The Nineteenth Byte

12:01 AM

They contradict. And yes, CG is definitely the best choice when you're new to the site.

12:17 AM

@hyper-neutrino the H flag is being saved for emergencies (read: someone else figures out 11 bytes and I need to quickly reach 10)

hyper-neutrino

lol

Redwolf Programs

What's the H flag?

lyxal

Start the stack with 100.

Redwolf Programs

Who wants to join my new Vyxal Is Bad club?

:p

lyxal

Not ZippyMagician

That's for sure

caird coinheringaahing

12:20 AM

I'll help be a founding member :P

hyper-neutrino

i would like to sign up (after lyxal and razetime award my bounty of course - until then, vyxal is a very good language)

vyxal's cool though. like in all seriousness. takes me some time to think of the right approach because jelly is very different :P

Redwolf Programs

I think I'm going to write up a meta post suggesting a new method of flag scoring.

caird coinheringaahing

tbh Vyxal's builtin set is my least favourite bit

I've taken a browse through the commands list, and I don't know if the descriptions aren't good, or if the list of builtins isn't great :/

lyxal

keep in mind that most are stolen from 05ab1e and jelly

besides, y'all are just jelly that the Vyxal interpreter is part of the George webring

hyper-neutrino

g e o r g e

caird coinheringaahing

12:26 AM

@lyxal What does counts_of_items(a) mean?

hyper-neutrino

the thing is even if flags are stored as 1:1 bytes

you can overload a size-512 codepage like that, basically

Redwolf Programs

My proposal would be 1:1, but an extra byte for using both flags and code

caird coinheringaahing

@RedwolfPrograms That's worse than 1:1

Redwolf Programs

That'd be almost the same as having two programs, with a delimeter

lyxal

@cairdcoinheringaahing `abcdefabcdef`Ċ → ⟨⟨`e`|2⟩|⟨`c`|2⟩|⟨`f`|2⟩|⟨`b`|2⟩|⟨`a`|2⟩|⟨`d`|2⟩⟩

Redwolf Programs

12:27 AM

It still gives a tiny advantage to flags, but it's absolutely tiny

Basically one extra command in the code page

hyper-neutrino

@lyxal have you tried that on this challenge

is this the specific built-in you mentioned yesterday :P

Redwolf Programs

You could make it perfectly fair with some math, but you'd end up with super awkward non-integer or even irrational byte counts

lyxal

@hyper-neutrino no, that's been around since before v1

Redwolf Programs

That was in Ash too

caird coinheringaahing

@hyper-neutrino That's specifically why I asked, Ċ should be hella powerful there

hyper-neutrino

12:29 AM

ah

okie

I have my numerical BF mostly ready, but I still need feedback, please send me help

hyper-neutrino

0/10 no documentation

Redwolf Programs

The + and - are completely different from normal brainfuck

okie

:579793 crap, Iget exposed

Ipad sucks

@RedwolfPrograms Yes

Redwolf Programs

Your README says it has 8 normal brainfuck commands

okie

12:34 AM

@hyper-neutrino I will add that as soon as possible, but i am unsure if this language is practical

@RedwolfPrograms I will fix that

:)

Redwolf Programs

How do you initialize a cell to a nonzero number?

hyper-neutrino

well it doesn't look like many commands to document

also practicality shouldn't matter, even brainflak is documented :P

user

Someone started talking about CNN the news network on this Quora question about (presumably) convolutional neural networks :D

okie

@RedwolfPrograms same old [-]

user

So it wraps around?

hyper-neutrino

12:47 AM

what if the cell to its right isn't 0

@user well 30% about CNN, 70% about FOX/conservatives (by which i think she means trump supporters specifically) lmao

idek what the point of that answer is. even if the question is about CNN the news network the answer doesn't even help lmao. but it's quora, so

i'm not surprised

caird coinheringaahing

@lyxal How do you input a list in Vyxal? The Python style [1,2,3] doesn't work?

lyxal

@cairdcoinheringaahing [1, 2, 3]

but if you use the offline interpreter, [1,2,3] works

hyper-neutrino

does Try it Online! not work

okie

@hyper-neutrino it do cell[p]-=cell[p+1]

hyper-neutrino

nvm

in that case Try it Online!

@okie right so what if the current cell is 1 and the next cell is 2

[-] would never terminate

lyxal

12:50 AM

@hyper-neutrino oh hey my safe eval regex isn't broken after all

hyper-neutrino

> regex

Redwolf Programs

> safe eval

lyxal

@RedwolfPrograms I'm not about to let you run arbitrary python on my server

Redwolf Programs

This is a silly. This is a silly and a danger.

okie

@hyper-neutrino Yes, I am thinking about negative number and how to solve it

caird coinheringaahing

12:51 AM

@hyper-neutrino Vyxal doesn't seem to have a sublists builtin. ǎ is only for strings :/

hyper-neutrino

yeah i noticed too :/

okie

I want to have negative number as a possibility

lyxal

laughs in ÞS

Redwolf Programs

Just parse it as JSON or split it on commas or something, this is like using a grenade launcher to unlock your front door

lyxal

(\[(((-?\d+(\.\d+)?)|\g<1>|"[^"]*"|'[^']*')(, *)?)*\])|(-?\d+(\.\d+)?$)|"[^"]*"|'[^']*'

@RedwolfPrograms how is JSON gonna filter out python keywords?

okie

12:52 AM

I think i am getting a copy operator, which copy next cell

lyxal

@cairdcoinheringaahing Aaron Miller added a built-in for that

caird coinheringaahing

@lyxal When?

I tried searching for "sublists" in the docs file when the challenge was posted, didn't show anything

lyxal

@cairdcoinheringaahing I merged the PR an hour ago or so

Redwolf Programs

Wow, fricking thanks custom review stalker, for not opening the tab despite knowing full well there was a review task >:[

lyxal

you should calm down with some lo fi boris johnson

2

Redwolf Programs

12:57 AM

Oh, found the problem

caird coinheringaahing

@RedwolfPrograms Also, the review queues don't show the same tasks to the same users

Redwolf Programs

@lyxal Even better, that's posted by a legit political party's YT account

lyxal

@RedwolfPrograms correct.

OldSandboxPosts

Sandbox posts last active a week ago: Produce a range, Radio station hopping, Sum multiplication carries

caird coinheringaahing

@RedwolfPrograms That's worse

The Tories deliberately let children starve and flat buildings burn down, but hey look, meme

@lyxal Does ¨U auto-prepend the https:// to it's argument?

lyxal

1:02 AM

@cairdcoinheringaahing yes

stolen right from jelly

caird coinheringaahing

And 05AB1E, and IIRC MATL :P

Redwolf Programs

I have a (probably) new painful programming language feature to unleash upon the world. Designing a quick proof-of-concept golfing language around it.

lyxal

also, ḋ on two strings is a direct port of jelly (read: I copy-pasted right from jellylanguage repo)

hyper-neutrino

imagine copying ideas from jelly. couldn't be me. never done that before.

lyxal

s/copying/stealing

hyper-neutrino

1:06 AM

lol

New Main Posts

1

Q: How can this code be more "golfed"?

I'm not sure if this is the right place to ask, but I found this similar question so I'll go ahead. I'm very new to code golfing, so keep your smothered laughs and throw-up emoji's to yourselves please ;). Anyway, someone recently posted a challenge (that was shortly deleted) to draw a 16x16 pixe...

lyxal

@NewMainPosts 15 minutes slow

bad.

Redwolf Programs

What should vectorizing a nilad over an array do?

Fill?

Or something fancy?

lyxal

just return the nilad

that's what i do

Try it Online!

Redwolf Programs

That's what Ash did, but it feels like a waste.

caird coinheringaahing

1:10 AM

@RedwolfPrograms Replace each element with the nilad

Redwolf Programs

Basically a fill function

(Ignoring impure functions)

hyper-neutrino

mapping over a nilad for yuno fails because i suck at coding

lyxal

wanna hear the most illegal thing about vyxal: multiplying a lambda by a number changes the lambda's arity

hyper-neutrino

lol wut

okie

i don’t know why, but I have an idea with an esolang with game of life

i dont know what am i saying

2d esolang or something

caird coinheringaahing

1:24 AM

Game of Life is an esolang :P

hyper-neutrino

see: tetris

lyxal

okay who changed my keyboard layout again?

hyper-neutrino

me

lyxal

why?

caird coinheringaahing

mod powers

lyxal

1:37 AM

that's how, not why.

caird coinheringaahing

its why as well :P

lyxal

wow

disappointing

I expected something more elaborate

smh

hyper-neutrino

mod powers -> modexp

caird coinheringaahing

ᵐᵒᵈ

lyxal

as I said, underwhelming

Matthew Daniels

1:53 AM

my pfp is just too sick. lmao

@hyper-neutrino 11

lmao

lyxal

Kekw

okie

2:18 AM

okie

lyxal

Smokie

caird coinheringaahing

CMM: Differences between voting votes up-votes down-votes? Should any of them by synonyms of any others?

hyper-neutrino

do the former two categories include anything to do with close/reopen/deletion votes

caird coinheringaahing

I think merging/synonymising votes as a synonym of voting is probably a good idea

Matthew Daniels

they should all be merged to voting.

caird coinheringaahing

2:28 AM

@hyper-neutrino voting is all up/down votes. votes has a couple of vote-to-close questions, and one about votes in the election

hyper-neutrino

ah

i'd say synonymize them all under voting, and retag the ones under votes

caird coinheringaahing

I think you might be the only one who can do that :P

hyper-neutrino

lol

caird coinheringaahing

I have a score of 8 in votes and 12 in up-votes, but nothing in voting :P

hyper-neutrino

we don't have a good tag for the post about deletion votes

i could tag i under deleted answers, i guess

caird coinheringaahing

2:31 AM

vote-to-delete would be a good tag to have around if/when it's needed

I'm surprised that isn't one of the "pre-created" meta tags tbh

Aside from this, I believe all the questions under votes fall under up-votes/down-votes/voting

Matthew Daniels

my last message before I can't talk in a year:

lmao\

bye, guys. ):

Adám

@MatthewDaniels Why can't you talk in (for?) a year?

caird coinheringaahing

Check their profile

Adám

Oh, so how comes he could send those messages?

caird coinheringaahing

Caching, I suppose?

Although an hour for suspension caching is a bit odd

Razetime

2:41 AM

hm why suspended

Adám

I'm not a mod, but I'm curious why he got suspended for an entire year. To me, he seemed to be just getting the hang of how CGCC works.

caird coinheringaahing

A reason that we neither know nor should discuss

I'd be very surprised if the mods have handed out a year's suspension for something unjustified, and they have an obligation to the user to not tell us the reasons behind it

Adám

Right.

Razetime

I did not expect the rotation safe quine bounty to get claimed so quickly

caird coinheringaahing

Martin works fast :P

That's how he has close to 190k :P

Razetime

2:53 AM

tfw sticky polyhexes also gets solved in vim

okie

3:54 AM

Great, I can't post my question because Title must have at least 15 char

And I determined to make either a short base guard or a super long title

any suggestion for title-that's-too-long-that-it-hits-title-limit

or else I am putting lyxal into title, 100% bad idea but practical

New Main Posts

4:19 AM

1

Q: Base-ically Guard

Base: part 1 This is part 2, Strongly suggest you go try out the first one if you haven't tried it. Story As one of the solvers, You've managed to get to the door of the base heaven. In front of the door stands the base guard @lyxal, he was angry that you all just left the encoded text on the gro...

code-golf number base-conversion

okie

@NewMainPosts very nice, 21 min delay

Redwolf Programs

4:46 AM

I could watch Ted Cruz read green eggs and ham all day honestly

Y'all listen to music, I listen to that

lyxal

@RedwolfPrograms that's no match for lofi trump

hyper-neutrino

interestingly, there's a mixed base conversion challenge already, but it requires conversion from one mixed base to another, so it's sort of the joined version of both of okie's

Redwolf Programs

@lyxal I dunno, he reads it with such passion and reverence it almost makes them equals

lyxal

@RedwolfPrograms and it doesn't come anywhere close to autotuned elon musk

lyxal

5:06 AM

TIL Python 3.6.9 exists

nice

Redwolf Programs

Wow, I'm actually able to outgolf myself by a lot now

hyper-neutrino

i've always been able to outgolf myself by a significant amount

the secret is to be bad the first time

Redwolf Programs

I've always been good at that part

Just now learning to follow up on it with being good :p

3 in [1, 2, 3] is fun because it has totally different meanings in JS or Python

hyper-neutrino

of course ಠ_ಠ

Adám

@RedwolfPrograms And probably a 3rd meaning in APL.

lyxal

5:14 AM

@RedwolfPrograms w...what's the JS meaning?

Redwolf Programs

Checks if 3 is a valid index of the array

Arrays are just fancy objects, so they get the same in operator as those

Razetime

@Adám since when did APL have keywords

lyxal

@RedwolfPrograms Wow imagine not being able to have negative indexes

Redwolf Programs

That is one of the most painful parts of JS

array[-1] being undefined is the biggest mistake in the history of the universe

Adám

@Razetime It doesn't. It means the first 3 elements of 3 in (which errors, as there are only two, by the syntax is sound).

hyper-neutrino

5:16 AM

oh right

for (var x in [3, 4, 5]) console.log(x) gives 0 1 2 doesn't it?

Redwolf Programs

Yep

hyper-neutrino

and you need to use of or smth to make it work for some reason

javascript gives me the big sad

Redwolf Programs

You usually would just have [3, 4, 5] in a variable like a and then console.log(a[x])

Razetime

yeah of is the right word

Redwolf Programs

It's actually somewhat sensible for objects

And JS just loves treating things like objects that have no business being treated like objects

Adám

5:18 AM

@RedwolfPrograms Well, since -1 indicates that something wasn't found, when doing indexOf then having array[-1] give anything but undefined wouldn't work.

Redwolf Programs

I disagree

Because you can set array[-1]

Adám

Wait, what‽

Redwolf Programs

It's just an object with some built-in methods

You can do array["foo"], array[-10], array[array], and so on

hyper-neutrino

thanks, i hate it

Adám

Ugh.

Redwolf Programs

5:21 AM

"oh no, we need array but the due date is tomorrow!"
"no worries, i got this"

lyxal

That's why I don't JS

Redwolf Programs

Arrays are probably one of the jankier parts of JS

Adám

@lyxal What do you web frontend in?

lyxal

@Adám JS only if absolutely necessary

And I rarely do web dev anyway

Adám

@lyxal So pure HTML+CSS whenever possible?

Redwolf Programs

5:23 AM

var x = document.createElement("p");

x.id = "y";
x.foo = "bar";

document.body.appendChild(x);

y.foo // bar

That is another janky JS feature

Enjoy it

hyper-neutrino

i'm convinced js was a practical joke played on all programmers

Redwolf Programs

If you run it twice the result is undefined

okie

lyxal, I think you will approve this

hyper-neutrino

the only custom JS i use on my personal site is a line of initialization code to work with materialize, and one function to show my email on button press without having my email be crawlable

@okie mfw i get more upvotes from porting my jelly sol into a language that takes more bytes to do the same thing

lyxal

@Adám if possible, yes

hyper-neutrino

5:26 AM

it's 11 vs 8 bytes and i'm saving a byte by abusing flags too ;-; i'm probably doing it wrong anyway

okie

@hyper-neutrino Jelly is everywhere

Adám

@lyxal Writing things like tabs/accordion widgets, theme switchers, and rotating picture galleries in pure HTML+CSS is a fun exercise.

Razetime

@hyper-neutrino idk why but jelly gets downvoted a lot

hyper-neutrino

prob the same golflang-hate that's always been around

it didn't get downvoted it's just that my vyxal one is +4 and my jelly one is +2

even though the jelly one was first and i just ported it, and my jelly sol is better

for this challenge jelly's tacit is significantly better, at least by my approach

okie

@hyper-neutrino I don't hate any golflang :) ~~except regexp stuffs because I failed to understand it~~

Razetime

5:35 AM

@okie you mean Retina?

Retina has a very good tutorial

okie

I mean, the normal regexp, I didn't knew that Retina was regexp based

Razetime

5:48 AM

oh interesting

learning regexps is fun

Adám

The best thing about regex is that it provides a good response when people claim APL is unreadable.

Redwolf Programs

6:03 AM

RegExp is more readable than APL

:p

okie

I TRIED REGEXP, I REALLY TRIED(crying in the corner)

Razetime

well what did you find hard

Wasif

6:37 AM

sup everyone

i don't think baseically guard challenge is much different than the god one

okie

@Wasif Yes

/.n/ Do what in regexp

hyper-neutrino

. is the "match any character" symbol

so it matches any character followed by the letter n

Adám

@Wasif They are inverses.

Wasif

oh I see

Adám

@okie regex101.com/r/0lIilp/1

okie

6:45 AM

if I try to match nnn using /.n/, it only match one, bruh

It don't step back

A username

@okie it should match two

/n*/ would match an arbitrary amount of ns

hyper-neutrino

i think they mean only matches one instance

okie

I used the link provided by Adam

New Sandboxed Posts

7:20 AM

0

A: Sandbox for Proposed Challenges

[Draft] Write out the 2x2 Hamiltonian Circuit Unlike the 3x3 Rubik's Cube, which famously has over 43 quintillion possible positions, the 2x2 Pocket Cube "only" has about 3.7 million positions, making a Hamiltonian circuit (a set of moves that visits every position exactly once) perfectly feasibl...

Razetime

@Wasif it's better than putting encoding and decoding in the same question

codegolf.stackexchange.com/a/91891/80214 I wonder how this'd be in latest brachylog

StackMeter

sup

we talking about the mighty regex

if wezl went extinct, nothing would really happen @pxeger

lyxal

7:39 AM

@hyper-neutrino Try it Online!

Wasif

@StackMeter hi

StackMeter

yo @Wasif

Wasif

how is Anti-Alpha goin' on

StackMeter

good

I actually figured out how to write the interpreter

so I'm getting on that now

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Optimal addition subtraction chain math code-golf An addition-subtraction chain, is a sequence \$a_1, a_2, a_3, ... ,a_n\$, such that \$a_1=1\$ and for all \$i > 1\$, there exist \$j,k<i\$ such that \$a_i = a_j \pm a_k\$. Your task, is given a number \$x\$, find the shortest addition-subtraction ...

StackMeter

7:44 AM

should be released late June, early July at worst

by the way

since you're here

how does one compress in python

okie

@StackMeter Do you mean list compression?

list comprehension

StackMeter

I mean string compression

Will this help?

@okie yes

meow ;D

7:54 AM

ok someone stop HN clearing the review queues

lyxal

@okie gives the cat a bath

New Main Posts

2

Q: Random Move 2x2 Scrambling

A simple way to scramble a 2x2x2 Rubik's cube is to make a sequence random moves. This is not how official scrambles are done, but can get pretty close to a uniform distribution of all possible scramble states. Due to the way a 2x2 only has two layers, doing one turn on one face is equivalent (wi...

code-golf string random

lyxal

@StackMeter pssst

okie

Actually, my cat in actual life like to play water, sadly not swimming

lyxal

rickrolls cat again

okie

7:58 AM

Does rick have a cat?

lyxal

apparently yes

source

StackMeter

lol

We're no strangers to love
You know the rules and so do I
A full commitment's what I'm thinking of
You wouldn't get this from any other guy

I just wanna tell you how I'm feeling
Gotta make you understand

Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you

We've known each other for so long
Your heart's been aching, but
You're too shy to say it
Inside, we both know what's been going on

Razetime

8:53 AM

@hyper-neutrino yuno looks pretty nice. I'm assuming you use dakuten and han-dakuten for two byte builtins?

StackMeter

9:16 AM

lol

the rickroll is now starred

A username

@lyxal Lol

A username

9:57 AM

Feedback please?

And this, which has been completely ignored

So has this

Wheat Wizard

4

A: Sandbox for Proposed Challenges

Implement a function \$f\$ (as a function or complete program), such that \$ \displaystyle\lim_{n\rightarrow \infty} f(n) \$ converges to a number which is not a computable number. Answers will be scored in bytes with fewer bytes being better. IO formats Your answer may be in any of the following...

I just made some changes to IO format. I'd appreciate it if I could get some eyes on it since I would like to post this today.

A username

@WheatWizard Can you explain how this is possible?

Wheat Wizard

This is just one of a million ways in which limits can be counter intuitive. For an example, imagine an 𝑓 where 𝑓(𝑛) just takes the first 𝑛 Turing machines and runs them for 𝑛 steps, if machine 𝑚 halts in the test run then you add 2^−𝑚 to a total (think about what this means in binary). This is obviously computable, we can simulate Turing machines for 𝑛 steps and add rational numbers. But the limit encodes the exact solution to the halting problem. This is actually the first example number given in the challenge.

From the comments there.

A username

@WheatWizard That is clever.

StackMeter

when are bounties allowed to be rewarded

A username

10:07 AM

@WheatWizard I think this is good, but just in case I'd get one of the others to look at it.

Razetime

@StackMeter whenever you want

you just start the bounty

and you can immediately award it

StackMeter

ok

New Main Posts

11:09 AM

1

Q: Compute the uncomputable ... sort of

Implement a function \$f\$ (as a function or complete program), such that \$ \displaystyle\lim_{n\rightarrow \infty} f(n) \$ converges to a number which is not a computable number. Answers will be scored in bytes with fewer bytes being better. IO formats Your answer may be in any of the following...

code-golf number sequence

New Main Posts

11:33 AM

0

Q: Let's play Judgement!

In this king-of-the-hill challenge, you will be making a python 3 bot to play the card game judgement! Sandbox Rules Judgement is a hand based game similar to games like rummy. In each round, 7 cards are dealt to each player, a trump suit is chosen (trump suits are chosen sequentially from the li...

king-of-the-hill python card-games

rak1507

12:10 PM

@cairdcoinheringaahing I mean, it's pretty obvious...

surprised it took so long tbh

lyxal

12:31 PM

CMQ: what do you think my favourite song is? (as in, what do you think I'd put on repeat a lot?)

Aaron Miller

@lyxal idk maybe something like this?

lyxal

@AaronMiller that's where you're wrong

StackMeter

1:07 PM

lol

lyxal probably listens to darude sandstorm

lyxal

Also incorrect

StackMeter

lol

I have another song for u

lyxal

Hmmm which one

StackMeter

Gonna Give You Up by Rick Astley

[Intro]

[Verse 1]
We're strangers to love
You know the rules but I don't
No commitment's what I'm thinking of
You would get this from any other guy

[Pre-Chorus 1]
I don't wanna tell you how I'm feeling
Gotta make you misunderstand

[Chorus]
Gonna give you up
Gonna let you down
Gonna run around and desert you
Gonna make you cry
Gonna say goodbye
Gonna tell a lie and hurt you

[Verse 2]
I don't know you so well
Your heart's been aching but I don't give a shit
I don't know what the hell's been going on

lyxal

Lol

I've heard that before

StackMeter

1:11 PM

lol

lyxal

spoilers for the CMQ answer

StackMeter

@lyxal can't access it

lyxal

Whyn't?

StackMeter

1:24 PM

b"-sin" it's blocked on this network

Redwolf Programs

Morning everyone!

StackMeter

it's 2:24pm

Redwolf Programs

Just got reverse rickrolled by chat, so I now have immunity to one rickroll.

StackMeter

lol

Redwolf Programs

I better not waste it on a self-roll again

StackMeter

1:26 PM

@RedwolfPrograms there's three that are here for the person that is you

caird coinheringaahing

@rak1507 If you're thinking it's because they've been disruptive in chat, I can almost guarantee it's not. The appropriate course of action there is kicks (notifies the ROs), then a short chat suspension (typically a week).

StackMeter

@hyper-neutrino check out my tag-wiki-edit

caird coinheringaahing

@StackMeter Which tag wiki?

Adám

I just saw a commit message saying:

> Corrected reference to showCCGC fn

Needless to say, I read that wrong at first.

Redwolf Programs

Took me at least five reads to notice that was CCGC lol

(Both acronyms are green ;p)

Adám

1:43 PM

"show" isn't bothering "CCGC"?

@RedwolfPrograms So you also saw "CGCC"?

Redwolf Programs

Yep

Would CCGC be Coding Challenges and Golf Code?

hyper-neutrino

@Razetime Not exactly; I haven't exactly decided on what to start my digraphs with but normal kana, dakuten, the sokuon, and (most/all) combinations are all counted as one byte

StackMeter

@cairdcoinheringaahing the "vote-to-delete" tag

hyper-neutrino

so like ッシュ is one byte

caird coinheringaahing

@StackMeter Yep, just finished reviewing it :P

StackMeter

1:45 PM

ok

@cairdcoinheringaahing was it accepted

Adám

@RedwolfPrograms In this case it stands for Compaction Count & Garbage Collector.