The Nineteenth Byte

Poke

22:00

@Mr.Xcoder error

Martin Ender

Render the float's decimal representation in Comic Sans at 14pt and return the width in pixels

3

Poke

@MartinEnder /shudder

Mr. Xcoder

@MartinEnder I don't have enough underscores to express my disapproval with :P

DLosc

@Mr.Xcoder Depends. What does it do when given an int?

Mr. Xcoder

@DLosc It returns the number of digits.

I thought about returning the number of decimals for a float.

Pavel

22:10

Maybe length on numeric types should return the type's sizeof?

Mr. Xcoder

Or maybe just the whole length excluding the .

dzaima

@Mr.Xcoder length of it stringified. As to not break on integers converted to floats

DLosc

@Mr.Xcoder What does it do for negative integers?

Mr. Xcoder

@DLosc The number of digits of its absolute value.

DLosc

Ah, okay. Then as a user, I think I'd expect it to give the number of integer digits--i.e. len(float) === len(int(float))

So basically an integer base-10 logarithm.

Mr. Xcoder

22:14

Hm, that works too. Thanks

I implemented it as len(str(abs(int(item)))) :P

Poke

that's gross

Mr. Xcoder

Do it better then :)

Poke

16 mins ago, by Poke

@Mr.Xcoder error

Mr. Xcoder

raise TypeError("Incompatible Types") might be a better choice :P

quartata

math.ceil(math.log10(item))

Poke

22:17

i would also have it error for an int

Mr. Xcoder

Oh no I don't have math imported and am not planning to use it.

@Poke Nah, for integers I'll keep it that way. For floats, I made it error now.

Poke

🤢

quartata

@Mr.Xcoder is this golf?

Mr. Xcoder

No, it's language development :P

quartata

then why on earth would you opt for a version that's so much slower

math.ceil(math.log10(...)) is basically the definition of how many digits a number has

DLosc

22:20

Another corner case: 0

Mr. Xcoder

Why on earth would I ever import math? Anyway, I don't use that anymore

quartata

because math has math.sqrt

Mr. Xcoder

No... There's ** (0.5) for that

Destructible Lemon

math.sin?

Mr. Xcoder

Wait I have math imported >_>

For trig

Dammit ;-;

quartata

22:21

I would hope

@Mr.Xcoder don't do this

Mr. Xcoder

Why exactly?

Destructible Lemon

I would also like to know

quartata

readability

Mr. Xcoder

;-;

DLosc

Is there a performance difference, too? I would think that math.sqrt might take advantage of a specialized square root algorithm that **, being more generalized, can't.

Mr. Xcoder

22:23

Nope.

Destructible Lemon

@Mr.Xcoder citation pls

Mr. Xcoder

I think math.sqrt uses ** (0.5)

Poke

what's wrong with math

Mr. Xcoder

It's... heavy.

Destructible Lemon

@Mr.Xcoder how does this prove performance

Mr. Xcoder

22:24

But I use it anyway so...

Οurous

If the arguments are both integers, and so is the result, is the result guaranteed to be an integer in IEEE floating-point when all three can be represented in the number type?

Mr. Xcoder

Just a sec

Destructible Lemon

@Mr.Xcoder just import only some of it then

python has that ability

Mr. Xcoder

I know...

Actually, you are right.

math.sqrt() is faster

Destructible Lemon

@Mr.Xcoder uh, idk about that

1.7088023014366626e-07 > 2.276967279613018e-08

quartata

22:27

it's consistently that too

but the performance doesn't matter

not for something that tiny

what matters is that **(0.5) looks like line noise

Mr. Xcoder

We're literally talking about 10 ^ (-8)... It doesn't matter

Destructible Lemon

i think the import math might be slowing it down though

quartata

@DestructibleLemon no that's not included in the time

Mr. Xcoder

I'll use math.sqrt

Destructible Lemon

@quartata yeah ok. weird that it would be slower

quartata

22:29

function call

python's bad at them

DLosc

@Mr.Xcoder Yeah, it's the other way around. I just ran a benchmark and got ~10 secs for a bunch of runs of ** 0.5, versus ~34 secs for math.sqrt.

Destructible Lemon

ok not gonna use math.sqrt then

Mr. Xcoder

So... Now I am confused

Destructible Lemon

this confirms that i do not need to change my ** .5s

Mr. Xcoder

I'll just use ** (1 / 2) instead :)

DLosc

22:30

I think quartata's right. Function call overhead.

quartata

@DestructibleLemon the behavior @DLosc is describing is over millions of iterations

@Mr.Xcoder that will for sure be slower, python doesn't do much constant folding

DLosc

Too bad Python doesn't have macros like C. It could just statically rewrite math.sqrt(x) to (x)**0.5 and we could all be happy.

quartata

pypy and cython probably do that

Mr. Xcoder

Ok I'm going to step out of this discussion about infinitesimally small performance differences for taking the sqrt :P

Destructible Lemon

@quartata but rationalisation!!!!

i already wrote the thing

DLosc

22:32

100 million iterations, to be precise.

quartata

makes sense

10/10^(-7)

DLosc

@Mr.Xcoder TNB: Much Ado About (Next To) Nothing

Erik the Outgolfer

@AlexA. something for you to remember your past moderator self

quartata

I suspect that that changed in recent Python

because ** normally really does use pow which will always be slower than dedicated sqrt

plus it has a bit of overloading from what I see

Mr. Xcoder

@EriktheOutgolfer Here are his last moments, immortalized. – He ain't dying :P

Erik the Outgolfer

22:36

it's the moments that are immortalized :)

Mr. Xcoder

Yeah but his last moments :)

Erik the Outgolfer

> his last moments as a moderator

lol what were you thinking

Mr. Xcoder

You changed that after I commented – Nah, it doesn't work that way :)

Erik the Outgolfer

I don't say it does, but it's easy to understand what I really mean

Mr. Xcoder

I know but...

Everyone's talking about me like I'm dying or something. The only difference is that I won't have a diamond. — Alex A. ♦ 2 hours ago

Erik the Outgolfer

22:40

ah, thanks for mentioning it then, he would have thought I too thought he was dying o_o

Mr. Xcoder

Np

DLosc

@Mr.Xcoder I've had this exact experience when leaving an online community. It's interesting how human psychology works. If you never see someone anymore, it really is as if they're dead. (Or in Alex's case, he's only mostly dead.)

Mr. Xcoder

I've left many online communities so far, one of which I was kind-of a mod on, so I know the experience :) But I didn't quite like that place anymore

New Main Posts

-1

Q: Find the dot product of Rationals

I was at a friends house for dinner and they suggested the idea of a "Prime-factor vector space". In this space a the natural numbers are expressed as a infinitely dimensional vector such that the nth element in the vector is the number of times the nth prime divides the number. For example 20 ...

DJMcMayhem

@DLosc Yeah, but we won't never see him anymore. In fact, we'll probably see him just about as much as we currently do.

DLosc

22:47

Sure. He's been mostly dead for a while--now it's just official. ^_^

Mr. Xcoder

My brain can't process that many negations in a single sentence this late :|

DLosc

It's only a little double negative, what's the problem? :D

Mr. Xcoder

The problem is hanging around in TNB at about 1 AM :p

DJMcMayhem

I can confidently not say, that the statement: "It isn't not true that we won't never see him anymore" is false.

@Mr.Xcoder

Mr. Xcoder

You flaked my brain completely.

DLosc

22:56

@DJMcMayhem I mean, sure, I imagine you can confidently not say many things. I can confidently not say that the earth is round. But I can also confidently say that the earth is round. Not saying stuff is easy, and fairly easy to do confidently.

DJMcMayhem

Hmm, maybe I should have said "Can't confidently say"

Destructible Lemon

my school system doesn't allow me to access it because it says i'm not a registered user every now and then >:(

Mr. Xcoder

@DJMcMayhem Do I smell confusion? D:D

Destructible Lemon

I submitted the wrong thing and want to substitute it with the right thing but i'm not a registered user all of a sudden so i can't and there isn't anywhere to enter a password because it is that useless

also i think i forgot what my password was because they had that change password thing happen

>:(

oh and they have those bullshit security questions i don't remember the exact phrasing to

thanks school

the only thing i remember about my password is they had that bullshit please include 1 number thing

Οurous

Every time my uni asks me to change my password, I increment the number I used for the last one and hash it. I'm almost up to 10.

DLosc

23:10

@Οurous So your password is a hash? Do you memorize it?

Poke

@DLosc why would he memorize it if it's easily calculated

Destructible Lemon

i imagine he uses a hash function and is using such an insecure password out of spite?

yeah anyway thanks school

i hate security questions so much

Poke

@DestructibleLemon or so he can easily remember the base o.O

@DestructibleLemon because they're basically just additional passwords that people pick easy to remember answers for?

Οurous

@DLosc Chrome does. I know the algorithm and the number so I don't need to.

Destructible Lemon

@Poke no because i have to fuckign remember the exact phrasing on something i only use if i forget the password, which i only tend to do if i haven't used the system to input my password in a while, and they're all invariably targeted toward 20 something year olds or some shit even in a school system or something and never apply to me in anyway so its almost always some variation of: this security question does not apply which i can never remember exactly how i answered it

Poke

23:16

@DestructibleLemon i generate random strings for security question answers and save them alongside my password in my password manager

because they don't really provide additional layers of security

Destructible Lemon

liek what was the colour of your first car

Poke

The color of my first car is qbsyvcAE8xBs@T3$0ZT*1rz&v7!Ge83g3hnxjRgKU9

2

ez

Destructible Lemon

i prefer when they just email you a reset link

which i guess is bad if your email is compromised, but any security question easy enough for me to remember probably isn't secure either

like the only time i ever typed in my new password was when i set it the first time so like how the frick am i supposed to remember it

i fucking hate it when there are password length limits too. like those have never helped me remember a password, they only make it harder

Poke

just use a password manager

and all your worries melt away

Destructible Lemon

like, i know what i tried to make my password, but what did i make it after the arbitrary restrictions

@Poke either way its a bit late for that now

Poke

23:20

maybe for this iteration of forgetting

Downgoat

@Poke good luck telling this to the customer support guy over the phone

Poke

but now is as good a time as any to start using one

@Downgoat yeah 42 is a little long. for security questions i usually limit it to like 18

Destructible Lemon

@Downgoat why do they store the security questions plaintext >:(

Poke

@DestructibleLemon because they don't understand how security works

Destructible Lemon

@Poke stupid thing

Poke

23:22

get used to it

you'll be facepalming for the rest of your career if you're in anything involving security

orlp

when I installed windows 10 (for only a couple minutes) when I got this laptop

it asked for a mandatory password hint

Destructible Lemon

i feel like if they had a better system for security questions, like, where i can actually tell what my answer would have been, it might be tolerable

orlp

I gave it the hint "no"

Poke

I think my hint is "i like elks"

haha

Destructible Lemon

tbf that password hint has helped me more than security questions ever would

like

the only person who is going to be able to change my password account now isn't me

Mr. Xcoder

23:30

@DJMcMayhem Kinda done :).

It's not exactly a User appreciation challenge, but still.

New Main Posts

2

Q: There are two new sherifs in town – Identifying DJMcMego pairs!

We have some new sherifs moderators in town, Mego and DJMcMayhem. We need a challenge to properly honour them for their new positions, so there we go. Here's something that has caught my attention when hovering over their profiles – their user IDs are 31716 and 45941. If you perform digit-wise...

code-golf array-manipulation decision-problem sorting

Mr. Xcoder

23:55

A sherif is a highborn. Do you mean sheriff? — Dennis ♦ 1 min ago

@Dennis Yes, thank you! That’s the worst typo I’ve ever made!

Dennis

Not a big deal.

I have a coworker named Pedro. I'm not very good at typing on a touchscreen, so I wrote Hola Pedo. as a reply to his WhatsApp message. Pedo is Spanish for fart.

Mr. Xcoder

That’s even worse, you made me feel better :-)

I have to go get some sleep now. Hopefully there isn’t anything unclear...

DJMcMayhem

@Dennis It has even worse connotations in English...

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