select method
Implementation
FieldElement select(FieldElement other, int selector) {
final int b = -selector;
final List<int> result = List.filled(10, 0);
for (int i = 0; i < 10; i++) {
result[i] = _t[i];
int x = _t[i] ^ other._t[i];
x &= b;
result[i] ^= x;
}
return FieldElement(result);
}