class RubyXL::Cell

def value(args = {})
  return raw_value if args[:raw]
  case datatype
  when RubyXL::Cell::SHARED_STRING then
    workbook.shared_strings_container[raw_value.to_i]
  else 
    if is_date? then workbook.num_to_date(raw_value.to_i)
    elsif raw_value.is_a?(String) && (raw_value =~ /^-?\d+(\.\d+(?:e[+-]\d+)?)?$/i) # Numeric

      if $1 then raw_value.to_f
      else raw_value.to_i
      end
    else raw_value
    end
  end
end