From: Peter Vandenabeele <peter@...>
Date: 2012-01-18T00:43:51+09:00
Subject: Re: Parsing log with date time entry

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On Tue, Jan 17, 2012 at 4:37 PM, Peter Vandenabeele
<peter@vandenabeele.com>wrote:

> On Tue, Jan 17, 2012 at 4:26 PM, Christopher Graves <gravescl@gmail.com>wrote:
>
>> Robert Klemme wrote in post #1041261:
>> > On Mon, Jan 16, 2012 at 11:56 PM, Christopher Graves
>> > <gravescl@gmail.com> wrote:
>> >>
>> >> What would be the best way to get the current time formatted per the
>> log
>> >> entries and collect a range of times say from current to 15 minutes
>> >> previously.
>> >
>> > I am not sure what you mean by "collect a range".  Parsing can be done
>> > like this:
>> >
>> > require 'time'
>> > t = Time.strptime('01/10/2012 14:46:02:86', '%m/%d/%Y %H:%M:%S:%L')
>> >
>> > Cheers
>> >
>> > robert
>>
>> Thanks Robert,
>>
>> By collect range, how would I say subtract 15 minutes from the current
>> time so that I can collect all matches from 14:31:02 through 14:46:02?
>>
>
> 1.9.3p0 :006 > Time.now.to_s
>  => "2012-01-17 16:36:06 +0100"
> 1.9.3p0 :007 > (Time.now - (15*60)).to_s
>  => "2012-01-17 16:21:09 +0100"
>

Actually, for log files, it may be better to use uniform UTC times. So,
no confusion on summer/winter time or servers in different part of
the world etc.

1.9.3p0 :029 > Time.now.utc.to_s
 => "2012-01-17 15:43:25 UTC"
1.9.3p0 :030 > (Time.now - (15*60)).utc.to_s
 => "2012-01-17 15:28:30 UTC"

HTH,

Peter

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