module other_module â -1, 0, +1, or nil
Instance Public methods
ComparisonâReturns -1, 0, +1 or nil depending on whether
module includes other_module, they are the same,
or if module is included by other_module. This is
the basis for the tests in Comparable.
Returns nil if module has no relationship with
other_module, if other_module is not a module, or
if the two values are incomparable.