Posts by celtschk‭

Replace n+1 with -~n and n-1 with ~-n For integers, n+1 and ~-n have the same value, as have n-1 and -~n. While the expressions themselves have the same lengths, the replacements often allow to s...

posted 2y ago by celtschk‭  ·  edited 2y ago by celtschk‭

Python 3, 35 bytes lambda m:list(zip(*m[::-1]))[::-1] Try it online! The format is a list of tuples. The content of the tuples could be any type; in my tests I used single-digit strings bec...

posted 1y ago by celtschk‭  ·  edited 1y ago by celtschk‭

posted 2y ago by celtschk‭

Python 3, 75 bytes lambda a:[[i,k]for i in r(l(a))for k in r(l(a[0]))if a[i][k]] r=range;l=len Try it online!

posted 2y ago by celtschk‭

Unlambda, 40 bytes `````````````.H.e.l.l.o.,. .W.o.r.l.d.!i Try it online!

posted 2y ago by celtschk‭

C++ (gcc), 61 bytes float f(int n,float*p,float x){return n?*p+x*f(n-1,p+1,x):0;} Try it online!

posted 2y ago by celtschk‭

Replace if/else expressions by array subscripts Consider the statement a=b if x<y else c You can get rid of the expensive keywords by using the implicit conversion of boolean values to inte...

posted 2y ago by celtschk‭

Python 3, 91 90 bytes Saved one byte thanks to Mark Giraffe in the comments lambda l:"".join(["".join(x)for x in zip_longest(*l,fillvalue='')]) from itertools import* Try it online!

posted 2y ago by celtschk‭  ·  edited 2y ago by celtschk‭

C (gcc), 40 bytes i;f(n){for(i=1;n>0;n-=i,i+=2);return!n;} Try it online!

posted 2y ago by celtschk‭

Python 3, 64 62 bytes for i in range(1,101):print("Fizz"*(i%3<1)+"Buzz"*(i%5<1)or i) Try it online! Saved two bytes thanks to Moshi‭ in the comments.

posted 2y ago by celtschk‭  ·  edited 2y ago by celtschk‭

Replace print loops by list unpacking If you want to print elements of a list one per line, the straightforward way to do it is a loop: for i in l:print(i) But this can be shortened using list...

posted 2y ago by celtschk‭

C (gcc), 87 bytes P1: i;main(){scanf("%d",&i);printf("i;main(){scanf(\"%%d\",&i);printf(\"%%d\",%d+i);}",i);} Try it online! Generated P2 for input 10: i;main(){scanf("%d",&i...

posted 2y ago by celtschk‭

If you have a loop or if, you can save two or more characters (depending on the current indentation level and the number of statements in the body) by putting it right after the colon: For example...

posted 2y ago by celtschk‭  ·  edited 2y ago by General Sebast1an‭

C (gcc), 50 bytes f(int(*o)(i,j),int n){return n-1?o(f(o,n-1),n):1;} Try it online!

posted 2y ago by celtschk‭

C (gcc), 33 31 bytes f(x,y){return x+y+(x==2&y==2);} Try it online! Saved two bytes thanks to Shaggy

posted 2y ago by celtschk‭  ·  edited 2y ago by celtschk‭

SOS, 155 Bytes !+!-!!+!-!!!!+!!-!!+!-!+!-!+!!-!+!!-!!!+!!-!+!!-!!!+!!-!+!!!!-!!+!-!+!!-!!!!+!-!!!!!!+!-!+!-!+!!!-!+!!-!+!!!!-!+!!!-!!+!-!!+!!-!+!!-!!!+!!-!!+!-!!+!-!!!!+! Explanation: Each ! o...

posted 2y ago by celtschk‭  ·  edited 2y ago by celtschk‭

SOS, 76 bytes +>+>?<+>?<+>?<+>?<+>?<+>?<+>?<+>?<<)<<-(>{>!<{>!<{>!<{>!<{>!<{>!<{>!<{>!&l...

posted 2y ago by celtschk‭

Python 3, 74 bytes def f(a): d={x:0 for x in a};r=[] for x in a:d[x]+=1;r+=[d[x]] return r Try it online!

posted 2y ago by celtschk‭

C (gcc), 117 bytes b,r;f(char*s){char*p=s;for(;*p;p++)*p-=47+7*(*p>57),b=b<*p?*p:b;if(b<2)return p-s;for(;*s;s++)r*=b,r+=*s-1;return r;} Try it online!

posted 1y ago by celtschk‭

Bash, 31 bytes tr a-zA-Z0-9 n-za-mN-ZA-M5-90-4 Try it online!

posted 1y ago by celtschk‭