From: Paul <tester.paul@...>
Date: 2007-03-20T05:00:14+09:00
Subject: Re: Sorting Dates and Times in an array

On Mar 19, 1:21 pm, Robert Klemme wrote:
> I think this does not meet the OP's requirements (because of descending
> date).
>
> epoch = Date.new(0)
> @date_array.sort_by {|dt,tm| [epoch - Date.parse(dt), Time.parse(tm)]}
>
> Substraction with epoch will make date components negative and thus lead
> to descending ordering.
>

Hello Robert, I tried this but I get the following errors:

irb(main):003:0> epoch = Date.new(0)
ArgumentError: wrong number of arguments (1 for 0)
        from (irb):3:in `initialize'
        from (irb):3

irb(main):005:0> @date_array.sort_by {|dt,tm| [epoch - Date.parse(dt),
Time.parse(tm)]}
NoMethodError: undefined method `parse' for Date:Class
        from (irb):5
        from (irb):5:in `sort_by'
        from (irb):5

Am I missing a 'require' or something to make your lines work?