# File lib/facets/core/range/combine.rb, line 7
  def self.combine(*intervals)
    intype = intervals.first.class
    result = []

    intervals = intervals.collect do |i|
      [i.first, i.last]
    end

    intervals.sort.inject([]) do |result, (from, to)|
      if result.empty? or from > result.last[1]
        result << [from, to]
      elsif to > result.last[1]
        result.last[1] = to
      end
      result
    end

    if intype <= Range
      result.collect{ |i| ((i.first)..(i.last)) }
    else
      result
    end
  end