lib/spreadsheet/worksheet.rb
def each(skip=dimensions[0], &block)
      rows = skip.upto(dimensions[1] - 1).map { |index| row(index) }.to_enum

      if block_given?
        rows.each(&block)
      else
        rows
      end
    end
def each(skip=dimensions[0], &block)
      rows = skip.upto(dimensions[1] - 1).map { |index| row(index) }.to_enum

      if block_given?
        rows.each(&block)
      else
        rows
      end
    end
If no argument is given, #each iterates over all used Rows (from the first
 used Row until but omitting the first unused Row, see also #dimensions).

 If the argument skip is given, #each iterates from that row until but
 omitting the first unused Row, effectively skipping the first _skip_ Rows
 from the top of the Worksheet.