From: Glenn Jackman <glennj@...>
Date: 2010-04-29T00:15:06+09:00
Subject: Re: Problem With Formatting

At 2010-04-28 01:35AM, "Sourav Haldar" wrote:
>  The Below Code is not appropiate if some one explain
>  
>  Day = 60 * 60 * 24
>  
>  Fromat = "http://www.google.com" # or any Image Files
>  
>  t = Time.local(2005, 2, 5)
>  
>  MWF = [1,3,5]
>  
>  until t == Time.local(2007, 7, 9)
>    if MWF.include? t.wday
>      `wget #{t.strftime(Fromat)}`
>      sleep 3
>    end
>  
>    t += Day
>  end

You'll get into trouble with daylight savings time assuming that 1 day =
86400 seconds:

    t = Time.local(2009,11,1)  # => 2009-11-01 00:00:00 -0500
    day = 60*60*24             # => 86400
    t + day                    # => 2009-11-01 23:00:00 -0500

To increment by 1 day, use the ActiveSupport gem:

    require 'active_support'
    t + 1.day                  # => 2009-11-02 00:00:00 -0500

-- 
Glenn Jackman
    Write a wise saying and your name will live forever. -- Anonymous