Challenge
Given a string such as Hello World!, break it down into its character values: 72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100, 33.
Then calculate the difference between each consecutive pair of characters: 29, 7, 0, 3, -79, 55, 24, 3, -6, -8, -67.
Finally, sum them and print the ...
I think that, in general, banning builtins to any degree tends to make the challenge harder but not more interesting, which is a net negative, I believe.
Would there be technical limitations of an ISP that sells internet up/download bandwidth based on the total amount? So the user can choose (say every day or at least every month) what their respective up/down bandwidths should be as long as they total to the same thing? e.g. You could have a total of 40Mbps and one day set it so download is 35 and upload 5, then another day make download 10 and upload 30.
Because as a video maker I'd gladly trade decreased download speed for increased upload speed :/
Brain-Flak, 48 bytes
{([{}]({})<>)<>}<>{}([]<>){({}[()])<>({}{})<>}<>
Try it online!
This ones a little bit harder than my other answer, haha. Lets walk through it.
{ While the top of the stack is nonzero:
( Push:
[{}] The top of the stack * negative one. Pop...
@HelkaHomba Depends on the type of connection. Notably, ADSL (asymmetric DSL) won't give you great upload speeds because the upstream is encoded in the crappy part of the signal.
Credit
My thanks to Rand Al'Thor's letter-based question for the inspiration for this code-golf challenge.
Background
The nature of this challenge is based off the algorithm mentioned by Rand in his "A Triangle Formed of Three Letters":
Start with a sequence of 10 letters each of which ...
This sentence employs two a’s, two c’s, two d’s, twenty-eight e’s, five f’s, three g’s, eight h’s, eleven i’s, three l’s, two m’s, thirteen n’s, nine o’s, two p’s, five r’s, twenty-five s’s, twenty-three t’s, six v’s, ten w’s, two x’s, five y’s, and one z.
There is an ArrayList of large number of positive integers (sorted). Now it needs to be divided into two non-empty ArrayList. Find the two such ArrayList, let the difference of the sum of each ArrayList be the largest (or smallest), and what is the complexity in time?
URL shorteners / shortened URLs
Every once in a while, we get a challenge that requires fetching some data from the internet. While some of them manage to ban URL shorteners in time, other don't. I propose to forbid them by default because of the following reasons.
URL shorteners that were cre...
Ever fancied creating cool twitter hashtags such as #brexit or #brangelina? this golf is for you.
Write a program that accepts two strings A & B as input and merges them according to the following algorithm:
let n be the number of vowels groups in A (e.g. britain has 2 vowels groups : i in p...
Feature request: a stack snippet on the loopholes thread that lists all "valid" loopholes according to vote totals/ratio.
Although, it might be nice to review if the "minimum +5 score, with at least 2/3rds majority" rule is actually the best way to do it, since it seems like that rule was just arbitrarily decided upon when the thread was posted.
Given how highly-upvoted everything is, it might be worth increasing the +5 requirement, or altering the required super-majority.
@HelkaHomba Hey your sideways world is fun. Thanks for sharing it! I'm playing in it with some friends rn, and it's a blast. Also, a tip. If you start to go up on the sand on the right, then dig into the ground, you'll find a cave with a bunch of coal. Hope it helps. :D
@ConorO'Brien I wish they were forbidden by default. I'm OK with using a Fibonacci built-in to solve some challenge related to Fibonacci numbers, but using it to calculate the n-th Fibonacci number is meh.
@HelkaHomba I think there is necessarily an imbalance between upload and download speeds (at least, if you're not doing anything contrived and "unnatural") solely because reading is faster than writing. It's generally much quicker to copy and send data than it is to create it.
@El'endiaStarman I get why ISP's do it that way normally, but for a growing ecosystem of online content creators, having the option to have upload speeds larger would be nice.
@HelkaHomba Well, which is greater, the rate of consumer growth or the rate of creator growth? (I'm actually not totally sure.)
@HelkaHomba I don't think I've ever heard anything but bad things about Comcast, so I think it's a safe bet to assume that they don't really make decisions rationally.
@flawr He blew my mind with the statement that derivatives are linear transformations/operators. I suddenly understood calculus a little better, especially why you could take the derivative of elements of a sum independently.
Incidentally, I've been trying to think of game mechanics in a more abstract manner lately, and I wonder if there's any possibility that I might be able to find or construct a vector space of game mechanics. One could probably develop some really interesting games that way.
I've also been pondering on games where the computer evolves or adapts to your playing style so the challenge constantly, but gradually changes.
What would be even better is if this evolution could include the core game mechanic, so that you could be playing a totally different game a week later or something.
Do you know your ABCs?
code-golf kolmogorov-complexity
Write a program or function that outputs this exact text, case-insensitive:
A, B, C, D, E, F, G,
H, I, J, K, L, M, N, O, P,
Q, R, S,
T, U, V,
W, X, Y, Z.
The output must look exactly the same as the above (again, case-insensitive), but m...
Handwriting Recognition
code-golf image-processing
The MNIST dataset is a series of handwritten digits used as a standard testbed for machine learning, pattern recognition techniques. Each image is of a single digit, 0-9; as a 28x28 pixel grayscale matrix with values from 0-255.
The challeng...
The challenge is simple: write a program or function that, when given a finite non-negative integer, outputs a nested array.
The rules
Your code must produce a unique valid nested array for every integer 0 ≤ n < 231.
Every possible nested array with up to 16 open brackets must be outputted w...
I think GGP could make for a cool KOTH, but it might be hard to secretly organize a dozen or so games for the entrants to play.
If we had a random game generator, then such a competition could be feasible. It's just a matter of having the generator be complex/holistic(?) enough that the competitors can't easily take advantage of it.
It might be more feasible/interesting if we limited it to specific categories of game, though, like card games / board games / abstract strategy games.
anyone know how to change the SSH port on a raspberry pi?
I just got one for my B-day and I'm setting up a port forward so I can use it through my laptop while I'm at school. I'd rather not use 22 because I feel more vunerable that way.
Tbh I don't know a lot about ssh or hacking. I just figure if 22 is good enough for millions of businesses and other personal users it's probably good enough for me.
Challenge
Given the symbol for a special set, output every number contained within that set.
Input
The input will be a single ASCII character: either P, N, Z or Q.
Output
Your output must be an infinitely increasing list of numbers separated by newlines. Depending on the input, your output m...
@AshwinGupta There are only 65536 ports, so trying to hide your SSH port won't achieve a lot. Just use a strong password or, better yet, an RSA key pair.
The Challenge
Given a string containing only lowercase or uppercase letters and no spaces.
=>You have to sum up the ASCII values for each character instance in the input string.
=>The sum up value will be converted to binary format.
=>And, the result will be the number of ones in the binary v...
That's a cool realization, isn't it? Then you should also look into the small but beautiful topic of the ring power series over a field (denoted by F[[X]], similarly to the polynomial ring F[X]). This forms a *discrete valuation ring* and there are very nice (and easy to understand) proofs about when a powerseries is (multiplicatively) invertible, or even invertible with regard to composition. And what the ideals look like etc.
This is a little bit more general than the polynomials but also gives some great insights! (Insights into calculus, but also into the beautiful properties of this r…
@TùxCräftîñg you have access to all of 32 stacks and 32 queues. to add something to a queue do queue queuenumber numbertoqueue to add something to a stack do stack stackNumber number to stack
Smallest distance to a palindrome containing a substring
code-golf
Inspired by this CS.SE question.
Task
Given two non-empty input strings A and B, output the smallest distance from A to a palindrome that contains B as a substring. Distance is defined by the number of character replacements.
...
If in my answer I have a sentence saying: Thanks to @user for ... will that user be pinged? Or should I start the sentence with @user or leave a comment?
A study done in Malaysia observed that patients treated with Tongkat Ali saw an expansion in their testosterone levels when they took the supplement. This expansion in testosterone likewise brought about the patients having enhanced temperaments and an increment in quality. What's more, obviously...
This is in the spirit of the What is a Word/Phrase™ series started by JLee with a special brand of Phrase™ and Word™ puzzles.
If a word conforms to a special rule, I call it an Explosive Word™.
Use the following examples below to find the rule.
+-------------------------+
| GOOD | ...
@TimmyD Thanks for your feedback on my latest sandbox post, but I don't think I will post it because as your noted, people will find really large sets by picking sets like [1,1,3,3,7,7] and generate all possible products of primes from this
@orlp I just went with the definition the OP had chosen. There's no universally accepted definition of natural number; heck, there's not even a universally accepted definition of positive integer. In set theory, you want the natural numbers to contain all finite ordinals, so you usually include 0, which is defined as the empty set.
Challenge
Given a string such as Hello World!, break it down into its character values: 72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100, 33.
Then calculate the difference between each consecutive pair of characters: 29, 7, 0, 3, -79, 55, 24, 3, -6, -8, -67.
Finally, sum them and print the ...
Brain-Flak, 48 bytes
{([{}]({})<>)<>}<>{}([]<>){({}[()])<>({}{})<>}<>
Try it online!
This ones a little bit harder than my other answer, haha. Lets walk through it.
{ While the top of the stack is nonzero:
( Push:
[{}] The top of the stack * negative one. Pop...
Credit
My thanks to Rand Al'Thor's letter-based question for the inspiration for this code-golf challenge.
Background
The nature of this challenge is based off the algorithm mentioned by Rand in his "A Triangle Formed of Three Letters":
Start with a sequence of 10 letters each of which ...
URL shorteners / shortened URLs
Every once in a while, we get a challenge that requires fetching some data from the internet. While some of them manage to ban URL shorteners in time, other don't. I propose to forbid them by default because of the following reasons.
URL shorteners that were cre...
Ever fancied creating cool twitter hashtags such as #brexit or #brangelina? this golf is for you.
Write a program that accepts two strings A & B as input and merges them according to the following algorithm:
let n be the number of vowels groups in A (e.g. britain has 2 vowels groups : i in p...
Handwriting Recognition
code-golf image-processing
The MNIST dataset is a series of handwritten digits used as a standard testbed for machine learning, pattern recognition techniques. Each image is of a single digit, 0-9; as a 28x28 pixel grayscale matrix with values from 0-255.
The challeng...
Challenge
Given the symbol for a special set, output every number contained within that set.
Input
The input will be a single ASCII character: either P, N, Z or Q.
Output
Your output must be an infinitely increasing list of numbers separated by newlines. Depending on the input, your output m...
The Challenge
Given a string containing only lowercase or uppercase letters and no spaces.
=>You have to sum up the ASCII values for each character instance in the input string.
=>The sum up value will be converted to binary format.
=>And, the result will be the number of ones in the binary v...
Straw, 25 bytes
(Hello b, I'm Straw!)b</>
Try it online!
Simple regex substitution.
Smallest distance to a palindrome containing a substring
code-golf
Inspired by this CS.SE question.
Task
Given two non-empty input strings A and B, output the smallest distance from A to a palindrome that contains B as a substring. Distance is defined by the number of character replacements.
...
