Method: Cantor::AbsoluteSet#map

Defined in:
lib/cantor/absolute_set.rb

#map ⇒ AbsoluteSet 



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# File 'lib/cantor/absolute_set.rb', line 99

def map
  mask = 0

  @universe.each do |value, n|
    unless @mask[n].zero?
      value = yield(value)

      if m = @universe.fetch(value, false)
        mask |= (1 << m)
      else
        raise "universe does not contain element #{value.inspect}"
      end
    end
  end

  copy(:mask => mask)
end