Hi Monks, Thanks to hipowls for the 1st part of the tasks, and comes the next part where i am trying to figure out how to do it

1. read a log file
2. search the logfile.txt for a specific string, in this case the string "TWO"
3. locate records where refs number are identical and time difference is more than 1 hour ( eg record 1 and record 8 )
4. based on the above 3 criteria, create a report file, as how many occourance the scenario happened. 

2008-Jan-06 00:00:01 UTC (GMT +0000) - Poll: channel = ONE, refs = 595
+166299
2007-Jan-06 00:00:01 UTC (GMT +0000) - Poll: channel = TWO, refs = 595
+159906
2007-Jan-06 00:00:01 UTC (GMT +0000) - Poll: channel = THREE, refs = 6
+59975924
2007-Jan-06 00:00:04 UTC (GMT +0000) - Poll: channel = ONE, refs = 595
+148941
2007-Jan-06 00:00:04 UTC (GMT +0000) - Poll: channel = TWO, refs = 595
+131400
2007-Jan-06 00:00:04 UTC (GMT +0000) - Poll: channel = THREE, refs = 6
+59975924
2007-Jan-06 00:00:04 UTC (GMT +0000) - Poll: channel = ONE, refs = 595
+159906
2007-Jan-06 01:00:05 UTC (GMT +0000) - Poll: channel = ONE, refs = 595
+166299
2007-Jan-06 01:00:06 UTC (GMT +0000) - Poll: channel = TWO, refs = 595
+131400
2007-Jan-06 01:00:06 UTC (GMT +0000) - Poll: channel = TWO, refs = 659
+975924
2007-Jan-06 01:00:07 UTC (GMT +0000) - Poll: channel = THREE, refs = 5
+95148941

[download]
Thanks !

In reply to comb a logfile for time diff and occourance by tuakilan

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.