The 2nd Monitor - 2016-04-05 (page 3 of 5)

« first day (1067 days earlier) ← previous day next day → last day (2935 days later) »

Captain Obvious

2:02 PM

0

Q: Generic matrix in Java supporting arbitrary rotations in constant time

I have this generic "matrix" holding elements of arbitrary type. It supports any horizontal or vertical rotations (of any step size) in \$\mathcal{O}(1)\$. See what I have: package net.coderodde.util; import java.awt.Canvas; import java.awt.Color; import java.awt.Dimension; import java.awt.Grap...

Converting to plaintext:

user image

Hopefuly that produces something usable.

Because I tried using the built-in PDF converter and it crashed.

Sometimes, it works. Sometimes, it's horrendous.

and they overlap

Aye.

Can I have another answer here? I feel like the existing one doesn't cover everything.

2:07 PM

we don't really go writing languages like you guys do

:(

that's fine.

you might be able to find someone on PPCG to give you a better review

Go write some.

@CaptainObvious aww yeah I got a clever one for this

@Quill that might work...

2:08 PM

@EasterlyIrk it looks like fun, but I don't know how ;-;

@ConorO'Brien was thinking about writing a guide to writing languages.

@EasterlyIrk Turns out, most of the languages which already exist do a mighty fine job of allowing us to write code, so...

@Phrancis So you don't ever want a builtin to print ascii art goats????

3

Or have a command to turn '' to 'avocad'?

Nope. Time for the direct solution: Ask my Boss to phone the publishing company and get them to email over an actually usable version of the data.

@EasterlyIrk PHP does that

2:10 PM

@Quill Really? How?

^

it was a joke

because PHP

oh

lol

^^

not ^^

ಠ_ಠ

4 hours ago, by Quill

$foo = 'bar';
$bar = 'foobar';
echo $$foo;    //This outputs foobar

there's some fun PHP for ya

2:11 PM

Mathematica has a builtin for determining goats. I don't know how to feel about that. — Robert Fraser Feb 10 at 15:21

IKR?

@Quill What does it do, print the variable name and it's content?

yeah

the same thing works with functions

        ___
        \_/_         ___..._____....__\|/_
       / /_/__..---""___   ___ .    .  .  """---...___
__..--/ ( (       .  \_/   \_/            \|/    .   .
     /  | |   \|/     \ \  \ \     \|/
\|/ |  <  <  .     .   \ \  \ \   .        .        .
    \   \_ \            \ \ |  \
 .   \    `-.___    _.../__/   |   .   .      \|/  .
     /          `~~~      /   /
    |                   (    /
    |                  /     \   .     .   \|/
   /                          \
 .'                            \  .-"""-.

If only all languages had such a function, would make debugging easier.

2:13 PM

that seems unnecessary and evil

@EasterlyIrk That's not a goat.

$foo = 'bar';
$bar = 'foobar';
function bar() {
    echo 'Hello world!';
}
function foobar() {
    echo 'What a wonderful world!';
}
$foo();    //This outputs Hello world!
$$foo();

That's a sheep.

> that's no goat

@Mast ^

Is this a goat?

I WILL SWARM YOU WITH GOATS!!!

2:15 PM

oh my

Captain Obvious

0

Q: 3D bin packing algorithm using Java?

I wrote a 3D bin packing algorithm but I am still not sure if it is correct or not. I did not follow any code or pseudo-code that's why I would like to know if it is an efficient algorithm for the 3D bin packing problem or not. each container has a length, height and breadth each item has a l...

java performance algorithm

0

Q: Displaying a String array in tabular format

I have an array of strings called theArray. All strings in theArray are of length 20. I wish to display this array in tabular format to view the clustering of a hashing function. This code works, however, it looks horrible. Is there a better way to create tables? for (int i = 0; i < array...

java formatting hash-table

0

A: Generic matrix in Java supporting arbitrary rotations in constant time

I took a look at the way you handle negative rotations... and you seem to just negate the value, and then pass it to its opposite function. Which is a pretty clever idea. Except that there is one case in which it doesn't work. System.out.println(Integer.MAX_VALUE); System.out.println(-I...

@EasterlyIrk No, that's a ram.

@EasterlyIrk pls don't do that

@EasterlyIrk cough

2:16 PM

sowee

Did you know that in Java, Integer.MIN_VALUE and -Integer.MIN_VALUE are the same?

yes

(probably in various other languages too)

@EasterlyIrk gist.github.com/Phrancis/52f5c301aa2725e944a667e2ecc662ff

well that's why you're not allowed to just -argument to flip it from negative to positive

2:17 PM

@Pimgd I don't know many languages which even have such a function, so I wouldn't know.

> Created 22 seconds ago

@EthanBierlein No, it stays negative.

nvm

I read that wrong

ideone.com/76gI8s

That is an odd behavior though.

I wonder if it's a bug.

2:18 PM

^^

Don't use Java, JAVA, or PHP.

it's not a bug, it's because bits

Apparently I left this open overnight.

but I don't know the full explanation off the top of my head

@EBrown this chat?

@EasterlyIrk Yeah...lol

2:20 PM

Or xkcd?

I had both open overnight.

19

A: Java Integers Min_Value negative then compare

Because of silent integer overflow: Integer.MIN_VALUE is -2^31 and Integer.MAX_VALUE is 2^31-1, so -Integer.MIN_VALUE is 2^31, which is Integer.MAX_VALUE + 1, which by definition is too large for an integer. So it overflows and becomes Integer.MIN_VALUE... You can also check that: System.out.pr...

I had 2 PPCG posts, xkcd garden, this chat and TNB, and 2 posts on CR.

@ Kevin Esche oh I did not know that site exists! sorry, I will post my question there. And do you have another website for code reviewing (except the one you posted) ? thank you! — AIR 11 secs ago

oh and r/nethack.

the answer is actually relevant, the question only kinda-so

2:21 PM

@Pimgd Aha, that's why.

Back in a bit, gotta go to Taco Bell and get food.

IN N OUT FOR LIFE!!

but okay bai

We don't have those here.

@EasterlyIrk

There's an In-N-Out going up about a mile from my home actually.

I pinged you.

2:22 PM

It's strange too, because I live in Minnesota.

For absolutely no reason.

Do I win?

That's about the last place I'd expect one to be going up.

@EthanBierlein No kidding.

@EBrown yes sorry

I live in a tiny town in Ohio, not likely that we'll see one any time soon.

2:22 PM

@EBrown no

:(

In fact, it's going up right on top of an old Shell Gas station, which is even stranger.

I don't have either of those in Australia. or Burger King

What do you have in Australia?

@EBrown 3 more and you get a ~~goat~~ cookie.

2:23 PM

@Quill But, you do have kangaroos.

^^^

@EasterlyIrk No time for that.

KANGABURGER!

It's Taco Bell time.

What I do have is the KangaFlu at the moment

2:23 PM

@EBrown YOu can have both anyway, bai.

@Quill Is that like a normal flu?

it's an australian flu

@Quill Doesn't Australia have a bunch of creatures that constantly try to kill you?

2

But is it identical in most respects?

^^

that concept applies globally, but hey, sure why not

(Which isn't always a bad thing, mind you.)

2:24 PM

how isn't that a bad thing

giant spiders are always a bad thing

@Quill Easy hunting.

I always wanted to visit Australia.

@EthanBierlein unless you need lots of spider silk

The problem is it's like a 9,000,000 hour flight.

And that's just too far for me.

DUDE GO TO TACO BELL!

2

2:25 PM

@EBrown China is only 10 hours from here, so Australia will at most be 15 if you take a direct flight.

inb4 biologist complaining about how small spiders make strongest spiderwebs

Alright, now seriously, out of here. Be back in like an hour+.

bai

get gut burger

@EBrown 1027 years?

yes

2:26 PM

I'll still be in the room, so feel free to ping the snot out of me.

Interesting story about fast food chains though:

(The noise annoys the other people in my house.)

@EBrown

@EBrown does you has cats?

@EBrown will you answer my questions when you comes back?

Trademarks aren't global, so ninja-smart people can register brand names in other countries, like Burger King or whatever

ooh

2:27 PM

then the companies have to pay big bucks to buy the trademark off you when they want to expand

Topic is all over the place right now - FYI

@Quill so, like patent trolling

yeah

You guys have such a more on-topic room then us.

Kill more zombies.

2:36 PM

it's a good thing I'm a programmer and not an electrical engineer - I just wired my functions together in the wrong way (showfooter hides the footer, hidefooter shows the footer)

2

@EasterlyIrk TS, for irony if nothing else.

What's everyone doing?

Cus I'm doing this.

user image

eating an avocado and reading chat

avocad = good
avocado = not quite as good as avocad

@DanPantry stop screwing ~~around with~~ your food

;-)

2:43 PM

I just submitted my examination project. :S

And now it's back to Swift I suppose.

:(

Captain Obvious

0

Q: The Boyer-Moore Majority Vote Algorithm

I have started learning Java recently and was looking into some easy algorithms. I found the Boyer Moore voting algorithm here Boyer Moore Voting Algorithms I am trying to get better at writing good code for my solutions. Please give me your suggestions. import java.util.Scanner; public class ...

wow the websockets connection into chat is weird

You are reading this from the se-chat-terminal thing?

ohai @LiquidPenguin

@Pimgd I accidentally wired a transistor the wrong way this morning. Luckily those survive it if you don't do anything too stupid.

I felt really stupid.

2:47 PM

Like eat them?

@EasterlyIrk
Hello. mortal

:(

@EasterlyIrk kinda, I was just reading the pure socket events

@DanPantry deleting rows :)

@Quill Does the oneboxed question look weird, or just in general

2:49 PM

it comes through as HTML

which makes it really annoying in a non-browser environment

yeah, that does look stupid.

and the delete message prints it all over again.

yeah, that was kinda by choice tho

I think I added a config option to turn that off

epic link:

pub.ist.ac.at/~edels/hexasphere

If you want to see what I mean when I say "the websockets data is weird", paste this into your console:

var socket, url;
function connect() {
    $.post('/ws-auth', fkey({roomid: Number(/\d+/.exec(location)[0])})).done(function (data) {
        url = data.url;
        poll();
    });
}
function poll() {
    socket = new WebSocket(url + '?l=' + Date.now());
    socket.onmessage = function (response) { console.log(JSON.parse(response.data)) };
}
connect();

that won't do anything on its own surely

@Quill forgot to post connect()...

and yeah that's sorta weird

looks like each key corresponds to r${roomId}

2:53 PM

it sends empty events through

1

A: Struct implementation of immutable Maybe<T> monad

Your code formatting is mind-blowing. It is so unconventional, that it looks chaotic (even though there is probably a system to it). I had a really hard time reviewing it, even though the business logic itself is fairly simple. I think you should use common .Net coding style, if you want to share...

needs ♥

it sends an event when a new message is received, so I guess it then goes off and grabs the new message. weird

> Your code formatting is mind-blowing. It is so unconventional, that it looks chaotic

lol

^

my answer actually expands on that one point

but Nikita's answer is awesome (as always)

That just reminds me of that comment that someone posted that went along the lines of

2:55 PM

I like how it ends with a one-liner implementation that mootinates the whole OP's code

"Wow, for every good choice you made you threw in two bad ones!"

Captain Obvious

0

Q: Making a multiplayer game using socketserver. Need help optimizing UDP server

I am making a multiplayer platforming game, and currently there are server performance issues once I have about 7+ clients connected. I was told earlier last week that I should investigate socketserver since previously I had been writing my own server using merely socket. Well, after 6 hours of ...

haha that was 200

> What a fascinating solution! It seems that for every smart decision you made, you also threw in a poor decision or two.

15

A: Wow that's a big integer! What's its largest prime factor?

What a fascinating solution! It seems that for every smart decision you made, you also threw in a poor decision or two. Smart decision: In PrimeFactors(), you start testing divisors from small to large, rather than large to small. Poor decision: You used if (IsFactor(number,divisor) … rather t...

lulz

2:56 PM

^

I wish there were more "fun" reviews like that sometimes

^

> the whitespace you had was like a gigantic flashing neon arrow sign saying "LOOK!! THIS IS A NEGATION!!" ...I mean, come on.

I try :)

@DanPantry most of the "fun" ones sound a lot like insults

@Quill Yeah, it's a balance that has to be struck

2:58 PM

passive-aggressive

I'm not passive aggressive, unlike some people

/s

^^

@EasterlyIrk I like how you felt you had written ^ too many times in a row so this time you wrote two in the same message

^^

@DanPantry I think @Mat'sMug used that in the first review I got on CR. Might've been @RubberDuck instead.

« first day (1067 days earlier) ← previous day next day → last day (2935 days later) »

Transcript for

Apr '165

The 2nd Monitor

General discussion about codereview.stackexchange.com - Welcom...

addicted-to-cr here-be-pedants just-saying-hi monkey-business my-code-is-compiling nice-people-room

join this room
about this room

00:00

06:00

12:00

18:00

all times are UTC

site design / logo © 2024 Stack Exchange Inc; legal

mobile