class Range

Public Instance Methods

overlaps?(other) click to toggle source

Compare two ranges and see if they overlap each other

(1..5).overlaps?(4..6) # => true
(1..5).overlaps?(7..9) # => false

# File lib/active_support/core_ext/range/overlaps.rb, line 7
def overlaps?(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 Instance Methods

_empty_range?(b, e, excl) click to toggle source

# File lib/active_support/core_ext/range/overlaps.rb, line 30
def _empty_range?(b, e, excl)
  return false if b.nil? || e.nil?

  comp = b <=> e
  comp.nil? || comp > 0 || (comp == 0 && excl)
end