Programmer Humor

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Post funny things about programming here! (Or just rant about your favourite programming language.)

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Infallible Code (lemmy.ml)

submitted 1 day ago by sirico@feddit.uk to c/programmerhumor@lemmy.ml

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[–] tetris11@lemmy.ml 18 points 1 day ago* (last edited 1 day ago) (12 children)

I prefer good ole regex test of a binary num

function isEven(number){
   binary=$(echo "obase=2; $number" | bc)
   if [ "${binary:-1}" = "1" ]; then
         return 255
   fi
   return 0
}

[–] balsoft@lemmy.ml 8 points 1 day ago* (last edited 1 day ago) (7 children)

Amateur! I can read and understand that almost right away. Now I present a better solution:

even() ((($1+1)&1))

~~(I mean, it's funny cause it's unreadable, but I suspect this is also one of the most efficient bash implementations possible)~~

(Actually the obvious one is a slight bit faster. But this impl for odd is the fastest one as far as I can tell odd() (($1&1)))

[–] Aedis@lemmy.world 2 points 1 day ago (1 children)

I'm waiting for a code golf style solution now.

[–] balsoft@lemmy.ml 2 points 1 day ago

I don't think there's much to codegolf. The "obvious" solution (even() (($1%2))) is both shorter and faster. Don't think it can be optimized much more.

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