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Given an integer $N$ in balanced quinary, output the first $N$ characters of your source code if $N$ is positive, or the last $-N$ characters of your source code if $N$ is negative. Terminology ...
Japt, 233 bytes `ÜÊ Ò Í a×G ¯¯o ÖÚb ¯ØÚ × »Ûá ÝÁ Á²g fig ¤¶n ÓI lªo §Ö ÚAo Ú-n Û u Ûo nÂ) em ÇÓy pe pi¦ Îñ ΰn Ѧk Ѧl sb É Èp Èîp Èl y °ÛG Ù i abiu alÚ app¤ aza bael ba ¼ÚAe ÞÃ...
Given an integer from 1 to 1000, indicate whether it is a centered hexagonal number[1] (also known as a hex number). What is a hex number? The hex numbers can be visualised as follows: On a he...
Given 3 points, output one that is separated from its nearest neighbour by the largest distance. Input 3 distinct points (that is, no 2 points are in the same position). Each point is a pair o...
Haskell, 271 bytes import Data.Char import Data.List n=" IVXLCDM" r x=maximum[if(s`isInfixOf`x)then s else"A"|s<-words$concat$map(\x->(n!!div x 8):[(n!!(x-8*(div x 8)))])$map(\x->ord...
Japt -d, 8 bytes °*U*3¥NÉ Try it 9 bytes NøT±1wU*6 Try it
Bash, 205 bytes for s in C{C{CC,D,M},DC,MC} {CM,DC,D}{D,M} I{C,D,I{II,V,X},L,M,VI,X{C,I,L,V,X}} L{C,D,L,M,XC,XL} MMMM V{C,D,IV,IX,L,M,V,X} X{C{C,D,L,M,X},D,LX,M,X{C,L,XX}} do echo $1|grep -q $s...
A limit of 1 character for Challenges and Sandbox Now that Monica has pointed out that adjusting the minimum is already possible per category, I propose that we leave the minimum at 15 characters ...
Dyalog APL, 10 bytes ⊢∊1+\⍤,6×⍳ Port of lyxal's Vyxal answer. Explanation ⊢∊1+\⍤,6×⍳...
Something I would like to see here are explicit and specific constraints on how submitted solutions are expected to accept the challenge input and output their solutions (if output is the goal). F...
AWK, 28 26 21 bytes $0=$1~2&&$2~2?5:$1+$2 Try it online!
Rust, 258 254 bytes Saved four bytes thanks to trichoplax. fn v(s:&str)->&str{for b in "CCCC CCD CCM CDC CMC CMD CMM DCD DCM DD DM IC ID IIII IIV IIX IL IM IVI I...
AWK, 80 bytes {split("I V X L C D M 1 5 10 50 100 500 1000",d);for(;d[++i]!=$1;);print d[i+7]} Try it online! A quick map function. 'split' breaks the string into array elements. Find the stri...
C (gcc), 30 bytes main(){puts("Hello, World!");} Try it online! This is using GNU C extensions. GNU C allows main() over int main(), ss well as using puts without including stdio.h.
K (oK), 9 bytes {x#0}'!10 Try it online! !10 / pass range your arbitrary number .' / treat those as a list, and evaluate each separately { } / main function...
AWK, 82 bytes {split($1,d,"");i=a=d[1];for(x in d){d[x]>a?a=d[x]:0;d[x]<i?i=d[x]:0}print a+i+$1} Try it online! Just pass your input, e.g.: echo "123" | awk '...'
Emmental, 51 bytes #72.#101.#108::..#111:.#44.#32.#87..#114..#100.#33. Try it online! Basically what goes on is #[num] pushes the ASCII value of num onto the top of the stack, : duplicates t...
Python 3, 43 bytes lambda n:len({*map(str(n).count,str(n))})<2 Try it online!
Python 3, 26 bytes lambda n:(n+(n*n+4)**.5)/2 We can actually just compute this directly, although I could have taken an alternate path considering the fact that, given $R_n$ as the ratio betwe...
Python 3, 131 75 62 bytes f=lambda n:n>0and 2+3*f(n-1)+4*f(n-2)+2*sum(map(f,range(n-2))) I know, a one-liner is boring. This is because I apparently didn't need a separate function/lambda to...
The code-golf-tips tag seems redundant since we already have code-golf and tips. It also has zero usages. Should this tag be deleted to avoid its future usage?
What tips do you have for saving bytes in Rust? Please post one tip per answer for ease of voting and commenting.
Avoid type annotations with a closure instead of a fn Function (24 bytes) A function requires types to be specified for its return value, and for any arguments it takes. fn f(a:u8,b:u8)->u8{a...
Japt -g!, 5 bytes ü üÊÅ Try it ü üÊÅ :Implicit input of string/array ü :Group & sort by value ü :Group & sort by Ê : Length Å :Slice off the fi...
