\x89\x50\x4E\x47\x0D\x0A\x1A\x0A PNG  \x89\x50\x4E\x47\x0D\x0A\x1A\x0A # frozen_string_literal: false require 'optparse' require 'date' OptionParser.accept(DateTime) do |s,| begin DateTime.parse(s) if s rescue ArgumentError raise OptionParser::InvalidArgument, s end end OptionParser.accept(Date) do |s,| begin Date.parse(s) if s rescue ArgumentError raise OptionParser::InvalidArgument, s end end