循环输入用于 Google 日历的 .Ics 格式文件 

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require 'date';

start, days, summary = DateTime.new(2010,1,1), 76, '到';

puts %{
    BEGIN:VCALENDAR
    PRODID:-//Google Inc//Google Calendar 70.9054//EN
    VERSION:2.0
    CALSCALE:GREGORIAN
    METHOD:PUBLISH
    X-WR-TIMEZONE:UTC
    X-WR-CALDESC:
};

days.times {
    puts %{
        BEGIN:VEVENT
        DTSTART;VALUE=DATE:#{start.strftime('%Y%m%d')}
        DTEND;VALUE=DATE:#{start = start.next; start.strftime('%Y%m%d')}
        SUMMARY:#{summary}
        END:VEVENT
    }
};

puts %{END:VCALENDAR}