Function icmpBy

Compare two iterables of arbitrary values to determine their lexicographical ordering.

Remarks

Iterables are compared lexicographically, which means:

• Two iterables are compared element by element.
• Two empty iterables are lexicographically equal.
• If two iterables have equivalent elements and are the same size, the iterables are lexicographically equal.
• An empty iterable is lexicographically less than any non-empty iterable.
• If one iterable is a prefix of another, the shorter iterable is lexicographically less than the other.
• The first mismatching element defines which iterable is lexicographically less or greater than the other.