Linked Questions

52 votes
81 answers

It's Hip to be Square

Challenge So, um, it seems that, while we have plenty of challenges that work with square numbers or numbers of other shapes, we don't have one that simply asks: Given an integer ...
Shaggy's user avatar
  • 41.6k
42 votes
48 answers

Is it true? Ask Jelly!

Background Inspired by Octave's (and, by extension, MATL's) very convenient interpretation of truthy/falsy matrices, Jelly got the Ȧ (Octave-style all) atom. Ȧ takes an array as input and returns 1 ...
Dennis's user avatar
  • 210k
23 votes
70 answers

Check if an array (or equivalent) has the same number of odd and even numbers - Code Golf Edition!

Inspired by this code review question, I am curious to see what happens if we turn that into a code-golf challenge! The description is easy, the input is an array or any similar data structure with ...
bracco23's user avatar
  • 431
32 votes
38 answers

Bubbler and 3 others are typing․․․

Task Implement a kind of "some users are typing" system, which can be found in Discord and some other chat clients. If 1 user (say, Bubbler) is typing, output ...
Bubbler's user avatar
  • 73.8k
39 votes
37 answers

Sums of Consecutive Integers

Before anyone says anything, similar and similar. But this is not a dupe. Some positive integers can be written as the sum of at least two consecutive positive integers. For example, ...
Arcturus's user avatar
  • 7,349
22 votes
37 answers

Reverse factorial function

Given a number n, find x such that x! = n, where both x and n are positive integers. Assume the input n will always be the factorial of a positive integer, so something like n=23 will not be given as ...
Adam Abahot's user avatar
25 votes
31 answers

Enumerate an array, grouping duplicates

The objective of this challenge is to take an array of positive integers, and enumerate its indices, grouping like elements. An enumeration without any duplicates is done by just outputting an array ...
Pavel's user avatar
  • 9,369
60 votes
8 answers

Make the Stretchy Snakes Kiss

A stretchy snake looks something like this: <||=|||:)~ Each separate sequence of vertical bars (|) in a stretchy snake, ...
Calvin's Hobbies's user avatar
29 votes
15 answers

Short Deadfish Numbers

Deadfish is one of the best known non Turing-complete programming languages. It has only one accumulator (which starts at 0) to store data, and only four commands: ...
MegaTom's user avatar
  • 4,266
32 votes
9 answers

Is It Mountainous?

Challenge For this challenge, a mountainous string is one that conforms to the grammar rule M: x(Mx)* where at each production, the all x's are the same character. ...
Beefster's user avatar
  • 9,891
25 votes
8 answers

Fill the rows, columns, and diagonals of an NxN grid with 1 through N

Task Given input N, generate and output an NxN grid where each row, column and the two diagonals contain the numbers 1 to N (or 0 to ...
hargasinski's user avatar
24 votes
7 answers

Tips for golfing in Brachylog

Brachylog is a language that's beginning to rise in prominence in code-golfing recently (and just received a major update with a terser syntax). Like Prolog, it has the advantage that it can often ...
user avatar
17 votes
6 answers

Panfix to parenthesized infix

Quylthulg is a language by Chris Pressey that attempts to solve the problem of infix notation using what it calls panfix: like postfix, panfix does not require the deployment of arcane contrivances ...
Esolanging Fruit's user avatar
19 votes
4 answers

Convert an Expression to Panfix Notation

I was browsing esolangs, and chanced upon this language: One interesting thing about this language, is that it doesn't use prefix, postfix, or infix, it uses all ...
Maltysen's user avatar
  • 25.7k
12 votes
3 answers

RoboZZle interpreter

Your task is to write a RoboZZle interpreter. If you're not familiar with the game, please watch the video at or read my description below. A robot lives on a rectangular grid of squares ...
ngn's user avatar
  • 15.2k

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