The Nineteenth Byte

HyperNeutrino

20:10

@cairdcoinheringaahing s/has/have/? I know the English is intentionally bad but I think it's have in the official video.

caird coinheringaahing

@HyperNeutrino Think about this counter argument: does it matter?

:P

HyperNeutrino

oh snap can't argue with that logic

:P

AdmBorkBork

You know what's sad about eating a cookie? Running out of cookie.

HyperNeutrino

but no ofc not I'm just picky with basic grammar (of course capitalization and not using short-forms is for old-school people, this is the internet :P)

@AdmBorkBork or running over cookie

caird coinheringaahing

@AdmBorkBork Or not having a biscuit

AdmBorkBork

20:13

I live in the US, a biscuit is something very different.

caird coinheringaahing

@AdmBorkBork biscuit = scone?

DrMcMoylex

@cairdcoinheringaahing Scone is something completely different

caird coinheringaahing

Ugh, I can't keep up with Americanisms. What is a biscuit, scone and cookie to you guys?

AdmBorkBork

No, a biscuit here is a type of quick-bread. Soft and leavened, sometimes flaky.

DrMcMoylex

@cairdcoinheringaahing Biscuit, Cookie, scone

Adám

20:15

codegolf.meta.stackexchange.com/a/11925/43319 says that for Python, A function submission may include helper code outside the function, for example import re;r=range;lambda l: ... Shouldn't we then allow the same for APL?

DrMcMoylex

Scone is a sweet breakfast pastry

caird coinheringaahing

@DrMcMoylex In English, that's a scone, biscuit and a blueberry scone

@Adám Yes, don't we?

DrMcMoylex

@cairdcoinheringaahing Last time I checked, I'm pretty sure I'm speaking English as well...

:P

Adám

@cairdcoinheringaahing So far, I've shied away from doing so. But I think it is fair if Python can.

DrMcMoylex

But if that's the case, then yeah in the US a biscuit is like a UK scone

Adám

20:17

@cairdcoinheringaahing I'll add it to my APL post there.

DrMcMoylex

In the US, the difference between a biscuit and a scone is that a scone is less flaky and way sweeter. Typically only a breakfast thing too

caird coinheringaahing

@DrMcMoylex I genuinely refer to the language you guys call English as "American" or "American English" :P

DrMcMoylex

@cairdcoinheringaahing Wait, so what is a cookie?

caird coinheringaahing

@DrMcMoylex As in what do we think when someone says cookie?

AdmBorkBork

Biscuits are usually served with meals, not eaten separately like a scone.

DrMcMoylex

20:18

@cairdcoinheringaahing Yeah

@AdmBorkBork Like biscuits and gravy... mmmhmmmm

I love biscuits and gravy

caird coinheringaahing

We usually think they're American. There's no such thing as a cookie (in England)

AdmBorkBork

I could have a scone with a cup of tea or coffee in the afternoon, but I wouldn't have a biscuit with that. (Ignore for the moment that I dislike hot beverages)

DrMcMoylex

Huh

caird coinheringaahing

Same way that you guys don't have trousers

4

That sounds really weird :P

AdmBorkBork

Sure we do. They're just normally called pants.

DrMcMoylex

20:20

Caird just assumes that all of us uncultured Americans run around without pants all the time :P

@cairdcoinheringaahing Out of context quote of the day lol

AdmBorkBork

Pretty sure we don't have jumpers, though.

caird coinheringaahing

@AdmBorkBork Exactly the same here, but with cookies and biscuits

DrMcMoylex

@AdmBorkBork I'm not sure what jumpers are.

I think of cables

caird coinheringaahing

Sweaters (is what jumpers are)

AdmBorkBork

Trousers is usually more formal. Like, a suit would have trousers, but jeans would be pants.

@DrMcMoylex Sweater / sweatshirt.

DrMcMoylex

20:22

TIL

caird coinheringaahing

If we say "I'm not wearing any pants", it means you're going commando, whereas you guys think of someone running around in underwear?

DrMcMoylex

Yeah

Adám

TIL that APL functions can return functions as result.

DrMcMoylex

I think it's fascinating how two extremely similar yet different languages evolved. And in like 99% of cases, they're the same. But that 1% is really interesting

caird coinheringaahing

Honestly, 99% of all American that I know is from Family Guy, and 1% from visits to Utah, NYC and Seattle :P

Adám

20:25

Walk on this sidewalk, after three blocks, go through the tunnel to the subway, and take the Circle line counterclockwise to the railroad station (it stops there). Or you can just borrow my cell and call for a station wagon.
Walk on this pavement, after three estates, go through the subway to the underground and take the Circle line anticlockwise to the railway station (it calls there). Or you can just borrow my mobile and call for an estate car.

caird coinheringaahing

@Adám For the second one, s/estate car/black cab/

HyperNeutrino

I was working on a chat client and I broke my test account lol

now I have to restart the server xD (takes me about 4 keystrokes so I don't rly care)

Adám

@cairdcoinheringaahing You can have a black cab in the US too, it just doesn't mean a black cab.

caird coinheringaahing

@Adám What does it mean?

DrMcMoylex

@Adám Assuming the first one is AME, I'd say just borrow my phone and call a Taxi

Adám

20:27

@cairdcoinheringaahing a taxi which is painted black.

DrMcMoylex

Cell works, but it's less common. I have never heard station wagon before

Adám

@DrMcMoylex I know, but I wanted to put in as many differences as I could. Contrived example, of course.

DrMcMoylex

But Phone and Taxi are still different

AdmBorkBork

@DrMcMoylex Station wagon is what a five-door hatchback is called.

caird coinheringaahing

Can an American tell me why there's such a complaint against gay marriage?

DrMcMoylex

20:29

@AdmBorkBork ... Well I know that, but why would you call one like a taxi?

ATaco

Just a reminder that Australia isn’t the only place with strange slang...

Adám

@DrMcMoylex Really? When I lived in NY, people would often ask if I had a cell, ask for my cell number, tell me to call on their cell, say "I'm on my cell", etc.

AdmBorkBork

@DrMcMoylex Right, you wouldn't.

DrMcMoylex

@Adám Could easily be a regional thing.

NY and Colorado speak differently, but the differences would be more subtle then BRE/AME

HyperNeutrino

I am Canadian, is that close enough? And the reason is because some people are way too conservative. I don't know. My parents are extremely anti-gay (they were not raised here, I don't know if that makes a difference), but the society here is extremely supportive of it. Some people might be against it for religious reasons? I'm not quite sure.

caird coinheringaahing

20:30

@HyperNeutrino Canada is close enough :P

ATaco

The majority of Australians recently voted yes for it, I’m proud of this country

HyperNeutrino

ok :P I mean half of our culture comes from America and the other half comes from polar bears and moose

caird coinheringaahing

Also, as far as I know, there's nothing in the Bible that bans gay marriage

AdmBorkBork

@DrMcMoylex Yeah, regional things are very common. Ask people what a "bubbler" is and you'll get blank stares in most places and "that thing at the park you drink water from" in Wisconsin.

caird coinheringaahing

@HyperNeutrino And France, given that half the country speaks the language?

ATaco

20:32

We just called ‘em “Drinking Taps” or “The Taps”

HyperNeutrino

IIRC, nothing explicitly forbids it, but there is a thing about a family having to have a mother, a father, and children, but I don't think anything bans it.

caird coinheringaahing

Huh, I just realised I don't know my own county's stance on gay marriage

DrMcMoylex

@cairdcoinheringaahing 1) The US isn't that opposed to gay marriage, but lots of its residents are. But it's federally approved now, so I don't know why you assume that the US is entirely opposed. 2) I'd assume the people that oppose it do for the exact same reason anyone in any other country opposes it. Most likely religious reasons, but who knows?

@AdmBorkBork That's hilarious

HyperNeutrino

@cairdcoinheringaahing Sure, France, Britain, all the major superpowers who used to own this country :P and Quebec isn't that large and not that many people outside of QC speak the language :P

DrMcMoylex

FWIW, I'd call that a drinking fountain or water fountain

HyperNeutrino

20:33

wait I just realized that what counts as being able to "speak" the language is ambiguous

ATaco

Also the term “Taps” probably sounds weird to people who only call taps Faucets

caird coinheringaahing

@DrMcMoylex I don't think that most or all the country is against it, but it is quite well-known that it's a controversial topic there

ATaco

63% of Australians said yes 🎉

DrMcMoylex

That's just because ~15~ years ago, it was pretty unpopular, and recently there's been a radical shift in public opinion, not to mention that it was federally legalized recently(ish)

caird coinheringaahing

Do people across the pond know who Nigel Farage/UKIP is?

DrMcMoylex

20:35

I don't

AdmBorkBork

I've heard of UKIP - that's a political party in England

Wheat Wizard

I have heard of both of them.

caird coinheringaahing

@AdmBorkBork Nigel Farage is the leader of UKIP

Also \o/ gay marriage is legal in the UK \o/

muddyfish

Boo ukip

DrMcMoylex

@AdmBorkBork Wisconsin also has a really entertaining accent (IMO)

AdmBorkBork

20:39

Oh accents are something totally different, doncha know.

DrMcMoylex

Haha, I can hear it even over text

caird coinheringaahing

Well, I found a list of countries I'm never going to live in

DrMcMoylex

OK, random question, but this is something my friends have been discussing recently: How do you pronounce Colorado?

Wheat Wizard

What are the dotted lines in chat? I always see them but I've never known what they are.

DrMcMoylex

I guess technically, the 'uh' is a schwa, but I didn't feel like copying it

Adám

20:41

@cairdcoinheringaahing According to the Bible, marriage is something between a man and a woman. The phrase is ki yikach ish isha which means when a man takes a woman. It doesn't ban gay marriage, it just doesn't consider it marriage. Also the Bible does not prohibit homosexuality. It only prohibits male-male intercourse.

HyperNeutrino

@WheatWizard It's where SE chat thinks you've read up until (so anything after the dots would be new messages as far as SE chat thinks)

DrMcMoylex

@WheatWizard Oh, I actually know the answer! It shows the last thing you read

^^

Wheat Wizard

Why are there three then?

and why are they always wrong

HyperNeutrino

well SE can't really tell where you've read up until and I think it's just buggy overall. Also, the last 4 messages didn't have dots before them even though this window was unfocused (but still visible because the window in front of it wasn't maximized)

Wheat Wizard

@DrMcMoylex Option not listed: Cholera Dough

DrMcMoylex

20:43

As in, Coe-LAIR-uh-doe?

Adám

@DrMcMoylex Or color-a-DOE.

caird coinheringaahing

@DrMcMoylex It's very clearly "co" (as in co-dependant) "low-ray-doo" :P

HyperNeutrino

Is Cholera meant to be "coe-lair-a/uh" or "col(umn)-ur-a/uh"?

(the (umn) is just to indicate how "col" is pronounced in this case)

DrMcMoylex

@Adám But is that 'a' like 'cat', or 'a' like 'call'?

Adám

@DrMcMoylex Like to paint an antelope.

AdmBorkBork

20:45

Call-or-ad-doe

HyperNeutrino

@Adám so "a" as in "uh" or "ay"?

DrMcMoylex

@Adám Thanks, that's very helpful :P

Adám

@HyperNeutrino uh

caird coinheringaahing

Is there John Lewis (the shop) in America?

Adám

Maybe it is call or aDOO?

Mr. Xcoder

20:46

@cairdcoinheringaahing At first glance, without context, that sounded really weird

HyperNeutrino

wait should "a" (on its own) be "uh" or "ay"? or does it depend?

@Mr.Xcoder starboard's lack of context is wonderful for messages like this :P

DrMcMoylex

@HyperNeutrino I usually say 'uh', but if I I'm referring to the word 'a' itself, I'll say "ay"

Adám

@HyperNeutrino Ay, if talking about the letter.

HyperNeutrino

Whoops, I meant as an article.

AdmBorkBork

@HyperNeutrino Depends upon the next sound.

HyperNeutrino

20:48

ah ok, what I thought. what does it depend on though?

Adám

@HyperNeutrino an

Mr. Xcoder

ಠ_ಠ Wastes 15 minutes of their lives debugging -- An identifier was "Cell", not "cell" ARGH!

HyperNeutrino

I think I tend to use "ay" when the next sound is an emphasized one (so "uh - computer" but "ay - binder")

@Mr.Xcoder use a language with case-insensitive identifiers :P

AdmBorkBork

@HyperNeutrino If there's a hard consonant, like a t or d, I would say "ay" ... "ay toad" or "ay door"

HyperNeutrino

banned from the internet forever

@AdmBorkBork hm interesting

I really can't find a rule to which one I pick, I just go with whichever one comes to mind first :P usually I follow the rule I gave but not always

Mr. Xcoder

20:50

@HyperNeutrino ... This is the only language that serves my current purpose

HyperNeutrino

@Mr.Xcoder oh ok rip. what language are you currently using?

DrMcMoylex

@Mr.Xcoder I wasted probably 2 hours trying to figure out why something was segfaulting, and it turns out I needed to remove a _.

Mr. Xcoder

Swift (I will never use OBJECTIVE-C!!)

HyperNeutrino

ah ok

I once wasted at least 30 minutes trying to figure out something and then I realized that it was because I didn't change the variable name after copy-pasting :P

AdmBorkBork

@DrMcMoylex an

DrMcMoylex

20:52

Meh

Mr. Xcoder

Ugh oh Apple has made a terrible design choice for Table Views... The TableViewController comes with some standard code, and if you try to modify the contents of a cell you get nil exceptions, because of a line that should be deleted from the initial template facepalm took me 5 mins to figure out

Stewie Griffin

I spent one and a half week troubleshooting a power system model that didn't behave as I expected. I finally contacted the company producing the software yesterday. Got an answer today: "Yes, the IEEE standards were updated, and we misunderstood them. It doesn't work in this release, but it will be fixed when we launch the new release next summer.

Mr. Xcoder

@StewieGriffin Lol, facedesk huh?

Adám

@Mr.Xcoder Last year our conference registration system fell over when I signed up with my wife because someone had written spouce instead of spouse.

caird coinheringaahing

I'm guessing more facecomputer :P

New Main Posts

20:55

1

Q: Simple markdown rendering

There are several ways to create headers on posts on the Stack Exchange network. The format that's most commonly1 used on PPCG seems to be: # Level one header ## Level two header ### Level three header Note the space after the hash marks. Also, note that trailing hash marks are not included. ...

-1

Q: Packing Density of Polyline Defined Shapes

So... I was making bacon this morning and I couldn't fit all of my bacon into my pan. However I oriented the strips, there was always one or two pieces that didn't fit. Culinary endeavors aside, here's my challenge: Input: pan and bacon Any occurrences of these strings in your program should be...

code-golf packing

Stewie Griffin

computerfloor

DrMcMoylex

@cairdcoinheringaahing or computerwindow

Mr. Xcoder

@StewieGriffin You must be somewhat reach to afford that :P

Adám

Guys, the infallible Unicode consortium has standardised that to facepalm: 🤦

Stewie Griffin

Well, the hours lost troubleshooting that problem cost way way way more than the computer I worked on.

caird coinheringaahing

20:57

@Adám I can't see that 🤦

Adám

The new 1337 way of saying facepalm is U+1F926.

… and then he had just forgotten to plug in the computer. 1F926!

@cairdcoinheringaahing emojipedia.org/face-palm

FrownyFrog

2

A: Basic ASCII Tallies

J, 50 48 45 35 bytes 1|:_50[\'|/ '{~[{.(|.2,=i.4)$~]-5|] Try it online!

mınxomaτ

@Adám Oh, a bunch of white rectangles

FrownyFrog

I beat Jelly :D

Mr. Xcoder

@FrownyFrog No way Jellyers can let that happen!

Adám

21:02

@mınxomaτ Can't you see the images if you scroll down?

Marcus Andrews

Is there a shorter alternative to .round() in Ruby?

HyperNeutrino

Jelly was beaten? :o Dennis will be summoned and outgolf you by 8 orders of magnitude

grr, you're winning by 3 bytes. must not lose golf battle :P

hey I already found 1 free byte

Marcus Andrews

p (1.0*numerator/denominator).round

can be this shortened? (ignore var names)

trying to round the fraction to nearest int

i.e. not floor division

right now I use 1.0 to force float then .round() to round but :/

caird coinheringaahing

floor(x+0.5) may save bytes (don't know what it would be in ruby)

Mr. Xcoder

@HyperNeutrino You use list literals...? In Jelly

HyperNeutrino

21:06

I can't think of a better way :P

Marcus Andrews

I think that would make it longer

I have to keep the fraction in float form before converting

unless there's a rounding shortcut but I can't think of one

i.e. I don't think I can just stick .5 in the numerator for instance

HyperNeutrino

oh you don't have a fraction, instead you have the num/denom?

caird coinheringaahing

@Mr.Xcoder Using W is longer. I tried

Mr. Xcoder

I still believe [“|||/”] is golfable, not sure how though

Marcus Andrews

as in I have two integers, numerator and denominator

and I need to compute the rounded integer division

i.e. not truncated division

in which case i would have just done numerator/denominator

caird coinheringaahing

21:09

CMP (NSFW)

Poke

if you're trying to do rounded integer division why do you need the result as a float

Mr. Xcoder

@cairdcoinheringaahing Eugh!

DrMcMoylex

@cairdcoinheringaahing That is not what I was expecting to click on

Also, you left out an option for I'm a female

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Packing Density of Polyline Defined Shapes So... I was making bacon this morning and I couldn't fit all of my bacon into my pan. However I oriented the strips, there was always one or two pieces that didn't fit. Culinary endeavors aside, here's my challenge: Input: pan and bacon Each of these...

DrMcMoylex

(I'm not, just saying you forgot the option)

Marcus Andrews

21:11

@Poke In order to keep the fraction so I can round it

caird coinheringaahing

@DrMcMoylex You could just not answer it (or say No) :P

Marcus Andrews

unless you know of a better way?

if I just do numerator / denominator I'm flooring the division

DrMcMoylex

@cairdcoinheringaahing Yes, but a female answering no and a male answering no are two very different options

Also, I'd be shocked if anyone was willing to answer such a personal question in front of a bunch of random people on the internet

Poke

@DrMcMoylex it's anonymous

@MarcusAndrews after you round do you need to do anything or is that the answer

Marcus Andrews

that's just the answer

the integer representation of a / b rounded (not truncated)

my shortest approach right now is


p (1.0*a/b).round

Poke

21:15

you could try the string format operator %

Try it online!

may not even need the 0

HyperNeutrino

puts'%.f'%(1.0*6/7)
puts (1.0*6/7).round

AdmBorkBork

A byte's a byte.

Laikoni

Useless fact of the day: There are currently 8888 questions on main.

AdmBorkBork

@Laikoni More useless fact -- I was betting with myself whether I'd hit 20k or main would reach 8888 first. I lost.

caird coinheringaahing

@AdmBorkBork You got 20k a couple of hours ago, the latest question was asked 30 minutes ago. Although, you had to both win and lose :P

AdmBorkBork

21:24

Right. I had bet with myself that main would hit 8888 before I hit 20k.

Next goal: Beating DJ to Socratic.

caird coinheringaahing

@AdmBorkBork Good luck. I still don't have Curious :P

Marcus Andrews

@HyperNeutrino Does that work with p always?

*vs puts

DrMcMoylex

@AdmBorkBork Good luck :P

caird coinheringaahing

@DrMcMoylex Why is your parent site English Language?

Erik the Outgolfer

because that's where he's called "DrMcMoylex" I think...and that's ELL btw

AdmBorkBork

21:27

@DrMcMoylex Pshaw, easy-peasy lemon squeezy. You've been stuck at 96 for like forever.

HyperNeutrino

@MarcusAndrews I don't know Ruby :P

Marcus Andrews

how about this challenge: given a number, sum the even digits

Anonymous

@MarcusAndrews lambda s:sum(map(int,s[::2])) (takes input as a string)

Marcus Andrews

sorry, by even digits I mean the even-valued digits

e.g. 24556 -> 2+4+6

Anonymous

Oh

AdmBorkBork

21:31

@MarcusAndrews PowerShell, 40 bytes -- ([char[]]"$args"|?{!($_%2)})-join'+'|iex Try it online!

Anonymous

lambda s:sum(int(x)for x in s if int(x)%2<1)

caird coinheringaahing

5 bytes in Jelly: <digit><bit><filter (2 bytes><sum> (getting actual commands)

Erik the Outgolfer

lambda s:sum(int(i)for i in s if-~int(i)%2)

Anonymous

f=lambda n:n and-~(n%10)%2+f(n//10)or 0

Anonymous

Except I messed that up

Erik the Outgolfer

21:33

@Mego whoops :p that would count the odd digits :p

caird coinheringaahing

Jelly, 5 bytes: DḂÐḟS

Marcus Andrews

I think it's also longer (I'm also counting input/printing)

trying ruby too

as I think it's prob. shorter for this

Erik the Outgolfer

what server are you golfing in btw?

HyperNeutrino

f=lambda n:n and-~n%2*(n%10)+f(n//10) works I think

Erik the Outgolfer

or use python 2

f=lambda n:n and-~n%2*(n%10)+f(n/10)

HyperNeutrino

21:38

sure :P

f=n=>n?-~n%2*(n%10)+f(n//10):0 should work for Proton

omgwat something in Proton actually works? incredible!

Marcus Andrews

I think you can also remove the ()

f=lambda n:n and-~n%2*n%10+f(n/10)

but it's still the same size as the original XD

Erik the Outgolfer

@MarcusAndrews huh

what is the "original"

Marcus Andrews

python 3
s=input()
print(sum(int(i)for i in s if-~int(i)%2))

vs

python 2
f=lambda n:n and-~n%2*n%10+f(n/10)
print f(input())

both 52 char

print(sum(int(i)for i in input()if-~int(i)%2))

47

Anonymous

@MarcusAndrews The first one should be print(sum(int(i)for i in input()if-~int(i)%2)) for a full program

Anonymous

Ninja'd

Erik the Outgolfer

21:42

@MarcusAndrews that way you can do 46 in python 2

print sum(int(i)for i in input()if-~int(i)%2)

Marcus Andrews

ah

Erik the Outgolfer

or

Anonymous

I've been trying to come up with a clever exec solution, but I think it would be longer than the sum method

Erik the Outgolfer

print sum(-~int(i)%2*int(i)for i in input())

(45)

Marcus Andrews

The -~ thing is a +1 trick right?

HyperNeutrino

21:44

yes

Erik the Outgolfer

yes

Marcus Andrews

is there a - trick by chance?

HyperNeutrino

-~ for +1 and ~- for -1 because that way you can avoid brackets

Marcus Andrews

ninja'd

Erik the Outgolfer

@MarcusAndrews huh? isn't it just -?

Marcus Andrews

21:45

I meant a (n-1) trick

(sorry I wasn't being precise)

Erik the Outgolfer

then as hyper said above, ~-

HyperNeutrino

n-~n is n*2+1 or n+n+1

Erik the Outgolfer

note that ~x == -(x + 1) == -x - 1

Marcus Andrews

one of these days i've got to learn this two's complement stuff

Mr. Xcoder

Yay someone talks about bitwise :D

HyperNeutrino

21:46

just take the bits and flip them all

caird coinheringaahing

Why does ~ negate the number if it flips the bits?

Erik the Outgolfer

so -~= = --(x + 1) == x + 1

Marcus Andrews

like say I have the number x=7, or 111 in binary. Then ~x would be 000 and then taking the negative of that I believe is adding an extra bit to the start, making it 1000 or 8

(I'm prob. totally wrong on that tbh)

actually almost certain that's wrong, it shouldn't make it 0

Anonymous

Best I have with exec is 50: a=0;n=input();exec"a+=-~n%2*n%10;n/=10;"*n;print a

Mr. Xcoder

@Mego For what?

Anonymous

21:50

@MarcusAndrews 7 is 0111 (implied sign bit for two's complement). ~7 is 1000, which is -8.

Mr. Xcoder

Leading ones instead of leading zeros basically

Marcus Andrews

Does ~ always go one extra bit beyond the most significant bit?

and if I have 1000 as binary how does it know if I mean 8 or -8?

Erik the Outgolfer

@cairdcoinheringaahing first xmas add in greece: november 11

Anonymous

@MarcusAndrews Yes and no. floor(log2(7)) = 3, but you need an extra bit for a sign in two's complement, so 7 is 4 bits: 0111.

Mr. Xcoder

Yay none here yet (Xmas ads)! \o/

Marcus Andrews

21:51

i guess that's what I never quite understood about how signed and unsigned handle things -- I guess it's in the implementation of the data type, but then when dealing with python, I'm not sureyet

Anonymous

@MarcusAndrews Because the leading bit is the sign bit

caird coinheringaahing

@EriktheOutgolfer The John Lewis Christmas ad came out last week, which is kinda the indicator that it's "Christmas" time

Marcus Andrews

so if I were dealing with a signed data type then the MSB is always the sign bit?

and if unsigned data type then the whole thing is just implicitly positive and we get another magnitude of 2

Erik the Outgolfer

python doesn't have "unsigned"

Anonymous

I think your confusion stems from the facts that Python (mostly) hides the yucky bitwise mechanics from you, that Python seamlessly shifts from fixed-width ints to arbitrary-width ints, and that Python ignores leading zeroes but still makes the sign bit significant, since there are no unsigned ints.

Anonymous

21:53

@MarcusAndrews Basically, yes. That's how it works in languages close to the metal, like C.

Erik the Outgolfer

python has arbitrary precision in both directions

Marcus Andrews

right

I assume python is inherently "signed" (to whatever extent the definition applies)

Anonymous

In two's complement in C, int8_t has the range [-2**7, 2**7-1]. uint8_t has the range [0, 2**8-1].

Mr. Xcoder

I have 45: print sum(int(f)for f in input()if~int(f)%2)

Anonymous

@MarcusAndrews Yes - all Python ints are represented using signed two's complement, so you have to account for the sign bit when doing bitwise manipulation.

Anonymous

21:55

Nvm I see the diff

Mr. Xcoder

Yeah slightly different then

Anonymous

Yeah, the -~ isn't really necessary, since x%2 is always 0 or 1 - just straight up flipping is sufficient

Erik the Outgolfer

that can get to 44 with mine then

Marcus Andrews

44?

Mr. Xcoder

bytes...

Erik the Outgolfer

21:56

print sum(~int(i)%2*int(i)for i in input())

Anonymous

And 49 with exec

Marcus Andrews

ahh

Mr. Xcoder

I just ported Erik's to print sum(~int(f)%2*int(f)for f in input()) (but now it's identical)

Anonymous

On a completely unrelated note, we don't seem to have a challenge just for finding the eigenvalues (with multiplicity) of a square matrix

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