The 2nd Monitor

Duga

12:00 AM

RELOAD! There are 3237 unanswered questions (91.9783% answered)

Stack Exchange

0

Q: If in doubt, post the question on meta first?

Not for lack of trying, I get down votes on some questions. And on those questions I nevertheless often get answers. So if I try to delete the question to approach it differently, I get the warning that doing this repeatedly can get my account frozen. So I'm wondering if I should instead first p...

Hosch250

12:17 AM

I don't have any .cs files.

Oh, nice catch.

Captain Obvious

12:28 AM

0

Q: How could I increase the speed of this code?

I am fairly new to programming and even newer to C++ but I am currently in a class for scientific computing, and our task from two weeks ago was to improve the speed of a primality test program, I regrettably do not have the original code because I wrote over it... my bad, but the long and short ...

c++

skiwi

12:40 AM

@StackExchange Voluntarily drafting a question on the SE network doesn't even seem to be a bad idea, actually pretty good

LOL I just heard someone talk about a flying plant

51

Q: Are flying plants possible?

Is it possible for a plant to have the ability to fly? More exactly, the plant would either need to live without having roots (and it would never need to touch the ground), or with the ability to re-root itself in another location from time to time, or maybe a plant that has a permanent pedesta...

flora flight

Of course there is a WB question for it

Phrancis

lol

→ 8 messages moved to The Nth Monitor

Phrancis

1:03 AM

@StackExchange Answered

Captain Obvious

1:48 AM

0

Q: check determine match

Working on below problem, any advice of code functional bug, performance in terms of algorithm time complexity, code style are appreciated. Code written in Python 2.7. Problem, Write an algorithm to determine if all of the delimiters in an expression are matched and closed.{(abc)22}[14(xyz)2]...

python algorithm python-2.7

Captain Obvious

2:16 AM

0

Q: Implementation of Resenblatt’s perceptron ,LMS algorithm Single Layer Network and Back-propagation algorithm (MLP) Network

I wrote a Java program implementing Resenblatt’s perceptron Single Layer Network , Least Mean Square algorithm for Single Layer Network and Back-propagation algorithm (MLP) Network. i'm trying to write efficient and clean code. NeuralNetwork class package fcis.asu.neural; import java.util.Map;...

java neural-network

Hosch250

I made a burnished steel theme for my Checkers:

Captain Obvious

0

Q: Which way is better building new object in javascript

I have two functions that does the same thing. But I am not an expert on Javascript. In fact, I am recently learning the beauties of javascript. So could you explain me which way is better for performance issues and which is more elegant. In conclusion which one should I use. function formatOutp...

javascript performance

Hosch250

This person keeps doing minor tag edits: codereview.stackexchange.com/users/103677/tolani-jaiye-tikolo

Should I stop approving them as being too minor, should we just let them get to 2k and stop naturally, ...?

Phrancis

2:35 AM

@Hosch250 Looks good

@Hosch250 Tags edits are fine, I'd just let it go as long as they are good edits

Hosch250

3:06 AM

I just added bevels to my pieces.

Captain Obvious

0

Q: Connect Four game (Java)

This is a simple implementation of Connect four in Java. It is working correctly so far. What I haven't done yetis the diagonals check and input validation. package game; import java.util.Scanner; //TODO check for diagonals, input validation public class Game { private char[][] gameBoard;...

java game

Captain Obvious

3:30 AM

0

Q: Synchronization of transaction processing

There's a server which does the following: Receive request with transaction id Load corresponding transaction from storage. New transaction object is returned each time Process transaction Save updated transaction back to storage The task is to properly synchronize steps 2, 3 and 4. Since fo...

multithreading thread-safety

Captain Obvious

3:52 AM

0

Q: Check if the array contains duplicate values

Description: The problem is old ans simple but I wanted to try it by different way. With some extra memory I have created OOP based solution. Hopefully it doesn't hurt in the interview. Code: import java.util.*; import java.lang.*; import java.io.*; class Main { static class Solution { ...

java performance algorithm programming-challenge reinventing-the-wheel

Captain Obvious

4:13 AM

Recent Questions - Code Review Stack Exchange: quantum chemistry in C++ [on hold]

posted on December 25, 2016 by mamun

I am trying to write simple quantum chemistry code in C++ (to learn both C++ and quantum chemistry). Here is my header file "Molecule.h" using namespace std; class Molecule { public: int natom; int charge; int *zval; double **geom; void print_geom(); void write_geom(char *outfile); double bond(int atom1, int atom2); Molecu…

Phrancis

Any idea what I'm doing wrong?

EBrown

@Phrancis What compiler?

Phrancis

Um GCC I think. Running on Windows 10

EBrown

You can use C as a script?

Phrancis

I have no idea

Just trying to get C to work

EBrown

4:25 AM

Usually it's compiled with gcc.

(Et. al. but that's the easiest example.)

Phrancis

What would the command be, instead of ./helloworld.c ?

EBrown

gcc helloworld.c

Then it will (possibly?) generate an a.out (et. al. file).

Phrancis

Phrancis@MSI ...c/Scripts/C % gcc helloworld.c
zsh: command not found: gcc

EBrown

I have no idea lol

Phrancis

Me neither

I know it can find the file and run it, I'm just puzzled about the syntax error

EBrown

4:29 AM

Try int main(int arg, const char* arg[]) instead.

Phrancis

Same thing ./helloworld.c: 3: ./helloworld.c: Syntax error: "(" unexpected

(3 being the line that main() is on)

EBrown

Huh, I'm out of ideas. It looks like valid C to me.

Phrancis

Is the #include <stdio.h> supposed to have a semicolon to terminate it?

Very strange, I guess

Phrancis@MSI ...c/Scripts/C % #include <stdio.h>
zsh: parse error near `\n'
Phrancis@MSI ...c/Scripts/C % int main() { printf("test"; return 0; }
Phrancis@MSI ...c/Scripts/C %

Phrancis@MSI ...c/Scripts/C % print("test");
zsh: missing end of string

Fun stuff

Guess running C from the command line is not how it works :D

Hosch250

4:47 AM

@Phrancis I'm not too sure, but is it expecting \n, and you have \r\n?

I'd be shocked if that was it...

Phrancis

I changed the code now to

#!/bin/bash
#include <stdio.h>

int main() {
   print("Hello, World!");
   return 0;
}

And getting

Phrancis@MSI ...c/Scripts/C % ./helloworld.c
./helloworld.c: line 3: $'\r': command not found
./helloworld.c: line 4: syntax error near unexpected token `('
'/helloworld.c: line 4: `int main() {

Hosch250

@Phrancis Use printf.

#include <stdio.h>
int main() {
    printf("Hello World!");
    return 0;
}

Phrancis

OK, same error though

I'm just not sure where to look for the issue, apparently syntax error near unexpected token '(' is a pretty common error

Hosch250

On a better note, I got plastic pieces working in my checkers.

@Phrancis Huh, it looks like it isn't expecting the \r.

Change all your line endings to plain \n.

> line 3: $'\r': command not found

That's the blank line.

If anyone has experience with UI, feel free to ping me in my warroom.

Phrancis

Still can't get it to work after changing the line endings

I'm not sure if it's a compiler issue or a code issue

Hosch250

5:05 AM

What system are you running?

Phrancis

I'm not sure what you are asking exactly

W10 with the Ubuntu install thing

And added zsh

Phrancis@MSI ...c/Scripts/C % bash
Phrancis@MSI:/mnt/c/Scripts/C$ ./helloworld.c
./helloworld.c: line 2: syntax error near unexpected token `('
./helloworld.c: line 2: `int main() {'
Phrancis@MSI:/mnt/c/Scripts/C$ zsh
Phrancis@MSI ...c/Scripts/C % ./helloworld.c
./helloworld.c: 2: ./helloworld.c: Syntax error: "(" unexpected

Ah well, maybe later. It's Monxmas. Gotta enjoy it.

I wonder if maybe the issue is with Sublime Text 2

Hosch250

Well, unless you need C, I'd say to just learn C++.

And use VS.

Hosch250

5:37 AM

Captain Obvious

6:14 AM

0

Q: Check if a given integer is power of two

Description: Given an integer check if its the power of two. Code: class Main { static class Solution { private final boolean answer; Solution(int num) { if (num <= 0) { answer = false; } else if ((num & (num - 1)) == 0) { answer = true; } ...

java performance algorithm programming-challenge reinventing-the-wheel

Phrancis

Got it to work, following directions from MSDN -.-

Duga

6:54 AM

I'm voting to close this question as off-topic because it belongs on Code Review. But even for there, "it feels a bit messy" is borderline. — Jim Garrison 41 secs ago

Phrancis

What the...

int main() {
	float pi = 3.1415;
	printf("%d\n", pi);
	// -1073741824
}

Oh, found the issue

%d casts to an int

BTW.RTFM

Stack Exchange

7:15 AM

1

Q: Best of Code Review 2016 — Now Accepting Nominations!

As 2016 comes to an end, let's kick off Best of Code Review 2016! All Code Review users will be invited to nominate (link to) the best questions and answers from this year, and showcase them as examples of what great CR questions and answers should look like. Prizes in the form of bounties will...

discussion fun best-of

Phrancis

Best of Code Review 2016 — Now Accepting Nominations!

13

Duga

7:53 AM

You should put this on codereview. — Jeroen van Langen 50 secs ago

Duga

8:05 AM

@square1001 Now that you have code, and if you think it works, you may post over at codereview.stackexchange.com/tour instead. — cricket_007 1 min ago

I am confused. What's your question? You may want to go to StackExchange Code Review, this seems like a code review post? — Tee See 29 secs ago

This doesn't sound like working code, from the description, and would be off-topic on Code Review. I'm voting to close as unclear, because there is not a clear question to be answered here. — Phrancis 43 secs ago

Phrancis

8:25 AM

I wish upon a star, that I had VTC privileges on Stack Overflow.

Getting tired of flagging...

Phrancis

8:43 AM

Some friend of mine said one can learn C in 2 hours. I'm pretty sure he is wrong...

Captain Obvious

0

Q: Transforming text after preprocessing to tfidf vector and reducing the dimension using pca

class StemmedTfidfVectorizer(TfidfVectorizer): def build_analyzer(self): analyzer = super(StemmedTfidfVectorizer, self).build_analyzer() return lambda doc: (english_stemmer.stem(w) for w in analyzer(doc)) vectorizer = StemmedTfidfVectorizer(min_df = 1, stop_words = '...

python-3.x

CommitStrip

9:06 AM

CommitStrip: Meanwhile, on Christmas Day…

posted on December 25, 2016 by CommitStrip

Mast

9:27 AM

@Phrancis You can learn Hello World in 2 hours.

Afar from that, no.

Captain Obvious

0

Q: Getting error on form submit using jquery

I have a jquery function which is perfectly validating all fields using .blur function but if i click the submit button without filling the data it comes with null values . How can I validate the button so that no null values will send. jQuery $(document).ready(function () { if ($("#your-n...

jquery html validation

Phrancis

Hmm, managed to crash C for the first time :D

The compiler didn't say why

Mast

You crashed your compiler?

Phrancis

More or less, yes

Mast

That doesn't happen often.

Phrancis

9:35 AM

Crashed at run time

Mast

Ah, that, yea.

Dan Pantry

Merry Christmas, CRitters!

6

Mast

That's not your compiler.

Monking @DanP

Dan Pantry

Monking

Phrancis

Merry Monxmas!

I made it not crash anymore, but I must be missing something fundamental

Mast

9:37 AM

If it's small, drop it in chat.

Phrancis

It's a fizzbuzz, but an empty string is being printed instead of the number, when it fails the fizzbuzz check

#include <stdio.h>

char * getFizzBuzz(int n) {
	if (n % 3 == 0) {
		if (n % 5 == 0) {
			return "FizzBuzz";
		}
		else {
			return "Fizz";
		}
	}
	else if (n % 5 == 0) {
		return "Buzz";
	}
	else {
		return "\0";
	}
}

int main() {
	for (int i = 1; i < 20; i++) {
		char* result = getFizzBuzz(i);
		if (result[0] == "\0") {
			printf("%d\n", i);
		}
		else {
			printf("%s\n", result);
		}
	}
}

I need to set Sublime Text to use spaces instead of tabs, sorry -.-"

Mast

Np.

Your if statement is likely always true. Add a debug printf there.

Phrancis

It couldn't have a normal settings menu like every other program, instead it's a JS object file you have to edit and save in another location and it just doesn't work right

Mast

if (result[0] == "\0") {

Phrancis

So, yeah apparently my empty-string check or return is wrong, not sure which yet

And fixed, by returning NULL instead of "\0"

Still kind of perplexing why it wouldn't work though

Mast

9:49 AM

:-)

And that's why you can't learn C in 2 hours.

Phrancis

char* getFizzBuzz(int n) {
    if (n % 3 == 0) {
        if (n % 5 == 0) {
            return "FizzBuzz";
        }
        else {
            return "Fizz";
        }
    }
    else if (n % 5 == 0) {
        return "Buzz";
    }
    else {
        return NULL;
    }
}

Freaking tabs man

Martin R

You cannot compare (the contents of) C strings with ==

Mast

^^

Phrancis

That makes sense, I suppose

How do you do it then?

Martin R

That's what strcmp() is for.

And Merry Christmas to everybody!

Phrancis

9:52 AM

So strcmp(foo, "") essentially?

@MartinR To you as well!

Mast

if(strcmp (foo1, foo2) == 0)

strcmp will give you the difference. If the difference is 0, they're equal.

Phrancis

Strange, but I guess I shouldn't be surprised; it is C, after all...

Mast

It's not hard, it's just not as 'intuitive' like other languages.

Unless C is your first language.

Martin R

pubs.opengroup.org/onlinepubs/009695399/functions/strcmp.html

Phrancis

So returning NULL is probably not a good idea if it's a char* myFunc() right?

Mast

9:55 AM

Meh, it works.

Phrancis

I personally like NULL just fine, but... programmers get angry about stuff :)

Mast

If you're looking for best practices in C, I don't know them by heart either.

MISRA C

MISRA C is a set of software development guidelines for the C programming language developed by MISRA (Motor Industry Software Reliability Association). Its aims are to facilitate code safety, security, portability and reliability in the context of embedded systems, specifically those systems programmed in ISO C / C90 / C99. MISRA has evolved as a widely accepted model for best practices by leading developers in sectors including automotive, aerospace, telecom, medical devices, defense, railway, and others. There is also a set of guidelines for MISRA C++ not covered by this article. == History... ==

MISRA C is one of the best industry C standards around.

Phrancis

I can't imagine debugging a program written in C

Mast

Why not?

Much easier than debugging ASM.

It just takes some getting used to.

Phrancis

Maybe it's a lot easier than debugging Node.js also

Captain Obvious

10:11 AM

0

Q: Strongly typed Dependency Property builder & extensions

I've been working on another builder, this time for the DependencyProperty because it's object-based. This means that every parameter is an object and thus their usage is inconvenient (requires casting). In my experiment I tried to make its creation easier and at the same time generic. This is ...

c# design-patterns generics wpf extension-methods

Mast

I think C is more intuitive than Node.JS, but that could be me :P

Phrancis

I think it is too

C is just very... crude. Like, too simple or something

Mast

One of the reasons C was invented was to have an architecture-independent version of ASM, a bit higher level.

Programming was different back then.

Phrancis

For someone who likes melodic / instrumental music, Final Fantasy XV opening theme may be very enjoyable

@Mast That makes sense

Isn't a lot of modern programming inspired or derived from C?

Mast

@Phrancis Totally different from what I expected, expected more something like this. More bombastic.

@Phrancis That's like saying a lot of inventions are inspired or derived from the wheel.

It's kind-of true, but it's also kind-of an empty statement.

Phrancis

10:17 AM

Ah

@Mast They worked in the Prelude music in the menus in XV: youtube.com/watch?v=HHS8sJuE0dA

I really dig the chilled-out Moby-like feel

Duga

I believe @HovercraftFullOfEels intends codereview.stackexchange.com. — Ole V.V. 37 secs ago

possible answer invalidation by Super Mario's Yoshi on question by Super Mario's Yoshi: codereview.stackexchange.com/posts/150696/revisions

Phrancis

@Duga got it

Oh golly, C even has time.h gee that's gotta be fun

Dan Pantry

10:40 AM

@Mast As someone who likes Node - yes, I agree

C is more intuitive because it has so little substance in the language. It's very easy to learn all of C

Phrancis

10:51 AM

The new thing for me is pointers. I never thought of them, and always had a puzzled look when they were mentioned. That time is no more.

skiwi

@Phrancis Now you can get confused about segfaults :)))

Phrancis

@skiwi return 1;

skiwi

MOV EAX

Phrancis

ouch

Captain Obvious

0

Q: User Authentication PHP script

few days ago i made small PHP Authentication API with all basic functionalities (log in, log out, registration, getting authenticated member) and i got suggestions that i should use prepared statements for better performance and SQL Injection defense, so i made some changes on my script and it lo...

php api authentication

skiwi

10:56 AM

Gah how do I multilingual om phone

Multiline..

MOV EAX, 1
RET

Mast

@skiwi Implement a Shift key first.

skiwi

11:08 AM

esolangs.org/forum/kareha.pl/1134947629

Phrancis

@skiwi I installed CodeBoard keyboard on my phone to type code and otherwise do things that the normal keyboard isn't designed to do

It even has arrow keys for scrolling characters and lines

such recommend, many useful

Phrancis

11:29 AM

Oh wow this is weird

Why in the world would it do that

Jeroen Vannevel

Putting your array size on the identifier makes you a bad person

Phrancis

Wait I have a choice?

Jeroen Vannevel

Haven't you?

I know both ways work in Java so I assumed that came from C

Phrancis

Compiler disagrees with you

Jeroen Vannevel

bleigh

Phrancis

11:38 AM

IKR

I much prefer the array size on the type definition

So I guess I pass an undefined struct to a function, and maybe that's why it puts these screwed up values into the fields...?

OMG, I fixed it... with pointers

Things are making sense now

3

Duga

This question belnogs in CodeReview — Guy 59 secs ago

Mast

11:54 AM

> PEP 528, Change Windows console encoding to UTF-8
PEP 529, Change Windows filesystem encoding to UTF-8

They make it so hard not to switch, but I can't...

Phrancis

I was passing an empty/null struct into a function, then trying to change it then return the struct back, and of course it didn't work; once I passed a pointer to the struct instead, then changed the values, and returned a pointer back, it started working

Duga

Ok, thanks I will move it to the Code Review. — wdsa 41 secs ago

Mast

@Phrancis When to pointer and when not to pointer seems ambiguous, until you realize what a pointer is and why you'd want to use it.

Phrancis

Right, I can totally see that

Mast

I'd recommend you a good book, but my book catalogue isn't finished yet...

Peilonrayz

11:59 AM

@Mast One day, :P Hopefully the library you require update to Python 3 by 2020...

Phrancis

The thing I made is, more or less, like a constructor... it wouldn't make sense to give it an empty copy of itself and then expect the copy back with values added... rather you tell it where the self is, and then put the values there

Mast

@Peilonrayz I wonder whether they'll ever upgrade the AS/400 port to 3.6 as well.

@Phrancis Keep in mind C was created before the concept of OO was a big thing.

Peilonrayz

@Mast *frantically Googles AS/400* *finds nothing*. Oh, best of luck, ;P

Phrancis

@Mast Right. This is just one of those times to me when you finally figure out something that's been mysterious to you all along

Incomputable

and sometimes find something stunning

3

Q: Is infinite loop still undefined behavior in C++ if it calls shared library?

It's said that infinite loop for(;;); is undefined behavior. From http://en.cppreference.com/w/cpp/language/memory_model In a valid C++ program, every thread eventually does one of the following: terminate makes a call to an I/O library function reads or modifies a volatile o...

c++ infinite-loop undefined-behavior

Mast

12:08 PM

IBM System i

The IBM System i is IBM's previous generation of midrange computer systems for IBM i users, and was subsequently replaced by the IBM Power Systems in April 2008. The platform was first introduced as the AS/400 (Application System/400) on June 21, 1988 and later renamed to the eServer iSeries in 2000. As part of IBM's Systems branding initiative in 2006, it was again renamed to System i. The codename of the AS/400 project was "Silver Lake", named for the lake in downtown Rochester, Minnesota, where development of the system took place. In April 2008, IBM announced its integration with the System...

Phrancis

So in OO, when you use this (or self in Python) it's really just a pointer to the location of the object

Right?

Incomputable

@Phrancis in C++, yes. You can even write delete this;.

Peilonrayz

@Mast I thought that was more than just AS/400, as it the tables at the bottom go to 2008

Mast

@Peilonrayz It got renamed or something.

Computer names get complicated.

@Phrancis self had something to do with instance attributes, but something along those lines, probably.

Duga

If your code works well, you need to improve it, you can ask in codereview — Danh 45 secs ago

Phrancis

12:21 PM

@Duga Very well put together, if I say so myself

Phrancis

12:42 PM

Oh wow, C's union looks evil

Incomputable

@Phrancis it can be useful in raw form sometimes ;) though in a very limited cases. C++ has std::variant which actually builds on top of it

Captain Obvious

0

Q: Script to retrieve new youtube videos

Hi fellow python programmers! I wrote a script which retrieves youtube videos from your favourite channels - channels you specify in a .txt file. github page Example output Let me know what do you guys think about that. Thanks a lot!

python youtube

Incomputable

I believe g++'s std::string uses it to minimize space: until the string is small, they use three 8 bytes variables as 24 byte storage (23 user space, 1 for null terminator), and when it grows, they repurpose it as 1 pointer, 1 capacity and 1 size

Phrancis

That's clever

Seems like a micro-optimization, but applied on every string I'm sure it adds up to a lot

RubberDuck

Merry Christmas & a Happy Yule to All ~ Rubberduck & Family

2

Incomputable

12:52 PM

@Phrancis they store flags in the bits of the null terminator, to differentiate between small string and big string, and some others. Actually it made a big difference, since always mallocing is slow compared to on stack variable creation

@RubberDuck thanks! You too

Facebook did an optimization to std::string called fbstring, which gave them 1% better performance, but 1000% more obfuscation

Mast

@Incomputable C != C++

Incomputable

@Mast yeah, I forgot to mention that in C++ union is actually a class. It is possible to add functions, constructors, destructors, etc. Thanks for noting.

Phrancis

@Incomputable 1% performance over the entirety of Facebook traffic sounds like a lot of performance

Mast

@Phrancis If you got a hundred servers running, you now need one less. However, you just increased maintainability hell, development time and the risk of bugs.

Incomputable

@Phrancis not over entirety of Facebook :) but over std::string. From what speaker said 17% of the time CPU spends in strings, so it seems like it is 0.17% performance gain

Mast

1:06 PM

Doesn't sound like a good trade IMO.

Incomputable

@Mast totally agree with you. They did rather rush move

though they helped g++ to understand that it is bad idea, so they won't write that version

Phrancis

Ah, makes sense

Mast

lol

Captain Obvious

0

Q: Classes representing items in an RPG game

I wrote a little program in C# that contains classes representing Items in RPG game. I wanted to have access to all inherited classes parameters from list contains parent Item class instances, so this is my code: using System; using System.Collections.Generic; public interface SpecialObject { ...

c# oop inheritance interface role-playing-game

skiwi

Monking

I know it's Christmas and all, but I just joined the dark side :D

Incomputable

1:11 PM

@skiwi new Darth Vader? :D

skiwi

@Incomputable Darth Caching for now

The Caching Vader

Incomputable

@skiwi who is caching horde of Heisenbugs to invade us in 2017

Mast

@skiwi On the internet, nobody knows you're Santa.

Incomputable

by the way, when I first heard about Santa, I thought it is Santa Claws, not Santa Claus. I thought Western people like claws

Mast

Santa Claws is real.

3

skiwi

1:19 PM

@Mast Damn, it should be said "Merry Christmas!" on the hat :P

Phrancis

As a cat lover, I approve of Santa Claws.

Mast

Phrancis

AWWWWWWWWWWWWWWWWWWWWWWW

Incomputable

I liked pets when I was a kid. Now I don't like pets because I have a computer

Mast

Phrancis

1:23 PM

Cats and dogs can wreck a computer, each in their own unique ways.

4

Incomputable

for some reason last picture opens zoomed in in my browser, but the monitor is big enough to fit it in

Mast

@Phrancis Not just your computer either, your entire house.

Phrancis

^ dat

Mast

Incomputable

@Mast that's one of the reasons I don't like pets. I'm lazy

Phrancis

1:25 PM

#include <stdio.h>

struct {
    unsigned int isValid1;
    unsigned int isValid2;
} simpleValidation;

struct {
    unsigned int isValid1 : 1;
    unsigned int isValid2 : 1;
} bitSizeValidation;

int main() {
    printf("size of simpleValidation: %d\n", sizeof(simpleValidation));        // 8
    printf("size of bitSizeValidation: %d\n", sizeof(bitSizeValidation));    // 4
    return 0;
}

That's kind of neat

Now I remember what I forgot to do tonight... Sleep!

Mast

Sleep is irrelevant.

Incomputable

a very small catch: main() is not valid function signature for main

Mast

G'night Phrancis :-)

@Incomputable It is.

Phrancis

@Incomputable Compiler's not complaining

Mast

It's not best practice, but it's allowed.

Incomputable

1:28 PM

@Mast not in C, if I remember correctly

Mast

What compiler are you using anyway @Phrancis?

Phrancis

Uh, whatever the one that comes with Windows 10/Visual Studio is

Captain Obvious

0

Q: Make method call shorter

I wrote a method for validating properties based on passed conditions. It works well, but declaration takes more space than the actual condition. Is there any way to make it shorter? public virtual string Validate(string propertyName, params Tuple<Expression<Func<bool>>, string>[] predicates) { ...

c# oop validation linq-expressions

0

Q: Counting the Number of Inversions in an Imperative way in Scala

I have developed the following algorithm to count the number of inversions in an Array: However, it is not counting appropriately, I am missing some of the inversions over the merge step. How could I accomplish that? One important note is that, I want to solve this problem using a for loop, and...

algorithm array scala mergesort

Incomputable

@Phrancis should be enough if you're not planning crazy preprocessor metaprogramming

Phrancis

Microsoft (R) C/C++ Optimizing Compiler Version 19.00.24215.1 for x86
Copyright (C) Microsoft Corporation.  All rights reserved.

So anyways, TTGTB :)

Mast

1:30 PM

You usually pass arguments to main: int main(int argc, char **argv);

Incomputable

@Phrancis good night

is there any cheat sheet for the abbreviations like TTGTB? I tried to google it a few times, but couldn't find anything useful.

Mast

@Incomputable Time To Go To Bed

23

A: What's a Zombie? And what are the many other memes of Code Review?

Meme: [TTQW | TTGH] | TTGTB Originator: [attributed to] Simon André Forsberg (first TTQW here) Cultural Height: The 2nd Monitor Background: leaving the chatroom and/or going AFK isn't something we do often. These funky acronyms efficiently communicate that it's either time to quit work (or tim...

Incomputable

@Mast I got that one. I just thought that I could learn more and not ask about them each time. Also I forget/confuse them sometimes

@Mast oh I thought it is english abbreviations. Now I understood why google was useless

Mast

No, we invented them, kind-of.

29

A: What's a Zombie? And what are the many other memes of Code Review?

Name: Overly long acronyms Originator: Simon André Forsberg with this message Cultural Height: The 2nd Monitor Background: IWNPFETTOLAI (I will not provide further explanation than this overly long acronym itself)

Incomputable

they look like ntos or ntol (linux sockets functions)

skiwi

1:47 PM

@Phrancis Isn't it too late for that by now?

Mast

@skiwi American time, subtract 7 hours or so.

skiwi

Point still stands ^^

Mast

Sleep is a weird thing.

I used to keep odd hours before I married.

skiwi

Why?

Mast

And I still went to bed after 4 this morning, so...

Incomputable

1:53 PM

@Mast I do the same when I'm in dormitory. My sleeping hours slowly shift through the whole day.

skiwi

I slept from 2am till 10.30am, yay for no sleep schedules

Mast

@skiwi There's 24 hours in a day. That's all great if you have enough energy per day for 16 hours and can regenerate that exact amount in the remaining 8.

What if you can't?

What if your optimal day would be 30 hours?

A cycle of 24h is quite restrictive.

Some of us aren't wired like that.

Incomputable

@Mast that's actually the thing for me, though my effective day is ~10 hours.

skiwi

That would be slightly annoying indeed

Mast

So what you could do, let's ignore the fact work schedules usually aren't this flexible, is keep 30h days instead of 24h days. Shift your go-to-bed-time 8 hours a day.

But that doesn't work.

So you start varying.

Start skipping nights.

Which could work for a long time, if all days would be regular days.

And it usually isn't that regular, so you keep shifting.

Which effectively means bedtime can be any time.

skiwi

1:57 PM

I'm lately not rested even after 8 hours of sleep, which sucks

Now I don't need to wonder anymore why university was so difficult with averaging 6 hours of sleep though :D

Incomputable

I'm reading a holywar of C vs C++. For some reason, I'm becoming convinced that C++ is a tool for 2-3 cases, very special cases. Though C is like emacs, needs a lot to be able to do something useful

Mast

Most developers have no need to learn C. It's often used if you need something extreme-high-performance, extremely-low-latency or on an embedded platform, but afar from that, there's usually better alternatives available now.

Incomputable

@Mast I thought they were available like 10 years now

and yeah, no real reason to learn C++. Unless the programmer is sadistic

skiwi

I think C++ is the most powerful language of all... but

I find it hard to justify starting a C++ project

Usually another language will do the job easier, especially if you're not a C++ professional, I do have a project involving raw performance and I'm thinking about C++ for that

Incomputable

@skiwi it has overwhelming amount of things programmer needs to think about. It might be able to produce the best solution, but creating that is outside of humans' capabilities

skiwi

2:08 PM

I'm not so sure about that in C++17 and even more recent versions

Incomputable

@skiwi they actually make things worse for insane performance applications. But for everyday use, it's great

the reason is that things change too much, and programmers will need to rethink the choices

also, I still don't have idea if lambda is actually constructed or compiler does magic. With every version it just adds up magic, which will one day break it

RoboSanta

Naruto answer; accepted non-selfie answer with 0 score: Project Euler #58: Primes along the diagonals of a square spiral python performance programming-challenge python-2.7 primes

Incomputable

not that I'm an expert, though. I think checking out compiler is a good place to start, since they offer tons of macros, extensions and whatnot to help with that

Duga

If this is working code that you think could be improved, see Code Review. — jonrsharpe 23 secs ago

Mast

@Incomputable No, I was talking about C. There's still plenty of reasons to pick C++.

C++ is also the reason we have fewer and fewer reasons to pick C, because it does what C does with less downsides.

Well, different downsides really, but this is getting longwinded.

6

Q: Idiomaticy of macros in C++

Macros are considered a good thing by one and evil by another. Is there a rule of thumb when to and when not to use macros in C++? When are macros idiomatic and when should they be avoided?

c++ macros idioms

Incomputable

2:17 PM

well, when I write line of C++ code, I start hoping that it does what I want it to do. I don't have the confidence even after 1.5 years of nitpicking it's features

skiwi

As far as I'm aware C++ code will do exactly what I tell it to do

Mast

@skiwi At least it won't go all JavaScript on you and parse whatever bogus you throw at it.

Incomputable

@skiwi try to return an object with user defined move semantics (make it output something) from a function by value. It will move from the returned value instead of copying it

Mast

Both C and C++ have plenty of undefined behaviour left though, that's one of the reasons you should follow a style-guide for them.

And use ALL compiler warnings.

Incomputable

^ that. Try to fire up everything you have

skiwi

2:20 PM

I guess I'm fine with programming in C++ after having programmed in Assembly

Incomputable

@skiwi I think learning template metaprogramming will be fruitful for you then, if you know both Assembly and higher level language. It is really game changer

skiwi

My best bug was that I writing into the memory pointer instead of the memory where the memory pointer pointed at

Captain Obvious

0

Q: A modern and extensible C++14 Logger

I recently wrote this C++ Logger API code for a game engine. It needs to be as fast as possible so I tried to do postpone everything to compile time using different template meta-programming tricks (for instance static_if). Any advice, bug fixes or suggestions are welcome :) Here is Log.h: // C...

c++ c++14 logging template-meta-programming

skiwi

@CaptainObvious @Incomputable It's as if you asked for it :P

Incomputable

@skiwi I didn't ask for obfuscated code ;)

he tries to return string from constexpr function. He got it wrong

skiwi

2:26 PM

I'm curious why he's using FILE* though, I'd suppose C++ has something better for that by now

Incomputable

@skiwi that's why it's here for review ! :)

it has something more convenient, but it is slow at least in default mode (it syncs with C stdio, I guess some mutex lock or something). Haven't tried to benchmark "unleashed mode" (std::sync_with_stdio(false)). But C# did it right

but C++ allows to write C# reading function, which is actually written! fmt. I'd use it if I could make sense of all of that licensing thing

wow, it actually has ~2.5 times compilation time increase. Not so bad thing

Duga

If code is generally working, consider codereview.stackexchange.com. Otherwise, do you have any question besides improvements? — chux 24 secs ago

Transcript for