Zakk‭

Lua, 31 bytes _=''::_::_=_..'*'print(_)goto _ Try it online!

posted 3y ago by Zakk‭  ·  edited 3y ago by Zakk‭

Lua 5.4.4, 99 bytes _=0s:gsub('.',function(c)_=({d=_-1,i=_+1;s=_*_})[c]or print(_)or _ _=({[256]=0,[-1]=0})[_]or _ end) Try it online! Thanks to @orthoplex for more shortening.

posted 3y ago by Zakk‭  ·  edited 3y ago by Zakk‭

Lua 5.4, 3 unique characters #'#'/#'##' Try it online! [...] scoring is done in terms of number of unique characters used in the submission. Hashtag # Single quote ' Slash /

posted 3y ago by Zakk‭

Lua 5.4, 67 60 bytes function(x)return x==1 and 0 or 1+f(({x/2,3*x+1})[x%2+1])end Attempt This Online! Credits to @Moshi for more shortening.

posted 3y ago by Zakk‭  ·  edited 3y ago by Zakk‭

Lua 5.4.4, 147 bytes local function f()goto l::l::return end for _ in f do end if true and false then elseif""then else end repeat until""or not nil while""do break end Try it online! Check th...

posted 3y ago by Zakk‭  ·  edited 3y ago by Zakk‭

C (gcc), 98 bytes _=0;f(char*s){for(;*s;++s)_==256||_<0?_=0:1,*s=='i'?_++:*s=='d'?_--:*s=='s'?_*=_:printf("%d ",_);} Try it online!

posted 3y ago by Zakk‭  ·  edited 3y ago by Zakk‭

C (gcc), 59 bytes i;f(m,n){while(i<m*n){putchar(i%n?32:13);putchar(48+i++);}} Attempt This Online! m is the number of rows. n is the number of columns.

posted 3y ago by Zakk‭  ·  edited 3y ago by Zakk‭

C (gcc), 43 38 bytes f(i){return i>1?f(i%2?3*i+1:i/2)+1:0;} Attempt This Online! Credits to @Moshi for shortening the code.

posted 3y ago by Zakk‭  ·  edited 3y ago by Zakk‭

C (gcc), 41 bytes f(x,y){int r=x*y;return r&&r==x+y?5:x+y;} Attempt This Online!

posted 3y ago by Zakk‭  ·  edited 2y ago by Zakk‭

JavaScript (V8), 78 bytes f=s=>s.map(c=>(_==256||_<0?_=0:0)||c=='i'?_++:c=='d'?_--:c=='s'?_*=_:v+=_+' ') Try it online!

posted 3y ago by Zakk‭  ·  edited 3y ago by Zakk‭

Lua 5.4.4, 51 bytes function f(n)return n<2 and n or f(n-1)*2+f(n-2)end Try it online!

posted 3y ago by Zakk‭

C (gcc), 35 bytes f(n){return n<2?n:f(n-1)*2+f(n-2);} Try it online!

posted 3y ago by Zakk‭  ·  edited 3y ago by Zakk‭

JavaScript (V8), 13 bytes x=>x**.5%1==0 Try it online!

posted 3y ago by Zakk‭

Lua 5.4, 9 bytes n^.5%1==0 Try it online! The entire compressed code is 33 bytes: function f(n)return n^.5%1==0 end Try it here. It's not clear whether the rules allow the first form (i...

posted 3y ago by Zakk‭

C (gcc), 37 bytes f(n,p){while(++p*p<n);return p*p==n;} Try it online! The solution is based on the simple fact that: $$\forall n \in \mathbb{N}, n \text{ is a perfect square} \Longleftrig...

posted 3y ago by Zakk‭  ·  edited 3y ago by Zakk‭