From: ara.t.howard@...
Date: 2006-10-09T23:50:29+09:00
Subject: Re: Beginning of day given a Time value

On Mon, 9 Oct 2006, 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
>
> Thanks,
> Michael Guterl

why are you using parse?  without it your method is straightforward enough:

   harp:~ > cat a.rb
   require "test/unit"

   class Time
     def begining_of_day
       Time.mktime(year, month, day).send(gmt? ? :gmt : :localtime)
     end
   end

   class TestBeginOfDay < Test::Unit::TestCase
     def test_begin_of_day
       start_of_day = Time.mktime 2006, 10, 1
       time = Time.mktime 2006, 10, 1, 9, 45
       assert_equal start_of_day, time.begining_of_day
     end
   end


   harp:~ > ruby a.rb
   Loaded suite a
   Started
   .
   Finished in 0.000914 seconds.

   1 tests, 1 assertions, 0 failures, 0 errors


regards.

-a
-- 
in order to be effective truth must penetrate like an arrow - and that is
likely to hurt. -- wei wu wei