compare
Compares two lists and returns their relation. For example, strcmp <0, 0, >0
.
compare list1 list2
Corresponding elements of each list
are compared. The result is the value of the first difference encountered or
equality. A list that is a prefix of the other list is considered to be less than
the other list.
By default, items are compared lexicographically. The -numeric
flag, or some unique fraction thereof, causes
the items to be compared as double-precision floating-point numbers.