The Nineteenth Byte

12:46 AM

@Neil Agreed, last year I got many hats without trying to - this year I haven't gotten any without trying to

Anonymous

@Quintec I've gotten 5, and I've actually put effort towards getting hats. A lot of the hats are tied to badges, which means it's hard to get them on sites where you already have a lot of rep/badges.

Quintec

I've gotten 4 not counting still fresh(where trusted user rep counts for some reason) and the one to view SO's team page. 1 silver badge from chat, 2 top hats for answering, and 1 for answering where I'm a new contributor.

I still haven't figured out the retro fan hat though

Anonymous

@Quintec spoilers

Quintec

...oh

DJMcMayhem

1:06 AM

@DJMcMayhem Since no one took me up, Python 3, 59 bytes: Try it online!

ASCII-only

1:50 AM

anyone good with Groovy here?

quartata

whats up

ASCII-only

what's this replying to

Downgoat

2:37 AM

@ASCII-only depends

Downgoat

3:49 AM

@Οurous do you know if Clean has an SVG logo available?

Οurous

5:11 AM

@Downgoat not off the top of my head but I will investigate over the next day or so.

quartata

5:29 AM

@ASCII-only you wanted groovy help

ASCII-only

6:00 AM

@quartata oh yeah. are there any cast to int hacks or something? or alternative closure syntaxes

oh. the most important one: is there something like python's a[:x] (anything shorter than a[0..<x] that is

... goddamnit this guy doesn't log in except to post answers

quartata

6:15 AM

@ASCII-only as int?

dont know what you mean exactly but

@ASCII-only .take(x) is longer by a byte

so i dont think so

ASCII-only

@quartata i mean shorter than that. i guess not

quartata

no i know

i was just saying the other idiomatic way i knew

oh you meant as int

theres also .trunc() but thats not likely to be shorter

that returns another float actually. forgot.

so its like floor

ASCII-only

>_> oops. i meant string -> int

anyway. time to move on to the scala one

quartata

oh

i just assumed

subtract on string acts like set difference

so no weird JS coercion if thats what you were looking for

its like a normal collection

ASCII-only

also. is replaceAll with closure a groovy thing only :/

New Sandboxed Posts

8:02 AM

0

A: Sandbox for Proposed Challenges

How many consecutive descending numbers in my number ? 2019 is coming and probably eveyone has noticed the peculiarity of this number : it's in fact composed by two sub-numbers (20 and 19) representing a sequence of consecutive descending numbers. Challenge Given a number x, return the length ...

New Main Posts

10:21 AM

0

Q: All the digisibles

A natural number (written in the decimal base) is qualified as digisible if and only if it fulfills the following 3 conditions: no of its digits is zero, all the digits that compose it are different, the number is divisible by all the digits that compose it. The challenge is to output all the...

Neil

@DJMcMayhem 55 bytes

Mr. Xcoder

@Neil @DJMcMayhem 49 bytes (Py2)

Neil

don't you mean a%4?

Mr. Xcoder

Oh oops

47

New Sandboxed Posts

11:03 AM

0

A: Sandbox for Proposed Challenges

Check List for Duplicates code-golf Given a non-empty list of integers, return a truthy value if all entries are unique, and a falsey value of there are duplicate entries (or vice versa). Examples [1,2,3] -> false [1,1,3] -> true [1] -> false [1,3,1,5] -> true META: I couldn't find this as ...

New Main Posts

11:52 AM

0

Q: Count the contiguous submatrices

Migrated from chat Given two non-empty non-negative integer matrices A and B, answer the number of times A occurs as a contiguous, possibly overlapping, submatrix in B. Examples/Rules 0. There may not be any submatrices A: [[3,1], [1,4]] B: [[1,4], [3,1]] Answer: 0 1. Submatrices must ...

code-golf array-manipulation matrix search

Adám

Is this an interesting challenge? Given a list of strictly positive integers, return the integer that contributes most to the list's sum. E.g. [3,1,1,1,1,1,1,5,9,2,6,5,3,5,8] → 5 (as it contributes 15, while 1 occurs more often, it only contributes 6).

Erik the Outgolfer

12:09 PM

Free hat!

betseg

12:37 PM

0³+1⁸+2⁷+3⁹+4⁶+5⁴+6²+7⁵+8¹+9⁰=2019
1⁴+2⁴+3⁴+5⁴+6⁴=2019

Adám

Spice it up a bit? Given a matrix of non-negative integers, return the indices/mask/values of unique rows that contribute most to the total sum of elements in the matrix. E.g. [[1,2,3],[2,0,4],[6,3,0],[2,0,4],[6,3,0],[2,0,4]] → [2,3] or [false,true,true] or [[2,0,4],[6,3,0]]

Leaky Nun

@Adám what does [2,1,1] return?

ngn

@Adám k: {&h=|/h:+//'x@=x} for both versions

ngn

1:39 PM

^tio link

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

WIP: Shortest JsFuck code for a number JsFuck is a language using only []()!+ to run and express anything in JavaScript. Below is a simplified model of JavaScript to express numbers: Types Number String Boolean (true) Array Functions IEEEdouble(x): Let \$u\$ is the number in \$\{a\cdot ...

Mr. Xcoder

2:35 PM

@Adám 05AB1E, 7

Husk, 5

@Adám Pyth, 10

Adám

2:50 PM

@Mr.Xcoder Hm, too trivial apparently. It was mean for feedback, not CMC :-)

Mr. Xcoder

It's not necessarily "trivial", you know that golfing languages sometimes just have the appropriate tools for the job. That's not the case in Python/Java/C/other mainstream languages because they (1) don't have built-in "group elements of list by" commands (2) don't have built-in "select elements that yield maximal results from list" commands. It's indeed easy-ish but definitely sufficient even for main

That is, if you really intend to post it

Adám

@Mr.Xcoder I suppose the latter is more interesting, right? Would it make better to bump the number of dimensions even higher, or make it variable?

@LeakyNun Since it isn't a full spec/CMC, I have not decided yet. Could be a) 2 or b) any of 2 or 1 c) [2,1]

Mr. Xcoder

3:06 PM

@Adám It's not much of a difference in my opinion (e.g. my Pyth answer can be modified by 2 or 3 bytes to make it compatible to the other version), but I'm honestly not a fan of extraneous dimensions. IMO you should stick to the matrix case, but of course the decision is yours

Adám

@ngn You can remove the & for the second one, no?

ngn

@Adám if your spec accepts dicts, yes

i mean, dicts in which the values are booleans

Adám

@ngn I'm a fan of super flexible I/O, so I'd allow anything that clearly and unambiguously shows which.

betseg

Got 81 in python with itertools.groupby

81 including import

maxb

Before all celebrations start and I forget, Happy New Year! I created my account earlier this year, and I've felt really welcome by the community, and I've learned a lot both about golfing, constructing languages, and general programming. Thanks for 2018!

10

Adám

3:18 PM

5779 chugging along…

Mr. Xcoder

@betseg For which version?

betseg

3

Mr. Xcoder

For the very first version of the challenge and returning one of the elements that fulfil the criteria I have 41 in Python

betseg

Oh wow

I got worse after not golfing for half a year

Adám

Hold your horses, I'll post to main…

Mr. Xcoder

3:21 PM

@betseg Erm but I mean 41 for this one:

3 hours ago, by Adám

Is this an interesting challenge? Given a list of strictly positive integers, return the integer that contributes most to the list's sum. E.g. [3,1,1,1,1,1,1,5,9,2,6,5,3,5,8] → 5 (as it contributes 15, while 1 occurs more often, it only contributes 6).

I haven't solved the generalization

betseg

Uh I got 81 for that too yes

Mr. Xcoder

Ok then, just making sure

But unfortunately this technique cannot be ported with ease to the other version of the challenge :(

betseg

Same

Adám

Good title for the matrix version? Most contributing rows?

Mr. Xcoder

That's good.

quartata

3:44 PM

Capybaras chilling in a hot yuzu bath in winter is the most soothing scene imaginable, please enjoy https://t.co/Enz3v3oate

Tweeted by lauraehall on December 26, 2018 at 5:31 PM

betseg

@Mr.Xcoder ok, got 153 for the latter, sadly not a lambda

New Main Posts

0

Q: Most contributing rows

Given a non-empty matrix of non-negative integers, answer which unique rows contribute most to the sum total of elements in the matrix. Answer by any reasonable indication, for example a mask of the unique rows order of appearance (or sort order), or indices (zero- or one- based) of those, or a ...

code-golf matrix subsequence

Mr. Xcoder

4:01 PM

Damn, the challenge was posted right after I left home :/ and the solution was on my computer... Eh I guess I'll post it tomorrow.

Adám

@Mr.Xcoder Sorry.

Mr. Xcoder

You've got nothing to be sorry about

I'll post the pyth one anyway

Adám

I'm surprised that nobody has answered my previous challenge in APL yet. My shortest solution is short enough to brute-force.

Mr. Xcoder

@betseg 145 for your solution.

Skidsdev

I wonder if a Factorio Belt Balancer generator would be an interesting challenge

Adám

4:23 PM

@Skidsdev Can you elaborate?

Skidsdev

@Adám I'm writing up a Sandbox post now, it might be a bit too complex, we'll see

Erik the Outgolfer

4:40 PM

@Adám by "appearance/sort order", you mean that the indices can also refer to the sorted list of the input's unique elements (instead of kept in original order)?

Adám

@EriktheOutgolfer yes. Anything I can do to make that more clear?

Erik the Outgolfer

@Adám so the second test case's output can as well be [1]/[2]

Adám

@EriktheOutgolfer Ah, right, and the boolean can be [0,1,0].

New Sandboxed Posts

5:07 PM

0

A: Sandbox for Proposed Challenges

Collapsing numbers Couldn't find this on here nor oeis.org.. code-golf, integer, sequence Let's define the a function on natural numbers \$n\$, written as base 10 digits \$d_k\; d_{k-1}\; \dotsc\; d_1\; d_0\$, as follows: As long as there are equal adjacent digits \$d_i\;d_{i-1}\$, replace ...

Sandbox

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