From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2008-04-16T19:24:56+09:00
Subject: Re: Calculating elapsed time

On Wed, Apr 16, 2008 at 11:56 AM, Clement Ow
<clement.ow@asia.bnpparibas.com> wrote:
> I have a program where i put the time at the beginning:
>  puts $t1=Time.now
>
>  and then after running some commands, i put the time again:
>  puts $t2=Time.now
>
>  and then have a method to calculate the time elapsed:
>  def calTime
>  starttime_sec= $t1.strftime("%S").to_i
>  starttime_min= $t1.strftime("%M").to_i
>  endtime_sec= $t2.strftime("%S").to_i
>  endtime_min= $t2.strftime("%M").to_i
>  diff_sec= endtime_sec - starttime_sec
>  diff_sec1= diff_sec.to_s
>  diff_min= endtime_min - starttime_min
>  diff_min1= diff_min.to_s
>  puts "\nElapsed time:\n "+ "Min-> " +diff_min1 + " Sec-> "+ diff_sec1
>
>  However, the calculation has limitations because if the start time is
>  say, 4:50 and the end time is 5:10, it will return an errorneous value
>  like -49 for the Min value, which is obviously not what we want..
>
>  Any alternative method or any corrections to the method are welcome. ;)

Alternative:

irb(main):001:0> start = Time.now
=> Wed Apr 16 12:06:23 +0200 2008
irb(main):003:0> finish = Time.now
=> Wed Apr 16 12:07:24 +0200 2008
irb(main):005:0> elapsed = (finish - start).to_i
=> 65
irb(main):012:0> mins = elapsed / 60
=> 1
irb(main):013:0> secs = elapsed % 60
=> 5

Jesus.