193

God I wish there was an easier way to do this (programming.dev)

submitted 7 months ago* (last edited 7 months ago) by andioop@programming.dev to c/programming_horror@programming.dev

56 comments fedilink hide all child comments

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

[-] recursive_recursion@programming.dev 8 points 7 months ago* (last edited 7 months ago)

modulo

pseudocode:

if number % 2 == 0
  return "number is even" (is_num_even = 1 or true)
else
  return "number is odd" (is_num_even = 0 or false)

plus you'd want an input validation beforehand

[-] mac@programming.dev 22 points 7 months ago* (last edited 7 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 8 points 7 months ago

here is somewhat less:

return (number % 2) == 0;

[-] pivot_root@lemmy.world 9 points 7 months ago

return !(number & 1);

[-] venoft@lemmy.world 8 points 7 months ago* (last edited 7 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 7 months ago* (last edited 7 months ago)

oh shit yo

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

[-] huf@hexbear.net 4 points 6 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 6 months ago

are the negative numbers all even?

[-] I_am_10_squirrels@beehaw.org 2 points 6 months ago

Yes

[-] avonarret1@programming.dev 7 points 7 months ago

🤦

[-] Vex_Detrause@lemmy.ca 4 points 6 months ago

#You are an input. You have value! You matter!
if&nbsp;number&nbsp;%&nbsp;2&nbsp;==&nbsp;0
&nbsp;&nbsp;return&nbsp;"number&nbsp;is&nbsp;even"&nbsp;(is_num_even&nbsp;=&nbsp;1&nbsp;or&nbsp;true)
else
&nbsp;&nbsp;return&nbsp;"number&nbsp;is&nbsp;odd"&nbsp;(is_num_even&nbsp;=&nbsp;0&nbsp;or&nbsp;false)

Am I doing it right? /S.

[-] PoolloverNathan@programming.dev 4 points 6 months ago

Don't put nbsps in code blocks, they show up literally.

[-] misophist@lemmy.world 3 points 7 months ago

Name doesn't check out.

[-] comrade_pibb@hexbear.net 2 points 7 months ago

John carmak posting

[-] RandomVideos@programming.dev 2 points 6 months ago

This code is terrible. If you input 10.66 it returns "number is odd

It should be:

if&nbsp;number&nbsp;%&nbsp;2&nbsp;==&nbsp;0
&nbsp;&nbsp;return&nbsp;"number&nbsp;is&nbsp;even"&nbsp;(is_num_even&nbsp;=&nbsp;1&nbsp;or&nbsp;true)
else
&nbsp;&nbsp;return&nbsp;"number&nbsp;is&nbsp;not even"&nbsp;(is_num_even&nbsp;=&nbsp;0&nbsp;or&nbsp;false)

[-] TankieTanuki@hexbear.net 2 points 7 months ago

are u a wizard?

this post was submitted on 07 Dec 2023

193 points (91.1% 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)

Credits

Icon base made by Lorc under CC BY 3.0 with modifications to add a gradient

founded 1 year ago

MODERATORS

Vacant@programming.dev