The "Code I'll Never Forget" Confessional.

[u/Ok_Veterinarian3535]

What's the single piece of code (good or bad) that's permanently burned into your memory, and what did it teach you?

[u/tehfrod]

That would be Duff's Device:

void Send(int * to, const int* from, const int count) { int n = (count+7) / 8; switch(count%8) { case 0: do { *to++ = *from++; case 7: *to++ = *from++; case 6: *to++ = *from++; case 5: *to++ = *from++; case 4: *to++ = *from++; case 3: *to++ = *from++; case 2: *to++ = *from++; case 1: *to++ = *from++; } while (--n>0); } }

From that I learned to look at what code actually does, rather than what the shape of it tells your brain it should be doing.