The Nineteenth Byte

Marcus Andrews

00:01

$><<gets.upcase.chars. already takes up most of it

so there's probably some shortcut

Luis Mendo

print(sum(ord(k)&95-64for k in s))

Or even print(sum(ord(k)&31for k in s))

seems to work

Marcus Andrews

clever

Luis Mendo

Anyway, way shorter in Octave :-) sum(upper(s)-64)

Marcus Andrews

why not just sum after the gets

er, upcase

p gets.upcase.sum-64*(some shortcut for length)

Pavel

@MarcusAndrews Because I forgot that sum works on strings

Marcus Andrews

00:06

ahh according to codegolf.stackexchange.com/a/2992/57094

p gets.upcase.sum-64*~/$/

there's 25 LOL

i wonder if luis' trick can condense even more

Pavel

@MarcusAndrews This will include an extra newline in the count, you'll want gets.chop.upcase.sum

Marcus Andrews

according to the post it doesn't count newlines

and seems to return the right value in my ideone test

might have to do with using it after gets?

Pavel

@MarcusAndrews ~/$/ doesn't count newlines, .sum does.

Marcus Andrews

ah i see

tio.run/##KypNqvz/v0AhPbWkWK@0IDmxOFWvuDRX18xEq05fRf//f9/EkgwA

Marcus Andrews

00:22

what about taking a string and printing it in first-last order repeatedly?

e.g. "12345" -> "15243"

I have it down to this:

p=input()
s=""
while p:s+=p[0];p=p[1:][::-1]
print(s)

can anyone do better?

Thomas Ward

@MarcusAndrews Debian.

New Main Posts

00:37

-6

Q: Fill a hard drive

Given a Windows, OSX or Linux machine, write a program that fills the hard drive of the machine. Edit: Your machine has a 4TB hard drive, 16 GB ram, and an off-the-shelf processor (pick one if it suits your needs) Winning Criteria: This is code-golf, so the shortest code in bytes wins!

Magic Octopus Urn

Fill an HDD... {while(1){it.write(0,1);}} groovy.

Pavel

@MarcusAndrews p=gets;$><<p[0]+p[-1]and p.slice!1..-2until p.empty?

Nevermind doesn't work

Marcus Andrews

in Ruby I have it down to

s=gets.chars
$><<s.shift+s.pop.to_s while s.size

using your print trick

I also tried this but too long (Python):

Pavel

@MarcusAndrews Runs infinitely. 0 is considered a true value for the purposes of while.

Try until s.empty? instead.

Marcus Andrews

or s.size>0 perhaps

er is that shorter

same

Pavel

00:44

Yep.

What's the .to_s call for, anyway?

Marcus Andrews

if I leave it off it doesn't print all the chars

tio.run/##KypNqvz/v9g2PbWkWC85I7GomEvFzsamWK84IzOtRLtYryC/…

Wheat Wizard

has anyone here gotten Opus Magnum yet?

Qwerp-Derp

Hello!

Pavel

@WheatWizard What's that

Wheat Wizard

@Pavel It's the newest zachtronics game

Qwerp-Derp

00:52

I have a binary file foo in Mac OS X, which is dynamically linked to some dylibs. How do I statically link to those dylibs instead?

Pavel

@Qwerp-Derp You'd have to modify the lib to act as a static library and recompile the binary.

Qwerp-Derp

How do I do that?

I'm pretty much a complete beginner in the C/C++ environment (even though what I'm doing right now is in Crystal)

Pavel

@Qwerp-Derp You get the source code for both, and then modify the library's header file declare symbols for linking by the compiler instead of linking them from a shared library at runtime. Why are you even doing this?

Qwerp-Derp

@Pavel I want the binary to be stand-alone

@Pavel Also I don't have the source code for the .dylib files, I only have the .dylib file itself

Pavel

@Qwerp-Derp Well then you're basically screwed. You can't statically link a library made to be dynamically linked without modifying the library's source be statically linkable.

Qwerp-Derp

00:59

Ah :(

So there's no way of changing a .dylib to a .a without the source code?

Pavel

@Qwerp-Derp No.

seshoumara

hello

Thomas Ward

@seshoumara hi!

seshoumara

the fill a hard drive was put on hold a few seconds before submitting my 5 bytes answer :(((

Thomas Ward

probably because it's unclear :P

seshoumara

01:06

it is, but I've seen worse

Qwerp-Derp

Does libiconv.dylib come with OSX?

Thomas Ward

@seshoumara Unclear is unclear regardless so blah.

Community opinion > 1 person's opinion

user202729

03:05

Does Jelly have file i/o? (for example can it solve this?)

Leaky Nun

@user202729 I don't think it has a natural file i/o

(you can embed python codes in jelly so everything that python has, jelly also has)

New Main Posts

04:12

0

Q: How long should my microwave run?

I'm hungry. Let's microwave something. Given a numerical input of between 1 and 4 digits, output the number of seconds that the microwave should run. Details The trick is figuring out if the user is inputting seconds or a combination of seconds and minutes. The ones and the tens places should b...

code-golf algorithm

MD XF

05:23

Two years later, my lang outgolfs Dennis

Oh well never mind apparently I need to read the second page of answers >.<

Downgoat

06:05

Cans someone try to validate the certs at: googleapis.com/oauth2/v3/certs

Their values seem to be bogus

seshoumara

08:14

morning

@Dennis the Hello, World! sed example on TIO can be golfed down by 5 bytes to cHello, World! :D

Mr. Xcoder

09:24

Well most of the "Hello, World!"s aren't the shortest

Marcus Andrews

09:36

is there a short way to add spaces between consecutive letters in a string?

i.e. only between a-z type letters?

I tried print gets.gsub /([A-Za-z])([A-Za-z])/,'\1 \2' but it seems to be nonoverlapping

seshoumara

sed -r ':;s:([a-z])([a-z]):\1 \2:;t'

but I wouldn't call that a short way

Mr. Xcoder

09:52

@MarcusAndrews Example?

Marcus Andrews

I ended up just looping over it twice

e.g. "word! numb3r" -> "w o r d! n u m b3r"

Mr. Xcoder

Oh so symbols/numbers should be left in-place, and adjacent letters separated.

seshoumara

my sed example is looping as many iterations as it takes to separate all adjacent letters, but per iteration it does only one pair

Mr. Xcoder

@MarcusAndrews How about "Rbe" -> "R b e" or "Rb e"?

nvm

Marcus Andrews

R b e

case-insensitive

seshoumara

09:59

aaa, you initially said only between a-z letters

Marcus Andrews

I wasn't sufficiently clear, sorry -- my original regex has A-Za-z though

seshoumara

then likewise sed -r ':;s:([a-Z])([a-Z]):\1 \2:;t'

so have you tried a-Z instead in your regex?

Marcus Andrews

I ended up doing
a=gets
(0..1).each{a=a.gsub /([a-z])([a-z])/i,'\1 \2'}
puts a

/i for case insensitive afaik

seshoumara

what language is that?

Marcus Andrews

ruby

seshoumara

10:05

and a-Z isn't working?

Marcus Andrews

prob. would, didn't know you could do it like that

too used to seeing "A-Za-z" i suppose

seshoumara

could be a sed thing maybe

Simply Beautiful Art

11:46

Say, does anyone think it would be possible to have a better version of the Largest Printable Number challenge, seeing as many of us do not like the rules?

Simply Beautiful Art

12:02

I'm interested in a 256 byte limit, where you may use digits and constants, but you can't use constants larger than 10. The output (to stdout) must be theoretically finite and deterministic and the program must theoretically terminate for any sufficient amount of resources for your program to run (resources include very large bigint or int, time, memory, etc.) Finally, the only operations allowed will be +, -, ×, ÷, so you can't call the Ackermann function unless you define it within your program.

Anonymous

> many

Anonymous

citation-needed

Simply Beautiful Art

Okay, maybe not many, but certainly a few people.

Anonymous

I think that the challenge is a fine challenge. It has a few shortcomings, but not enough to warrant a rewrite. Also, what you're proposing would probably be a different enough challenge that it wouldn't be a dupe. Also also, you might want to include modulo (%) in the allowed operations. Also also also, what about nullary functions that return larger-than-10 constants (e.g. lambda: 1000 in Python)? If there was one built-in to the language, would it be allowed?

Anonymous

What about functions that return a large number regardless of their argument(s)?

Simply Beautiful Art

12:14

Citation found:

5

Q: Is there a decent "largest number" question on the site?

The question largest number printable is broken in many ways: it has a huge number of source restrictions and a strange scoring function. Many of the other largest number challenges are like this in one way or another. I was wondering if we should create a canonical question that fits the moder...

discussion

Anonymous

@SimplyBeautifulArt There are only a few upvotes on each of the answers that says it's not good. The challenge itself has 107 upvotes. That's still not "many" by any stretch of the imagination.

Simply Beautiful Art

@Mego Any constant defined within the program may be used, if that's what you meant on the nullary functions.

If it were built-in, then no.

Anonymous

@SimplyBeautifulArt But they're not constants, though. There's a lot of rules-lawyering that can go on to find loopholes. The spec would have to be very specific.

Simply Beautiful Art

@Mego I think that should be fine.

@Mego Perhaps. But the restrictions on the current one does not give room to much mathematical creativity for me.

Anonymous

What about a nondeterministic function that takes two arguments n and m and returns 9 99.99999999999999% of the time, but the rest of the time returns A(n, m)?

Simply Beautiful Art

12:19

@Mego R.I.P., because I'm certainly not good enough as far as programming to make very specific specs.

9

Q: Is it okay if a submission has an extremely small chance of not functioning properly?

For instance, consider the following un-golfed submission in c to some code-golf challenge requiring the use of a while looping construct: void function() { int a, b; while(a != b) { // Do something } } Although the while loop would be invoked most of the time, there is...

discussion

I'll say no.

If no-one catches it then whatevers tho

Anonymous

The point of this is that there's a lot of room for loopholes in any attempted spec for that kind of challenge. The fact that the original challenge turned out decent despite all the rules-lawyering is impressive.

Simply Beautiful Art

lol

Well, what other sorts of loopholes are you thinking of?

Since I clearly can't come up with them on my own.

Oddly, I don't see any rules that require the output to be deterministic on the current challenge we have.

Anonymous

The few that I pointed out are the obvious ones to me. To find more, I'd have to expend mental energy, which is in short supply because my coffee is still brewing.

Simply Beautiful Art

Lol, okay, thanks anyways.

caird coinheringaahing

13:57

CMP: Should the inverse of the alphabet string be it reversed, or it uppercased?

Anonymous

@cairdcoinheringaahing Reversed

user202729

I notice that when you: (in that particular case, also applies to other similar situations)
* hover over cairdcoinheringaahing's message
* click at the [V] button on the left
* choose [Reply to this message]
Mego's message below will be permanently highlighted, until you let the mouse pointer in and out cairdcoinheringaahing's message again or refresh the page (at least on Chrome)

Simply Beautiful Art

Well yeah

caird coinheringaahing

14:17

And what is the inverse of a newline?

Anonymous

@cairdcoinheringaahing Carriage return

NieDzejkob

@user202729 Reproduced on Firefox

Mr. Xcoder

Same on safari

caird coinheringaahing

And one last question: inverse of a space?

Mr. Xcoder

Newline?

What is this for? Drst?

caird coinheringaahing

14:22

@Mr.Xcoder Levant

Mr. Xcoder

Is anything missing on this page except for the z and y atoms which I'll add later today?

user202729

Although it is named so, why is Ȧ "any and all" and not just "all"? The "any" part is misleading.

^ I may be mistaken.

Leaky Nun

because [] gives you false there

whereas "all" would give true for []

Mr. Xcoder

@user202729 Because Dennis borrowed it from Octave

user202729

So they are only different when the flattened array is not empty?

Leaky Nun

14:28

@user202729 presumably so

user202729

Ok so that makes sense. Add an explanation why it is named so would be useful.

Like, "this is a monad that returns 1 if there is any element in the flattened array and all the elements are truthy, 0 otherwise."

Mr. Xcoder

Yes, I am planning to change that

But later

CMC: Given a list of positive integers L, check whether the count of primes that appear in the prime factorization of at least one element in L exceeds the length of L.

Can't add test cases rn

user202729

@SimplyBeautifulArt Are you intentionally pop yourself up the top of the online user stack?

Simply Beautiful Art

@user202729 no

I have the tendency to forget to leave rooms when changing computers

And the sounds of pings makes my brother go crazy

user202729

So you can turn it (the sound) off.

Simply Beautiful Art

14:37

But I want the sound

user202729

@Mr.Xcoder Jelly, 7 bytes: Try it online!

Very often I turn off computer sound, so the first time I hear the ping sound, I was surprised. I turn it off since then.

Mr. Xcoder

@user202729 I don't think that's valid?...

user202729

@Mr.Xcoder Sorry I misread the specification.

Thomas Ward

beats head against computer

anyone want to write python for me :P

Simply Beautiful Art

@user202729 The annoyingness helps me respond to chat when I'm watching anime/YouTube lol

Mr. Xcoder

14:42

@ThomasWard Maybe I can help, depending on the problem

user202729

I can be notified when I look at the title-bar that says (<nonzero finite ordinal>*) The Nineteenth Byte | chat.stackexchange.com, because I don't often make video fullscreen.

@Mr.Xcoder Jely, 7 bytes: Try it online!

Thomas Ward

@Mr.Xcoder i need to strip apart an email message, and retain only a handful of headers but all of the payloads including attachments, and then rebuild the message so that it's DMARC compliant. I'm struggling on the "retain all of the payloads" part :/

Mr. Xcoder

Oh then I definitely cannot help

Thomas Ward

welcome to my life >.>

i'mma have to run this through a test message

with attachments

then write to another message and see if it creates a proper email message

THEN run that through a mail server to test

blurgh i have a headache

user202729

@ThomasWard Example? Is it internet-related or something? Or just string-processing task?

Thomas Ward

14:46

coffee would help but there's none until 11Am

New Main Posts

0

Q: Minimum rectangle cover

Rectangle covers Suppose you have a matrix of bits, for example the following. 1 1 0 0 0 1 1 0 1 1 1 1 0 1 1 1 0 1 1 1 0 1 1 1 1 1 0 1 1 1 1 0 1 1 0 1 1 1 0 1 We would like to find a rectangle cover for this matrix. It is a set of rectangular subsets of the matrix that don't contain any 0s, b...

code-golf matrix optimization

Thomas Ward

@user202729 sorta both, but it's email message processing, which is very tricky.

And fragile as all hell.

New Meta Posts

15:40

1

Q: Is outputting a Maybe acceptable in Haskell?

Haskell has a very strong type system, so there is a type called Maybe to work around some restrictions. Essentially, instead of erroring out, a function can return a Maybe that is either a Just x where x is the intended output or it can return Nothing, which indicates that there is no possible ...

discussion policy

caird coinheringaahing

Should the inverse of a² be √a or 2ᵃ form a golfing language perspective?

user202729

2^a can be expressed as 1<<a, so if you had shiftleft, then no.

caird coinheringaahing

@user202729 I have bitshifts, so √a?

mınxomaτ

17:08

Does anybody else experience massive memory problems with the latest Chrome? Like, here's a screenshot of my current chrome task manager. The browser eats over 2G of RAM, while all tabs and extension never even reach 60M...

Marcus Andrews

Given a string, replace any lowercase letter with a-that letter, any uppercase letter with A-that letter, and any digit with 0-that number

"Db2" -> "ABCDab012"

Leaky Nun

@MarcusAndrews Pyth, 26 bytes: ssmCM}@JCM"a0A"smg-dk0JdCM

Marcus Andrews

17:24

my current python:

s=""
for c in input():
 s+=''.join(map(chr,range(65+32*c.islower(),ord(c)+1)))if c.isalpha()else"0123456789"[:int(c)+1]
print(s)

129

print(''.join(''.join(map(chr,range(65+32*c.islower(),ord(c)+1)))if c.isalpha()else"0123456789"[:int(c)+1]for c in input()))
125

dzaima

@MarcusAndrews SOGL, 22 bytes: ,{6*6/:GWH'⁸÷'⁸*IWFΝ∑p

Leaky Nun

@MarcusAndrews 93: print("".join(bytes(range([48,65,97][(96<s)+(64<s)],s+1)).decode()for s in input().encode()))

Marcus Andrews

wow!

Leaky Nun

if you accept bytestring output: 83 bytes: print(b"".join(bytes(range([48,65,97][("9"<s)+("Z"<s)],ord(s)+1))for s in input()))

Marcus Andrews

Another challenge: You're given a point A,B, and then n lines follow. Each line has x,y,r, the parameters for a circle. Output how many of these circles contain point A,B.

My current Ruby (117):

a,b=gets.split.map(&:to_i)
s=0
gets.to_i.times{x,y,r=gets.split.map(&:to_i);s+=(((a-x)**2+(b-y)**2)**0.5<=r)?1:0}
p s

sample input:

0 0
2
0 0 1
0 0 2

Leaky Nun

17:42

54 bytes: lambda x,y,a:sum((x-h)**2+(y-k)**2<r*r for(h,k,r)in a)

caird coinheringaahing

17:56

CMP: What production language should I learn after Python?

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Output the first digit of Graham's number Code golf Write a program that will output the first digit of Graham's number (and nothing else), terminate and produce no error. I'll be lenient about loopholes. But if your submission is something like print("4"), the burden of proof will be on you.*...

muddyfish

Python is a production language

Marcus Andrews

18:20

How do I fix this ruby syntax?

n,r=gets.split.map(&:to_i)
puts n.times{|i|i*r}.to_c.join(" ")

trying to print a space-delimited arithmetic sequence, n terms, common difference r, starting at 0

Mr. Xcoder

@cairdcoinheringaahing Maybe JS, C or Swift

Ooops, it might actually be invalid... Yes it is

@cairdcoinheringaahing Python 2, 15 bytes print input()*2

Jelly, 1 byte

or ƓḤ if you want STDIN

mınxomaτ

18:48

TIL GitHub archived repos

Adám

19:50

@cairdcoinheringaahing Your profile doesn't say which ones you know.

@user202729 Sensible behaviour to avoid ninjas.

caird coinheringaahing

20:09

@Adám Python

And am learning APL, before you suggest that :P

> using only ASCII characters.

Mr. Xcoder

My python one stands

Adám

@cairdcoinheringaahing Then it depends on a lot. If you want breadth, I'd suggest Haskell or Perl. If you want low level, then C-something, or even a type of assembler. If you want a job, maybe Java ;-) If you want to golf, Jelly, obviously.

caird coinheringaahing

@Adám See, I know that APL can open job offers, and is good for golfing, and could be considered low-level (?), so either Haskell, Perl or APL :P

Adám

@cairdcoinheringaahing APL is hardly low-level, though. You have no direct access to memory or even data types (though you can tell APL that you want a specific type). Well, I guess you've chosen already anyway…

caird coinheringaahing

@Adám Well, I'm still deciding between continuing APL, or learning Haskell or C :P

Adám

20:17

@cairdcoinheringaahing I'm biased.

@cairdcoinheringaahing Still, I think the ratio of available programmers to needed programmers favours APL these days.

Marcus Andrews

n*(d*(n-1)+2*m)/2

can this be shortened?

Adám

@MarcusAndrews n*(d*(n-1)/2+m)

Marcus Andrews

hm n*(d*n-d)/2+m*n perhaps

or is there a short perl method for accepting 3 int inputs on the same line?

Trying to make a short codegolf for the sum of an arithmetic sequence

dzaima

20:32

@MarcusAndrews n*(d*~-n/2+m)

Adám

@dzaima What is~?

caird coinheringaahing

@Adám Bitflip (~n == -n-1)

Adám

@cairdcoinheringaahing Oh, I forgot to check the chat log which language MA was using. Thought he meant math.

caird coinheringaahing

21:43

Anyone know how to see how close I am to the silver code-golf badge? The profile page is really unhelpful

Uriel

@cairdcoinheringaahing look on the top tags, at the score. you currently have 149 for codegolf, which means 251 til silver

caird coinheringaahing

@Uriel Thanks

caird coinheringaahing

22:14

Q: Should I add checking for en passent to my "Is it a valid chess move?" question?

Destructible Lemon

22:36

yes

New Sandboxed Posts

23:08

0

A: Sandbox for Proposed Challenges

Validate a StarCraft II Build Order code-golf decision-problem game Explanation You must decide whether the input represents a valid StarCraft II Build Order. Here is how you will decide: Start with the first word (it will be the race, Zerg, Protoss, or Terran) Set the list of valid units to...

0

A: Sandbox for Proposed Challenges

ChessMoveQ Given a list of up to 32 elements, each consisting of 4 elements, and a second list with 4 elements, determine whether the move detailed in the second input is a valid chess move. The first list indicates the position of all 32 pieces on the board. Each element will follow the struct...

Stewie Griffin

DJMcMayhem

Impressive

Stewie Griffin

I believe one of those views is my own... So someone votes three times maybe? :P

New Main Posts

23:25

3

Q: The lowest initial numbers in a Fibonacci-like sequence

Given a positive integer input N, output the two non-negative numbers, a and b with the lowest possible mean value that will result in the number N being part of the recurring relation sequence: f(0) = a f(1) = b f(n) = f(n-2)+f(n-1) In case there are more than one solution then you should out...

code-golf number permutations

Calvin's Hobbies

23:58

Is it wrong to say x^2 grows exponentially or is that only for things like 2^x?

Transcript for