From: Morton Goldberg <m_goldberg@...>
Date: 2006-10-09T23:15:32+09:00
Subject: Re: Beginning of day given a Time value

On Oct 9, 2006, at 9:45 AM, Michael Guterl wrote:

> Anyone have a nice idiomatic way given an instance of Time, to  
> return the
> beginning of that day?  Below is my approach but it just feels very  
> wrong...
>
> require "test/unit"
> require "time"
>
> class Time
>  def begin_of_day
>    Time.parse "#{self.month}/#{self.day}/#{self.year}"
>  end
> end
>
> class TestBeginOfDay < Test::Unit::TestCase
>  def test_begin_of_day
>    start_of_day = Time.parse "10/1/2006 00:00"
>    time = Time.parse "10/1/2006 9:45"
>    assert_equal(start_of_day, time.begin_of_day)
>  end
> end

How about this?

class Time
    def begin_of_day
       self - 3600 * hour - 60 * min - sec
    end
end

It passes your unit test.

Regards, Morton