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Contents
# frozen_string_literal: true
module MetalArchives
##
# Range which can start and/or end with +nil+
#
class Range
include Comparable
##
# Begin- and endpoint of range
#
attr_accessor :begin, :end
##
# Create a new range
#
# [+_begin+]
# Start of range
#
# Default: +nil+
#
# [+_end+]
# End of range
#
# Default: +nil+
#
def initialize(_begin = nil, _end = nil)
@begin = _begin
@end = _end
end
##
# Whether start of range is present
#
def begin?
!!@begin
end
##
# Whether end of range is present
#
def end?
!!@end
end
##
# Comparison operator
#
def <=>(other)
comp_begin = self.begin <=> other.begin
comp_end = self.end <=> other.end
# Return nil if begin or end is uncomparable
return nil if comp_begin.nil? || comp_end.nil?
# Compare end if begin is equal
return comp_end if comp_begin.zero?
# Compare begin if end is equal
return comp_begin if comp_begin.zero?
# Compare actual range
(self.end - self.begin) <=> (other.end - other.begin)
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems