I had to think about what that loop does for an embarrassingly long time. I’ve never seen XOR used as an in-place alternation operator like that in a for loop.

I had to think about what that loop does for an embarrassingly long time. I’ve never seen XOR used as an in-place alternation operator like that in a for loop. I’ve only ever seen it used as a swap function not an inline expression. I’ve also never seen a for loop that uses a mutable string updated char-by-char like that. It’s just… special.