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Versions: 20
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Contents
# frozen_string_literal: true
class Range
# Compare two ranges and see if they overlap each other
# (1..5).overlap?(4..6) # => true
# (1..5).overlap?(7..9) # => false
unless Range.method_defined?(:overlap?) # Ruby 3.3+
def overlap?(other)
raise TypeError unless other.is_a? Range
self_begin = self.begin
other_end = other.end
other_excl = other.exclude_end?
return false if _empty_range?(self_begin, other_end, other_excl)
other_begin = other.begin
self_end = self.end
self_excl = self.exclude_end?
return false if _empty_range?(other_begin, self_end, self_excl)
return true if self_begin == other_begin
return false if _empty_range?(self_begin, self_end, self_excl)
return false if _empty_range?(other_begin, other_end, other_excl)
true
end
private
def _empty_range?(b, e, excl)
return false if b.nil? || e.nil?
comp = b <=> e
comp.nil? || comp > 0 || (comp == 0 && excl)
end
end
alias :overlaps? :overlap?
end
Version data entries
20 entries across 20 versions & 2 rubygems