From: Peter Dimov (pdimov_at_[hidden])
Date: 2024-12-08 21:19:41
Vinnie Falco wrote:
> On Sun, Dec 8, 2024 at 11:27 AM Ivan Matek via Boost
> <boost_at_[hidden]>
> wrote:
>
> > ...sum is commutative.
> >
>
> Bitwise XOR and modular unsigned multiplication are also commutative.
Bitwise xor has the problem that xoring two equal values yields 0, so
the sequences [1], [1, 1, 1], [1, 2, 2] and so on all hash to the same thing.
Multiply has the problem that a single 0 cancels out everything, and
the problem that multiplying 64 even numbers zeroes out the low
64 bits.