collections.diff
Compare two lists of records by key: which were added, which removed, and which changed and in what fields.
diff_by_key in RustTagged compare
4 capabilities
crypto.constant-time-equal
Compare two byte strings in time that does not depend on where they differ, for checking MACs and hashes.
constant_time_equal in Rust
math.rational
Exact fraction arithmetic, always reduced, for rates and ratios that must not drift.
A group of 8:
calculate_rational, rational, add_rational, subtract_rational, multiply_rational, divide_rational, compare_rational, rational_to_integer
money.compare
Compare two amounts of one currency, refusing to compare across currencies; min, max and clamp too.
A group of 4:
compare_money, min_money, max_money, clamp_money