Random generator, my ...

Meanwhile, back in 2013: https://forums.cardhunter.com/threads/enemy-rolls-seem-anything-but-random.727/

 

Interesting analysis, but what really caught my eye as a programmer was this trick I've somehow never seen before:

Code:

if (j != i) {        // Classic XOR-based swap
     deck[i] ^= deck[j];   // C1 = C1_orig xor C2_orig
     deck[j] ^= deck[i];   // C2 = C2_orig xor C1_orig xor C2_orig = C1_orig
     deck[i] ^= deck[j];   // C1 = C1_orig xor C2_orig xor C1_orig = C2_orig
}

Also, in case anyone needs a translation...

Spoiler: Sentient_Toaster said:

 

I love that swapping technique, but every time I use it, I have to go through it to remember what's going on and convince myself it's not witchcraft =D