Method: RangeOperations::Array.subtract

Defined in:
lib/range_operations/array.rb

.subtract(range, subranges) ⇒ Object

Returns an array of ranges resulting from removing from range any parts overlapped by any of subranges.



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# File 'lib/range_operations/array.rb', line 31

def self.subtract(range, subranges)
  simple = simplify(subranges)

  [].tap do |acc|
    start = range.begin

    simple.each do |sr|
      next if sr.end < start

      if sr.begin > start
        finish = [sr.begin, range.end].min
        acc << (start .. finish)
      end

      start = sr.end
      break if start > range.end
    end

    if start < range.end
      acc << (start .. range.end)
    end
  end
end