ojhPositional64c function hashes
64-bit Positional hash
Implementation
int ojhPositional64c(Iterable<Card> cards) {
int max = 10;
int h = 0;
for (Card c in cards) {
max -= 1;
assert(max >= 0);
h <<= 6;
h += (0x3F & c.index);
}
return h;
}