From: Daniel Berger <djberg96@...>
Date: 2007-01-03T04:55:07+09:00
Subject: Re: Detecting holidays


Jeremy McAnally wrote:
> Well, the way I'm working it out is like AR's dynamic finders.  It
> will have a few groups of dates hardcoded (like national holidays and
> such), but then you can give it new groups in the form hashes of
> arrays of dates with named "work_holidays" or "surprise_offdays" and
> then call the method like is_a_work_holiday? or is_a_surprise_offday?.
>   I'm still working on it...I'll post when I've got it done.

Actually, once I took a stab at it, I think it's fairly easy for the
national holidays IF I'm using Date#cweek correctly and reliably here:

require 'date'

class Date
   def thanksgiving?
      month == 11 && wday == 4 && cweek == 3
   end

   def christmas?
      month == 12 && day == 25
   end

   def new_years?
      month == 1 && day == 1
   end

   alias new_year new_years
   alias new_years_day new_years

   def memorial_day?
      if month == 5 && wday == 1 && cweek == 5
   end

   def independence_day?
      month == 7 && day == 4
   end

   alias fourth_of_july? independence_day?

   def national_holiday?
      new_years? && memorial_day? && independence_day? && thanksgiving?
&&
      christmas?
   end
end

How's that?

Regards,

Dan