Comparable

A mix-in allowing for relational operations. Classes including this module must define the basic relational operators <, =, and >. All other relational operators can be derived through use of those definitions.

self == other

Returns TRUE when self and other are equal.

When <=> returns nil, returns nil.

self > other

Returns TRUE when self is greater than other.

When <=> returns nil, throws an ArgumentError exception.

self >= other

Returns TRUE when self is greater than or equal to other.

When <=> returns nil, throws an ArgumentError exception.

self < other

Returns TRUE when self is less than other.

When <=> returns nil, throws an ArgumentError exception.

self <= other

Returns TRUE when self is less than or equal to other.

When <=> returns nil, throws an ArgumentError exception.

between?(min, max)

Returns TRUE when self falls within a range from min to max, inclusive.

When self <=> min or self <=> max returns nil, throws an ArgumentError exception.