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I'd like to make a challenge that involves the use of a microcontroller, specifically, a challenge to read any 4-bit Gray Code from 4 IO pins, and convert it to binary. Simple introductory type cha...
Husk, 9 bytes ḟo=⁰Σπ2İp Try it online! Explanation ḟo=⁰Σπ2İp İp take the infinite list of primes π2 cartesian power 2 (all possible pairs) ḟo first pair which satisfie...
JavaScript (Node.js), 87 bytes f=(a,b=2,c=a-b,d=(a,b=2)=>b<a?a%b&&d(a,b+1):1,e=a=>d(++a)?a:e(a))=>d(c)?[b,c]:f(a,e(b)) Try it online!
Goldbach's Conjecture states that every even whole number greater than 2 is the sum of 2 prime numbers. Your task is to return those 2 prime numbers, given an even whole number as input. There are ...
Stax, 12 bytes ç ∩<▬%▌ê▓jFo Run and debug it Same method as the Canvas answer.
Canvas, 10 7 6 bytes Ｚ［］／┼┼ Try it here! Creates the top portion, centers it, and mirrors it. -3 bytes from dzaima's hint. -1, found the 6 byter! Explanation Z[]/++ Z push the al...
V (vim), 21 bytes ¬AZ¬YA|òlÄ26|xx>>YGpH Try it online! Explanation: ¬AZ " Insert every character from A to Z ¬YA " Insert every character from Y...
Japt -R, 14 13 bytes ;Bãê kb'A û ê Test it Takes all substrings of the alphabet, palindromizes them, and then takes only the ones starting with A and centers and mirrors that too. -1 byte tha...
JavaScript (Node.js), 78 bytes (m=(a,b=26,c=a(--b))=>b?[c,...m(a,b),c]:[c])=>m(a=>m(b=>(c=25-a-b)<0?32:c+65)) Try it online!
Challenge Output the following text: A ABA ABCBA ABCDCBA ABCDEDCBA ...
C (gcc), 153 bytes a,b;f(char*s){for(char*c,*o="idso";*s;s++)for(c=o;*c;c++)*s==*c&&(b=c-o,a+=!b,a-=b==1,b==2?a*=a:0,b==3&&printf("%d%c",a,s[1]?44:10),a==-1|a==256?a=0:0);} Tr...
JavaScript (Node.js), 541 540 bytes for(_='=>)==!(+==0h,.map(M,R(=1,,e,b &&Nl=[-1,))s(n,=(a a=u,v(i=g(z,u,f=(a,w,cs=Math.max,r?[...r(--a ) (a)]:[],R>&b>&a<w&b<...
Note: This challenge was underspecified and bad, and as such I would not encourage answering it in the future. Challenge You will be given a single 2D boolean array $M$. You may take its dimensi...
APL (Dyalog Classic), 47 bytes i←+∘1⋄d←-∘1⋄s←×⍨⋄o←⎕∘←⋄{}{0⌈a×256≠a←⍎⍕⍺,⍵}/⌽0,⍞ Try it online!
JavaScript (Node.js), 80 bytes f=a=>a.map(a=>(a&=6,a-2?a-6?c+=1-a/2:d+=c+' ':c*=c,c*=c!=-1&c!=256),c=0,d='')&&d Try it online!
A rewrite of this SE question with a simpler input format and guidelines. Challenge Deadfish uses a single accumulator, on which all commands are to be performed. It has the following commands: ...
Pyth, 10 bytes s*R^H~hZhA Try it online! Alternate 10 byte solution: s.e*b^eQkh Try it online!
Jelly, 2 bytes ŒṪ Try it online! 1-indexed, but the footer converts to 0-indexed. Less built-in: Jelly, 3 bytes œẹ1 Try it online! œẹ All multidimensional indices of 1 one. ...
