be possible pkg-config returns nothing if the package is not installed.

>>58448687
What does this even mean?

>>58448630
teach me senpai, i'm doing questions out of c++ primer plus 6th edition.

is this better, or does it still overflow?

#include "stdafx.h"
#include <iostream>

int main()
{
    using namespace std;
    cout << "Enter the latitude in degrees, minutes and seconds\n";
    float degrees, minutes, seconds;
    cout << "First enter the degrees:";
    cin >> degrees;
    cout << "Next Enter the minute of the arc:";
    cin >> minutes;
    cout << "Finally. enter the seconds of arc:";
    cin >> seconds;
    const short r = 60; // Conversion Ratio
    cout << (seconds / r + minutes) / r + degrees;
    cin.get();
    cin.get();
    return 0;
}

>>58448635
Because of overflows?

>>58448646
1. I can't compile in visual basic without it for some reason, can you offer any suggestions to why that is?

2. cin.get(); stops program from closing after it has finished it's calculations.

>>58448690
>>58448685
Adding shell did it, thanks.

Why doesn't the manual show that though?

>>58448687
The benefits of pointers in C are strictly speaking the same as the benefits of indirection in programmation in general. That is, you don't have to depend on fixed addresses to write algorithms, your algorithms work wherever its inputs are located in memory.

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>>58448690

Fuck I hate everything about pkg-config and it's related autotools.

>>58448724
>Why doesn't the manual show that though?
If by manual, you mean "man make", it is the manual of the make program, but not of the Makefile specification.

>>58448703
Most arithmetic has the risk of overflow unless you sanitize the valid range of your variables. Also cin isn't safe from overflows either, so even the input can be read wrong.

>>58448746
no, I meant man pkg-config from here
>>58448666
That's the example of how to put pkg-config into a makefile given by the pkg-config manual.

https://is.4chan.org/g/1484199873139.jpg
https://is2.4chan.org/g/1484201701201.webm

>>58448703

>compile in visual basic
You mean Visual Studio? Also, I'm pretty sure there's a flag somewhere buried under mountains of graphical interface to turn on or off precompiled headers, which is what you need stdafx.h for.

>cin.get(); stops program from closing after it has finished it's calculations.
No, Anon, you don't get it. The program is supposed to stop. And when it stops, the command line that you called it from resumes control. If you did not call it from a command line, you are running it wrong. Console applications by definition are intended to be run within the context of a console. But nonetheless, since you are using Visual Studio... "start without debugging". And then get your ass a real compiler.

>>58448779
nice slowdown senpai.
Why are you making a gif-viewer in 2016+1?
Can you scroll the dir with keys?

>>58448748
okay, so how would I make sure it couldn't overflow? I haven't learnt if statements yet but would I use an if statement to end the program or display a message if data not in the range of it's intended variable is entered?

>>58448786
oh okay, sorry senpai, what do you recommend I use instead of visual studio?

>>58448810
More or less, except for getting the input from the user. There are functions that handle it, you can put it in your list of things to look into when you finish your book or whatever.

>>58448826

MinGW-w64, which is a proper port of GCC to Windows. What you learn from using it will translate seamlessly to every other platform. For your editor, use whatever you like. Notepad++ is a common choice for Windows users who don't want to learn anything new

>>58448786
>"start without debugging"
why? learning gdb as early on as possible is a blessing.

>>58448803
>Can you scroll the dir with keys
yes if you right click and select the option to slideshow with arrows

>>58448415

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

#define RATIO 60

static long str_to_long(const char *str)
{
    char *end;

    errno = 0;
    long ret = strtol(str, &end, 10);

    if (errno == ERANGE) {
        fprintf(stderr ,"%sflow for '%s'\n",
                ret == LONG_MAX ? "Over" : "Under", str);
        exit(1);
    }

    if (end == str || *end != '\0') {
        fprintf(stderr, "Invalid number '%s'\n", str);
        exit(1);
    }

    return ret;
}

int main(int argc, char *argv[])
{
    if (argc != 4) {
        fprintf(stderr, "usage: %s <degrees> <minutes> <seconds>\n", argv[0]);
        return 1;
    }

    long degrees = str_to_long(argv[1]);
    long minutes = str_to_long(argv[2]);
    long seconds = str_to_long(argv[3]);

    seconds /= RATIO;
    if (seconds > LONG_MAX - minutes)
        goto overflow;

    long tmp = seconds + minutes;

    tmp /= RATIO;
    if (tmp > LONG_MAX - degrees)
        goto overflow;

    printf("%ld\n", tmp + degrees);

    return 0;

overflow:
    fprintf(stderr, "Calculation overflowed\n");
    return 1;
}

friendly reminder that the only way to really understand programming is to manufacture a computer from scratch

>>58448938
I've written a simple microprocessor (to run on an FPGA) in Verilog before, as part of a university assignment.
Does that count?

>>58448943
no you have to mine your own silicone ore

>>58448830
I will do, hopefully the book touches on it later anyway.

>>58448862
Thanks, would it better for me to download a Linux kernel like arch instead?

>>58448912
thanks, I can't understand most of that lol

>>58448938
maybe not the only one, but surely one of the quickest ways

>>58448866

It's a Visual Studio thing to keep the output window from destroying itself.

>>58448963
>silicone ore

...rocks?

>>58448963
But the paper mentioned how all of that shit is done.
Silicon doping, transistor logic, and all that.

>>58448973

Programming on Linux is less of a pain in the ass as on Windows, but it isn't wholly necessary. There's not too much difference between using GCC on Windows and using GCC on Linux (though any other supporting tools on Windows will make you want to tear your hair out). If you would nonetheless like to work in Linux, I would recommend using an easier distro than Arch. Ubuntu, OpenSuSE, Fedora, Mint... these all work rather fine for beginners and have excellent package managers for getting the tools that you need. It is even possible to develop Windows applications on Linux by getting the MinGW-w64 cross compiler. Testing is as simple as running Wine on the application. Though not every Windows application works perfectly in Wine, almost every application that works in Wine works on Windows... with a few odd exceptions of some really old applications that no longer work in compatibility mode on Windows.

>>58448963
>silicone
Fucking idiot. We aren't making fake tits here.

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>got hired
>got to work with Plone and shit
>currently being fired
>got to explain the system to newbie
>mfw I have no clue how that shit works
It seems I'm just a shit programmer, then.

>>58449054

With all of the traps lurking around here... we might as well.

>>58449086
>all of the traps
There would be 2 on here at most. They are just very vocal.
I wish they would shut up and stop pushing their stupid forced meme, like they have been for the last several years.

>>58449086
>>58449106
Can they actually program though?

>>58449134
Probably not.

>>58449106

Kinda wonder why they come here of all places to attention whore... and why they don't put on a fucking trip.

>>58448729
Can you give an example piece of code?

>>58448687

1. Allocate buffers of arbitrary amounts of memory without the possibility of stack overflow or trashing a register to keep track of the length of a variable length array.

2. Outputting variables from a function while also returning a status code (pass variable as pointer argument, set it from the function).

3. Passing large data structures around without copying memory.

4. Any linked data structure (trees, graphs, linked lists).

5. Anything involving strings.

>>58449194
Any non-trivial piece of C code will use pointers extensively.
They are absolutely fundamental to the way C works.

It's kind of hard to come up with an example, because I could post practically anything.
Here is the most trivial example I can think of:

int n;
scanf("%d", &n);

scanf couldn't work unless you give it a pointer to an existing memory location.

>>58449194
this do?

int a[3];
for(int i=0; i<3; i++){
  a[i] = 10*i+3;
  }

It's an array, but pointers are more or less the same, except they can point anywhere

>>58449281
I get that, I mean &n obviously means "into the memory address of n"
What I'm confused about are variables that begin with *

>>58448687
Mostly pointer math. Just look up linked list double pointers.

It's also used to easily break the type system since any type of pointer can be cast to any type. That way you can easily write your own allocators.

It's what they did for the curiosity rover navigation system since it doesn't have any memory protection or virtual addresses.

They allocated a pool of memory and used placement new.

>>58449312

"the memory address of n" is of type int*.

>>58449312
Think about it from the function's perspective:

#include <stdio.h>

void set_int(int *ptr)
{
    *ptr = 2;
}

int main()
{
    int n = 10;
    printf("%d\n", n);

    set_int(&n);
    printf("%d\n", n);
}

It allows you to modify local variables in other functions.

In my examples, 'ptr' refers to the pointer itself, and '*ptr' refers to the value that the pointer is pointing at.

>>58449343
this makes much sense, thanks

>>58448687
having pointers to functions and using them as callbacks is a neat thing too

>>58448912
why static/heap memory tho?

>>58449363
>static
The function has no external linkage, so it should be declared as static.
For a trivial program, it's not really important though.
>heap memory
My program didn't make use of the heap.

>>58448912

A while ago, I found myself regularly having a section of code where I would fprintf some error message at stdout, and then exit with a failure status. Easiest to condense it into one function. It's a little cleaner than a goto fail kinda thing.

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

/* Exit program with error message */
noreturn void bail(const char *fmt, ...)
{
    va_list args;

    va_start(args, fmt);
    fprintf(stderr, fmt, args);
    va_end(args);
    abort();
}

>>58449533
Could you please stop tripfagging, bro?

>>58449549

No thank you.

>>58448943
u go to uoft?

>>58449564
No.

>>58449533
Yes, 'die' functions are nice and all, but I couldn't be bothered with that for my example.
I can't wait until C2X and getting __VA_OPT__ (assuming it gets through, but it's likely), making these sorts of functions much nicer to use.

how many programs do you have to write to become a programmer

>>58449677
Technically, one.

>>58448963
>silicone ore

>>58448963
>silicone
>not graphite

What lang + framework to use to develop mobile applications?
I know python and kivy but afraid of the performance.
I know java and javafx but it has poor performance. you can't style stuff easily in java and basically the documents say you should write css and then apply the css class for your objects which is fucking retarded IMO.
I could go with web apps but I could as well just kill myself now.

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(C and NOT A) or (B and NOT A)

Can this be shortened? My brain has shut down for the night.

>>58449772
(c or b) and a

>>58449772
¬A ^ (B ∨ C)

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>>58449779
>>58449789
Yes that worked thanks.

suppose i am to implement list that keep its elements sorted
what sorting algorithm is best for this? everytime an element is added to the list, i should run this sorting algorith,

>>58449813
If it's a list of n elements and it's already ordered, inserting in order should be O(n) at worst, no need to sort the list again after insertion.

>>58449813
Does it have to be a linked list? It's extremely easy to keep a binary tree sorted as you go.
>everytime an element is added to the list, i should run this sorting algorith,
You don't even need a sophisticated sorting algorithm for this. You just need to do a linear search through the list, and then insert the element at the correct place.
Unfortunately for a linked list, there isn't really a more efficient way to do this, unless you're trying to do it all up front.

>>58449836
>>58449841
This is actually for a wrapper class. It can be backed by array or linked list.
Isn't insertion sort too slow for this? I'm thinking something like how binary search looks for elements. Check middle, if less than, check left, etc etc.. until the insertion point is found.

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>take a bunch of programming courses in school
>proudest achievement was a working version of pong
>drop out for a year
>don't write any code during that time
>don't remember the exact syntax involved to write hello world anymore in java
>remember after a few hours of failure and despair everything is a fucking class andI've been trying to do it like I would in C this whole time
this language is stupid

>>58449859
>I'm thinking something like how binary search looks for elements
You can't binary search a linked list, because you don't have random access.

>>58449859
me again, of course for linked list, i have no choice but to crawl from index 0 until the insertion point is found

>>58449739
>Graphite
>Not titanium trisulfide

I have a Java job interview in two hours.

What buzzwords should I drop? Already prepared Spring, Maven and Hibernate.

>>58450042

design patterns

model-view-controller

service-oriented-architecture

WSDL
Java 8

Lambdas

Streams

>>58450042
I'd rather become a beggar than work as a java programmer.

>>58450070

Thx

>>58450073

Stay a Haskell NEET then

I just wrote my first simple program in c++ and I feel like I'm on top of the world.

Must read programming books for beginners?
Thanks /g/

>>58450168
>reading programming books

>>58450042
The functional stuff in Java 8 is pretty good.
Mention how you can now do method chaining without getting fucked over by nulls due to monads (Optional<T> being the main hero here), which lets you write much better looking and easy to understand code.

That at least makes you sound like you have an interest in the development Java goes in.

It's like Oracle wants a language with the flexibility of Common Lisp and the type safety of Haskell. They just don't care enough to get it done.

>>58450187
>not just watching YouTube programming tutorials

>>58450207
But they are almost always utter shit, done by clueless 14-year olds and/or indians.

>>58450216
sounds like your mom

>>58450216
>tfw trying to solve a problem
>in desperation try the jewtube
>open a seemingly relevant video
>hear an indian accent
>ctrl+f4
>the search continues
everytime

>>58450276

I know this feel
Fuck Indians

>>58450299
>>58450276
Ive seen vids by indians that were helpful

stop being so buttblasted, not everything's about race

>>58450323
>can't attend real analysis classes because aids
>Indian guy on yt teaches me real analysis

epic nice, thanks pajeet

>>58450323
I saw a video by a 10 year old indian kid on connecting ESCs to a raspberry pi (including soldering connectors for the battery) which was immensely useful to me.

>>58450340
There's a strong possibility that you might be mentally retarded then.

>>58450350
And why exactly? I don't remember the exact problem I had but I remember that no other video had the information I was looking for. Don't act as though you never look up info on the internet...

>>58450369
You just confirmed it, you're definitely mentally retarded.

>>58450323
It's more about their accents being annoying as fuck.

>>58450385
>no arguments, just insults
ok pajeet

>>58450323

It isn't about race. Its about the fact that I'm not a native English speaker, and Indians have very hard to understand accents.

Where do I get compilers for Android phone?

what would one use to write simple CLI applications with one purpose to work on both windows, mac an linux? not including python

>>58450532
C

>>58450532
Rust

>>58450559
>needs to write simple CLI application
>this retard suggests language that would require me to learn everything about transpeople and feminism before I'm even allowed to use the compiler

>>58449755
QT

>>58450532
Perl

>>58450483
Depends on language.

>>58450532
Go

>>58450532
Node.js

>>58450532
Java

>>58450532
bash*, C(++) w/ stdlib

>>58450532
assembly

>>58450532
Haskell

>>58450593
>low hanging fruit 'it's SJW GUISE' pseudo-criticism
>thinks his opinion is valid

>>58450665
>C(++)
C and C++ are completely different languages. Grouping them together makes no sense.

For C which utility library should be used?
glib, apr, qlibc, tbox, libu?

>>58450769

C(#)

>>58450848
triggered

>>58448557

constexpr float ratio = 60;

int get(const string &prompt) {
    int ret = 0;
    cin >> ret;
    return ret;
}

int main(int, const char **)
{
    int deg = get("first enter the degrees:");
    int min = get("next enter the minute of the arc:");
    int sec = get("finally enter the seconds of the arc:");

    cout << (seconds / ratio + minutes) / ratio + degrees;

    cin.get();
    cin.get();

    return 0;
}

>>58450824
WinApi

>>58450693
It totally fucking is.
The reason I don't like using JS isn't the language itself, it's the community.

Look at PHP. It too has a shitty community. Had the community been less 34 year old retards who happened to figure out how to write webpages during the dotcom boom and never bothered to learn what an array was, PHP would have been a tolerable language by now.

If you use a language youre joining a community, even if you're joining a community of one because all the others are intolerable.

>>58450932
>muh group identity/community
sjw language there

>>58450915
you're not printing prompt
use atoi or one of its cousins

>>58450943
t. communist

>identity and groups don't matter! blend everything together!

>>58450932
I use 10 languages (obv not carmack tier in any (yet :3)) and I havent joined no community

>>58450932
>building an identity out of the tools you use

absolutely haram

>>58450932
Who gives a fuck about community? They already wrote libs for you, answered questions for you. All perfectly googleable, so why get yourself involved any further?

>>58450957
collectivist

>>58450623
Any

>>58450973
If you don't believe in your race, in your culture and in your people then what good are you?

>>58450977
https://golang.org/dl/

>>58450532
Java, not even kidding

>>58451004
>instantly jumps to race
alt-sjw

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>>58451004
>giving a shit about a group of people connected by some arbitrary characteristic just because you also exhibit that characteristic
>believing (strongly) that you owe them your life

>>58451005
Ther is no .apk

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>>58445049
>>58445064
>>58445106 (Me)
>>58445146

No, it's completely okay, fagtron.

>>58450532
C#

>>58451034
>>58451024
Your culture and your race made you who you are, they define a huge part of you

>>58451047
Y-You want to compile on Android itself? Nobody does that, because it's terribly slow. Read up on cross-compiling.

>>58451053
In no way does it make me obliged to do anything for other people of the same race and/or culture just because they happened to be born into it (or vice versa).

>>58451064
You didn't HAPPEN to be born into it.
You couldn't have been born in a different culture or race.

>>58451053
>my race
not really

>>58450943
The community and their intelligence or lack thereof influence how good the docs are, what features are coming, how the language is evolving, and so on.

Languages change and the people that use them change them.

When slave/master becomes leader/follower, it's just a prank bro. But what the fuck makes you think it will stop there?

I'm not saying that Rust is going to become C+=, but it'm not saying it won't either.

>>58451063
I want some programming environment to have some fun.
I've been thinking about setting up C64 emulator, though.
Let's say, I want to set up Python on Android.
How is that possible?

>>58451047
Use your Android device as a terminal and RDP into a proper machine with IDE/compiler/etc.

>>58451072
Yes, I did happen to be born into it, I didn't choose it.
And I still wouldn't owe anything to them or any other culture or race.

>>58451096
too dependent from network connection
I don't want any serious things.

>>58451081
>libruls cant be smart
What's an alt-right langauge I can use. For the maximum amount of intelligence.

>>58451094
It's not.

>>58451100
>I didn't choose it
It chose who you would be.
Any other culture could not have made you.

>>58451115
It's kind of useless to speculate on that. If I were born into a different culture I'd be a different person, but I weren't, so I'm not.

>>58451132
>If I were born into a different culture I'd be a different person
Exactly.

I've slightly tweaked my code, but it still won't work. Any idea what's wrong?
It should return all the pairs of words with guess being a BASE-n rotation of the word.

>>> text = open('words.txt')
>>> def rotatable(text):
    by_length = {}
    for line in text:
        word = line.strip()
        for line1 in text:
            guess = line1.strip()
            if len(word) == len(guess):
                built = ''
                n = ord(guess[0]) - ord(word[0])
                i = 0
                for letter in word:
                    m = ord(guess[i]) - ord(letter)
                    if m!= n:
                        break
                    built += guess[i]
                    i += 1
                    pair = word + ' ' + built
                    if built == guess:
                        by_length.setdefault(n, []).append(pair)
    return by_length            #returns empty dictionary

>>58451004
>what good are you?

In regards to what? Being good for the sake of a culture or race is completely arbitrary. The truth is, whether that culture or race exists doesn't actually matter except to make someone feel like they belong and that they're valid. Supporting your race or culture doesn't make you any better in any way, shape, or form.

>>58451178
Split your function. This is unreadable.

>>58450532
Lisp

>>58451199
If you don't believe in your race or culture then you don't believe in yourself or don't wish to pay merit to the ones who came before you

>>58448724

$ info make

>>58451110
C

>>58451110
Rust

>>58451178
>all those foreaches and ifs

Use lambdas, you twat.

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>>58451224
I believe

>>58451216
No
>>58451278
Lambda is basically an incapsulated function, see above.
My code is pretty fancy, yet still highly readable.

>>58451274
>>58451273
>not (((Scheme)))
>>58451286
Based Ashkenazi 1 SD higher IQ than white barbarians

>>58451286
Good

>>58451288
As you said, it doesn't even work, and this is partially because it's difficult to read and reason about in that format.

>>58451288
Python:

for each i in asdf
  for each j in ivfoaj
    for each k in i
        ...

Haskell

i <- asdf
j <- ivfoaj
k <- i
...

the second is flatter

>>58451308
I think the two most insufferable posters are Haskellfags and Pythonfags.

Seeing them argue is like watching old men wrestle in the mud.

Is it useful to learn Perl?

>>58451324
You can try messing with 'yield' to create do syntax in Python

In Idris I believe you could do

let { i = !asdf; j = !ivfoaj; k = !i } in

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I CAN NEVER THINK OF THINGS TO CODE

>>58451224
>I need to be part of a tribe to validate my pointless existence.
Nigger level thinking friendo

>>58451353
Roman numerals converter

>>58451353
nigger/jew name generator

>>58451353
Get a job.

Working with live data gives you all sorts of ideas of actual useful things to make.

>>58449755
Java + Android API studio shit

>>58451368
Already been done, why would you do it again?

>>58451308
Python:

for (i, j, k, ) in list(product(*[a, b, c])):
    print(i, j, k)

this is my dictionary

my_dict {
    'a' : [1,2,3,4,5],
    'b' : [7,8,9,4,2],
    'c' : [4,4,2,3,6],
    'd' : [1,1,1,2,1]
}

i have to print the sum of every element with brute force, like:

sum(a) + sum(b)
sum(a) + sum(c)
sum(a) + sum(d)

sum(b) + sum(a)
sum(b) + sum(c)
sum(b) + sum(d)
...

how to iterate through this dict? i can't just range like in lists..

Hi, /g/. Gotta C exam now. I may need some help. Watcha say?

>>58451368
I want to make something cool/useful

>>58451371
This could be cool/useful

>>58451373
I'm a full time student

>>58451381
>Already been done
Post it then

>>58451384
The third part of my example iterates on something already iterated on

>>58451409

Install-Package RomanNumeral

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>>58451353
Have you tried coding a program?

>>58451386
for i in my_dict:
for j in my_dict:
print(sum(i)+sum(j))

or something like that but less shitty

>>58451436
Have you?

>>58451436
No, only programming a code

>>58451437
am retard pls ignore.

>>58451442
I don't write code, I'm a webdev ;^)

>>58451431

  File "<stdin>", line 1
    Install-Package RomanNumeral
                               ^
SyntaxError: invalid syntax

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>>58451449

>>58451371
Got a list of Jewish last names or first half / last half syllables?

I'll do this quick.

>>58448393
Let us see some code

>>58448304
>tfw have paperback copy of 1988 ansi c book coming in the mail soon
by soon I mean like a week from now, but still, excited. Recommended tutorials or other resources to hold me over and get me into c before it comes?

>>58451496
l
o
l

>>58451373
In regards to this, since many people here are still students, like me, I was wondering if anyone has some tips to getting internships where you actually code. Like, where do I go to apply, is it a good idea?

>>58451505
lad, if I took the advice from every anon on /g/ about books, I would never read anything at all. I swear, every book in the wiki will have at least ten people that scan every thread just to tell people that it is a meme/bs/etc. or that you should read this 2000 page textbook instead, and then somebody says that that textbook is a meme/bs/etc. and the cycle goes on forever. If I took /g/'s advice the only possible non-meme way I could learn programming would be from a random divine revelation.

>>58451522
internships are a waste of time. don't do work if you're not getting paid

>>58451556
But I thought it would be useful to get the real world experience for my own personal code? Plus I have nothing else to do and already worked and saved up enough money to support myself for a while.

>>58451555
Divine revelation is a meme, read SICP.

>>58450189
>It's like Oracle wants a language with the flexibility of Common Lisp and the type safety of Haskell.
Doesn't everyone? Oracle just don't have the option of a clean slate.

>>58451626
>type safety of Haskell

bad :: a
bad = bad

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>>58451371
>>58451405
I have done the needful.

I've generated sample names for Jewish Father / Black Mother children.

Pic related.

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>>58451638
>I can make bottom type safe in other languages

>>58451672

bad : ∀ {A} → A
bad = bad

Rejected.

>>58451496
CS50.

Also if you've never programmed before then I wouldn't dive right into K&R. It's a godly introduction to C, but not so much an introduction to programming.

I strongly recommend watching CS50 or using other resources to learn the basics of programming before diving into K&R or you'll get lost.

>>58451563
Work on open-source projects on GitHub if you really despise money, much more rewarding than an internship IMO.

>>58451710
I have programmed before, and I actually started cs50 back in a comp sci ind. study in HS, but quit because I felt like I had learned all of the concepts in class anyways. I am sure I have forgotten a shit ton though. I learned the standard AP comp sci shit, meaning Java. So I do have experience with programming, just not all too recent experience, although I made a little project in ruby recently with not too much difficulty. Any other recs? I don't mind doing cs50 again but it may feel bretty tedious.

>>58451337
Bumping question

>>58451743
Then just wait for the book. It's a complete reference to C in on itself and anything else will pale in comparison. Though you might enjoy reading C tutorials online in the meantime so when the book finally arrives you can appreciate just how elegant and ideal is the code in K&R compared to the shit you see everywhere else unfortunately.

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Alright this should be for /wdg/ but this also applies to some of you faggots who recommend languages for web dev.

Why did I believe the faggots shilling C#?
>be into php7 with few small projects on github
>see c# shilled fucking everywhere on wdg and dpt
>invest in very large C#/.NET book
>fill my head with this microshit (end up enjoying it desu :^))
>upload small c# projects to github
>apply to fuckton c# jobs while learning
>apply to like 3 php jobs
>get a fucking interview to use php

This is what the C# shills won't tell you.
>it's majoritively large companies who're looking for c# devs right now
>smaller businesses are more attracted to the likes of php
>to get a c# job in a large company you're gonna need a degree

I'm just thankful I realised this shit only 3 weeks into my learning. But I fucking invested so much time and effort omg.
>250+ pages of this lengthy af book
>at least 3 hours a day dedicated to learning or coding in c#

tl;dr DO NOT DIVE HEAD FIRST INTO LANGUAGES BEING SHILLED ON THIS FUCKING MEME BOARD.

>>58451696
That's *a* bottom. Are you advocating total languages?

Because that's fine if you are :)

>>58451386
use itertools.combinations on the dict.values if you are only interested in the outcome and not in whethere it combined a and b or a and c
and yes you can iterate over a dict

for key in dict:
    print key

prints a, b, c,d
(equivalent to for key in dict.keys())

for value in dict.values():
     print values
or even

for key, value in dict.items():

>>58451852
>learned C# for a web-dev-specific position

Sounds like you didn't do your research, mate.

C# is the GOAT full-stack language, and many of the jobs are back-end roles.

Also, I'm a C# dev at a small company, but you're certainly right that it's still more at-home in the enterprise.

Many people I know that use C# at SMB or for freelance use it because it's easy to rapid dev all sorts of things, particularly with Azure integrations. For example, my current projects are automated deployment of Azure Data Factory components and a Xamarin-based iOS/Android app for a service desk company.

>>58451656
>No Tyron Schlomo

>>58451891
>and yes you can iterate over a dict
yeah, but if i do

for key in my_dict:
    for key2 in my_dict:
        print sum( my_dict[key] ) + sum( my_dict[key2] ) 

it will print repeated values, and i dont want that

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>>58451907
>C# is the GOAT full-stack language, and many of the jobs are back-end roles.
>Many people I know that use C# at SMB or for freelance use it because it's easy to rapid dev all sorts of things

THIS IS EXACTLY THE SORT OF SHILLING I'M WARNING AGAINST

I CANT HOLD IT ANY MORE


REEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

>>58452021
The fuck are you on about? Plenty of people use it for exactly these things.

What were your specific issues with the language other than anecdotal evidence on failing to get an interview at various companies that decided you weren't good enough for them?

Fucking webdevs, go back to your containment thread.

>>58452051
THIS IS EXACTLY THE SORT OF SHILLING I'M WARNING AGAINST

I CANT HOLD IT ANY MORE


REEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

>>58452021
Nazi frog posting must be bannable on the blue boards.

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>>58452051

>>58452021
>>58452084
>>>/g/wdg

>>58451743
Try to make a few simple things in C.
For example, make a program that calls a function from a different .c source file than the one containing your main() function. You will have to use headers.
Or a program that replace

int main()

with MAIN(), using macros.
I never read K&R to learn C tbf, just used pdfs of Understanding and Using C Pointers, 21st Century C and online tutorials. I already had some basic experience with Java and Python though.

>>58450915
>

const string &prompt

C++ developers will defend this

>>58450160
Good job anon. The feeling after completing a program is the best.
What was it btw?

>>58452197
a simple 3D bin-packing algorithm using meta-programming.

fun stuff!

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>zero cost exceptions are implemented using a lookup table from instruction pointers to unwinding procedures

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>programmed in assembler last night
>can't wrap up the head back to high-level abstractions
fuck me

>>58452231
what is that picture suppose to represent?

>>58452192
What about it?

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Why does my lecturer have a problem with this?

void pause (unsigned interval)
{
    time_t unpauseTime = time(0) + interval;
    while (time(0) != unpauseTime);
}

>>58451943
so use

import itertools
for key1,key2 in itertools.combinations(mydict, 2):
    sum(mydict[key1]) + sum(mydict[key2])

its in the stdlib

>>58452348
because it's a busy waiting loop

>>58452358
thanks dude!

>>58452348
>!=

>>58452348
if your computer lags and misses the moment where unpausetime is exactly time(0) it will sit there literally forever/until something wraps around

>>58452222
You've just thrown a s4s::repeating_digits<Quads> exception. But no one caught it, so it aborted your thread without any reply. Except this one, you might say, but this message is actually a meta-reply, so it doesn't count.

>>58452477
kys

>>58452261
It must suppose anything?

how do i structure a chess bot in c

>>58452535
Like all other c projects just use one 10 000 line file

What is your favourite language feature that your favourite programming language doesn't have?

Default parameters for me.

>>58452578
Higher kind/rank polymorphism

>>58452383
How do you make a non-busy waiting loop? Surely the program can't unpause without knowing the time, which means it has to keep checking the time.

>>58451294
Scheme would actually be a smart language, that's the joke. C is the language you use when you think you're smarter and superior in intelligence to other developers

>>58452578
Generics.

So what are the specific advantages of purely functional languages? Most support I hear seems more ideological than concrete.

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>>58452578
Dependent types.

>>58452578
interfaces and enums

>>58452621
Specifying effects means easier reasoning and better optimization.

>>58451308
>not using racket scheme which has a macro for nested for's as well as explicit version

(for ([x (in-list A)])
  (for ([y (in-list B)])
    (for ([z (in-range N)])
      ...)))
; same as:
(for* ([x (in-list A)]
       [y (in-list B)]
       [z (in-range N)])
  ...)

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working on a corruption of champions clone, engine is almost finished but cant arse myself to do the gui

>tfw when vps host gave me an extra 60GB disk space for free

>>58452348

void pause (unsigned interval) {
    time_t u = time(0);
    time_t t  = u + interval;
    while ( u < t )
        volatile asm ("nop");
}

>>58452578
A good type system (theyre working on it)

>>58452710
What langugae?

>>58448304
What programming language has a BASIC-like syntax and way of working?
all this java stuff with all these parenthesis is really confusing

>>58452592
>How do you make a non-busy waiting loop?
You call the operating system waiting function, which will simply not give your program any processor time until the time has elapsed.

>>58452750
python

>>58452621
Much of Haskell's semantics force it to be purely functional, for instance lazy evaluation and some aspects of the type system.
Most people hate on lazy eval for being inefficient, which it usually is, but it also allows you to design program flow however you want, and doesn't restrict you into as specific of semantics as most other languages.
Like many novel language features, it's hard to take advantage of unless you are experienced with the language.

>>58452578
Message Passing
Pattern Matching
N:M Threads

>>58452737
Racket.
I should have been more specific: a good *static* type system. Typed racket exists but I always just use dynamically typed Racket because I don't have to fuck with the sub-par static type checker.

>>58452775
However Racket DOES have:
- default parameters
- generics
- message passing OO
- pattern matching
- software & hardware threads

I figured this would be a good place to ask; does anyone know any GOOD websites that just run you through touch typing and give you good practice? Preferably with a little picture of where to place your fingers on each keystroke to help me learn?

I can type like 50 - 60 wpm using my retarded method at the moment, but my finger(s) get fucked after awhile. I use like three fingers on my left hand to deal with most of the left side of the keyboard, but then the right side is almost entirely occupied using solely my right index finger

Need to break the decade long habit I've developed so I can type more comfortably

>>58452578
ad hoc polymorhpism (they're working on it)

>>58452578
Language-feature discriminated unions

They're implemented in an easy to use 3rd party library, though.

Also, more pattern matching features. They're working on this.

I've had to do some web dev recently to get this small project deployed and let me tell you,

web dev fucking sucks

>>58450848
>>58450857
this isn't that crazy. invoking functions in C binaries is trivial in C#, so it's not uncommon to isolate platform-specific and/or performance-critical code into a C DLL and invoke it from C# code. saying you use C(#) could be a lazy way of saying you use both C and C# in your development stack

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I'm doing things!

>>58451852
>too stupid to get a degree
>only wants to learn about programming to get some webdev codemonkey position

poo.init()

>>58453408
Neat. C#?

Looks like a fun shader toy project..

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>>58453463

It's actually all just simple image manipulation. That one is this normal map applied to an image.

Q U I C K
post a sorting algorithm thats the most like you

who else /bubblesort/ here?

>>58453489
image related shti is fun. I'm planning a big project relating to it atm.

Might never get to start it though. It's a big some-day project...

>>58453559
what does it do

So I know Java developers are at the very bottom of the foodchain here.

What about C# & .NET developers?

>>58453534
randsort

>>58453598
webdev in any language is bottom of the food chain here

if you're doing real programming in java you're somewhere in the middle

>>58450483

Download Termux. It's a command line tool for Android with a built in package manager. From there, you can use apt to get clang, python, ruby, and some other tools. There's a lot missing from the repositories, sadly, but you may be able to compile other compilers with clang, make, cmake, and other build tools.

>>58453617
.NET isn't web development, you dud

>>58453534
bogosort

>>58453655
I didn't say it was, numbnuts.

>>58453617

What about real programming in .NET? It has plenty of uses other than ASP.NET...

>>58453598

The upper crust of the garbage heap.

>>58453663
Why did you even mention web development, if he said C# and .NET?

>>58452696
Shouldn't you use the pause instruction or the POSIX sched_yield instead?

>>58453669
See: >>58453663

>>58453690
I was establishing the true bottom of the food chain, with the hope that people would make the obvious inference that if you weren't do that, you weren't at the bottom.

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How can I make these align so that the health boxes start in the same place and if the enemy's name is too long, it gets carried over to the next line (about 30~ characters per line)

>inb4 learn a real language
I will eventually.

>>58453734
count characters, determine how many \t you need by that
eg
if tab = 4 characters and line text = 3 ch
you want 2 tabs
if next line is 5 ch you want 1 tab
so on

>>58453408
>>58453489
I wonder what that would look like when animated?

The normal map looks like Voronoi cells with some shading applied. It could be animated, but not easily; you have to move the points around very smoothly and it is going to be very slow, because you have to check every point from every pixel and because the points move, you can't use any precomputed lookup structures. (Or you can, but they're per-frame, so they don't accelerate anything.)

>>58451852
>learn enterprise language
>don't look for a job in enterprise sector
>complain

????

>>58453734
For the former you can just use the length formatting.

print('{0: <20} {1} {2}/{3}'.format(self.name, self.healthbar, self.health, self.maxhealth))

(Where 20 is the number of characters to fill spaces with up to).

>>58453734
>if self.tattled == true

NEW THREAD!

>>58453794

>>58453593
software for creating animations. Pretty much like flash + photoshop.

>>58453759
>The normal map looks like Voronoi cells with some shading applied.

That's how I was going to accomplish the effect originally.

>>58453797
too early you stupid cunt

>>58453598
>>58453617
What food chain? Who the fuck would be at the top?

>>58453756
>>58453777
alright, thank you!

>>58451491
go laugh about your mother, faggot

Are you guys actually able to solve those exercises of string manipulation we find at the beginning of every goddamn programming course, like "hey here's this random string : 'fkdjhsjfhaqzdjjezsdh', can you find the longest substring in alphabetical order ?" ?

Every time I want to get into programming I face these exercises. I've been interested in computer since I was fucking 12, and now that I'm 20 I still have no clue how to solve those, so I still can't program cause I've never made it through the introductory chapters of any course.

>>58453797
Must suck being retarded

>>58453854
What's the difficulty?

>>58453534
Bogobogosort

>>58453883
If I knew why it's hard, I could have improved

>>58453854
>so I still can't program cause I've never made it through the introductory chapters of any course.

This is a non-sequitur. Find a good book on Python and get cracking.

If you don't want to do an exercise, skip it.

>>58453854
Learn to divide problems in your head.

How do I get each sub-string of a string?
How do I check if a string is in an alphabetical order?

If you can do those two things you can solve your problem.

You can get fancier and brute force'y with experience.

>>58453944
*fancier and LESS brute force'y

>>58452756
no

>>58453944
I've done that, sort of ...
Came up with this : http://pastebin.com/12eVX19f
which works for a few strings, but not for the vast majority, I don't even understand how that's possible

>>58453971
>if alphabet.index(s[i+1]) >= alphabet.index(s[i])
i've never used python
is this really how you compare characters?

>>58453994
This is probably not how most people do it, but this is how I did it since I had no clue how to do it otherwise

>>58453854
You're not good with logic. One way I used to practice this was solving math contest problems. (AMC, USAMO, etc.)

Start with the problems for 5th grade and so, and as you become more acquainted to them work your way up. You can stop once just before you reach USAMO level (autistic-level hard).

It may take a year or so before you're good enough, but what can you do? Programming is all logic these days, you have to figure out good ways to solve complex problems and teach the computer how to do it. Most of the braindead stuff is already automated so you'll be useless if you can't get past the introductory logic exercises of every programming course.

>>58454015
look up what an ascii table is

also the solution for the alphabetically ordered string is to go from the start and check if every letter is in order(just compare the character at your index and the next one)
if you get a character that isnt in order, start it all over again from that character while remembering the longest string so far

>>58453854

f = find isSorted . reverse . sortOn length . join . map inits . tails
    where isSorted = ap (==) sort

>>58453944
What's wrong with brute force?
>reverse . sortOn length

>>58454144
It's unlikely to yield optimal solutions.

>>58454172
:(

What about optimal by character count?

>>58454210
you can do this in O(n), why make it more complicated

>>58453854

Longest substring in alphabetical order? That's a trivial problem that can be solved with just one for loop, since we don't need to iterate over any substrings multiple times. If you find an alphabetical substring of say, 9 characters, it stands to reason that you won't find any substring beginning in that other substring that is longer and in alphabetical order, because the character ending that order is the same.

>>58454343
That sounds like less fun than breaking out the S combinator.

>>58453598
I'm not getting the foodchain analogy.