First, you use $line without defining it. That's just a typo, I'm assuming.

Next, if you want to test only the 4th column for the '987' condition, you'll want to change your 'if' test to compare only the correct field.

After that, you could easily use a regex to grab the desired time components.

I'm also going to remove the unnecessary label and invert the logic of the 'next' conditional test, for readability only. I'm also going to remove the quotes from around '987' because I hate unnecessary quotes around numbers. 

while (<THATFILE>) {
  next unless (/^\d+: \d{2}:/ );
  my @fields = split /,/;
  if ($fields[2] = 987) {
    my ($hour,$min,$sec) = /^\d+: (\d\d):(\d\d):(\d\d)/;
    ...
  }
}

[download]
buckaduck

In reply to Re: split into hash by buckaduck
in thread split into hash by Anonymous Monk

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.