The Nineteenth Byte

redstarcoder

22:00

oh yeah I just clicked into that

El'endia Starman

@EᴀsᴛᴇʀʟʏIʀᴋ Right. Using the matrix form is simply much more succinct.

Eᴀsᴛᴇʀʟʏ Iʀᴋ

but depending on the exact text of that challenge (haven't read too deeply), I might VTC it

@El'endiaStarman row == equation, you can multiply by scalars, I'm basically trying to solve by elimination but in row form not equation form

got it

redstarcoder

@EᴀsᴛᴇʀʟʏIʀᴋ I think I could get it covered. The one in question only has one answer, and would be much harder than the one I'm thinking of

flawr

@EᴀsᴛᴇʀʟʏIʀᴋ As an exercise try it also with a matrix that is not square / does not have full rank / does not have an unique solution.

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@redstarcoder true

@flawr ah, thanks

DJMcMayhem

22:02

TIL you can have GitHub activity automatically posted into a chatroom

Eᴀsᴛᴇʀʟʏ Iʀᴋ

^

redstarcoder

It's very nice

Gabriel Benamy

22:14

you know what's wild

I'm in my mid-20s and I'm gonna be training a company full of 40 and 50 year olds on how to use newfangled web software tomorrow

El'endia Starman

Good luck; don't die!

DJMcMayhem

@El'endiaStarman Thanks for clarifying that, but I don't really think it changes any of my points

El'endia Starman

@DJMcMayhem No, it doesn't.

Gabriel Benamy

@El'endiaStarman "this man died from talking about software" [x-files theme plays]

mulder: "have you ever heard of the computer aliens?"

mınxomaτ

@MartinEnder I see Beneficial Cucumber is trying to be the next Nicolas Cage.

Martin Ender

22:21

as in?

mınxomaτ

A Face/Off like overacting.

Eᴀsᴛᴇʀʟʏ Iʀᴋ

I have to say, benedict cumberpatch has the best name

trichoplax

I don't think that's his name...

(b instead of p)

Eᴀsᴛᴇʀʟʏ Iʀᴋ

ehhh I typoed the p but whatever

ninja'ed

Gabriel Benamy

Eᴀsᴛᴇʀʟʏ Iʀᴋ

22:23

stupid enter button

@GabrielBenamy o_O

mınxomaτ

I don't remember an episode with a young Rory.

DJMcMayhem

Bumberstump Coggleswort

Gabriel Benamy

@mınxomaτ Let's Kill Hitler

Eᴀsᴛᴇʀʟʏ Iʀᴋ

bennywiggle cucumberface?

mınxomaτ

@GabrielBenamy Oh right. That crap.

trichoplax

22:24

You don't like extreme retrofitting?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@mınxomaτ yes that crap

mınxomaτ

Some awesome characters introduced by half-assed writing.

Eᴀsᴛᴇʀʟʏ Iʀᴋ

> awesome

Gabriel Benamy

the robot that died instead of the doctor

mınxomaτ

I liked how the robot tied into the silence episode.

Jesus, the ninja is strong today.

Gabriel Benamy

22:25

it wasn't even pandorica it was the silence

mınxomaτ

Yes. I know. I'm tired.

Gabriel Benamy

lol it's okay

I really wish davies came back. He did some very good story arcs.

anyway it's 5:30 I should probably go home and sleep

Eᴀsᴛᴇʀʟʏ Iʀᴋ

night

I liked matt smith as the doctor, and the characters, but the storylines not as much as the new ones

specifically the underwater base two part episode

Gabriel Benamy

oh and btw

Destructible Watermelon

@GabrielBenamy Spoilers!

Eᴀsᴛᴇʀʟʏ Iʀᴋ

22:28

ye?

Gabriel Benamy

I managed to get a regex that finds an uppercase character followed by itself lowercase or a lowercase character followed by itself uppercase

I think we were talking about it yesterday

it uses one of the most bizarre features of regex I've ever used but idc

Martin Ender

(.)(?!\1)(?=(?i)\1)

?

only works in some flavours though

Gabriel Benamy

@MartinEnder does that match AA? Because it should only match aA and Aa

Martin Ender

no, the (?!\1) prevents AA

Destructible Watermelon

does it match 33 or something?

Martin Ender

22:30

oh right

just turn the . into [a-zA-Z]

actually no

it doesn't match 33

it can only match letters

Eᴀsᴛᴇʀʟʏ Iʀᴋ

what's the (?=(?i)\1) do?

Gabriel Benamy

wait what

Martin Ender

checks that the backreference works, but only after activating case-insensitive mode

Gabriel Benamy

oh my god

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@MartinEnder ahhh

Gabriel Benamy

22:31

that's genius

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@GabrielBenamy wtf was your solution then

Martin Ender

of course you'll need a . at the end if you want to include it in the match

Gabriel Benamy

(.)(??{uc$1eq$1?lc$1:uc$1})

Eᴀsᴛᴇʀʟʏ Iʀᴋ

o_O I like martin's better

Martin Ender

that looks perly

Gabriel Benamy

22:32

it is perly

Eᴀsᴛᴇʀʟʏ Iʀᴋ

^^

Destructible Watermelon

its great

Gabriel Benamy

I did it in perl, after all

Martin Ender

k, I don't know Perl

I can't tell whether mine works in Perl

but \1 matching case insensitively is definitely a thing in .NET

I know that it isn't a thing in all flavours though

Gabriel Benamy

(??{ ... }) executes the ... as code, and whatever it returns is treated as regex

Dada

22:32

yours work fine in Martin

*in Perl

Martin Ender

ummm

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@PythonMaster why the name change?

@GabrielBenamy that's not regex >_<

Destructible Watermelon

...

Eᴀsᴛᴇʀʟʏ Iʀᴋ

that's cheating

Destructible Watermelon

My nethack character got killed by a trapped chest

Gabriel Benamy

22:33

look,,, I'm trying

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@DestructibleWatermelon kek what dungeon level?

Destructible Watermelon

...

1

Eᴀsᴛᴇʀʟʏ Iʀᴋ

ouch

Destructible Watermelon

                             -------
                             |.x....
                             |..f..|
                             |...@..##     -----
                             -- ---- ####  |....
                                        ###...<|
                                           |...|
                                           -----

Eᴀsᴛᴇʀʟʏ Iʀᴋ

it's not as bad as the rock trap that kills you then your pet 2 turns in a row

redstarcoder

22:34

I'm horrible at nethack don't feel bad

Destructible Watermelon

You die...--More--

Eᴀsᴛᴇʀʟʏ Iʀᴋ

in the same room as the upstair

redstarcoder

It took me 2 hours to get into the game

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@redstarcoder lol everybody is but the knob and lynn

Destructible Watermelon

the worst part is that I started this game like two days ago

Gabriel Benamy

22:34

anyway thank you martin you just saved me 8 bytes on a challenge that hasn't been posted yet

Eᴀsᴛᴇʀʟʏ Iʀᴋ

rn my monk is paused at sokoban, just finished it

@GabrielBenamy o_O lol

redstarcoder

@EᴀsᴛᴇʀʟʏIʀᴋ makes me feel a little better haha

Destructible Watermelon

I've gotten down to the mines a couple times

Eᴀsᴛᴇʀʟʏ Iʀᴋ

Q is pretty good, I generally ask him for help

@DestructibleWatermelon protip: ignore them. doubtful you'll make it to minetown if you try to go down them

Destructible Watermelon

...?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

22:35

the mines

Martin Ender

@GabrielBenamy send me a link when you post the answer :)

Destructible Watermelon

how else do I go down a level

Eᴀsᴛᴇʀʟʏ Iʀᴋ

there are 2 downstairs on the level where you enter the mines

Gabriel Benamy

@MartinEnder Wait, does your regex match both characters, or just the first?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

1 is to the mines, 1 is continueing in the main dungeon

Destructible Watermelon

22:36

oh

oh that makes more sense

Martin Ender

@GabrielBenamy just the first. "of course you'll need a . at the end if you want to include it in the match"

Gabriel Benamy

or can I just drop the lookahead part?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@MartinEnder unfreeze?

Destructible Watermelon

some games of nethack I've played

  1        894  DanielSpre-Wiz-Gno-Fem-Neu died in The Gnomish Mines
                on level 4.  Killed by a fox, while fainted from lack
                of food.                                                -  [26]

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@DestructibleWatermelon ^ jion me there

Martin Ender

22:37

@GabrielBenamy oh sure, if you don't care about (?i) being active afterwards

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@DestructibleWatermelon ah, you're going gnomish healer?

Martin Ender

(.)(?!\1)(?i)\1

Gabriel Benamy

nah, I don't use /g being set

Destructible Watermelon

@EᴀsᴛᴇʀʟʏIʀᴋ I have not

Gabriel Benamy

cuz it's stuck inside a { .. && redo}

Destructible Watermelon

22:37

 13         21  DanielSpre-Rog-Orc-Fem-Cha escaped the dungeon
                [max level 1].                                         11  [11]

the soul survivor

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@DestructibleWatermelon wait random?

@DestructibleWatermelon >_<

Gabriel Benamy

ok, 12 characters now

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@DestructibleWatermelon generally gnomish female healer is used for pacifist conduct, i.e. kill nobody the whole game

Gabriel Benamy

I'll send you a link when I do post it :P

Destructible Watermelon

  2        552  DanielSpre-Sam-Hum-Mal-Law died in The Dungeons of
                Doom on level 3 [max 4].  Killed by a wand, while
                helpless, while fainted from lack of food.              -  [30]

I don't know how I got killed by a wand

Eᴀsᴛᴇʀʟʏ Iʀᴋ

22:39

monster zapped you

join me in the nethack room?

Dada

@MartinEnder you don't have \pL with .NET ?

(or is it just you didn't thought about it at first?)

Martin Ender

I don't think so, but I'm not very familiar with the Unicode classes

and if it does have it, then it'll probably match non-ASCII letters, so I usually avoid them unless I know I'm dealing with Unicode input

actually, .NET does have it, but I think you'd need \p{L}

redstarcoder

@EᴀsᴛᴇʀʟʏIʀᴋ where?

Martin Ender

might keep that in mind for golfing though when there's guaranteed to be only ASCII input.

Dada

Indeed, I didn't thought of it but there might be some troubles with non-ASCII letters... (I'm not very familiar with unicode clases either, but the \pL is often useful :) )

Acutally in Perl you need the braces \p{L} for classes that have more than one letter in their name, \p{Ll} for instance (which matches lowercase letters)

and when there is only one character, you can omit then

Martin Ender

22:44

System.ArgumentException: parsing "\pL" - Incomplete \p{X} character escape.

Dada

Sad...

Martin Ender

this must be the first time I've saved 5 bytes in a code golf by turning my answer into a named function with a 9-byte-long name.

trichoplax

@PhiNotPi saw this and thought of you:

I'm sorry. Phi is one h of a lot cooler than pi — not store bought dirt 6 hours ago

2

Eᴀsᴛᴇʀʟʏ Iʀᴋ

btw @flawr think I get row-echelon form now, attempting to write a julia program to convert a matrix to that for practice

Dada

I was looking for an answer of Ton Hospel to nominate for the "Rookie of the year (answer)" (as he is probably (by far?) the best Perl golfer of PPCG), anyone has an idea of which of each answer that should be? this one maybe?

Anthony Pham

22:50

@EᴀsᴛᴇʀʟʏIʀᴋ Well, I just read Jon Skeet's article on choosing usernames and based on his tips and my very own opinion, I decided to use my actual name

Eᴀsᴛᴇʀʟʏ Iʀᴋ

ah, okay

flawr

@EᴀsᴛᴇʀʟʏIʀᴋ great, then you'll know whether you really understood it:)

Eᴀsᴛᴇʀʟʏ Iʀᴋ

yep!

@Dada he was the original golfer

flawr

@AnthonyPham which article?

Dada

Didn't know there were an "original golfer" :o (I knew he had been golfing since before I even had a computer though).
But he only joined PPCG this year (if I'm not mistaken

DJMcMayhem

23:02

@Dada yup. "Member for 10 months"

LegionMammal978

Scheduled restart

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@Dada he's been a golfer on other forums, particularly perlmonks for a long time

> tfw you look at somebody's html, and it's completely unindented

> and apparently he was taught not to indent, just use line breaks

Dada

That I was aware of. I've seen some perlmonks post quoting golfings he wrote in 2003 I think ^^

Mitch Schwartz

Good golfing today, everyone. Keep up the good work

3

Luis Mendo

23:22

@Lynn Out of curiosity, where did you get the idea for the OVSF challenge? I work in mobile communications, and I use those codes a lot

PhiNotPi

@trichoplax I rate 21/13

trichoplax

:)

PhiNotPi

Speaking of which, I was recently wondering if the golden ratio would be useful in microwave design.

Because I noticed that microwaves heat food in an uneven pattern, created by a combination of interference patterns and the movement/rotation of the parts.

Interesting visual demonstration here: evilmadscientist.com/2011/…

trichoplax

23:37

Using golden rectangles for the base and sides to minimise the overlap of reflected waves?

PhiNotPi

Also, if I were to make a radial pattern (flower/rose shape) the golden ratio provides a really nice way of spacing the "petals."

trichoplax

Last time I bought a microwave it was reviewed as having unusually even heating. I suspect this is mostly because it doesn't appear to vent any of the steam produced during cooking, approximating a low pressure steamer

PhiNotPi

Imagine a bicycle wheel with spokes, with each consecutive spoke placed phi*pi radians away from the previous spoke. The use of the number phi allows the spokes to be somewhat evenly spaced, no matter their number.

Because phi is "the most irrational number" (consistently one of the worst rational approximations for any given denominator).

trichoplax

Vi Hart has a great video or 3 about this

PhiNotPi

There's probably a ton of videos on this.

trichoplax

23:49

Doodling in Math: Spirals, Fibonacci, and Being a Plant [1 of 3]

►

Conor O'Brien

@flawr you know haskell, correct?

Transcript for