196

submitted 11 months ago* (last edited 11 months ago) by andioop@programming.dev to c/programming_horror@programming.dev

55 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[-] mac@programming.dev 23 points 11 months ago* (last edited 11 months ago)

who needs modulo when you can get less characters out of

while (number > 1) {
  number -= 2;
}
return number;

very efficient

edit: or theres the trusty iseven api

[-] nullPointer@programming.dev 9 points 11 months ago

here is somewhat less:

return (number % 2) == 0;

[-] pivot_root@lemmy.world 10 points 11 months ago

return !(number & 1);

[-] venoft@lemmy.world 8 points 11 months ago* (last edited 11 months ago)

This is the way. Modulo takes too long to compute, bitwise compare should be a lot faster.

return !(number &amp; 0x1);

[-] recursive_recursion@programming.dev 5 points 11 months ago* (last edited 11 months ago)

oh shit yo

this comment chain is pretty awesome, I learned a lot from this thanks!

[-] huf@hexbear.net 4 points 11 months ago

just check the last bit jesus christ, what is it with these expensive modulo operations?!

return !(n&1);

[-] perviouslyiner@lemm.ee 2 points 11 months ago

are the negative numbers all even?

[-] I_am_10_squirrels@beehaw.org 2 points 11 months ago

Yes

this post was submitted on 07 Dec 2023

196 points (91.2% liked)

Programming Horror

1634 readers

1 users here now

Welcome to Programming Horror!

This is a place to share strange or terrible code you come across.

For more general memes about programming there's also Programmer Humor.

Looking for mods. If youre interested in moderating the community feel free to dm @Ategon@programming.dev

Rules

Keep content in english
No advertisements (this includes both code in advertisements and advertisement in posts)
No generated code (a person has to have made it)

founded 1 year ago

MODERATORS