@ATaco btw MathQuill userscript still doesn't work when copy+paste. Maybe make $$ the command to start it? Also can u bring back /$$ to start MathQuill :3 (also can u add .message class to the preview so it is compatible with ppcg design userscript)
Where do I live? code-golf geography*
Given a coordinate pair, supporting at least 2 decimal places (precision .01), determine the country containing that coordinate pair. The coordinate will be on land and will be at least 0.5 degrees from any border or coastline.
Input will be given as two de...
Hi everyone, I had posted a popularity-contest challenge in the sandbox and after looking at the response, I have now changed it to a code-golf. I am asking for feedback from the users to see if the edited challenge is something that people will enjoy or not. Please leave your responses in the comments below the challenge. Here it is. codegolf.meta.stackexchange.com/questions/2140/…
(cc @WheatWizard since you're good at math) is there a (dyadic) mathematical operator of some sort over the integers such that given the result of applying the operator on X and Y you can determine X and Y from the result?
I'm fairly sure it's possible but I'm not sure if something like that exists.
I did think about the "counting the library byte-count" part long and hard and couldn't come up with a solution. What is the best thing to do here? Should I allow all libraries? Should I only allow the "canonical" libraries which are standard included? How do I phrase this? What is the best way criteria here and what is the best way to state it?
@FixedPoint The best idea is to allow libraries. I don't know what problem you are trying to solve by penalizing libraries but I can say with a fair amount of confidence that it won't be solved.
Draw translucent boxes code-golf string ascii-art
I'm not sure if this should be an ascii-art because it uses non-ascii characters.
Given a list of four-tuples representing the corners of rectangles, draw translucent rectangles over each other in that order.
What do I mean by "translucent re...
Yeah I made the challenge here, I don't think it's dupe but idk
Also the Cantor Pairing Function only works on natural numbers but my challenge requires all integers (though you can just use the bijection between integers and positive integers)
great I can't remember what my fourth challenge idea was
Design a commutative bijection between any infinite set and unordered pairs thereof code-golf math
Related, but this only requires positive integers and does not have to be commutative
The Cantor Pairing Function is described in this Wikipedia article. Essentially, it is an operation such that ...
Working on my latest challenge, I realized that I don't know what is the optimal way of providing/formatting the test cases. So the question is, what is the best way for a challenger to provide test cases for a challenge?
Consider that
the formatting should be such that if people simply copy a...
Oops, Auto-correct.
You have a word. But it's wrong. You wonder what word it would be. Thankfully, being a code golfer, You can make a code to take a rough guess.
I/O
You will be given a (wrong, all lowercase) word, and a '(All lowercase)Dictionary list'. You have to output the word with t...
@Downgoat if you search any phobia you'll probably find pictures of it (I tried claustrophobia) because there's nothing associated with the lack of something scary :P
@Nobody Once your interpreter (kind of) works, you contact Dennis in the TIO chat room. Ask him to add your language, tell him where to find the interpreter, and how he should call the interpreter with the user's code.
Pythagorean Double Regex
Posted by NH. in Zendo:
though depending on the regex flavor, things like that pythagorean triple could be hard to do.
The rule in question was:
Given a pair of numbers, match if the two numbers are part of some integral Pythagorean triple, else don't match.
...
Background
The deltas of an array of integers is the array formed by getting the differences of consecutive elements. For example, [1, 2, 4, 7, 3, 9, 6] has the following deltas: [1, 2, 3, -4, 6, -3].
We will now define the deltas of a matrix of integers as the deltas of each row and each colum...
The London Underground A.K.A. The Tube is the oldest underground railway in the world, it currently consists of eleven lines* servicing 267 named stations (strictly 269** stations since "Edgware Road" and "Hammersmith" each occupy two locations)
The challenge
Output the names of the lines servi...
Nth Differences number math code-golf
In math, one way to figure out what the type of a given relation (linear, quadratic, etc) is to calculate the differences. To do so you take a list of y values for which the gap between the correspondent x values is the same, and subtract each one from the ...
@Downgoat I don't know swift, but I know JS ain't swift, literally and figuratively. You could try using a memoized getter, but outside of getters, I doubt there is much you can do while maintaining that syntax. You could try proxies, that might help
@Downgoat uh, from the docs it says that a getter defers the cost of calculating the value until the value is needed, and if it is never needed, you never pay the cost.
Weirdo Incorporates have a weird way of grading their staffs by the number of days they were present in the office:
0 - 13 : F
14 - 170 : E
171 - 180 : D
181 - 294 : C
295 - 300 : B
301 - 365 : A
Note: The range is inclusive (i.e. 0-13 means 0 days and 13 days both will evaluate
as grade ...
Given a positive integer (0 and above, no maximum), convert it into a grade following these rules:
A = 100+
B = 90 - 99
C = 80 - 89
D = 70 - 79
E = 60 - 69
F = 59 and less.
This felt a little boring, so make the grade a + if it's 7,8 or 9 and a - if it's 0,1 or 2. Ignore this for the...
@cairdcoinheringaahing I agree, but I enjoyed working to a strict byte limit even if the output was open ended. It seems that similarly broad popcons have escaped closure...
@cairdcoinheringaahing Why thank you! But if you're talking about the one with most votes, that's just because it was the first one I posted so it went to the top and gathered votes. Others that were posted later (both my own and others) were far more interesting (and challenging - hence posted later). I answered 6 times altogether...
@Mr.Xcoder If broad counts as bad, then the allrgb pop con was equally broad as tweetable mathematical art: strict restriction but no specification of the output
@cairdcoinheringaahing From other people's, if you liked the tablecloths they are nothing compared to this raytraced checkered sphere, and my personal favourite is the buddhabrot
Ah. Pop cons might get more votes (even on the challenge) due to being about popularity, so hard to say. A pop con with 20 votes might not be as significant as a golf challenge with 20 votes...
Also more popular (upvoted) pop cons aren't always more interesting/well written
This is a conjecture proposed by Paul Erdős and Ernst N. Straus where it simply defines for any x >= 2, then:
4 1 1 1
--- = --- + --- + ---
x a b c
where a, b, and c are whole numbers (positive integers).
For example, if x was 5 then:
4 1 1 1
--- = ---...
I have a page that echo same result multiple times just according to query quantity example:
id | qty | name
1 | 4 | gun
2 | 3 | jet
3 | 5 | cup
result:
gun gun gun gun
jet jet jet
cup cup cup cup cup
code:
<?php
session_start();
include "mys...
R, 6 bytes
As a statistical programming language, it's not surprising that R has a built-in for k-means clustering.
kmeans
This is a function with two obligatory arguments, x (the points, i.e. P) and centers (the number of clusters, i.e. K). More details here.
Collectibles, Inc king-of-the-hill
Collectibles, Inc is going out of business! They maintained the largest collection of collectible items, and now they are all going up for auction. You want as many collections as possible.
There are P players, each with 30 gold. Collectibles, Inc has P*2 c...
Print as many powers of 2 as you can with just 7 characters in the language of your choice.
You lose 0.1 points for every non-power of 2 printed, and gain 0.5 for every power of 2 printed.
@2EZ4RTZ The main problem is the number of loopholes that can be exploited. The OP probably has never heard of golfing languages and was thinking mainly about Perl and production languages that can golf
@2EZ4RTZ Because VTC says that you have a problem with answering it, that something is stopping you from answering it. You can't then VTC and go ahead and answer.
Where do I live? code-golf geography*
Given a coordinate pair, supporting at least 2 decimal places (precision .01), determine the country containing that coordinate pair. The coordinate will be on land and will be at least 0.5 degrees from any border or coastline.
Input will be given as two de...
Working on my latest challenge, I realized that I don't know what is the optimal way of providing/formatting the test cases. So the question is, what is the best way for a challenger to provide test cases for a challenge?
Consider that
the formatting should be such that if people simply copy a...
Oops, Auto-correct.
You have a word. But it's wrong. You wonder what word it would be. Thankfully, being a code golfer, You can make a code to take a rough guess.
I/O
You will be given a (wrong, all lowercase) word, and a '(All lowercase)Dictionary list'. You have to output the word with t...
Pythagorean Double Regex
Posted by NH. in Zendo:
though depending on the regex flavor, things like that pythagorean triple could be hard to do.
The rule in question was:
Given a pair of numbers, match if the two numbers are part of some integral Pythagorean triple, else don't match.
...
Background
The deltas of an array of integers is the array formed by getting the differences of consecutive elements. For example, [1, 2, 4, 7, 3, 9, 6] has the following deltas: [1, 2, 3, -4, 6, -3].
We will now define the deltas of a matrix of integers as the deltas of each row and each colum...
The London Underground A.K.A. The Tube is the oldest underground railway in the world, it currently consists of eleven lines* servicing 267 named stations (strictly 269** stations since "Edgware Road" and "Hammersmith" each occupy two locations)
The challenge
Output the names of the lines servi...
Nth Differences number math code-golf
In math, one way to figure out what the type of a given relation (linear, quadratic, etc) is to calculate the differences. To do so you take a list of y values for which the gap between the correspondent x values is the same, and subtract each one from the ...
Given a positive integer (0 and above, no maximum), convert it into a grade following these rules:
A = 100+
B = 90 - 99
C = 80 - 89
D = 70 - 79
E = 60 - 69
F = 59 and less.
This felt a little boring, so make the grade a + if it's 7,8 or 9 and a - if it's 0,1 or 2. Ignore this for the...
This is a conjecture proposed by Paul Erdős and Ernst N. Straus where it simply defines for any x >= 2, then:
4 1 1 1
--- = --- + --- + ---
x a b c
where a, b, and c are whole numbers (positive integers).
For example, if x was 5 then:
4 1 1 1
--- = ---...
R, 6 bytes
As a statistical programming language, it's not surprising that R has a built-in for k-means clustering.
kmeans
This is a function with two obligatory arguments, x (the points, i.e. P) and centers (the number of clusters, i.e. K). More details here.
Collectibles, Inc king-of-the-hill
Collectibles, Inc is going out of business! They maintained the largest collection of collectible items, and now they are all going up for auction. You want as many collections as possible.
There are P players, each with 30 gold. Collectibles, Inc has P*2 c...
Print as many powers of 2 as you can with just 7 characters in the language of your choice.
You lose 0.1 points for every non-power of 2 printed, and gain 0.5 for every power of 2 printed.
