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x86-32 assembly, 14 bytes Straightforward solution with custom calling convention: inputs in eax and ebx, output in eax. cmp opcode could be smaller if limited to 8-bit integers? 00000000 <add...
Python, 55 Bytes lambda x:chr(int(bin(ord(x))[2:].rjust(8,"0")[::-1],2)) Takes input as the actual byte, and outputs the actual byte. Try it online!
C (gcc), 47 bytes r,c;f(i){return c++<8&&(r=r<<1|i&1,f(i>>1)),r;} Try it online! I didn't manage to come up with anything better than the most obvious recursive im...
C (gcc), 42 bytes c;f(i){c++<8&&(printf("%d",i&1),f(i>>1));} Try it online! Binary output version.
Suggest a word from a word list, given a string. Motivation Imagine typing a word one letter at a time, and seeing a suggested word after each letter is typed. At first the suggested word is simp...
Recently I asked for tips on improving some code-golf of mine. The code was supposed to output every third value of the Fibonacci sequence starting with 2: 2,8,34,144,610,2584,10946,46368,196418,...
C (gcc), 41 bytes f(x,y){int r=x*y;return r&&r==x+y?5:x+y;} Attempt This Online!
Functions may return bools via the presence/absence of an error Crashing to mean false and not crashing to return true. Another branch of the exit code answer.
Programs/functions may use the presence/absence of output as a bool
Languages made specifically for a challenge after it was published This is the general problem with allowing languages newer than the challenge. This is already considered a standard loophole, and...
Background While we do have a "Hello, World!" challenge, we still don't have one regarding input. So let's do one! Challenge Create a program that takes an input (not as a function argument) the...
C (clang), 210 198 183 bytes i,j,k,l;s(v,w,x,y,z){printf("%s",v);for(;w<x;w++){printf("%s",y);}puts(z);}main(){scanf("%i",&i);l=i-3;s("╔",j,l,"╦","╗");for(j=0;j<i-2;j++){s("╠",k,l,"╬",...
Lua's not really used much in golfing, so it'd be pretty cool to learn some golfing tricks when making answers using it. What golfing tips are there for Lua?
Python 3, 29 bytes import numpy numpy.linalg.det Yeah, this is really boring, but I'm curious if this can be beat in Python. Try it online!
Sclipting, (UTF-16) 18 bytes 낆녬닆묬긅덯댦롤긐 Since it hasn't been added yet.
Java (JDK), 134 123 118 bytes interface M{static void main(String[]a){System.out.print("Hello, "+new java.util.Scanner(System.in).nextLine()+"!");}} Try it online! Golfed 5 bytes thanks to @...
C (clang), 116 102 bytes j,k;f(i){for(j=i;j--;printf("#"));for(j=i-1;j--;printf("#"))for(k=i-2,printf("\n#");k--;printf(" "));} Try it online! Sometimes, it's better to use functions when yo...
Remove print's parentheses when it's a single string print strangely works without parentheses, however, it only applies to single strings. In other words, it can't do the same for other variables...
jq --null-input --raw-output, 15 bytes "Hello, World!" Try it online! They kept saying that jq is the language of September 2021. Still surprised no one even made a Hello, World! on it.
